1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * awk implementation for busybox
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4 | *
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5 | * Copyright (C) 2002 by Dmitry Zakharov <dmit@crp.bank.gov.ua>
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6 | *
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7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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8 | */
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9 |
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10 | //usage:#define awk_trivial_usage
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11 | //usage: "[OPTIONS] [AWK_PROGRAM] [FILE]..."
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12 | //usage:#define awk_full_usage "\n\n"
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13 | //usage: " -v VAR=VAL Set variable"
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14 | //usage: "\n -F SEP Use SEP as field separator"
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15 | //usage: "\n -f FILE Read program from FILE"
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16 |
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17 | #include "libbb.h"
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18 | #include "xregex.h"
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19 | #include <math.h>
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20 |
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21 | /* This is a NOEXEC applet. Be very careful! */
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22 |
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23 |
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24 | /* If you comment out one of these below, it will be #defined later
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25 | * to perform debug printfs to stderr: */
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26 | #define debug_printf_walker(...) do {} while (0)
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27 | #define debug_printf_eval(...) do {} while (0)
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28 | #define debug_printf_parse(...) do {} while (0)
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29 |
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30 | #ifndef debug_printf_walker
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31 | # define debug_printf_walker(...) (fprintf(stderr, __VA_ARGS__))
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32 | #endif
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33 | #ifndef debug_printf_eval
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34 | # define debug_printf_eval(...) (fprintf(stderr, __VA_ARGS__))
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35 | #endif
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36 | #ifndef debug_printf_parse
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37 | # define debug_printf_parse(...) (fprintf(stderr, __VA_ARGS__))
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38 | #endif
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39 |
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40 |
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41 |
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42 | #define MAXVARFMT 240
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43 | #define MINNVBLOCK 64
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44 |
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45 | /* variable flags */
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46 | #define VF_NUMBER 0x0001 /* 1 = primary type is number */
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47 | #define VF_ARRAY 0x0002 /* 1 = it's an array */
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48 |
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49 | #define VF_CACHED 0x0100 /* 1 = num/str value has cached str/num eq */
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50 | #define VF_USER 0x0200 /* 1 = user input (may be numeric string) */
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51 | #define VF_SPECIAL 0x0400 /* 1 = requires extra handling when changed */
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52 | #define VF_WALK 0x0800 /* 1 = variable has alloc'd x.walker list */
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53 | #define VF_FSTR 0x1000 /* 1 = var::string points to fstring buffer */
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54 | #define VF_CHILD 0x2000 /* 1 = function arg; x.parent points to source */
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55 | #define VF_DIRTY 0x4000 /* 1 = variable was set explicitly */
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56 |
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57 | /* these flags are static, don't change them when value is changed */
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58 | #define VF_DONTTOUCH (VF_ARRAY | VF_SPECIAL | VF_WALK | VF_CHILD | VF_DIRTY)
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59 |
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60 | typedef struct walker_list {
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61 | char *end;
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62 | char *cur;
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63 | struct walker_list *prev;
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64 | char wbuf[1];
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65 | } walker_list;
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66 |
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67 | /* Variable */
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68 | typedef struct var_s {
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69 | unsigned type; /* flags */
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70 | double number;
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71 | char *string;
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72 | union {
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73 | int aidx; /* func arg idx (for compilation stage) */
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74 | struct xhash_s *array; /* array ptr */
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75 | struct var_s *parent; /* for func args, ptr to actual parameter */
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76 | walker_list *walker; /* list of array elements (for..in) */
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77 | } x;
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78 | } var;
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79 |
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80 | /* Node chain (pattern-action chain, BEGIN, END, function bodies) */
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81 | typedef struct chain_s {
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82 | struct node_s *first;
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83 | struct node_s *last;
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84 | const char *programname;
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85 | } chain;
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86 |
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87 | /* Function */
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88 | typedef struct func_s {
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89 | unsigned nargs;
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90 | struct chain_s body;
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91 | } func;
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92 |
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93 | /* I/O stream */
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94 | typedef struct rstream_s {
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95 | FILE *F;
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96 | char *buffer;
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97 | int adv;
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98 | int size;
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99 | int pos;
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100 | smallint is_pipe;
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101 | } rstream;
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102 |
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103 | typedef struct hash_item_s {
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104 | union {
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105 | struct var_s v; /* variable/array hash */
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106 | struct rstream_s rs; /* redirect streams hash */
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107 | struct func_s f; /* functions hash */
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108 | } data;
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109 | struct hash_item_s *next; /* next in chain */
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110 | char name[1]; /* really it's longer */
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111 | } hash_item;
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112 |
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113 | typedef struct xhash_s {
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114 | unsigned nel; /* num of elements */
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115 | unsigned csize; /* current hash size */
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116 | unsigned nprime; /* next hash size in PRIMES[] */
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117 | unsigned glen; /* summary length of item names */
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118 | struct hash_item_s **items;
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119 | } xhash;
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120 |
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121 | /* Tree node */
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122 | typedef struct node_s {
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123 | uint32_t info;
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124 | unsigned lineno;
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125 | union {
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126 | struct node_s *n;
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127 | var *v;
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128 | int aidx;
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129 | char *new_progname;
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130 | regex_t *re;
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131 | } l;
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132 | union {
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133 | struct node_s *n;
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134 | regex_t *ire;
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135 | func *f;
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136 | } r;
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137 | union {
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138 | struct node_s *n;
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139 | } a;
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140 | } node;
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141 |
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142 | /* Block of temporary variables */
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143 | typedef struct nvblock_s {
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144 | int size;
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145 | var *pos;
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146 | struct nvblock_s *prev;
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147 | struct nvblock_s *next;
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148 | var nv[];
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149 | } nvblock;
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150 |
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151 | typedef struct tsplitter_s {
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152 | node n;
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153 | regex_t re[2];
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154 | } tsplitter;
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155 |
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156 | /* simple token classes */
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157 | /* Order and hex values are very important!!! See next_token() */
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158 | #define TC_SEQSTART 1 /* ( */
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159 | #define TC_SEQTERM (1 << 1) /* ) */
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160 | #define TC_REGEXP (1 << 2) /* /.../ */
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161 | #define TC_OUTRDR (1 << 3) /* | > >> */
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162 | #define TC_UOPPOST (1 << 4) /* unary postfix operator */
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163 | #define TC_UOPPRE1 (1 << 5) /* unary prefix operator */
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164 | #define TC_BINOPX (1 << 6) /* two-opnd operator */
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165 | #define TC_IN (1 << 7)
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166 | #define TC_COMMA (1 << 8)
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167 | #define TC_PIPE (1 << 9) /* input redirection pipe */
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168 | #define TC_UOPPRE2 (1 << 10) /* unary prefix operator */
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169 | #define TC_ARRTERM (1 << 11) /* ] */
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170 | #define TC_GRPSTART (1 << 12) /* { */
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171 | #define TC_GRPTERM (1 << 13) /* } */
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172 | #define TC_SEMICOL (1 << 14)
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173 | #define TC_NEWLINE (1 << 15)
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174 | #define TC_STATX (1 << 16) /* ctl statement (for, next...) */
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175 | #define TC_WHILE (1 << 17)
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176 | #define TC_ELSE (1 << 18)
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177 | #define TC_BUILTIN (1 << 19)
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178 | #define TC_GETLINE (1 << 20)
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179 | #define TC_FUNCDECL (1 << 21) /* `function' `func' */
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180 | #define TC_BEGIN (1 << 22)
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181 | #define TC_END (1 << 23)
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182 | #define TC_EOF (1 << 24)
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183 | #define TC_VARIABLE (1 << 25)
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184 | #define TC_ARRAY (1 << 26)
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185 | #define TC_FUNCTION (1 << 27)
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186 | #define TC_STRING (1 << 28)
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187 | #define TC_NUMBER (1 << 29)
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188 |
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189 | #define TC_UOPPRE (TC_UOPPRE1 | TC_UOPPRE2)
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190 |
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191 | /* combined token classes */
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192 | #define TC_BINOP (TC_BINOPX | TC_COMMA | TC_PIPE | TC_IN)
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193 | #define TC_UNARYOP (TC_UOPPRE | TC_UOPPOST)
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194 | #define TC_OPERAND (TC_VARIABLE | TC_ARRAY | TC_FUNCTION \
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195 | | TC_BUILTIN | TC_GETLINE | TC_SEQSTART | TC_STRING | TC_NUMBER)
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196 |
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197 | #define TC_STATEMNT (TC_STATX | TC_WHILE)
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198 | #define TC_OPTERM (TC_SEMICOL | TC_NEWLINE)
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199 |
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200 | /* word tokens, cannot mean something else if not expected */
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201 | #define TC_WORD (TC_IN | TC_STATEMNT | TC_ELSE | TC_BUILTIN \
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202 | | TC_GETLINE | TC_FUNCDECL | TC_BEGIN | TC_END)
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203 |
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204 | /* discard newlines after these */
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205 | #define TC_NOTERM (TC_COMMA | TC_GRPSTART | TC_GRPTERM \
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206 | | TC_BINOP | TC_OPTERM)
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207 |
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208 | /* what can expression begin with */
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209 | #define TC_OPSEQ (TC_OPERAND | TC_UOPPRE | TC_REGEXP)
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210 | /* what can group begin with */
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211 | #define TC_GRPSEQ (TC_OPSEQ | TC_OPTERM | TC_STATEMNT | TC_GRPSTART)
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212 |
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213 | /* if previous token class is CONCAT1 and next is CONCAT2, concatenation */
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214 | /* operator is inserted between them */
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215 | #define TC_CONCAT1 (TC_VARIABLE | TC_ARRTERM | TC_SEQTERM \
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216 | | TC_STRING | TC_NUMBER | TC_UOPPOST)
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217 | #define TC_CONCAT2 (TC_OPERAND | TC_UOPPRE)
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218 |
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219 | #define OF_RES1 0x010000
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220 | #define OF_RES2 0x020000
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221 | #define OF_STR1 0x040000
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222 | #define OF_STR2 0x080000
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223 | #define OF_NUM1 0x100000
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224 | #define OF_CHECKED 0x200000
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225 |
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226 | /* combined operator flags */
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227 | #define xx 0
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228 | #define xV OF_RES2
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229 | #define xS (OF_RES2 | OF_STR2)
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230 | #define Vx OF_RES1
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231 | #define VV (OF_RES1 | OF_RES2)
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232 | #define Nx (OF_RES1 | OF_NUM1)
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233 | #define NV (OF_RES1 | OF_NUM1 | OF_RES2)
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234 | #define Sx (OF_RES1 | OF_STR1)
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235 | #define SV (OF_RES1 | OF_STR1 | OF_RES2)
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236 | #define SS (OF_RES1 | OF_STR1 | OF_RES2 | OF_STR2)
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237 |
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238 | #define OPCLSMASK 0xFF00
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239 | #define OPNMASK 0x007F
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240 |
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241 | /* operator priority is a highest byte (even: r->l, odd: l->r grouping)
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242 | * For builtins it has different meaning: n n s3 s2 s1 v3 v2 v1,
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243 | * n - min. number of args, vN - resolve Nth arg to var, sN - resolve to string
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244 | */
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245 | #undef P
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246 | #undef PRIMASK
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247 | #undef PRIMASK2
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248 | #define P(x) (x << 24)
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249 | #define PRIMASK 0x7F000000
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250 | #define PRIMASK2 0x7E000000
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251 |
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252 | /* Operation classes */
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253 |
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254 | #define SHIFT_TIL_THIS 0x0600
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255 | #define RECUR_FROM_THIS 0x1000
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256 |
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257 | enum {
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258 | OC_DELETE = 0x0100, OC_EXEC = 0x0200, OC_NEWSOURCE = 0x0300,
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259 | OC_PRINT = 0x0400, OC_PRINTF = 0x0500, OC_WALKINIT = 0x0600,
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260 |
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261 | OC_BR = 0x0700, OC_BREAK = 0x0800, OC_CONTINUE = 0x0900,
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262 | OC_EXIT = 0x0a00, OC_NEXT = 0x0b00, OC_NEXTFILE = 0x0c00,
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263 | OC_TEST = 0x0d00, OC_WALKNEXT = 0x0e00,
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264 |
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265 | OC_BINARY = 0x1000, OC_BUILTIN = 0x1100, OC_COLON = 0x1200,
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266 | OC_COMMA = 0x1300, OC_COMPARE = 0x1400, OC_CONCAT = 0x1500,
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267 | OC_FBLTIN = 0x1600, OC_FIELD = 0x1700, OC_FNARG = 0x1800,
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268 | OC_FUNC = 0x1900, OC_GETLINE = 0x1a00, OC_IN = 0x1b00,
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269 | OC_LAND = 0x1c00, OC_LOR = 0x1d00, OC_MATCH = 0x1e00,
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270 | OC_MOVE = 0x1f00, OC_PGETLINE = 0x2000, OC_REGEXP = 0x2100,
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271 | OC_REPLACE = 0x2200, OC_RETURN = 0x2300, OC_SPRINTF = 0x2400,
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272 | OC_TERNARY = 0x2500, OC_UNARY = 0x2600, OC_VAR = 0x2700,
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273 | OC_DONE = 0x2800,
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274 |
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275 | ST_IF = 0x3000, ST_DO = 0x3100, ST_FOR = 0x3200,
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276 | ST_WHILE = 0x3300
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277 | };
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278 |
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279 | /* simple builtins */
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280 | enum {
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281 | F_in, F_rn, F_co, F_ex, F_lg, F_si, F_sq, F_sr,
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282 | F_ti, F_le, F_sy, F_ff, F_cl
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283 | };
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284 |
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285 | /* builtins */
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286 | enum {
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287 | B_a2, B_ix, B_ma, B_sp, B_ss, B_ti, B_mt, B_lo, B_up,
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288 | B_ge, B_gs, B_su,
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289 | B_an, B_co, B_ls, B_or, B_rs, B_xo,
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290 | };
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291 |
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292 | /* tokens and their corresponding info values */
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293 |
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294 | #define NTC "\377" /* switch to next token class (tc<<1) */
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295 | #define NTCC '\377'
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296 |
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297 | #define OC_B OC_BUILTIN
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298 |
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299 | static const char tokenlist[] ALIGN1 =
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300 | "\1(" NTC
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301 | "\1)" NTC
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302 | "\1/" NTC /* REGEXP */
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303 | "\2>>" "\1>" "\1|" NTC /* OUTRDR */
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304 | "\2++" "\2--" NTC /* UOPPOST */
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305 | "\2++" "\2--" "\1$" NTC /* UOPPRE1 */
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306 | "\2==" "\1=" "\2+=" "\2-=" /* BINOPX */
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307 | "\2*=" "\2/=" "\2%=" "\2^="
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308 | "\1+" "\1-" "\3**=" "\2**"
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309 | "\1/" "\1%" "\1^" "\1*"
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310 | "\2!=" "\2>=" "\2<=" "\1>"
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311 | "\1<" "\2!~" "\1~" "\2&&"
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312 | "\2||" "\1?" "\1:" NTC
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313 | "\2in" NTC
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314 | "\1," NTC
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315 | "\1|" NTC
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316 | "\1+" "\1-" "\1!" NTC /* UOPPRE2 */
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317 | "\1]" NTC
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318 | "\1{" NTC
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319 | "\1}" NTC
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320 | "\1;" NTC
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321 | "\1\n" NTC
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322 | "\2if" "\2do" "\3for" "\5break" /* STATX */
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323 | "\10continue" "\6delete" "\5print"
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324 | "\6printf" "\4next" "\10nextfile"
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325 | "\6return" "\4exit" NTC
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326 | "\5while" NTC
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327 | "\4else" NTC
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328 |
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329 | "\3and" "\5compl" "\6lshift" "\2or"
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330 | "\6rshift" "\3xor"
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331 | "\5close" "\6system" "\6fflush" "\5atan2" /* BUILTIN */
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332 | "\3cos" "\3exp" "\3int" "\3log"
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333 | "\4rand" "\3sin" "\4sqrt" "\5srand"
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334 | "\6gensub" "\4gsub" "\5index" "\6length"
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335 | "\5match" "\5split" "\7sprintf" "\3sub"
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336 | "\6substr" "\7systime" "\10strftime" "\6mktime"
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337 | "\7tolower" "\7toupper" NTC
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338 | "\7getline" NTC
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339 | "\4func" "\10function" NTC
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340 | "\5BEGIN" NTC
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341 | "\3END"
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342 | /* compiler adds trailing "\0" */
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343 | ;
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344 |
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345 | static const uint32_t tokeninfo[] = {
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346 | 0,
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347 | 0,
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348 | OC_REGEXP,
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349 | xS|'a', xS|'w', xS|'|',
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350 | OC_UNARY|xV|P(9)|'p', OC_UNARY|xV|P(9)|'m',
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351 | OC_UNARY|xV|P(9)|'P', OC_UNARY|xV|P(9)|'M', OC_FIELD|xV|P(5),
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352 | OC_COMPARE|VV|P(39)|5, OC_MOVE|VV|P(74), OC_REPLACE|NV|P(74)|'+', OC_REPLACE|NV|P(74)|'-',
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353 | OC_REPLACE|NV|P(74)|'*', OC_REPLACE|NV|P(74)|'/', OC_REPLACE|NV|P(74)|'%', OC_REPLACE|NV|P(74)|'&',
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354 | OC_BINARY|NV|P(29)|'+', OC_BINARY|NV|P(29)|'-', OC_REPLACE|NV|P(74)|'&', OC_BINARY|NV|P(15)|'&',
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355 | OC_BINARY|NV|P(25)|'/', OC_BINARY|NV|P(25)|'%', OC_BINARY|NV|P(15)|'&', OC_BINARY|NV|P(25)|'*',
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356 | OC_COMPARE|VV|P(39)|4, OC_COMPARE|VV|P(39)|3, OC_COMPARE|VV|P(39)|0, OC_COMPARE|VV|P(39)|1,
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357 | OC_COMPARE|VV|P(39)|2, OC_MATCH|Sx|P(45)|'!', OC_MATCH|Sx|P(45)|'~', OC_LAND|Vx|P(55),
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358 | OC_LOR|Vx|P(59), OC_TERNARY|Vx|P(64)|'?', OC_COLON|xx|P(67)|':',
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359 | OC_IN|SV|P(49), /* in */
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360 | OC_COMMA|SS|P(80),
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361 | OC_PGETLINE|SV|P(37),
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362 | OC_UNARY|xV|P(19)|'+', OC_UNARY|xV|P(19)|'-', OC_UNARY|xV|P(19)|'!',
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363 | 0, /* ] */
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364 | 0,
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365 | 0,
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366 | 0,
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367 | 0, /* \n */
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368 | ST_IF, ST_DO, ST_FOR, OC_BREAK,
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369 | OC_CONTINUE, OC_DELETE|Vx, OC_PRINT,
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370 | OC_PRINTF, OC_NEXT, OC_NEXTFILE,
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371 | OC_RETURN|Vx, OC_EXIT|Nx,
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372 | ST_WHILE,
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373 | 0, /* else */
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374 |
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375 | OC_B|B_an|P(0x83), OC_B|B_co|P(0x41), OC_B|B_ls|P(0x83), OC_B|B_or|P(0x83),
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376 | OC_B|B_rs|P(0x83), OC_B|B_xo|P(0x83),
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377 | OC_FBLTIN|Sx|F_cl, OC_FBLTIN|Sx|F_sy, OC_FBLTIN|Sx|F_ff, OC_B|B_a2|P(0x83),
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378 | OC_FBLTIN|Nx|F_co, OC_FBLTIN|Nx|F_ex, OC_FBLTIN|Nx|F_in, OC_FBLTIN|Nx|F_lg,
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379 | OC_FBLTIN|F_rn, OC_FBLTIN|Nx|F_si, OC_FBLTIN|Nx|F_sq, OC_FBLTIN|Nx|F_sr,
|
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380 | OC_B|B_ge|P(0xd6), OC_B|B_gs|P(0xb6), OC_B|B_ix|P(0x9b), OC_FBLTIN|Sx|F_le,
|
---|
381 | OC_B|B_ma|P(0x89), OC_B|B_sp|P(0x8b), OC_SPRINTF, OC_B|B_su|P(0xb6),
|
---|
382 | OC_B|B_ss|P(0x8f), OC_FBLTIN|F_ti, OC_B|B_ti|P(0x0b), OC_B|B_mt|P(0x0b),
|
---|
383 | OC_B|B_lo|P(0x49), OC_B|B_up|P(0x49),
|
---|
384 | OC_GETLINE|SV|P(0),
|
---|
385 | 0, 0,
|
---|
386 | 0,
|
---|
387 | 0 /* END */
|
---|
388 | };
|
---|
389 |
|
---|
390 | /* internal variable names and their initial values */
|
---|
391 | /* asterisk marks SPECIAL vars; $ is just no-named Field0 */
|
---|
392 | enum {
|
---|
393 | CONVFMT, OFMT, FS, OFS,
|
---|
394 | ORS, RS, RT, FILENAME,
|
---|
395 | SUBSEP, F0, ARGIND, ARGC,
|
---|
396 | ARGV, ERRNO, FNR, NR,
|
---|
397 | NF, IGNORECASE, ENVIRON, NUM_INTERNAL_VARS
|
---|
398 | };
|
---|
399 |
|
---|
400 | static const char vNames[] ALIGN1 =
|
---|
401 | "CONVFMT\0" "OFMT\0" "FS\0*" "OFS\0"
|
---|
402 | "ORS\0" "RS\0*" "RT\0" "FILENAME\0"
|
---|
403 | "SUBSEP\0" "$\0*" "ARGIND\0" "ARGC\0"
|
---|
404 | "ARGV\0" "ERRNO\0" "FNR\0" "NR\0"
|
---|
405 | "NF\0*" "IGNORECASE\0*" "ENVIRON\0" "\0";
|
---|
406 |
|
---|
407 | static const char vValues[] ALIGN1 =
|
---|
408 | "%.6g\0" "%.6g\0" " \0" " \0"
|
---|
409 | "\n\0" "\n\0" "\0" "\0"
|
---|
410 | "\034\0" "\0" "\377";
|
---|
411 |
|
---|
412 | /* hash size may grow to these values */
|
---|
413 | #define FIRST_PRIME 61
|
---|
414 | static const uint16_t PRIMES[] ALIGN2 = { 251, 1021, 4093, 16381, 65521 };
|
---|
415 |
|
---|
416 |
|
---|
417 | /* Globals. Split in two parts so that first one is addressed
|
---|
418 | * with (mostly short) negative offsets.
|
---|
419 | * NB: it's unsafe to put members of type "double"
|
---|
420 | * into globals2 (gcc may fail to align them).
|
---|
421 | */
|
---|
422 | struct globals {
|
---|
423 | double t_double;
|
---|
424 | chain beginseq, mainseq, endseq;
|
---|
425 | chain *seq;
|
---|
426 | node *break_ptr, *continue_ptr;
|
---|
427 | rstream *iF;
|
---|
428 | xhash *vhash, *ahash, *fdhash, *fnhash;
|
---|
429 | const char *g_progname;
|
---|
430 | int g_lineno;
|
---|
431 | int nfields;
|
---|
432 | int maxfields; /* used in fsrealloc() only */
|
---|
433 | var *Fields;
|
---|
434 | nvblock *g_cb;
|
---|
435 | char *g_pos;
|
---|
436 | char *g_buf;
|
---|
437 | smallint icase;
|
---|
438 | smallint exiting;
|
---|
439 | smallint nextrec;
|
---|
440 | smallint nextfile;
|
---|
441 | smallint is_f0_split;
|
---|
442 | smallint t_rollback;
|
---|
443 | };
|
---|
444 | struct globals2 {
|
---|
445 | uint32_t t_info; /* often used */
|
---|
446 | uint32_t t_tclass;
|
---|
447 | char *t_string;
|
---|
448 | int t_lineno;
|
---|
449 |
|
---|
450 | var *intvar[NUM_INTERNAL_VARS]; /* often used */
|
---|
451 |
|
---|
452 | /* former statics from various functions */
|
---|
453 | char *split_f0__fstrings;
|
---|
454 |
|
---|
455 | uint32_t next_token__save_tclass;
|
---|
456 | uint32_t next_token__save_info;
|
---|
457 | uint32_t next_token__ltclass;
|
---|
458 | smallint next_token__concat_inserted;
|
---|
459 |
|
---|
460 | smallint next_input_file__files_happen;
|
---|
461 | rstream next_input_file__rsm;
|
---|
462 |
|
---|
463 | var *evaluate__fnargs;
|
---|
464 | unsigned evaluate__seed;
|
---|
465 | regex_t evaluate__sreg;
|
---|
466 |
|
---|
467 | var ptest__v;
|
---|
468 |
|
---|
469 | tsplitter exec_builtin__tspl;
|
---|
470 |
|
---|
471 | /* biggest and least used members go last */
|
---|
472 | tsplitter fsplitter, rsplitter;
|
---|
473 | };
|
---|
474 | #define G1 (ptr_to_globals[-1])
|
---|
475 | #define G (*(struct globals2 *)ptr_to_globals)
|
---|
476 | /* For debug. nm --size-sort awk.o | grep -vi ' [tr] ' */
|
---|
477 | /*char G1size[sizeof(G1)]; - 0x74 */
|
---|
478 | /*char Gsize[sizeof(G)]; - 0x1c4 */
|
---|
479 | /* Trying to keep most of members accessible with short offsets: */
|
---|
480 | /*char Gofs_seed[offsetof(struct globals2, evaluate__seed)]; - 0x90 */
|
---|
481 | #define t_double (G1.t_double )
|
---|
482 | #define beginseq (G1.beginseq )
|
---|
483 | #define mainseq (G1.mainseq )
|
---|
484 | #define endseq (G1.endseq )
|
---|
485 | #define seq (G1.seq )
|
---|
486 | #define break_ptr (G1.break_ptr )
|
---|
487 | #define continue_ptr (G1.continue_ptr)
|
---|
488 | #define iF (G1.iF )
|
---|
489 | #define vhash (G1.vhash )
|
---|
490 | #define ahash (G1.ahash )
|
---|
491 | #define fdhash (G1.fdhash )
|
---|
492 | #define fnhash (G1.fnhash )
|
---|
493 | #define g_progname (G1.g_progname )
|
---|
494 | #define g_lineno (G1.g_lineno )
|
---|
495 | #define nfields (G1.nfields )
|
---|
496 | #define maxfields (G1.maxfields )
|
---|
497 | #define Fields (G1.Fields )
|
---|
498 | #define g_cb (G1.g_cb )
|
---|
499 | #define g_pos (G1.g_pos )
|
---|
500 | #define g_buf (G1.g_buf )
|
---|
501 | #define icase (G1.icase )
|
---|
502 | #define exiting (G1.exiting )
|
---|
503 | #define nextrec (G1.nextrec )
|
---|
504 | #define nextfile (G1.nextfile )
|
---|
505 | #define is_f0_split (G1.is_f0_split )
|
---|
506 | #define t_rollback (G1.t_rollback )
|
---|
507 | #define t_info (G.t_info )
|
---|
508 | #define t_tclass (G.t_tclass )
|
---|
509 | #define t_string (G.t_string )
|
---|
510 | #define t_lineno (G.t_lineno )
|
---|
511 | #define intvar (G.intvar )
|
---|
512 | #define fsplitter (G.fsplitter )
|
---|
513 | #define rsplitter (G.rsplitter )
|
---|
514 | #define INIT_G() do { \
|
---|
515 | SET_PTR_TO_GLOBALS((char*)xzalloc(sizeof(G1)+sizeof(G)) + sizeof(G1)); \
|
---|
516 | G.next_token__ltclass = TC_OPTERM; \
|
---|
517 | G.evaluate__seed = 1; \
|
---|
518 | } while (0)
|
---|
519 |
|
---|
520 |
|
---|
521 | /* function prototypes */
|
---|
522 | static void handle_special(var *);
|
---|
523 | static node *parse_expr(uint32_t);
|
---|
524 | static void chain_group(void);
|
---|
525 | static var *evaluate(node *, var *);
|
---|
526 | static rstream *next_input_file(void);
|
---|
527 | static int fmt_num(char *, int, const char *, double, int);
|
---|
528 | static int awk_exit(int) NORETURN;
|
---|
529 |
|
---|
530 | /* ---- error handling ---- */
|
---|
531 |
|
---|
532 | static const char EMSG_INTERNAL_ERROR[] ALIGN1 = "Internal error";
|
---|
533 | static const char EMSG_UNEXP_EOS[] ALIGN1 = "Unexpected end of string";
|
---|
534 | static const char EMSG_UNEXP_TOKEN[] ALIGN1 = "Unexpected token";
|
---|
535 | static const char EMSG_DIV_BY_ZERO[] ALIGN1 = "Division by zero";
|
---|
536 | static const char EMSG_INV_FMT[] ALIGN1 = "Invalid format specifier";
|
---|
537 | static const char EMSG_TOO_FEW_ARGS[] ALIGN1 = "Too few arguments for builtin";
|
---|
538 | static const char EMSG_NOT_ARRAY[] ALIGN1 = "Not an array";
|
---|
539 | static const char EMSG_POSSIBLE_ERROR[] ALIGN1 = "Possible syntax error";
|
---|
540 | static const char EMSG_UNDEF_FUNC[] ALIGN1 = "Call to undefined function";
|
---|
541 | static const char EMSG_NO_MATH[] ALIGN1 = "Math support is not compiled in";
|
---|
542 |
|
---|
543 | static void zero_out_var(var *vp)
|
---|
544 | {
|
---|
545 | memset(vp, 0, sizeof(*vp));
|
---|
546 | }
|
---|
547 |
|
---|
548 | static void syntax_error(const char *message) NORETURN;
|
---|
549 | static void syntax_error(const char *message)
|
---|
550 | {
|
---|
551 | bb_error_msg_and_die("%s:%i: %s", g_progname, g_lineno, message);
|
---|
552 | }
|
---|
553 |
|
---|
554 | /* ---- hash stuff ---- */
|
---|
555 |
|
---|
556 | static unsigned hashidx(const char *name)
|
---|
557 | {
|
---|
558 | unsigned idx = 0;
|
---|
559 |
|
---|
560 | while (*name)
|
---|
561 | idx = *name++ + (idx << 6) - idx;
|
---|
562 | return idx;
|
---|
563 | }
|
---|
564 |
|
---|
565 | /* create new hash */
|
---|
566 | static xhash *hash_init(void)
|
---|
567 | {
|
---|
568 | xhash *newhash;
|
---|
569 |
|
---|
570 | newhash = xzalloc(sizeof(*newhash));
|
---|
571 | newhash->csize = FIRST_PRIME;
|
---|
572 | newhash->items = xzalloc(FIRST_PRIME * sizeof(newhash->items[0]));
|
---|
573 |
|
---|
574 | return newhash;
|
---|
575 | }
|
---|
576 |
|
---|
577 | /* find item in hash, return ptr to data, NULL if not found */
|
---|
578 | static void *hash_search(xhash *hash, const char *name)
|
---|
579 | {
|
---|
580 | hash_item *hi;
|
---|
581 |
|
---|
582 | hi = hash->items[hashidx(name) % hash->csize];
|
---|
583 | while (hi) {
|
---|
584 | if (strcmp(hi->name, name) == 0)
|
---|
585 | return &hi->data;
|
---|
586 | hi = hi->next;
|
---|
587 | }
|
---|
588 | return NULL;
|
---|
589 | }
|
---|
590 |
|
---|
591 | /* grow hash if it becomes too big */
|
---|
592 | static void hash_rebuild(xhash *hash)
|
---|
593 | {
|
---|
594 | unsigned newsize, i, idx;
|
---|
595 | hash_item **newitems, *hi, *thi;
|
---|
596 |
|
---|
597 | if (hash->nprime == ARRAY_SIZE(PRIMES))
|
---|
598 | return;
|
---|
599 |
|
---|
600 | newsize = PRIMES[hash->nprime++];
|
---|
601 | newitems = xzalloc(newsize * sizeof(newitems[0]));
|
---|
602 |
|
---|
603 | for (i = 0; i < hash->csize; i++) {
|
---|
604 | hi = hash->items[i];
|
---|
605 | while (hi) {
|
---|
606 | thi = hi;
|
---|
607 | hi = thi->next;
|
---|
608 | idx = hashidx(thi->name) % newsize;
|
---|
609 | thi->next = newitems[idx];
|
---|
610 | newitems[idx] = thi;
|
---|
611 | }
|
---|
612 | }
|
---|
613 |
|
---|
614 | free(hash->items);
|
---|
615 | hash->csize = newsize;
|
---|
616 | hash->items = newitems;
|
---|
617 | }
|
---|
618 |
|
---|
619 | /* find item in hash, add it if necessary. Return ptr to data */
|
---|
620 | static void *hash_find(xhash *hash, const char *name)
|
---|
621 | {
|
---|
622 | hash_item *hi;
|
---|
623 | unsigned idx;
|
---|
624 | int l;
|
---|
625 |
|
---|
626 | hi = hash_search(hash, name);
|
---|
627 | if (!hi) {
|
---|
628 | if (++hash->nel / hash->csize > 10)
|
---|
629 | hash_rebuild(hash);
|
---|
630 |
|
---|
631 | l = strlen(name) + 1;
|
---|
632 | hi = xzalloc(sizeof(*hi) + l);
|
---|
633 | strcpy(hi->name, name);
|
---|
634 |
|
---|
635 | idx = hashidx(name) % hash->csize;
|
---|
636 | hi->next = hash->items[idx];
|
---|
637 | hash->items[idx] = hi;
|
---|
638 | hash->glen += l;
|
---|
639 | }
|
---|
640 | return &hi->data;
|
---|
641 | }
|
---|
642 |
|
---|
643 | #define findvar(hash, name) ((var*) hash_find((hash), (name)))
|
---|
644 | #define newvar(name) ((var*) hash_find(vhash, (name)))
|
---|
645 | #define newfile(name) ((rstream*)hash_find(fdhash, (name)))
|
---|
646 | #define newfunc(name) ((func*) hash_find(fnhash, (name)))
|
---|
647 |
|
---|
648 | static void hash_remove(xhash *hash, const char *name)
|
---|
649 | {
|
---|
650 | hash_item *hi, **phi;
|
---|
651 |
|
---|
652 | phi = &hash->items[hashidx(name) % hash->csize];
|
---|
653 | while (*phi) {
|
---|
654 | hi = *phi;
|
---|
655 | if (strcmp(hi->name, name) == 0) {
|
---|
656 | hash->glen -= (strlen(name) + 1);
|
---|
657 | hash->nel--;
|
---|
658 | *phi = hi->next;
|
---|
659 | free(hi);
|
---|
660 | break;
|
---|
661 | }
|
---|
662 | phi = &hi->next;
|
---|
663 | }
|
---|
664 | }
|
---|
665 |
|
---|
666 | /* ------ some useful functions ------ */
|
---|
667 |
|
---|
668 | static char *skip_spaces(char *p)
|
---|
669 | {
|
---|
670 | while (1) {
|
---|
671 | if (*p == '\\' && p[1] == '\n') {
|
---|
672 | p++;
|
---|
673 | t_lineno++;
|
---|
674 | } else if (*p != ' ' && *p != '\t') {
|
---|
675 | break;
|
---|
676 | }
|
---|
677 | p++;
|
---|
678 | }
|
---|
679 | return p;
|
---|
680 | }
|
---|
681 |
|
---|
682 | /* returns old *s, advances *s past word and terminating NUL */
|
---|
683 | static char *nextword(char **s)
|
---|
684 | {
|
---|
685 | char *p = *s;
|
---|
686 | while (*(*s)++ != '\0')
|
---|
687 | continue;
|
---|
688 | return p;
|
---|
689 | }
|
---|
690 |
|
---|
691 | static char nextchar(char **s)
|
---|
692 | {
|
---|
693 | char c, *pps;
|
---|
694 |
|
---|
695 | c = *(*s)++;
|
---|
696 | pps = *s;
|
---|
697 | if (c == '\\')
|
---|
698 | c = bb_process_escape_sequence((const char**)s);
|
---|
699 | /* Example awk statement:
|
---|
700 | * s = "abc\"def"
|
---|
701 | * we must treat \" as "
|
---|
702 | */
|
---|
703 | if (c == '\\' && *s == pps) { /* unrecognized \z? */
|
---|
704 | c = *(*s); /* yes, fetch z */
|
---|
705 | if (c)
|
---|
706 | (*s)++; /* advance unless z = NUL */
|
---|
707 | }
|
---|
708 | return c;
|
---|
709 | }
|
---|
710 |
|
---|
711 | /* TODO: merge with strcpy_and_process_escape_sequences()?
|
---|
712 | */
|
---|
713 | static void unescape_string_in_place(char *s1)
|
---|
714 | {
|
---|
715 | char *s = s1;
|
---|
716 | while ((*s1 = nextchar(&s)) != '\0')
|
---|
717 | s1++;
|
---|
718 | }
|
---|
719 |
|
---|
720 | static ALWAYS_INLINE int isalnum_(int c)
|
---|
721 | {
|
---|
722 | return (isalnum(c) || c == '_');
|
---|
723 | }
|
---|
724 |
|
---|
725 | static double my_strtod(char **pp)
|
---|
726 | {
|
---|
727 | char *cp = *pp;
|
---|
728 | if (ENABLE_DESKTOP && cp[0] == '0') {
|
---|
729 | /* Might be hex or octal integer: 0x123abc or 07777 */
|
---|
730 | char c = (cp[1] | 0x20);
|
---|
731 | if (c == 'x' || isdigit(cp[1])) {
|
---|
732 | unsigned long long ull = strtoull(cp, pp, 0);
|
---|
733 | if (c == 'x')
|
---|
734 | return ull;
|
---|
735 | c = **pp;
|
---|
736 | if (!isdigit(c) && c != '.')
|
---|
737 | return ull;
|
---|
738 | /* else: it may be a floating number. Examples:
|
---|
739 | * 009.123 (*pp points to '9')
|
---|
740 | * 000.123 (*pp points to '.')
|
---|
741 | * fall through to strtod.
|
---|
742 | */
|
---|
743 | }
|
---|
744 | }
|
---|
745 | return strtod(cp, pp);
|
---|
746 | }
|
---|
747 |
|
---|
748 | /* -------- working with variables (set/get/copy/etc) -------- */
|
---|
749 |
|
---|
750 | static xhash *iamarray(var *v)
|
---|
751 | {
|
---|
752 | var *a = v;
|
---|
753 |
|
---|
754 | while (a->type & VF_CHILD)
|
---|
755 | a = a->x.parent;
|
---|
756 |
|
---|
757 | if (!(a->type & VF_ARRAY)) {
|
---|
758 | a->type |= VF_ARRAY;
|
---|
759 | a->x.array = hash_init();
|
---|
760 | }
|
---|
761 | return a->x.array;
|
---|
762 | }
|
---|
763 |
|
---|
764 | static void clear_array(xhash *array)
|
---|
765 | {
|
---|
766 | unsigned i;
|
---|
767 | hash_item *hi, *thi;
|
---|
768 |
|
---|
769 | for (i = 0; i < array->csize; i++) {
|
---|
770 | hi = array->items[i];
|
---|
771 | while (hi) {
|
---|
772 | thi = hi;
|
---|
773 | hi = hi->next;
|
---|
774 | free(thi->data.v.string);
|
---|
775 | free(thi);
|
---|
776 | }
|
---|
777 | array->items[i] = NULL;
|
---|
778 | }
|
---|
779 | array->glen = array->nel = 0;
|
---|
780 | }
|
---|
781 |
|
---|
782 | /* clear a variable */
|
---|
783 | static var *clrvar(var *v)
|
---|
784 | {
|
---|
785 | if (!(v->type & VF_FSTR))
|
---|
786 | free(v->string);
|
---|
787 |
|
---|
788 | v->type &= VF_DONTTOUCH;
|
---|
789 | v->type |= VF_DIRTY;
|
---|
790 | v->string = NULL;
|
---|
791 | return v;
|
---|
792 | }
|
---|
793 |
|
---|
794 | /* assign string value to variable */
|
---|
795 | static var *setvar_p(var *v, char *value)
|
---|
796 | {
|
---|
797 | clrvar(v);
|
---|
798 | v->string = value;
|
---|
799 | handle_special(v);
|
---|
800 | return v;
|
---|
801 | }
|
---|
802 |
|
---|
803 | /* same as setvar_p but make a copy of string */
|
---|
804 | static var *setvar_s(var *v, const char *value)
|
---|
805 | {
|
---|
806 | return setvar_p(v, (value && *value) ? xstrdup(value) : NULL);
|
---|
807 | }
|
---|
808 |
|
---|
809 | /* same as setvar_s but sets USER flag */
|
---|
810 | static var *setvar_u(var *v, const char *value)
|
---|
811 | {
|
---|
812 | v = setvar_s(v, value);
|
---|
813 | v->type |= VF_USER;
|
---|
814 | return v;
|
---|
815 | }
|
---|
816 |
|
---|
817 | /* set array element to user string */
|
---|
818 | static void setari_u(var *a, int idx, const char *s)
|
---|
819 | {
|
---|
820 | var *v;
|
---|
821 |
|
---|
822 | v = findvar(iamarray(a), itoa(idx));
|
---|
823 | setvar_u(v, s);
|
---|
824 | }
|
---|
825 |
|
---|
826 | /* assign numeric value to variable */
|
---|
827 | static var *setvar_i(var *v, double value)
|
---|
828 | {
|
---|
829 | clrvar(v);
|
---|
830 | v->type |= VF_NUMBER;
|
---|
831 | v->number = value;
|
---|
832 | handle_special(v);
|
---|
833 | return v;
|
---|
834 | }
|
---|
835 |
|
---|
836 | static const char *getvar_s(var *v)
|
---|
837 | {
|
---|
838 | /* if v is numeric and has no cached string, convert it to string */
|
---|
839 | if ((v->type & (VF_NUMBER | VF_CACHED)) == VF_NUMBER) {
|
---|
840 | fmt_num(g_buf, MAXVARFMT, getvar_s(intvar[CONVFMT]), v->number, TRUE);
|
---|
841 | v->string = xstrdup(g_buf);
|
---|
842 | v->type |= VF_CACHED;
|
---|
843 | }
|
---|
844 | return (v->string == NULL) ? "" : v->string;
|
---|
845 | }
|
---|
846 |
|
---|
847 | static double getvar_i(var *v)
|
---|
848 | {
|
---|
849 | char *s;
|
---|
850 |
|
---|
851 | if ((v->type & (VF_NUMBER | VF_CACHED)) == 0) {
|
---|
852 | v->number = 0;
|
---|
853 | s = v->string;
|
---|
854 | if (s && *s) {
|
---|
855 | debug_printf_eval("getvar_i: '%s'->", s);
|
---|
856 | v->number = my_strtod(&s);
|
---|
857 | debug_printf_eval("%f (s:'%s')\n", v->number, s);
|
---|
858 | if (v->type & VF_USER) {
|
---|
859 | s = skip_spaces(s);
|
---|
860 | if (*s != '\0')
|
---|
861 | v->type &= ~VF_USER;
|
---|
862 | }
|
---|
863 | } else {
|
---|
864 | debug_printf_eval("getvar_i: '%s'->zero\n", s);
|
---|
865 | v->type &= ~VF_USER;
|
---|
866 | }
|
---|
867 | v->type |= VF_CACHED;
|
---|
868 | }
|
---|
869 | debug_printf_eval("getvar_i: %f\n", v->number);
|
---|
870 | return v->number;
|
---|
871 | }
|
---|
872 |
|
---|
873 | /* Used for operands of bitwise ops */
|
---|
874 | static unsigned long getvar_i_int(var *v)
|
---|
875 | {
|
---|
876 | double d = getvar_i(v);
|
---|
877 |
|
---|
878 | /* Casting doubles to longs is undefined for values outside
|
---|
879 | * of target type range. Try to widen it as much as possible */
|
---|
880 | if (d >= 0)
|
---|
881 | return (unsigned long)d;
|
---|
882 | /* Why? Think about d == -4294967295.0 (assuming 32bit longs) */
|
---|
883 | return - (long) (unsigned long) (-d);
|
---|
884 | }
|
---|
885 |
|
---|
886 | static var *copyvar(var *dest, const var *src)
|
---|
887 | {
|
---|
888 | if (dest != src) {
|
---|
889 | clrvar(dest);
|
---|
890 | dest->type |= (src->type & ~(VF_DONTTOUCH | VF_FSTR));
|
---|
891 | debug_printf_eval("copyvar: number:%f string:'%s'\n", src->number, src->string);
|
---|
892 | dest->number = src->number;
|
---|
893 | if (src->string)
|
---|
894 | dest->string = xstrdup(src->string);
|
---|
895 | }
|
---|
896 | handle_special(dest);
|
---|
897 | return dest;
|
---|
898 | }
|
---|
899 |
|
---|
900 | static var *incvar(var *v)
|
---|
901 | {
|
---|
902 | return setvar_i(v, getvar_i(v) + 1.0);
|
---|
903 | }
|
---|
904 |
|
---|
905 | /* return true if v is number or numeric string */
|
---|
906 | static int is_numeric(var *v)
|
---|
907 | {
|
---|
908 | getvar_i(v);
|
---|
909 | return ((v->type ^ VF_DIRTY) & (VF_NUMBER | VF_USER | VF_DIRTY));
|
---|
910 | }
|
---|
911 |
|
---|
912 | /* return 1 when value of v corresponds to true, 0 otherwise */
|
---|
913 | static int istrue(var *v)
|
---|
914 | {
|
---|
915 | if (is_numeric(v))
|
---|
916 | return (v->number != 0);
|
---|
917 | return (v->string && v->string[0]);
|
---|
918 | }
|
---|
919 |
|
---|
920 | /* temporary variables allocator. Last allocated should be first freed */
|
---|
921 | static var *nvalloc(int n)
|
---|
922 | {
|
---|
923 | nvblock *pb = NULL;
|
---|
924 | var *v, *r;
|
---|
925 | int size;
|
---|
926 |
|
---|
927 | while (g_cb) {
|
---|
928 | pb = g_cb;
|
---|
929 | if ((g_cb->pos - g_cb->nv) + n <= g_cb->size)
|
---|
930 | break;
|
---|
931 | g_cb = g_cb->next;
|
---|
932 | }
|
---|
933 |
|
---|
934 | if (!g_cb) {
|
---|
935 | size = (n <= MINNVBLOCK) ? MINNVBLOCK : n;
|
---|
936 | g_cb = xzalloc(sizeof(nvblock) + size * sizeof(var));
|
---|
937 | g_cb->size = size;
|
---|
938 | g_cb->pos = g_cb->nv;
|
---|
939 | g_cb->prev = pb;
|
---|
940 | /*g_cb->next = NULL; - xzalloc did it */
|
---|
941 | if (pb)
|
---|
942 | pb->next = g_cb;
|
---|
943 | }
|
---|
944 |
|
---|
945 | v = r = g_cb->pos;
|
---|
946 | g_cb->pos += n;
|
---|
947 |
|
---|
948 | while (v < g_cb->pos) {
|
---|
949 | v->type = 0;
|
---|
950 | v->string = NULL;
|
---|
951 | v++;
|
---|
952 | }
|
---|
953 |
|
---|
954 | return r;
|
---|
955 | }
|
---|
956 |
|
---|
957 | static void nvfree(var *v)
|
---|
958 | {
|
---|
959 | var *p;
|
---|
960 |
|
---|
961 | if (v < g_cb->nv || v >= g_cb->pos)
|
---|
962 | syntax_error(EMSG_INTERNAL_ERROR);
|
---|
963 |
|
---|
964 | for (p = v; p < g_cb->pos; p++) {
|
---|
965 | if ((p->type & (VF_ARRAY | VF_CHILD)) == VF_ARRAY) {
|
---|
966 | clear_array(iamarray(p));
|
---|
967 | free(p->x.array->items);
|
---|
968 | free(p->x.array);
|
---|
969 | }
|
---|
970 | if (p->type & VF_WALK) {
|
---|
971 | walker_list *n;
|
---|
972 | walker_list *w = p->x.walker;
|
---|
973 | debug_printf_walker("nvfree: freeing walker @%p\n", &p->x.walker);
|
---|
974 | p->x.walker = NULL;
|
---|
975 | while (w) {
|
---|
976 | n = w->prev;
|
---|
977 | debug_printf_walker(" free(%p)\n", w);
|
---|
978 | free(w);
|
---|
979 | w = n;
|
---|
980 | }
|
---|
981 | }
|
---|
982 | clrvar(p);
|
---|
983 | }
|
---|
984 |
|
---|
985 | g_cb->pos = v;
|
---|
986 | while (g_cb->prev && g_cb->pos == g_cb->nv) {
|
---|
987 | g_cb = g_cb->prev;
|
---|
988 | }
|
---|
989 | }
|
---|
990 |
|
---|
991 | /* ------- awk program text parsing ------- */
|
---|
992 |
|
---|
993 | /* Parse next token pointed by global pos, place results into global ttt.
|
---|
994 | * If token isn't expected, give away. Return token class
|
---|
995 | */
|
---|
996 | static uint32_t next_token(uint32_t expected)
|
---|
997 | {
|
---|
998 | #define concat_inserted (G.next_token__concat_inserted)
|
---|
999 | #define save_tclass (G.next_token__save_tclass)
|
---|
1000 | #define save_info (G.next_token__save_info)
|
---|
1001 | /* Initialized to TC_OPTERM: */
|
---|
1002 | #define ltclass (G.next_token__ltclass)
|
---|
1003 |
|
---|
1004 | char *p, *s;
|
---|
1005 | const char *tl;
|
---|
1006 | uint32_t tc;
|
---|
1007 | const uint32_t *ti;
|
---|
1008 |
|
---|
1009 | if (t_rollback) {
|
---|
1010 | t_rollback = FALSE;
|
---|
1011 |
|
---|
1012 | } else if (concat_inserted) {
|
---|
1013 | concat_inserted = FALSE;
|
---|
1014 | t_tclass = save_tclass;
|
---|
1015 | t_info = save_info;
|
---|
1016 |
|
---|
1017 | } else {
|
---|
1018 | p = g_pos;
|
---|
1019 | readnext:
|
---|
1020 | p = skip_spaces(p);
|
---|
1021 | g_lineno = t_lineno;
|
---|
1022 | if (*p == '#')
|
---|
1023 | while (*p != '\n' && *p != '\0')
|
---|
1024 | p++;
|
---|
1025 |
|
---|
1026 | if (*p == '\n')
|
---|
1027 | t_lineno++;
|
---|
1028 |
|
---|
1029 | if (*p == '\0') {
|
---|
1030 | tc = TC_EOF;
|
---|
1031 | debug_printf_parse("%s: token found: TC_EOF\n", __func__);
|
---|
1032 |
|
---|
1033 | } else if (*p == '\"') {
|
---|
1034 | /* it's a string */
|
---|
1035 | t_string = s = ++p;
|
---|
1036 | while (*p != '\"') {
|
---|
1037 | char *pp;
|
---|
1038 | if (*p == '\0' || *p == '\n')
|
---|
1039 | syntax_error(EMSG_UNEXP_EOS);
|
---|
1040 | pp = p;
|
---|
1041 | *s++ = nextchar(&pp);
|
---|
1042 | p = pp;
|
---|
1043 | }
|
---|
1044 | p++;
|
---|
1045 | *s = '\0';
|
---|
1046 | tc = TC_STRING;
|
---|
1047 | debug_printf_parse("%s: token found:'%s' TC_STRING\n", __func__, t_string);
|
---|
1048 |
|
---|
1049 | } else if ((expected & TC_REGEXP) && *p == '/') {
|
---|
1050 | /* it's regexp */
|
---|
1051 | t_string = s = ++p;
|
---|
1052 | while (*p != '/') {
|
---|
1053 | if (*p == '\0' || *p == '\n')
|
---|
1054 | syntax_error(EMSG_UNEXP_EOS);
|
---|
1055 | *s = *p++;
|
---|
1056 | if (*s++ == '\\') {
|
---|
1057 | char *pp = p;
|
---|
1058 | s[-1] = bb_process_escape_sequence((const char **)&pp);
|
---|
1059 | if (*p == '\\')
|
---|
1060 | *s++ = '\\';
|
---|
1061 | if (pp == p)
|
---|
1062 | *s++ = *p++;
|
---|
1063 | else
|
---|
1064 | p = pp;
|
---|
1065 | }
|
---|
1066 | }
|
---|
1067 | p++;
|
---|
1068 | *s = '\0';
|
---|
1069 | tc = TC_REGEXP;
|
---|
1070 | debug_printf_parse("%s: token found:'%s' TC_REGEXP\n", __func__, t_string);
|
---|
1071 |
|
---|
1072 | } else if (*p == '.' || isdigit(*p)) {
|
---|
1073 | /* it's a number */
|
---|
1074 | char *pp = p;
|
---|
1075 | t_double = my_strtod(&pp);
|
---|
1076 | p = pp;
|
---|
1077 | if (*p == '.')
|
---|
1078 | syntax_error(EMSG_UNEXP_TOKEN);
|
---|
1079 | tc = TC_NUMBER;
|
---|
1080 | debug_printf_parse("%s: token found:%f TC_NUMBER\n", __func__, t_double);
|
---|
1081 |
|
---|
1082 | } else {
|
---|
1083 | /* search for something known */
|
---|
1084 | tl = tokenlist;
|
---|
1085 | tc = 0x00000001;
|
---|
1086 | ti = tokeninfo;
|
---|
1087 | while (*tl) {
|
---|
1088 | int l = (unsigned char) *tl++;
|
---|
1089 | if (l == (unsigned char) NTCC) {
|
---|
1090 | tc <<= 1;
|
---|
1091 | continue;
|
---|
1092 | }
|
---|
1093 | /* if token class is expected,
|
---|
1094 | * token matches,
|
---|
1095 | * and it's not a longer word,
|
---|
1096 | */
|
---|
1097 | if ((tc & (expected | TC_WORD | TC_NEWLINE))
|
---|
1098 | && strncmp(p, tl, l) == 0
|
---|
1099 | && !((tc & TC_WORD) && isalnum_(p[l]))
|
---|
1100 | ) {
|
---|
1101 | /* then this is what we are looking for */
|
---|
1102 | t_info = *ti;
|
---|
1103 | debug_printf_parse("%s: token found:'%.*s' t_info:%x\n", __func__, l, p, t_info);
|
---|
1104 | p += l;
|
---|
1105 | goto token_found;
|
---|
1106 | }
|
---|
1107 | ti++;
|
---|
1108 | tl += l;
|
---|
1109 | }
|
---|
1110 | /* not a known token */
|
---|
1111 |
|
---|
1112 | /* is it a name? (var/array/function) */
|
---|
1113 | if (!isalnum_(*p))
|
---|
1114 | syntax_error(EMSG_UNEXP_TOKEN); /* no */
|
---|
1115 | /* yes */
|
---|
1116 | t_string = --p;
|
---|
1117 | while (isalnum_(*++p)) {
|
---|
1118 | p[-1] = *p;
|
---|
1119 | }
|
---|
1120 | p[-1] = '\0';
|
---|
1121 | tc = TC_VARIABLE;
|
---|
1122 | /* also consume whitespace between functionname and bracket */
|
---|
1123 | if (!(expected & TC_VARIABLE) || (expected & TC_ARRAY))
|
---|
1124 | p = skip_spaces(p);
|
---|
1125 | if (*p == '(') {
|
---|
1126 | tc = TC_FUNCTION;
|
---|
1127 | debug_printf_parse("%s: token found:'%s' TC_FUNCTION\n", __func__, t_string);
|
---|
1128 | } else {
|
---|
1129 | if (*p == '[') {
|
---|
1130 | p++;
|
---|
1131 | tc = TC_ARRAY;
|
---|
1132 | debug_printf_parse("%s: token found:'%s' TC_ARRAY\n", __func__, t_string);
|
---|
1133 | } else
|
---|
1134 | debug_printf_parse("%s: token found:'%s' TC_VARIABLE\n", __func__, t_string);
|
---|
1135 | }
|
---|
1136 | }
|
---|
1137 | token_found:
|
---|
1138 | g_pos = p;
|
---|
1139 |
|
---|
1140 | /* skipping newlines in some cases */
|
---|
1141 | if ((ltclass & TC_NOTERM) && (tc & TC_NEWLINE))
|
---|
1142 | goto readnext;
|
---|
1143 |
|
---|
1144 | /* insert concatenation operator when needed */
|
---|
1145 | if ((ltclass & TC_CONCAT1) && (tc & TC_CONCAT2) && (expected & TC_BINOP)) {
|
---|
1146 | concat_inserted = TRUE;
|
---|
1147 | save_tclass = tc;
|
---|
1148 | save_info = t_info;
|
---|
1149 | tc = TC_BINOP;
|
---|
1150 | t_info = OC_CONCAT | SS | P(35);
|
---|
1151 | }
|
---|
1152 |
|
---|
1153 | t_tclass = tc;
|
---|
1154 | }
|
---|
1155 | ltclass = t_tclass;
|
---|
1156 |
|
---|
1157 | /* Are we ready for this? */
|
---|
1158 | if (!(ltclass & expected))
|
---|
1159 | syntax_error((ltclass & (TC_NEWLINE | TC_EOF)) ?
|
---|
1160 | EMSG_UNEXP_EOS : EMSG_UNEXP_TOKEN);
|
---|
1161 |
|
---|
1162 | return ltclass;
|
---|
1163 | #undef concat_inserted
|
---|
1164 | #undef save_tclass
|
---|
1165 | #undef save_info
|
---|
1166 | #undef ltclass
|
---|
1167 | }
|
---|
1168 |
|
---|
1169 | static void rollback_token(void)
|
---|
1170 | {
|
---|
1171 | t_rollback = TRUE;
|
---|
1172 | }
|
---|
1173 |
|
---|
1174 | static node *new_node(uint32_t info)
|
---|
1175 | {
|
---|
1176 | node *n;
|
---|
1177 |
|
---|
1178 | n = xzalloc(sizeof(node));
|
---|
1179 | n->info = info;
|
---|
1180 | n->lineno = g_lineno;
|
---|
1181 | return n;
|
---|
1182 | }
|
---|
1183 |
|
---|
1184 | static void mk_re_node(const char *s, node *n, regex_t *re)
|
---|
1185 | {
|
---|
1186 | n->info = OC_REGEXP;
|
---|
1187 | n->l.re = re;
|
---|
1188 | n->r.ire = re + 1;
|
---|
1189 | xregcomp(re, s, REG_EXTENDED);
|
---|
1190 | xregcomp(re + 1, s, REG_EXTENDED | REG_ICASE);
|
---|
1191 | }
|
---|
1192 |
|
---|
1193 | static node *condition(void)
|
---|
1194 | {
|
---|
1195 | next_token(TC_SEQSTART);
|
---|
1196 | return parse_expr(TC_SEQTERM);
|
---|
1197 | }
|
---|
1198 |
|
---|
1199 | /* parse expression terminated by given argument, return ptr
|
---|
1200 | * to built subtree. Terminator is eaten by parse_expr */
|
---|
1201 | static node *parse_expr(uint32_t iexp)
|
---|
1202 | {
|
---|
1203 | node sn;
|
---|
1204 | node *cn = &sn;
|
---|
1205 | node *vn, *glptr;
|
---|
1206 | uint32_t tc, xtc;
|
---|
1207 | var *v;
|
---|
1208 |
|
---|
1209 | debug_printf_parse("%s(%x)\n", __func__, iexp);
|
---|
1210 |
|
---|
1211 | sn.info = PRIMASK;
|
---|
1212 | sn.r.n = glptr = NULL;
|
---|
1213 | xtc = TC_OPERAND | TC_UOPPRE | TC_REGEXP | iexp;
|
---|
1214 |
|
---|
1215 | while (!((tc = next_token(xtc)) & iexp)) {
|
---|
1216 |
|
---|
1217 | if (glptr && (t_info == (OC_COMPARE | VV | P(39) | 2))) {
|
---|
1218 | /* input redirection (<) attached to glptr node */
|
---|
1219 | debug_printf_parse("%s: input redir\n", __func__);
|
---|
1220 | cn = glptr->l.n = new_node(OC_CONCAT | SS | P(37));
|
---|
1221 | cn->a.n = glptr;
|
---|
1222 | xtc = TC_OPERAND | TC_UOPPRE;
|
---|
1223 | glptr = NULL;
|
---|
1224 |
|
---|
1225 | } else if (tc & (TC_BINOP | TC_UOPPOST)) {
|
---|
1226 | debug_printf_parse("%s: TC_BINOP | TC_UOPPOST\n", __func__);
|
---|
1227 | /* for binary and postfix-unary operators, jump back over
|
---|
1228 | * previous operators with higher priority */
|
---|
1229 | vn = cn;
|
---|
1230 | while (((t_info & PRIMASK) > (vn->a.n->info & PRIMASK2))
|
---|
1231 | || ((t_info == vn->info) && ((t_info & OPCLSMASK) == OC_COLON))
|
---|
1232 | ) {
|
---|
1233 | vn = vn->a.n;
|
---|
1234 | }
|
---|
1235 | if ((t_info & OPCLSMASK) == OC_TERNARY)
|
---|
1236 | t_info += P(6);
|
---|
1237 | cn = vn->a.n->r.n = new_node(t_info);
|
---|
1238 | cn->a.n = vn->a.n;
|
---|
1239 | if (tc & TC_BINOP) {
|
---|
1240 | cn->l.n = vn;
|
---|
1241 | xtc = TC_OPERAND | TC_UOPPRE | TC_REGEXP;
|
---|
1242 | if ((t_info & OPCLSMASK) == OC_PGETLINE) {
|
---|
1243 | /* it's a pipe */
|
---|
1244 | next_token(TC_GETLINE);
|
---|
1245 | /* give maximum priority to this pipe */
|
---|
1246 | cn->info &= ~PRIMASK;
|
---|
1247 | xtc = TC_OPERAND | TC_UOPPRE | TC_BINOP | iexp;
|
---|
1248 | }
|
---|
1249 | } else {
|
---|
1250 | cn->r.n = vn;
|
---|
1251 | xtc = TC_OPERAND | TC_UOPPRE | TC_BINOP | iexp;
|
---|
1252 | }
|
---|
1253 | vn->a.n = cn;
|
---|
1254 |
|
---|
1255 | } else {
|
---|
1256 | debug_printf_parse("%s: other\n", __func__);
|
---|
1257 | /* for operands and prefix-unary operators, attach them
|
---|
1258 | * to last node */
|
---|
1259 | vn = cn;
|
---|
1260 | cn = vn->r.n = new_node(t_info);
|
---|
1261 | cn->a.n = vn;
|
---|
1262 | xtc = TC_OPERAND | TC_UOPPRE | TC_REGEXP;
|
---|
1263 | if (tc & (TC_OPERAND | TC_REGEXP)) {
|
---|
1264 | debug_printf_parse("%s: TC_OPERAND | TC_REGEXP\n", __func__);
|
---|
1265 | xtc = TC_UOPPRE | TC_UOPPOST | TC_BINOP | TC_OPERAND | iexp;
|
---|
1266 | /* one should be very careful with switch on tclass -
|
---|
1267 | * only simple tclasses should be used! */
|
---|
1268 | switch (tc) {
|
---|
1269 | case TC_VARIABLE:
|
---|
1270 | case TC_ARRAY:
|
---|
1271 | debug_printf_parse("%s: TC_VARIABLE | TC_ARRAY\n", __func__);
|
---|
1272 | cn->info = OC_VAR;
|
---|
1273 | v = hash_search(ahash, t_string);
|
---|
1274 | if (v != NULL) {
|
---|
1275 | cn->info = OC_FNARG;
|
---|
1276 | cn->l.aidx = v->x.aidx;
|
---|
1277 | } else {
|
---|
1278 | cn->l.v = newvar(t_string);
|
---|
1279 | }
|
---|
1280 | if (tc & TC_ARRAY) {
|
---|
1281 | cn->info |= xS;
|
---|
1282 | cn->r.n = parse_expr(TC_ARRTERM);
|
---|
1283 | }
|
---|
1284 | break;
|
---|
1285 |
|
---|
1286 | case TC_NUMBER:
|
---|
1287 | case TC_STRING:
|
---|
1288 | debug_printf_parse("%s: TC_NUMBER | TC_STRING\n", __func__);
|
---|
1289 | cn->info = OC_VAR;
|
---|
1290 | v = cn->l.v = xzalloc(sizeof(var));
|
---|
1291 | if (tc & TC_NUMBER)
|
---|
1292 | setvar_i(v, t_double);
|
---|
1293 | else
|
---|
1294 | setvar_s(v, t_string);
|
---|
1295 | break;
|
---|
1296 |
|
---|
1297 | case TC_REGEXP:
|
---|
1298 | debug_printf_parse("%s: TC_REGEXP\n", __func__);
|
---|
1299 | mk_re_node(t_string, cn, xzalloc(sizeof(regex_t)*2));
|
---|
1300 | break;
|
---|
1301 |
|
---|
1302 | case TC_FUNCTION:
|
---|
1303 | debug_printf_parse("%s: TC_FUNCTION\n", __func__);
|
---|
1304 | cn->info = OC_FUNC;
|
---|
1305 | cn->r.f = newfunc(t_string);
|
---|
1306 | cn->l.n = condition();
|
---|
1307 | break;
|
---|
1308 |
|
---|
1309 | case TC_SEQSTART:
|
---|
1310 | debug_printf_parse("%s: TC_SEQSTART\n", __func__);
|
---|
1311 | cn = vn->r.n = parse_expr(TC_SEQTERM);
|
---|
1312 | if (!cn)
|
---|
1313 | syntax_error("Empty sequence");
|
---|
1314 | cn->a.n = vn;
|
---|
1315 | break;
|
---|
1316 |
|
---|
1317 | case TC_GETLINE:
|
---|
1318 | debug_printf_parse("%s: TC_GETLINE\n", __func__);
|
---|
1319 | glptr = cn;
|
---|
1320 | xtc = TC_OPERAND | TC_UOPPRE | TC_BINOP | iexp;
|
---|
1321 | break;
|
---|
1322 |
|
---|
1323 | case TC_BUILTIN:
|
---|
1324 | debug_printf_parse("%s: TC_BUILTIN\n", __func__);
|
---|
1325 | cn->l.n = condition();
|
---|
1326 | break;
|
---|
1327 | }
|
---|
1328 | }
|
---|
1329 | }
|
---|
1330 | }
|
---|
1331 |
|
---|
1332 | debug_printf_parse("%s() returns %p\n", __func__, sn.r.n);
|
---|
1333 | return sn.r.n;
|
---|
1334 | }
|
---|
1335 |
|
---|
1336 | /* add node to chain. Return ptr to alloc'd node */
|
---|
1337 | static node *chain_node(uint32_t info)
|
---|
1338 | {
|
---|
1339 | node *n;
|
---|
1340 |
|
---|
1341 | if (!seq->first)
|
---|
1342 | seq->first = seq->last = new_node(0);
|
---|
1343 |
|
---|
1344 | if (seq->programname != g_progname) {
|
---|
1345 | seq->programname = g_progname;
|
---|
1346 | n = chain_node(OC_NEWSOURCE);
|
---|
1347 | n->l.new_progname = xstrdup(g_progname);
|
---|
1348 | }
|
---|
1349 |
|
---|
1350 | n = seq->last;
|
---|
1351 | n->info = info;
|
---|
1352 | seq->last = n->a.n = new_node(OC_DONE);
|
---|
1353 |
|
---|
1354 | return n;
|
---|
1355 | }
|
---|
1356 |
|
---|
1357 | static void chain_expr(uint32_t info)
|
---|
1358 | {
|
---|
1359 | node *n;
|
---|
1360 |
|
---|
1361 | n = chain_node(info);
|
---|
1362 | n->l.n = parse_expr(TC_OPTERM | TC_GRPTERM);
|
---|
1363 | if (t_tclass & TC_GRPTERM)
|
---|
1364 | rollback_token();
|
---|
1365 | }
|
---|
1366 |
|
---|
1367 | static node *chain_loop(node *nn)
|
---|
1368 | {
|
---|
1369 | node *n, *n2, *save_brk, *save_cont;
|
---|
1370 |
|
---|
1371 | save_brk = break_ptr;
|
---|
1372 | save_cont = continue_ptr;
|
---|
1373 |
|
---|
1374 | n = chain_node(OC_BR | Vx);
|
---|
1375 | continue_ptr = new_node(OC_EXEC);
|
---|
1376 | break_ptr = new_node(OC_EXEC);
|
---|
1377 | chain_group();
|
---|
1378 | n2 = chain_node(OC_EXEC | Vx);
|
---|
1379 | n2->l.n = nn;
|
---|
1380 | n2->a.n = n;
|
---|
1381 | continue_ptr->a.n = n2;
|
---|
1382 | break_ptr->a.n = n->r.n = seq->last;
|
---|
1383 |
|
---|
1384 | continue_ptr = save_cont;
|
---|
1385 | break_ptr = save_brk;
|
---|
1386 |
|
---|
1387 | return n;
|
---|
1388 | }
|
---|
1389 |
|
---|
1390 | /* parse group and attach it to chain */
|
---|
1391 | static void chain_group(void)
|
---|
1392 | {
|
---|
1393 | uint32_t c;
|
---|
1394 | node *n, *n2, *n3;
|
---|
1395 |
|
---|
1396 | do {
|
---|
1397 | c = next_token(TC_GRPSEQ);
|
---|
1398 | } while (c & TC_NEWLINE);
|
---|
1399 |
|
---|
1400 | if (c & TC_GRPSTART) {
|
---|
1401 | debug_printf_parse("%s: TC_GRPSTART\n", __func__);
|
---|
1402 | while (next_token(TC_GRPSEQ | TC_GRPTERM) != TC_GRPTERM) {
|
---|
1403 | debug_printf_parse("%s: !TC_GRPTERM\n", __func__);
|
---|
1404 | if (t_tclass & TC_NEWLINE)
|
---|
1405 | continue;
|
---|
1406 | rollback_token();
|
---|
1407 | chain_group();
|
---|
1408 | }
|
---|
1409 | debug_printf_parse("%s: TC_GRPTERM\n", __func__);
|
---|
1410 | } else if (c & (TC_OPSEQ | TC_OPTERM)) {
|
---|
1411 | debug_printf_parse("%s: TC_OPSEQ | TC_OPTERM\n", __func__);
|
---|
1412 | rollback_token();
|
---|
1413 | chain_expr(OC_EXEC | Vx);
|
---|
1414 | } else {
|
---|
1415 | /* TC_STATEMNT */
|
---|
1416 | debug_printf_parse("%s: TC_STATEMNT(?)\n", __func__);
|
---|
1417 | switch (t_info & OPCLSMASK) {
|
---|
1418 | case ST_IF:
|
---|
1419 | debug_printf_parse("%s: ST_IF\n", __func__);
|
---|
1420 | n = chain_node(OC_BR | Vx);
|
---|
1421 | n->l.n = condition();
|
---|
1422 | chain_group();
|
---|
1423 | n2 = chain_node(OC_EXEC);
|
---|
1424 | n->r.n = seq->last;
|
---|
1425 | if (next_token(TC_GRPSEQ | TC_GRPTERM | TC_ELSE) == TC_ELSE) {
|
---|
1426 | chain_group();
|
---|
1427 | n2->a.n = seq->last;
|
---|
1428 | } else {
|
---|
1429 | rollback_token();
|
---|
1430 | }
|
---|
1431 | break;
|
---|
1432 |
|
---|
1433 | case ST_WHILE:
|
---|
1434 | debug_printf_parse("%s: ST_WHILE\n", __func__);
|
---|
1435 | n2 = condition();
|
---|
1436 | n = chain_loop(NULL);
|
---|
1437 | n->l.n = n2;
|
---|
1438 | break;
|
---|
1439 |
|
---|
1440 | case ST_DO:
|
---|
1441 | debug_printf_parse("%s: ST_DO\n", __func__);
|
---|
1442 | n2 = chain_node(OC_EXEC);
|
---|
1443 | n = chain_loop(NULL);
|
---|
1444 | n2->a.n = n->a.n;
|
---|
1445 | next_token(TC_WHILE);
|
---|
1446 | n->l.n = condition();
|
---|
1447 | break;
|
---|
1448 |
|
---|
1449 | case ST_FOR:
|
---|
1450 | debug_printf_parse("%s: ST_FOR\n", __func__);
|
---|
1451 | next_token(TC_SEQSTART);
|
---|
1452 | n2 = parse_expr(TC_SEMICOL | TC_SEQTERM);
|
---|
1453 | if (t_tclass & TC_SEQTERM) { /* for-in */
|
---|
1454 | if ((n2->info & OPCLSMASK) != OC_IN)
|
---|
1455 | syntax_error(EMSG_UNEXP_TOKEN);
|
---|
1456 | n = chain_node(OC_WALKINIT | VV);
|
---|
1457 | n->l.n = n2->l.n;
|
---|
1458 | n->r.n = n2->r.n;
|
---|
1459 | n = chain_loop(NULL);
|
---|
1460 | n->info = OC_WALKNEXT | Vx;
|
---|
1461 | n->l.n = n2->l.n;
|
---|
1462 | } else { /* for (;;) */
|
---|
1463 | n = chain_node(OC_EXEC | Vx);
|
---|
1464 | n->l.n = n2;
|
---|
1465 | n2 = parse_expr(TC_SEMICOL);
|
---|
1466 | n3 = parse_expr(TC_SEQTERM);
|
---|
1467 | n = chain_loop(n3);
|
---|
1468 | n->l.n = n2;
|
---|
1469 | if (!n2)
|
---|
1470 | n->info = OC_EXEC;
|
---|
1471 | }
|
---|
1472 | break;
|
---|
1473 |
|
---|
1474 | case OC_PRINT:
|
---|
1475 | case OC_PRINTF:
|
---|
1476 | debug_printf_parse("%s: OC_PRINT[F]\n", __func__);
|
---|
1477 | n = chain_node(t_info);
|
---|
1478 | n->l.n = parse_expr(TC_OPTERM | TC_OUTRDR | TC_GRPTERM);
|
---|
1479 | if (t_tclass & TC_OUTRDR) {
|
---|
1480 | n->info |= t_info;
|
---|
1481 | n->r.n = parse_expr(TC_OPTERM | TC_GRPTERM);
|
---|
1482 | }
|
---|
1483 | if (t_tclass & TC_GRPTERM)
|
---|
1484 | rollback_token();
|
---|
1485 | break;
|
---|
1486 |
|
---|
1487 | case OC_BREAK:
|
---|
1488 | debug_printf_parse("%s: OC_BREAK\n", __func__);
|
---|
1489 | n = chain_node(OC_EXEC);
|
---|
1490 | n->a.n = break_ptr;
|
---|
1491 | break;
|
---|
1492 |
|
---|
1493 | case OC_CONTINUE:
|
---|
1494 | debug_printf_parse("%s: OC_CONTINUE\n", __func__);
|
---|
1495 | n = chain_node(OC_EXEC);
|
---|
1496 | n->a.n = continue_ptr;
|
---|
1497 | break;
|
---|
1498 |
|
---|
1499 | /* delete, next, nextfile, return, exit */
|
---|
1500 | default:
|
---|
1501 | debug_printf_parse("%s: default\n", __func__);
|
---|
1502 | chain_expr(t_info);
|
---|
1503 | }
|
---|
1504 | }
|
---|
1505 | }
|
---|
1506 |
|
---|
1507 | static void parse_program(char *p)
|
---|
1508 | {
|
---|
1509 | uint32_t tclass;
|
---|
1510 | node *cn;
|
---|
1511 | func *f;
|
---|
1512 | var *v;
|
---|
1513 |
|
---|
1514 | g_pos = p;
|
---|
1515 | t_lineno = 1;
|
---|
1516 | while ((tclass = next_token(TC_EOF | TC_OPSEQ | TC_GRPSTART |
|
---|
1517 | TC_OPTERM | TC_BEGIN | TC_END | TC_FUNCDECL)) != TC_EOF) {
|
---|
1518 |
|
---|
1519 | if (tclass & TC_OPTERM) {
|
---|
1520 | debug_printf_parse("%s: TC_OPTERM\n", __func__);
|
---|
1521 | continue;
|
---|
1522 | }
|
---|
1523 |
|
---|
1524 | seq = &mainseq;
|
---|
1525 | if (tclass & TC_BEGIN) {
|
---|
1526 | debug_printf_parse("%s: TC_BEGIN\n", __func__);
|
---|
1527 | seq = &beginseq;
|
---|
1528 | chain_group();
|
---|
1529 |
|
---|
1530 | } else if (tclass & TC_END) {
|
---|
1531 | debug_printf_parse("%s: TC_END\n", __func__);
|
---|
1532 | seq = &endseq;
|
---|
1533 | chain_group();
|
---|
1534 |
|
---|
1535 | } else if (tclass & TC_FUNCDECL) {
|
---|
1536 | debug_printf_parse("%s: TC_FUNCDECL\n", __func__);
|
---|
1537 | next_token(TC_FUNCTION);
|
---|
1538 | g_pos++;
|
---|
1539 | f = newfunc(t_string);
|
---|
1540 | f->body.first = NULL;
|
---|
1541 | f->nargs = 0;
|
---|
1542 | while (next_token(TC_VARIABLE | TC_SEQTERM) & TC_VARIABLE) {
|
---|
1543 | v = findvar(ahash, t_string);
|
---|
1544 | v->x.aidx = f->nargs++;
|
---|
1545 |
|
---|
1546 | if (next_token(TC_COMMA | TC_SEQTERM) & TC_SEQTERM)
|
---|
1547 | break;
|
---|
1548 | }
|
---|
1549 | seq = &f->body;
|
---|
1550 | chain_group();
|
---|
1551 | clear_array(ahash);
|
---|
1552 |
|
---|
1553 | } else if (tclass & TC_OPSEQ) {
|
---|
1554 | debug_printf_parse("%s: TC_OPSEQ\n", __func__);
|
---|
1555 | rollback_token();
|
---|
1556 | cn = chain_node(OC_TEST);
|
---|
1557 | cn->l.n = parse_expr(TC_OPTERM | TC_EOF | TC_GRPSTART);
|
---|
1558 | if (t_tclass & TC_GRPSTART) {
|
---|
1559 | debug_printf_parse("%s: TC_GRPSTART\n", __func__);
|
---|
1560 | rollback_token();
|
---|
1561 | chain_group();
|
---|
1562 | } else {
|
---|
1563 | debug_printf_parse("%s: !TC_GRPSTART\n", __func__);
|
---|
1564 | chain_node(OC_PRINT);
|
---|
1565 | }
|
---|
1566 | cn->r.n = mainseq.last;
|
---|
1567 |
|
---|
1568 | } else /* if (tclass & TC_GRPSTART) */ {
|
---|
1569 | debug_printf_parse("%s: TC_GRPSTART(?)\n", __func__);
|
---|
1570 | rollback_token();
|
---|
1571 | chain_group();
|
---|
1572 | }
|
---|
1573 | }
|
---|
1574 | debug_printf_parse("%s: TC_EOF\n", __func__);
|
---|
1575 | }
|
---|
1576 |
|
---|
1577 |
|
---|
1578 | /* -------- program execution part -------- */
|
---|
1579 |
|
---|
1580 | static node *mk_splitter(const char *s, tsplitter *spl)
|
---|
1581 | {
|
---|
1582 | regex_t *re, *ire;
|
---|
1583 | node *n;
|
---|
1584 |
|
---|
1585 | re = &spl->re[0];
|
---|
1586 | ire = &spl->re[1];
|
---|
1587 | n = &spl->n;
|
---|
1588 | if ((n->info & OPCLSMASK) == OC_REGEXP) {
|
---|
1589 | regfree(re);
|
---|
1590 | regfree(ire); // TODO: nuke ire, use re+1?
|
---|
1591 | }
|
---|
1592 | if (s[0] && s[1]) { /* strlen(s) > 1 */
|
---|
1593 | mk_re_node(s, n, re);
|
---|
1594 | } else {
|
---|
1595 | n->info = (uint32_t) s[0];
|
---|
1596 | }
|
---|
1597 |
|
---|
1598 | return n;
|
---|
1599 | }
|
---|
1600 |
|
---|
1601 | /* use node as a regular expression. Supplied with node ptr and regex_t
|
---|
1602 | * storage space. Return ptr to regex (if result points to preg, it should
|
---|
1603 | * be later regfree'd manually
|
---|
1604 | */
|
---|
1605 | static regex_t *as_regex(node *op, regex_t *preg)
|
---|
1606 | {
|
---|
1607 | int cflags;
|
---|
1608 | var *v;
|
---|
1609 | const char *s;
|
---|
1610 |
|
---|
1611 | if ((op->info & OPCLSMASK) == OC_REGEXP) {
|
---|
1612 | return icase ? op->r.ire : op->l.re;
|
---|
1613 | }
|
---|
1614 | v = nvalloc(1);
|
---|
1615 | s = getvar_s(evaluate(op, v));
|
---|
1616 |
|
---|
1617 | cflags = icase ? REG_EXTENDED | REG_ICASE : REG_EXTENDED;
|
---|
1618 | /* Testcase where REG_EXTENDED fails (unpaired '{'):
|
---|
1619 | * echo Hi | awk 'gsub("@(samp|code|file)\{","");'
|
---|
1620 | * gawk 3.1.5 eats this. We revert to ~REG_EXTENDED
|
---|
1621 | * (maybe gsub is not supposed to use REG_EXTENDED?).
|
---|
1622 | */
|
---|
1623 | if (regcomp(preg, s, cflags)) {
|
---|
1624 | cflags &= ~REG_EXTENDED;
|
---|
1625 | xregcomp(preg, s, cflags);
|
---|
1626 | }
|
---|
1627 | nvfree(v);
|
---|
1628 | return preg;
|
---|
1629 | }
|
---|
1630 |
|
---|
1631 | /* gradually increasing buffer.
|
---|
1632 | * note that we reallocate even if n == old_size,
|
---|
1633 | * and thus there is at least one extra allocated byte.
|
---|
1634 | */
|
---|
1635 | static char* qrealloc(char *b, int n, int *size)
|
---|
1636 | {
|
---|
1637 | if (!b || n >= *size) {
|
---|
1638 | *size = n + (n>>1) + 80;
|
---|
1639 | b = xrealloc(b, *size);
|
---|
1640 | }
|
---|
1641 | return b;
|
---|
1642 | }
|
---|
1643 |
|
---|
1644 | /* resize field storage space */
|
---|
1645 | static void fsrealloc(int size)
|
---|
1646 | {
|
---|
1647 | int i;
|
---|
1648 |
|
---|
1649 | if (size >= maxfields) {
|
---|
1650 | i = maxfields;
|
---|
1651 | maxfields = size + 16;
|
---|
1652 | Fields = xrealloc(Fields, maxfields * sizeof(Fields[0]));
|
---|
1653 | for (; i < maxfields; i++) {
|
---|
1654 | Fields[i].type = VF_SPECIAL;
|
---|
1655 | Fields[i].string = NULL;
|
---|
1656 | }
|
---|
1657 | }
|
---|
1658 | /* if size < nfields, clear extra field variables */
|
---|
1659 | for (i = size; i < nfields; i++) {
|
---|
1660 | clrvar(Fields + i);
|
---|
1661 | }
|
---|
1662 | nfields = size;
|
---|
1663 | }
|
---|
1664 |
|
---|
1665 | static int awk_split(const char *s, node *spl, char **slist)
|
---|
1666 | {
|
---|
1667 | int l, n;
|
---|
1668 | char c[4];
|
---|
1669 | char *s1;
|
---|
1670 | regmatch_t pmatch[2]; // TODO: why [2]? [1] is enough...
|
---|
1671 |
|
---|
1672 | /* in worst case, each char would be a separate field */
|
---|
1673 | *slist = s1 = xzalloc(strlen(s) * 2 + 3);
|
---|
1674 | strcpy(s1, s);
|
---|
1675 |
|
---|
1676 | c[0] = c[1] = (char)spl->info;
|
---|
1677 | c[2] = c[3] = '\0';
|
---|
1678 | if (*getvar_s(intvar[RS]) == '\0')
|
---|
1679 | c[2] = '\n';
|
---|
1680 |
|
---|
1681 | n = 0;
|
---|
1682 | if ((spl->info & OPCLSMASK) == OC_REGEXP) { /* regex split */
|
---|
1683 | if (!*s)
|
---|
1684 | return n; /* "": zero fields */
|
---|
1685 | n++; /* at least one field will be there */
|
---|
1686 | do {
|
---|
1687 | l = strcspn(s, c+2); /* len till next NUL or \n */
|
---|
1688 | if (regexec(icase ? spl->r.ire : spl->l.re, s, 1, pmatch, 0) == 0
|
---|
1689 | && pmatch[0].rm_so <= l
|
---|
1690 | ) {
|
---|
1691 | l = pmatch[0].rm_so;
|
---|
1692 | if (pmatch[0].rm_eo == 0) {
|
---|
1693 | l++;
|
---|
1694 | pmatch[0].rm_eo++;
|
---|
1695 | }
|
---|
1696 | n++; /* we saw yet another delimiter */
|
---|
1697 | } else {
|
---|
1698 | pmatch[0].rm_eo = l;
|
---|
1699 | if (s[l])
|
---|
1700 | pmatch[0].rm_eo++;
|
---|
1701 | }
|
---|
1702 | memcpy(s1, s, l);
|
---|
1703 | /* make sure we remove *all* of the separator chars */
|
---|
1704 | do {
|
---|
1705 | s1[l] = '\0';
|
---|
1706 | } while (++l < pmatch[0].rm_eo);
|
---|
1707 | nextword(&s1);
|
---|
1708 | s += pmatch[0].rm_eo;
|
---|
1709 | } while (*s);
|
---|
1710 | return n;
|
---|
1711 | }
|
---|
1712 | if (c[0] == '\0') { /* null split */
|
---|
1713 | while (*s) {
|
---|
1714 | *s1++ = *s++;
|
---|
1715 | *s1++ = '\0';
|
---|
1716 | n++;
|
---|
1717 | }
|
---|
1718 | return n;
|
---|
1719 | }
|
---|
1720 | if (c[0] != ' ') { /* single-character split */
|
---|
1721 | if (icase) {
|
---|
1722 | c[0] = toupper(c[0]);
|
---|
1723 | c[1] = tolower(c[1]);
|
---|
1724 | }
|
---|
1725 | if (*s1)
|
---|
1726 | n++;
|
---|
1727 | while ((s1 = strpbrk(s1, c)) != NULL) {
|
---|
1728 | *s1++ = '\0';
|
---|
1729 | n++;
|
---|
1730 | }
|
---|
1731 | return n;
|
---|
1732 | }
|
---|
1733 | /* space split */
|
---|
1734 | while (*s) {
|
---|
1735 | s = skip_whitespace(s);
|
---|
1736 | if (!*s)
|
---|
1737 | break;
|
---|
1738 | n++;
|
---|
1739 | while (*s && !isspace(*s))
|
---|
1740 | *s1++ = *s++;
|
---|
1741 | *s1++ = '\0';
|
---|
1742 | }
|
---|
1743 | return n;
|
---|
1744 | }
|
---|
1745 |
|
---|
1746 | static void split_f0(void)
|
---|
1747 | {
|
---|
1748 | /* static char *fstrings; */
|
---|
1749 | #define fstrings (G.split_f0__fstrings)
|
---|
1750 |
|
---|
1751 | int i, n;
|
---|
1752 | char *s;
|
---|
1753 |
|
---|
1754 | if (is_f0_split)
|
---|
1755 | return;
|
---|
1756 |
|
---|
1757 | is_f0_split = TRUE;
|
---|
1758 | free(fstrings);
|
---|
1759 | fsrealloc(0);
|
---|
1760 | n = awk_split(getvar_s(intvar[F0]), &fsplitter.n, &fstrings);
|
---|
1761 | fsrealloc(n);
|
---|
1762 | s = fstrings;
|
---|
1763 | for (i = 0; i < n; i++) {
|
---|
1764 | Fields[i].string = nextword(&s);
|
---|
1765 | Fields[i].type |= (VF_FSTR | VF_USER | VF_DIRTY);
|
---|
1766 | }
|
---|
1767 |
|
---|
1768 | /* set NF manually to avoid side effects */
|
---|
1769 | clrvar(intvar[NF]);
|
---|
1770 | intvar[NF]->type = VF_NUMBER | VF_SPECIAL;
|
---|
1771 | intvar[NF]->number = nfields;
|
---|
1772 | #undef fstrings
|
---|
1773 | }
|
---|
1774 |
|
---|
1775 | /* perform additional actions when some internal variables changed */
|
---|
1776 | static void handle_special(var *v)
|
---|
1777 | {
|
---|
1778 | int n;
|
---|
1779 | char *b;
|
---|
1780 | const char *sep, *s;
|
---|
1781 | int sl, l, len, i, bsize;
|
---|
1782 |
|
---|
1783 | if (!(v->type & VF_SPECIAL))
|
---|
1784 | return;
|
---|
1785 |
|
---|
1786 | if (v == intvar[NF]) {
|
---|
1787 | n = (int)getvar_i(v);
|
---|
1788 | fsrealloc(n);
|
---|
1789 |
|
---|
1790 | /* recalculate $0 */
|
---|
1791 | sep = getvar_s(intvar[OFS]);
|
---|
1792 | sl = strlen(sep);
|
---|
1793 | b = NULL;
|
---|
1794 | len = 0;
|
---|
1795 | for (i = 0; i < n; i++) {
|
---|
1796 | s = getvar_s(&Fields[i]);
|
---|
1797 | l = strlen(s);
|
---|
1798 | if (b) {
|
---|
1799 | memcpy(b+len, sep, sl);
|
---|
1800 | len += sl;
|
---|
1801 | }
|
---|
1802 | b = qrealloc(b, len+l+sl, &bsize);
|
---|
1803 | memcpy(b+len, s, l);
|
---|
1804 | len += l;
|
---|
1805 | }
|
---|
1806 | if (b)
|
---|
1807 | b[len] = '\0';
|
---|
1808 | setvar_p(intvar[F0], b);
|
---|
1809 | is_f0_split = TRUE;
|
---|
1810 |
|
---|
1811 | } else if (v == intvar[F0]) {
|
---|
1812 | is_f0_split = FALSE;
|
---|
1813 |
|
---|
1814 | } else if (v == intvar[FS]) {
|
---|
1815 | /*
|
---|
1816 | * The POSIX-2008 standard says that changing FS should have no effect on the
|
---|
1817 | * current input line, but only on the next one. The language is:
|
---|
1818 | *
|
---|
1819 | * > Before the first reference to a field in the record is evaluated, the record
|
---|
1820 | * > shall be split into fields, according to the rules in Regular Expressions,
|
---|
1821 | * > using the value of FS that was current at the time the record was read.
|
---|
1822 | *
|
---|
1823 | * So, split up current line before assignment to FS:
|
---|
1824 | */
|
---|
1825 | split_f0();
|
---|
1826 |
|
---|
1827 | mk_splitter(getvar_s(v), &fsplitter);
|
---|
1828 |
|
---|
1829 | } else if (v == intvar[RS]) {
|
---|
1830 | mk_splitter(getvar_s(v), &rsplitter);
|
---|
1831 |
|
---|
1832 | } else if (v == intvar[IGNORECASE]) {
|
---|
1833 | icase = istrue(v);
|
---|
1834 |
|
---|
1835 | } else { /* $n */
|
---|
1836 | n = getvar_i(intvar[NF]);
|
---|
1837 | setvar_i(intvar[NF], n > v-Fields ? n : v-Fields+1);
|
---|
1838 | /* right here v is invalid. Just to note... */
|
---|
1839 | }
|
---|
1840 | }
|
---|
1841 |
|
---|
1842 | /* step through func/builtin/etc arguments */
|
---|
1843 | static node *nextarg(node **pn)
|
---|
1844 | {
|
---|
1845 | node *n;
|
---|
1846 |
|
---|
1847 | n = *pn;
|
---|
1848 | if (n && (n->info & OPCLSMASK) == OC_COMMA) {
|
---|
1849 | *pn = n->r.n;
|
---|
1850 | n = n->l.n;
|
---|
1851 | } else {
|
---|
1852 | *pn = NULL;
|
---|
1853 | }
|
---|
1854 | return n;
|
---|
1855 | }
|
---|
1856 |
|
---|
1857 | static void hashwalk_init(var *v, xhash *array)
|
---|
1858 | {
|
---|
1859 | hash_item *hi;
|
---|
1860 | unsigned i;
|
---|
1861 | walker_list *w;
|
---|
1862 | walker_list *prev_walker;
|
---|
1863 |
|
---|
1864 | if (v->type & VF_WALK) {
|
---|
1865 | prev_walker = v->x.walker;
|
---|
1866 | } else {
|
---|
1867 | v->type |= VF_WALK;
|
---|
1868 | prev_walker = NULL;
|
---|
1869 | }
|
---|
1870 | debug_printf_walker("hashwalk_init: prev_walker:%p\n", prev_walker);
|
---|
1871 |
|
---|
1872 | w = v->x.walker = xzalloc(sizeof(*w) + array->glen + 1); /* why + 1? */
|
---|
1873 | debug_printf_walker(" walker@%p=%p\n", &v->x.walker, w);
|
---|
1874 | w->cur = w->end = w->wbuf;
|
---|
1875 | w->prev = prev_walker;
|
---|
1876 | for (i = 0; i < array->csize; i++) {
|
---|
1877 | hi = array->items[i];
|
---|
1878 | while (hi) {
|
---|
1879 | strcpy(w->end, hi->name);
|
---|
1880 | nextword(&w->end);
|
---|
1881 | hi = hi->next;
|
---|
1882 | }
|
---|
1883 | }
|
---|
1884 | }
|
---|
1885 |
|
---|
1886 | static int hashwalk_next(var *v)
|
---|
1887 | {
|
---|
1888 | walker_list *w = v->x.walker;
|
---|
1889 |
|
---|
1890 | if (w->cur >= w->end) {
|
---|
1891 | walker_list *prev_walker = w->prev;
|
---|
1892 |
|
---|
1893 | debug_printf_walker("end of iteration, free(walker@%p:%p), prev_walker:%p\n", &v->x.walker, w, prev_walker);
|
---|
1894 | free(w);
|
---|
1895 | v->x.walker = prev_walker;
|
---|
1896 | return FALSE;
|
---|
1897 | }
|
---|
1898 |
|
---|
1899 | setvar_s(v, nextword(&w->cur));
|
---|
1900 | return TRUE;
|
---|
1901 | }
|
---|
1902 |
|
---|
1903 | /* evaluate node, return 1 when result is true, 0 otherwise */
|
---|
1904 | static int ptest(node *pattern)
|
---|
1905 | {
|
---|
1906 | /* ptest__v is "static": to save stack space? */
|
---|
1907 | return istrue(evaluate(pattern, &G.ptest__v));
|
---|
1908 | }
|
---|
1909 |
|
---|
1910 | /* read next record from stream rsm into a variable v */
|
---|
1911 | static int awk_getline(rstream *rsm, var *v)
|
---|
1912 | {
|
---|
1913 | char *b;
|
---|
1914 | regmatch_t pmatch[2];
|
---|
1915 | int size, a, p, pp = 0;
|
---|
1916 | int fd, so, eo, r, rp;
|
---|
1917 | char c, *m, *s;
|
---|
1918 |
|
---|
1919 | debug_printf_eval("entered %s()\n", __func__);
|
---|
1920 |
|
---|
1921 | /* we're using our own buffer since we need access to accumulating
|
---|
1922 | * characters
|
---|
1923 | */
|
---|
1924 | fd = fileno(rsm->F);
|
---|
1925 | m = rsm->buffer;
|
---|
1926 | a = rsm->adv;
|
---|
1927 | p = rsm->pos;
|
---|
1928 | size = rsm->size;
|
---|
1929 | c = (char) rsplitter.n.info;
|
---|
1930 | rp = 0;
|
---|
1931 |
|
---|
1932 | if (!m)
|
---|
1933 | m = qrealloc(m, 256, &size);
|
---|
1934 |
|
---|
1935 | do {
|
---|
1936 | b = m + a;
|
---|
1937 | so = eo = p;
|
---|
1938 | r = 1;
|
---|
1939 | if (p > 0) {
|
---|
1940 | if ((rsplitter.n.info & OPCLSMASK) == OC_REGEXP) {
|
---|
1941 | if (regexec(icase ? rsplitter.n.r.ire : rsplitter.n.l.re,
|
---|
1942 | b, 1, pmatch, 0) == 0) {
|
---|
1943 | so = pmatch[0].rm_so;
|
---|
1944 | eo = pmatch[0].rm_eo;
|
---|
1945 | if (b[eo] != '\0')
|
---|
1946 | break;
|
---|
1947 | }
|
---|
1948 | } else if (c != '\0') {
|
---|
1949 | s = strchr(b+pp, c);
|
---|
1950 | if (!s)
|
---|
1951 | s = memchr(b+pp, '\0', p - pp);
|
---|
1952 | if (s) {
|
---|
1953 | so = eo = s-b;
|
---|
1954 | eo++;
|
---|
1955 | break;
|
---|
1956 | }
|
---|
1957 | } else {
|
---|
1958 | while (b[rp] == '\n')
|
---|
1959 | rp++;
|
---|
1960 | s = strstr(b+rp, "\n\n");
|
---|
1961 | if (s) {
|
---|
1962 | so = eo = s-b;
|
---|
1963 | while (b[eo] == '\n')
|
---|
1964 | eo++;
|
---|
1965 | if (b[eo] != '\0')
|
---|
1966 | break;
|
---|
1967 | }
|
---|
1968 | }
|
---|
1969 | }
|
---|
1970 |
|
---|
1971 | if (a > 0) {
|
---|
1972 | memmove(m, m+a, p+1);
|
---|
1973 | b = m;
|
---|
1974 | a = 0;
|
---|
1975 | }
|
---|
1976 |
|
---|
1977 | m = qrealloc(m, a+p+128, &size);
|
---|
1978 | b = m + a;
|
---|
1979 | pp = p;
|
---|
1980 | p += safe_read(fd, b+p, size-p-1);
|
---|
1981 | if (p < pp) {
|
---|
1982 | p = 0;
|
---|
1983 | r = 0;
|
---|
1984 | setvar_i(intvar[ERRNO], errno);
|
---|
1985 | }
|
---|
1986 | b[p] = '\0';
|
---|
1987 |
|
---|
1988 | } while (p > pp);
|
---|
1989 |
|
---|
1990 | if (p == 0) {
|
---|
1991 | r--;
|
---|
1992 | } else {
|
---|
1993 | c = b[so]; b[so] = '\0';
|
---|
1994 | setvar_s(v, b+rp);
|
---|
1995 | v->type |= VF_USER;
|
---|
1996 | b[so] = c;
|
---|
1997 | c = b[eo]; b[eo] = '\0';
|
---|
1998 | setvar_s(intvar[RT], b+so);
|
---|
1999 | b[eo] = c;
|
---|
2000 | }
|
---|
2001 |
|
---|
2002 | rsm->buffer = m;
|
---|
2003 | rsm->adv = a + eo;
|
---|
2004 | rsm->pos = p - eo;
|
---|
2005 | rsm->size = size;
|
---|
2006 |
|
---|
2007 | debug_printf_eval("returning from %s(): %d\n", __func__, r);
|
---|
2008 |
|
---|
2009 | return r;
|
---|
2010 | }
|
---|
2011 |
|
---|
2012 | static int fmt_num(char *b, int size, const char *format, double n, int int_as_int)
|
---|
2013 | {
|
---|
2014 | int r = 0;
|
---|
2015 | char c;
|
---|
2016 | const char *s = format;
|
---|
2017 |
|
---|
2018 | if (int_as_int && n == (int)n) {
|
---|
2019 | r = snprintf(b, size, "%d", (int)n);
|
---|
2020 | } else {
|
---|
2021 | do { c = *s; } while (c && *++s);
|
---|
2022 | if (strchr("diouxX", c)) {
|
---|
2023 | r = snprintf(b, size, format, (int)n);
|
---|
2024 | } else if (strchr("eEfgG", c)) {
|
---|
2025 | r = snprintf(b, size, format, n);
|
---|
2026 | } else {
|
---|
2027 | syntax_error(EMSG_INV_FMT);
|
---|
2028 | }
|
---|
2029 | }
|
---|
2030 | return r;
|
---|
2031 | }
|
---|
2032 |
|
---|
2033 | /* formatted output into an allocated buffer, return ptr to buffer */
|
---|
2034 | static char *awk_printf(node *n)
|
---|
2035 | {
|
---|
2036 | char *b = NULL;
|
---|
2037 | char *fmt, *s, *f;
|
---|
2038 | const char *s1;
|
---|
2039 | int i, j, incr, bsize;
|
---|
2040 | char c, c1;
|
---|
2041 | var *v, *arg;
|
---|
2042 |
|
---|
2043 | v = nvalloc(1);
|
---|
2044 | fmt = f = xstrdup(getvar_s(evaluate(nextarg(&n), v)));
|
---|
2045 |
|
---|
2046 | i = 0;
|
---|
2047 | while (*f) {
|
---|
2048 | s = f;
|
---|
2049 | while (*f && (*f != '%' || *++f == '%'))
|
---|
2050 | f++;
|
---|
2051 | while (*f && !isalpha(*f)) {
|
---|
2052 | if (*f == '*')
|
---|
2053 | syntax_error("%*x formats are not supported");
|
---|
2054 | f++;
|
---|
2055 | }
|
---|
2056 |
|
---|
2057 | incr = (f - s) + MAXVARFMT;
|
---|
2058 | b = qrealloc(b, incr + i, &bsize);
|
---|
2059 | c = *f;
|
---|
2060 | if (c != '\0')
|
---|
2061 | f++;
|
---|
2062 | c1 = *f;
|
---|
2063 | *f = '\0';
|
---|
2064 | arg = evaluate(nextarg(&n), v);
|
---|
2065 |
|
---|
2066 | j = i;
|
---|
2067 | if (c == 'c' || !c) {
|
---|
2068 | i += sprintf(b+i, s, is_numeric(arg) ?
|
---|
2069 | (char)getvar_i(arg) : *getvar_s(arg));
|
---|
2070 | } else if (c == 's') {
|
---|
2071 | s1 = getvar_s(arg);
|
---|
2072 | b = qrealloc(b, incr+i+strlen(s1), &bsize);
|
---|
2073 | i += sprintf(b+i, s, s1);
|
---|
2074 | } else {
|
---|
2075 | i += fmt_num(b+i, incr, s, getvar_i(arg), FALSE);
|
---|
2076 | }
|
---|
2077 | *f = c1;
|
---|
2078 |
|
---|
2079 | /* if there was an error while sprintf, return value is negative */
|
---|
2080 | if (i < j)
|
---|
2081 | i = j;
|
---|
2082 | }
|
---|
2083 |
|
---|
2084 | free(fmt);
|
---|
2085 | nvfree(v);
|
---|
2086 | b = xrealloc(b, i + 1);
|
---|
2087 | b[i] = '\0';
|
---|
2088 | return b;
|
---|
2089 | }
|
---|
2090 |
|
---|
2091 | /* Common substitution routine.
|
---|
2092 | * Replace (nm)'th substring of (src) that matches (rn) with (repl),
|
---|
2093 | * store result into (dest), return number of substitutions.
|
---|
2094 | * If nm = 0, replace all matches.
|
---|
2095 | * If src or dst is NULL, use $0.
|
---|
2096 | * If subexp != 0, enable subexpression matching (\1-\9).
|
---|
2097 | */
|
---|
2098 | static int awk_sub(node *rn, const char *repl, int nm, var *src, var *dest, int subexp)
|
---|
2099 | {
|
---|
2100 | char *resbuf;
|
---|
2101 | const char *sp;
|
---|
2102 | int match_no, residx, replen, resbufsize;
|
---|
2103 | int regexec_flags;
|
---|
2104 | regmatch_t pmatch[10];
|
---|
2105 | regex_t sreg, *regex;
|
---|
2106 |
|
---|
2107 | resbuf = NULL;
|
---|
2108 | residx = 0;
|
---|
2109 | match_no = 0;
|
---|
2110 | regexec_flags = 0;
|
---|
2111 | regex = as_regex(rn, &sreg);
|
---|
2112 | sp = getvar_s(src ? src : intvar[F0]);
|
---|
2113 | replen = strlen(repl);
|
---|
2114 | while (regexec(regex, sp, 10, pmatch, regexec_flags) == 0) {
|
---|
2115 | int so = pmatch[0].rm_so;
|
---|
2116 | int eo = pmatch[0].rm_eo;
|
---|
2117 |
|
---|
2118 | //bb_error_msg("match %u: [%u,%u] '%s'%p", match_no+1, so, eo, sp,sp);
|
---|
2119 | resbuf = qrealloc(resbuf, residx + eo + replen, &resbufsize);
|
---|
2120 | memcpy(resbuf + residx, sp, eo);
|
---|
2121 | residx += eo;
|
---|
2122 | if (++match_no >= nm) {
|
---|
2123 | const char *s;
|
---|
2124 | int nbs;
|
---|
2125 |
|
---|
2126 | /* replace */
|
---|
2127 | residx -= (eo - so);
|
---|
2128 | nbs = 0;
|
---|
2129 | for (s = repl; *s; s++) {
|
---|
2130 | char c = resbuf[residx++] = *s;
|
---|
2131 | if (c == '\\') {
|
---|
2132 | nbs++;
|
---|
2133 | continue;
|
---|
2134 | }
|
---|
2135 | if (c == '&' || (subexp && c >= '0' && c <= '9')) {
|
---|
2136 | int j;
|
---|
2137 | residx -= ((nbs + 3) >> 1);
|
---|
2138 | j = 0;
|
---|
2139 | if (c != '&') {
|
---|
2140 | j = c - '0';
|
---|
2141 | nbs++;
|
---|
2142 | }
|
---|
2143 | if (nbs % 2) {
|
---|
2144 | resbuf[residx++] = c;
|
---|
2145 | } else {
|
---|
2146 | int n = pmatch[j].rm_eo - pmatch[j].rm_so;
|
---|
2147 | resbuf = qrealloc(resbuf, residx + replen + n, &resbufsize);
|
---|
2148 | memcpy(resbuf + residx, sp + pmatch[j].rm_so, n);
|
---|
2149 | residx += n;
|
---|
2150 | }
|
---|
2151 | }
|
---|
2152 | nbs = 0;
|
---|
2153 | }
|
---|
2154 | }
|
---|
2155 |
|
---|
2156 | regexec_flags = REG_NOTBOL;
|
---|
2157 | sp += eo;
|
---|
2158 | if (match_no == nm)
|
---|
2159 | break;
|
---|
2160 | if (eo == so) {
|
---|
2161 | /* Empty match (e.g. "b*" will match anywhere).
|
---|
2162 | * Advance by one char. */
|
---|
2163 | //BUG (bug 1333):
|
---|
2164 | //gsub(/\<b*/,"") on "abc" will reach this point, advance to "bc"
|
---|
2165 | //... and will erroneously match "b" even though it is NOT at the word start.
|
---|
2166 | //we need REG_NOTBOW but it does not exist...
|
---|
2167 | //TODO: if EXTRA_COMPAT=y, use GNU matching and re_search,
|
---|
2168 | //it should be able to do it correctly.
|
---|
2169 | /* Subtle: this is safe only because
|
---|
2170 | * qrealloc allocated at least one extra byte */
|
---|
2171 | resbuf[residx] = *sp;
|
---|
2172 | if (*sp == '\0')
|
---|
2173 | goto ret;
|
---|
2174 | sp++;
|
---|
2175 | residx++;
|
---|
2176 | }
|
---|
2177 | }
|
---|
2178 |
|
---|
2179 | resbuf = qrealloc(resbuf, residx + strlen(sp), &resbufsize);
|
---|
2180 | strcpy(resbuf + residx, sp);
|
---|
2181 | ret:
|
---|
2182 | //bb_error_msg("end sp:'%s'%p", sp,sp);
|
---|
2183 | setvar_p(dest ? dest : intvar[F0], resbuf);
|
---|
2184 | if (regex == &sreg)
|
---|
2185 | regfree(regex);
|
---|
2186 | return match_no;
|
---|
2187 | }
|
---|
2188 |
|
---|
2189 | static NOINLINE int do_mktime(const char *ds)
|
---|
2190 | {
|
---|
2191 | struct tm then;
|
---|
2192 | int count;
|
---|
2193 |
|
---|
2194 | /*memset(&then, 0, sizeof(then)); - not needed */
|
---|
2195 | then.tm_isdst = -1; /* default is unknown */
|
---|
2196 |
|
---|
2197 | /* manpage of mktime says these fields are ints,
|
---|
2198 | * so we can sscanf stuff directly into them */
|
---|
2199 | count = sscanf(ds, "%u %u %u %u %u %u %d",
|
---|
2200 | &then.tm_year, &then.tm_mon, &then.tm_mday,
|
---|
2201 | &then.tm_hour, &then.tm_min, &then.tm_sec,
|
---|
2202 | &then.tm_isdst);
|
---|
2203 |
|
---|
2204 | if (count < 6
|
---|
2205 | || (unsigned)then.tm_mon < 1
|
---|
2206 | || (unsigned)then.tm_year < 1900
|
---|
2207 | ) {
|
---|
2208 | return -1;
|
---|
2209 | }
|
---|
2210 |
|
---|
2211 | then.tm_mon -= 1;
|
---|
2212 | then.tm_year -= 1900;
|
---|
2213 |
|
---|
2214 | return mktime(&then);
|
---|
2215 | }
|
---|
2216 |
|
---|
2217 | static NOINLINE var *exec_builtin(node *op, var *res)
|
---|
2218 | {
|
---|
2219 | #define tspl (G.exec_builtin__tspl)
|
---|
2220 |
|
---|
2221 | var *tv;
|
---|
2222 | node *an[4];
|
---|
2223 | var *av[4];
|
---|
2224 | const char *as[4];
|
---|
2225 | regmatch_t pmatch[2];
|
---|
2226 | regex_t sreg, *re;
|
---|
2227 | node *spl;
|
---|
2228 | uint32_t isr, info;
|
---|
2229 | int nargs;
|
---|
2230 | time_t tt;
|
---|
2231 | int i, l, ll, n;
|
---|
2232 |
|
---|
2233 | tv = nvalloc(4);
|
---|
2234 | isr = info = op->info;
|
---|
2235 | op = op->l.n;
|
---|
2236 |
|
---|
2237 | av[2] = av[3] = NULL;
|
---|
2238 | for (i = 0; i < 4 && op; i++) {
|
---|
2239 | an[i] = nextarg(&op);
|
---|
2240 | if (isr & 0x09000000)
|
---|
2241 | av[i] = evaluate(an[i], &tv[i]);
|
---|
2242 | if (isr & 0x08000000)
|
---|
2243 | as[i] = getvar_s(av[i]);
|
---|
2244 | isr >>= 1;
|
---|
2245 | }
|
---|
2246 |
|
---|
2247 | nargs = i;
|
---|
2248 | if ((uint32_t)nargs < (info >> 30))
|
---|
2249 | syntax_error(EMSG_TOO_FEW_ARGS);
|
---|
2250 |
|
---|
2251 | info &= OPNMASK;
|
---|
2252 | switch (info) {
|
---|
2253 |
|
---|
2254 | case B_a2:
|
---|
2255 | if (ENABLE_FEATURE_AWK_LIBM)
|
---|
2256 | setvar_i(res, atan2(getvar_i(av[0]), getvar_i(av[1])));
|
---|
2257 | else
|
---|
2258 | syntax_error(EMSG_NO_MATH);
|
---|
2259 | break;
|
---|
2260 |
|
---|
2261 | case B_sp: {
|
---|
2262 | char *s, *s1;
|
---|
2263 |
|
---|
2264 | if (nargs > 2) {
|
---|
2265 | spl = (an[2]->info & OPCLSMASK) == OC_REGEXP ?
|
---|
2266 | an[2] : mk_splitter(getvar_s(evaluate(an[2], &tv[2])), &tspl);
|
---|
2267 | } else {
|
---|
2268 | spl = &fsplitter.n;
|
---|
2269 | }
|
---|
2270 |
|
---|
2271 | n = awk_split(as[0], spl, &s);
|
---|
2272 | s1 = s;
|
---|
2273 | clear_array(iamarray(av[1]));
|
---|
2274 | for (i = 1; i <= n; i++)
|
---|
2275 | setari_u(av[1], i, nextword(&s));
|
---|
2276 | free(s1);
|
---|
2277 | setvar_i(res, n);
|
---|
2278 | break;
|
---|
2279 | }
|
---|
2280 |
|
---|
2281 | case B_ss: {
|
---|
2282 | char *s;
|
---|
2283 |
|
---|
2284 | l = strlen(as[0]);
|
---|
2285 | i = getvar_i(av[1]) - 1;
|
---|
2286 | if (i > l)
|
---|
2287 | i = l;
|
---|
2288 | if (i < 0)
|
---|
2289 | i = 0;
|
---|
2290 | n = (nargs > 2) ? getvar_i(av[2]) : l-i;
|
---|
2291 | if (n < 0)
|
---|
2292 | n = 0;
|
---|
2293 | s = xstrndup(as[0]+i, n);
|
---|
2294 | setvar_p(res, s);
|
---|
2295 | break;
|
---|
2296 | }
|
---|
2297 |
|
---|
2298 | /* Bitwise ops must assume that operands are unsigned. GNU Awk 3.1.5:
|
---|
2299 | * awk '{ print or(-1,1) }' gives "4.29497e+09", not "-2.xxxe+09" */
|
---|
2300 | case B_an:
|
---|
2301 | setvar_i(res, getvar_i_int(av[0]) & getvar_i_int(av[1]));
|
---|
2302 | break;
|
---|
2303 |
|
---|
2304 | case B_co:
|
---|
2305 | setvar_i(res, ~getvar_i_int(av[0]));
|
---|
2306 | break;
|
---|
2307 |
|
---|
2308 | case B_ls:
|
---|
2309 | setvar_i(res, getvar_i_int(av[0]) << getvar_i_int(av[1]));
|
---|
2310 | break;
|
---|
2311 |
|
---|
2312 | case B_or:
|
---|
2313 | setvar_i(res, getvar_i_int(av[0]) | getvar_i_int(av[1]));
|
---|
2314 | break;
|
---|
2315 |
|
---|
2316 | case B_rs:
|
---|
2317 | setvar_i(res, getvar_i_int(av[0]) >> getvar_i_int(av[1]));
|
---|
2318 | break;
|
---|
2319 |
|
---|
2320 | case B_xo:
|
---|
2321 | setvar_i(res, getvar_i_int(av[0]) ^ getvar_i_int(av[1]));
|
---|
2322 | break;
|
---|
2323 |
|
---|
2324 | case B_lo:
|
---|
2325 | case B_up: {
|
---|
2326 | char *s, *s1;
|
---|
2327 | s1 = s = xstrdup(as[0]);
|
---|
2328 | while (*s1) {
|
---|
2329 | //*s1 = (info == B_up) ? toupper(*s1) : tolower(*s1);
|
---|
2330 | if ((unsigned char)((*s1 | 0x20) - 'a') <= ('z' - 'a'))
|
---|
2331 | *s1 = (info == B_up) ? (*s1 & 0xdf) : (*s1 | 0x20);
|
---|
2332 | s1++;
|
---|
2333 | }
|
---|
2334 | setvar_p(res, s);
|
---|
2335 | break;
|
---|
2336 | }
|
---|
2337 |
|
---|
2338 | case B_ix:
|
---|
2339 | n = 0;
|
---|
2340 | ll = strlen(as[1]);
|
---|
2341 | l = strlen(as[0]) - ll;
|
---|
2342 | if (ll > 0 && l >= 0) {
|
---|
2343 | if (!icase) {
|
---|
2344 | char *s = strstr(as[0], as[1]);
|
---|
2345 | if (s)
|
---|
2346 | n = (s - as[0]) + 1;
|
---|
2347 | } else {
|
---|
2348 | /* this piece of code is terribly slow and
|
---|
2349 | * really should be rewritten
|
---|
2350 | */
|
---|
2351 | for (i = 0; i <= l; i++) {
|
---|
2352 | if (strncasecmp(as[0]+i, as[1], ll) == 0) {
|
---|
2353 | n = i+1;
|
---|
2354 | break;
|
---|
2355 | }
|
---|
2356 | }
|
---|
2357 | }
|
---|
2358 | }
|
---|
2359 | setvar_i(res, n);
|
---|
2360 | break;
|
---|
2361 |
|
---|
2362 | case B_ti:
|
---|
2363 | if (nargs > 1)
|
---|
2364 | tt = getvar_i(av[1]);
|
---|
2365 | else
|
---|
2366 | time(&tt);
|
---|
2367 | //s = (nargs > 0) ? as[0] : "%a %b %d %H:%M:%S %Z %Y";
|
---|
2368 | i = strftime(g_buf, MAXVARFMT,
|
---|
2369 | ((nargs > 0) ? as[0] : "%a %b %d %H:%M:%S %Z %Y"),
|
---|
2370 | localtime(&tt));
|
---|
2371 | g_buf[i] = '\0';
|
---|
2372 | setvar_s(res, g_buf);
|
---|
2373 | break;
|
---|
2374 |
|
---|
2375 | case B_mt:
|
---|
2376 | setvar_i(res, do_mktime(as[0]));
|
---|
2377 | break;
|
---|
2378 |
|
---|
2379 | case B_ma:
|
---|
2380 | re = as_regex(an[1], &sreg);
|
---|
2381 | n = regexec(re, as[0], 1, pmatch, 0);
|
---|
2382 | if (n == 0) {
|
---|
2383 | pmatch[0].rm_so++;
|
---|
2384 | pmatch[0].rm_eo++;
|
---|
2385 | } else {
|
---|
2386 | pmatch[0].rm_so = 0;
|
---|
2387 | pmatch[0].rm_eo = -1;
|
---|
2388 | }
|
---|
2389 | setvar_i(newvar("RSTART"), pmatch[0].rm_so);
|
---|
2390 | setvar_i(newvar("RLENGTH"), pmatch[0].rm_eo - pmatch[0].rm_so);
|
---|
2391 | setvar_i(res, pmatch[0].rm_so);
|
---|
2392 | if (re == &sreg)
|
---|
2393 | regfree(re);
|
---|
2394 | break;
|
---|
2395 |
|
---|
2396 | case B_ge:
|
---|
2397 | awk_sub(an[0], as[1], getvar_i(av[2]), av[3], res, TRUE);
|
---|
2398 | break;
|
---|
2399 |
|
---|
2400 | case B_gs:
|
---|
2401 | setvar_i(res, awk_sub(an[0], as[1], 0, av[2], av[2], FALSE));
|
---|
2402 | break;
|
---|
2403 |
|
---|
2404 | case B_su:
|
---|
2405 | setvar_i(res, awk_sub(an[0], as[1], 1, av[2], av[2], FALSE));
|
---|
2406 | break;
|
---|
2407 | }
|
---|
2408 |
|
---|
2409 | nvfree(tv);
|
---|
2410 | return res;
|
---|
2411 | #undef tspl
|
---|
2412 | }
|
---|
2413 |
|
---|
2414 | /*
|
---|
2415 | * Evaluate node - the heart of the program. Supplied with subtree
|
---|
2416 | * and place where to store result. returns ptr to result.
|
---|
2417 | */
|
---|
2418 | #define XC(n) ((n) >> 8)
|
---|
2419 |
|
---|
2420 | static var *evaluate(node *op, var *res)
|
---|
2421 | {
|
---|
2422 | /* This procedure is recursive so we should count every byte */
|
---|
2423 | #define fnargs (G.evaluate__fnargs)
|
---|
2424 | /* seed is initialized to 1 */
|
---|
2425 | #define seed (G.evaluate__seed)
|
---|
2426 | #define sreg (G.evaluate__sreg)
|
---|
2427 |
|
---|
2428 | var *v1;
|
---|
2429 |
|
---|
2430 | if (!op)
|
---|
2431 | return setvar_s(res, NULL);
|
---|
2432 |
|
---|
2433 | debug_printf_eval("entered %s()\n", __func__);
|
---|
2434 |
|
---|
2435 | v1 = nvalloc(2);
|
---|
2436 |
|
---|
2437 | while (op) {
|
---|
2438 | struct {
|
---|
2439 | var *v;
|
---|
2440 | const char *s;
|
---|
2441 | } L = L; /* for compiler */
|
---|
2442 | struct {
|
---|
2443 | var *v;
|
---|
2444 | const char *s;
|
---|
2445 | } R = R;
|
---|
2446 | double L_d = L_d;
|
---|
2447 | uint32_t opinfo;
|
---|
2448 | int opn;
|
---|
2449 | node *op1;
|
---|
2450 |
|
---|
2451 | opinfo = op->info;
|
---|
2452 | opn = (opinfo & OPNMASK);
|
---|
2453 | g_lineno = op->lineno;
|
---|
2454 | op1 = op->l.n;
|
---|
2455 | debug_printf_eval("opinfo:%08x opn:%08x\n", opinfo, opn);
|
---|
2456 |
|
---|
2457 | /* execute inevitable things */
|
---|
2458 | if (opinfo & OF_RES1)
|
---|
2459 | L.v = evaluate(op1, v1);
|
---|
2460 | if (opinfo & OF_RES2)
|
---|
2461 | R.v = evaluate(op->r.n, v1+1);
|
---|
2462 | if (opinfo & OF_STR1) {
|
---|
2463 | L.s = getvar_s(L.v);
|
---|
2464 | debug_printf_eval("L.s:'%s'\n", L.s);
|
---|
2465 | }
|
---|
2466 | if (opinfo & OF_STR2) {
|
---|
2467 | R.s = getvar_s(R.v);
|
---|
2468 | debug_printf_eval("R.s:'%s'\n", R.s);
|
---|
2469 | }
|
---|
2470 | if (opinfo & OF_NUM1) {
|
---|
2471 | L_d = getvar_i(L.v);
|
---|
2472 | debug_printf_eval("L_d:%f\n", L_d);
|
---|
2473 | }
|
---|
2474 |
|
---|
2475 | debug_printf_eval("switch(0x%x)\n", XC(opinfo & OPCLSMASK));
|
---|
2476 | switch (XC(opinfo & OPCLSMASK)) {
|
---|
2477 |
|
---|
2478 | /* -- iterative node type -- */
|
---|
2479 |
|
---|
2480 | /* test pattern */
|
---|
2481 | case XC( OC_TEST ):
|
---|
2482 | if ((op1->info & OPCLSMASK) == OC_COMMA) {
|
---|
2483 | /* it's range pattern */
|
---|
2484 | if ((opinfo & OF_CHECKED) || ptest(op1->l.n)) {
|
---|
2485 | op->info |= OF_CHECKED;
|
---|
2486 | if (ptest(op1->r.n))
|
---|
2487 | op->info &= ~OF_CHECKED;
|
---|
2488 | op = op->a.n;
|
---|
2489 | } else {
|
---|
2490 | op = op->r.n;
|
---|
2491 | }
|
---|
2492 | } else {
|
---|
2493 | op = ptest(op1) ? op->a.n : op->r.n;
|
---|
2494 | }
|
---|
2495 | break;
|
---|
2496 |
|
---|
2497 | /* just evaluate an expression, also used as unconditional jump */
|
---|
2498 | case XC( OC_EXEC ):
|
---|
2499 | break;
|
---|
2500 |
|
---|
2501 | /* branch, used in if-else and various loops */
|
---|
2502 | case XC( OC_BR ):
|
---|
2503 | op = istrue(L.v) ? op->a.n : op->r.n;
|
---|
2504 | break;
|
---|
2505 |
|
---|
2506 | /* initialize for-in loop */
|
---|
2507 | case XC( OC_WALKINIT ):
|
---|
2508 | hashwalk_init(L.v, iamarray(R.v));
|
---|
2509 | break;
|
---|
2510 |
|
---|
2511 | /* get next array item */
|
---|
2512 | case XC( OC_WALKNEXT ):
|
---|
2513 | op = hashwalk_next(L.v) ? op->a.n : op->r.n;
|
---|
2514 | break;
|
---|
2515 |
|
---|
2516 | case XC( OC_PRINT ):
|
---|
2517 | case XC( OC_PRINTF ): {
|
---|
2518 | FILE *F = stdout;
|
---|
2519 |
|
---|
2520 | if (op->r.n) {
|
---|
2521 | rstream *rsm = newfile(R.s);
|
---|
2522 | if (!rsm->F) {
|
---|
2523 | if (opn == '|') {
|
---|
2524 | rsm->F = popen(R.s, "w");
|
---|
2525 | if (rsm->F == NULL)
|
---|
2526 | bb_perror_msg_and_die("popen");
|
---|
2527 | rsm->is_pipe = 1;
|
---|
2528 | } else {
|
---|
2529 | rsm->F = xfopen(R.s, opn=='w' ? "w" : "a");
|
---|
2530 | }
|
---|
2531 | }
|
---|
2532 | F = rsm->F;
|
---|
2533 | }
|
---|
2534 |
|
---|
2535 | if ((opinfo & OPCLSMASK) == OC_PRINT) {
|
---|
2536 | if (!op1) {
|
---|
2537 | fputs(getvar_s(intvar[F0]), F);
|
---|
2538 | } else {
|
---|
2539 | while (op1) {
|
---|
2540 | var *v = evaluate(nextarg(&op1), v1);
|
---|
2541 | if (v->type & VF_NUMBER) {
|
---|
2542 | fmt_num(g_buf, MAXVARFMT, getvar_s(intvar[OFMT]),
|
---|
2543 | getvar_i(v), TRUE);
|
---|
2544 | fputs(g_buf, F);
|
---|
2545 | } else {
|
---|
2546 | fputs(getvar_s(v), F);
|
---|
2547 | }
|
---|
2548 |
|
---|
2549 | if (op1)
|
---|
2550 | fputs(getvar_s(intvar[OFS]), F);
|
---|
2551 | }
|
---|
2552 | }
|
---|
2553 | fputs(getvar_s(intvar[ORS]), F);
|
---|
2554 |
|
---|
2555 | } else { /* OC_PRINTF */
|
---|
2556 | char *s = awk_printf(op1);
|
---|
2557 | fputs(s, F);
|
---|
2558 | free(s);
|
---|
2559 | }
|
---|
2560 | fflush(F);
|
---|
2561 | break;
|
---|
2562 | }
|
---|
2563 |
|
---|
2564 | case XC( OC_DELETE ): {
|
---|
2565 | uint32_t info = op1->info & OPCLSMASK;
|
---|
2566 | var *v;
|
---|
2567 |
|
---|
2568 | if (info == OC_VAR) {
|
---|
2569 | v = op1->l.v;
|
---|
2570 | } else if (info == OC_FNARG) {
|
---|
2571 | v = &fnargs[op1->l.aidx];
|
---|
2572 | } else {
|
---|
2573 | syntax_error(EMSG_NOT_ARRAY);
|
---|
2574 | }
|
---|
2575 |
|
---|
2576 | if (op1->r.n) {
|
---|
2577 | const char *s;
|
---|
2578 | clrvar(L.v);
|
---|
2579 | s = getvar_s(evaluate(op1->r.n, v1));
|
---|
2580 | hash_remove(iamarray(v), s);
|
---|
2581 | } else {
|
---|
2582 | clear_array(iamarray(v));
|
---|
2583 | }
|
---|
2584 | break;
|
---|
2585 | }
|
---|
2586 |
|
---|
2587 | case XC( OC_NEWSOURCE ):
|
---|
2588 | g_progname = op->l.new_progname;
|
---|
2589 | break;
|
---|
2590 |
|
---|
2591 | case XC( OC_RETURN ):
|
---|
2592 | copyvar(res, L.v);
|
---|
2593 | break;
|
---|
2594 |
|
---|
2595 | case XC( OC_NEXTFILE ):
|
---|
2596 | nextfile = TRUE;
|
---|
2597 | case XC( OC_NEXT ):
|
---|
2598 | nextrec = TRUE;
|
---|
2599 | case XC( OC_DONE ):
|
---|
2600 | clrvar(res);
|
---|
2601 | break;
|
---|
2602 |
|
---|
2603 | case XC( OC_EXIT ):
|
---|
2604 | awk_exit(L_d);
|
---|
2605 |
|
---|
2606 | /* -- recursive node type -- */
|
---|
2607 |
|
---|
2608 | case XC( OC_VAR ):
|
---|
2609 | L.v = op->l.v;
|
---|
2610 | if (L.v == intvar[NF])
|
---|
2611 | split_f0();
|
---|
2612 | goto v_cont;
|
---|
2613 |
|
---|
2614 | case XC( OC_FNARG ):
|
---|
2615 | L.v = &fnargs[op->l.aidx];
|
---|
2616 | v_cont:
|
---|
2617 | res = op->r.n ? findvar(iamarray(L.v), R.s) : L.v;
|
---|
2618 | break;
|
---|
2619 |
|
---|
2620 | case XC( OC_IN ):
|
---|
2621 | setvar_i(res, hash_search(iamarray(R.v), L.s) ? 1 : 0);
|
---|
2622 | break;
|
---|
2623 |
|
---|
2624 | case XC( OC_REGEXP ):
|
---|
2625 | op1 = op;
|
---|
2626 | L.s = getvar_s(intvar[F0]);
|
---|
2627 | goto re_cont;
|
---|
2628 |
|
---|
2629 | case XC( OC_MATCH ):
|
---|
2630 | op1 = op->r.n;
|
---|
2631 | re_cont:
|
---|
2632 | {
|
---|
2633 | regex_t *re = as_regex(op1, &sreg);
|
---|
2634 | int i = regexec(re, L.s, 0, NULL, 0);
|
---|
2635 | if (re == &sreg)
|
---|
2636 | regfree(re);
|
---|
2637 | setvar_i(res, (i == 0) ^ (opn == '!'));
|
---|
2638 | }
|
---|
2639 | break;
|
---|
2640 |
|
---|
2641 | case XC( OC_MOVE ):
|
---|
2642 | debug_printf_eval("MOVE\n");
|
---|
2643 | /* if source is a temporary string, jusk relink it to dest */
|
---|
2644 | //Disabled: if R.v is numeric but happens to have cached R.v->string,
|
---|
2645 | //then L.v ends up being a string, which is wrong
|
---|
2646 | // if (R.v == v1+1 && R.v->string) {
|
---|
2647 | // res = setvar_p(L.v, R.v->string);
|
---|
2648 | // R.v->string = NULL;
|
---|
2649 | // } else {
|
---|
2650 | res = copyvar(L.v, R.v);
|
---|
2651 | // }
|
---|
2652 | break;
|
---|
2653 |
|
---|
2654 | case XC( OC_TERNARY ):
|
---|
2655 | if ((op->r.n->info & OPCLSMASK) != OC_COLON)
|
---|
2656 | syntax_error(EMSG_POSSIBLE_ERROR);
|
---|
2657 | res = evaluate(istrue(L.v) ? op->r.n->l.n : op->r.n->r.n, res);
|
---|
2658 | break;
|
---|
2659 |
|
---|
2660 | case XC( OC_FUNC ): {
|
---|
2661 | var *vbeg, *v;
|
---|
2662 | const char *sv_progname;
|
---|
2663 |
|
---|
2664 | if (!op->r.f->body.first)
|
---|
2665 | syntax_error(EMSG_UNDEF_FUNC);
|
---|
2666 |
|
---|
2667 | vbeg = v = nvalloc(op->r.f->nargs + 1);
|
---|
2668 | while (op1) {
|
---|
2669 | var *arg = evaluate(nextarg(&op1), v1);
|
---|
2670 | copyvar(v, arg);
|
---|
2671 | v->type |= VF_CHILD;
|
---|
2672 | v->x.parent = arg;
|
---|
2673 | if (++v - vbeg >= op->r.f->nargs)
|
---|
2674 | break;
|
---|
2675 | }
|
---|
2676 |
|
---|
2677 | v = fnargs;
|
---|
2678 | fnargs = vbeg;
|
---|
2679 | sv_progname = g_progname;
|
---|
2680 |
|
---|
2681 | res = evaluate(op->r.f->body.first, res);
|
---|
2682 |
|
---|
2683 | g_progname = sv_progname;
|
---|
2684 | nvfree(fnargs);
|
---|
2685 | fnargs = v;
|
---|
2686 |
|
---|
2687 | break;
|
---|
2688 | }
|
---|
2689 |
|
---|
2690 | case XC( OC_GETLINE ):
|
---|
2691 | case XC( OC_PGETLINE ): {
|
---|
2692 | rstream *rsm;
|
---|
2693 | int i;
|
---|
2694 |
|
---|
2695 | if (op1) {
|
---|
2696 | rsm = newfile(L.s);
|
---|
2697 | if (!rsm->F) {
|
---|
2698 | if ((opinfo & OPCLSMASK) == OC_PGETLINE) {
|
---|
2699 | rsm->F = popen(L.s, "r");
|
---|
2700 | rsm->is_pipe = TRUE;
|
---|
2701 | } else {
|
---|
2702 | rsm->F = fopen_for_read(L.s); /* not xfopen! */
|
---|
2703 | }
|
---|
2704 | }
|
---|
2705 | } else {
|
---|
2706 | if (!iF)
|
---|
2707 | iF = next_input_file();
|
---|
2708 | rsm = iF;
|
---|
2709 | }
|
---|
2710 |
|
---|
2711 | if (!rsm || !rsm->F) {
|
---|
2712 | setvar_i(intvar[ERRNO], errno);
|
---|
2713 | setvar_i(res, -1);
|
---|
2714 | break;
|
---|
2715 | }
|
---|
2716 |
|
---|
2717 | if (!op->r.n)
|
---|
2718 | R.v = intvar[F0];
|
---|
2719 |
|
---|
2720 | i = awk_getline(rsm, R.v);
|
---|
2721 | if (i > 0 && !op1) {
|
---|
2722 | incvar(intvar[FNR]);
|
---|
2723 | incvar(intvar[NR]);
|
---|
2724 | }
|
---|
2725 | setvar_i(res, i);
|
---|
2726 | break;
|
---|
2727 | }
|
---|
2728 |
|
---|
2729 | /* simple builtins */
|
---|
2730 | case XC( OC_FBLTIN ): {
|
---|
2731 | double R_d = R_d; /* for compiler */
|
---|
2732 |
|
---|
2733 | switch (opn) {
|
---|
2734 | case F_in:
|
---|
2735 | R_d = (int)L_d;
|
---|
2736 | break;
|
---|
2737 |
|
---|
2738 | case F_rn:
|
---|
2739 | R_d = (double)rand() / (double)RAND_MAX;
|
---|
2740 | break;
|
---|
2741 |
|
---|
2742 | case F_co:
|
---|
2743 | if (ENABLE_FEATURE_AWK_LIBM) {
|
---|
2744 | R_d = cos(L_d);
|
---|
2745 | break;
|
---|
2746 | }
|
---|
2747 |
|
---|
2748 | case F_ex:
|
---|
2749 | if (ENABLE_FEATURE_AWK_LIBM) {
|
---|
2750 | R_d = exp(L_d);
|
---|
2751 | break;
|
---|
2752 | }
|
---|
2753 |
|
---|
2754 | case F_lg:
|
---|
2755 | if (ENABLE_FEATURE_AWK_LIBM) {
|
---|
2756 | R_d = log(L_d);
|
---|
2757 | break;
|
---|
2758 | }
|
---|
2759 |
|
---|
2760 | case F_si:
|
---|
2761 | if (ENABLE_FEATURE_AWK_LIBM) {
|
---|
2762 | R_d = sin(L_d);
|
---|
2763 | break;
|
---|
2764 | }
|
---|
2765 |
|
---|
2766 | case F_sq:
|
---|
2767 | if (ENABLE_FEATURE_AWK_LIBM) {
|
---|
2768 | R_d = sqrt(L_d);
|
---|
2769 | break;
|
---|
2770 | }
|
---|
2771 |
|
---|
2772 | syntax_error(EMSG_NO_MATH);
|
---|
2773 | break;
|
---|
2774 |
|
---|
2775 | case F_sr:
|
---|
2776 | R_d = (double)seed;
|
---|
2777 | seed = op1 ? (unsigned)L_d : (unsigned)time(NULL);
|
---|
2778 | srand(seed);
|
---|
2779 | break;
|
---|
2780 |
|
---|
2781 | case F_ti:
|
---|
2782 | R_d = time(NULL);
|
---|
2783 | break;
|
---|
2784 |
|
---|
2785 | case F_le:
|
---|
2786 | if (!op1)
|
---|
2787 | L.s = getvar_s(intvar[F0]);
|
---|
2788 | R_d = strlen(L.s);
|
---|
2789 | break;
|
---|
2790 |
|
---|
2791 | case F_sy:
|
---|
2792 | fflush_all();
|
---|
2793 | R_d = (ENABLE_FEATURE_ALLOW_EXEC && L.s && *L.s)
|
---|
2794 | ? (system(L.s) >> 8) : 0;
|
---|
2795 | break;
|
---|
2796 |
|
---|
2797 | case F_ff:
|
---|
2798 | if (!op1) {
|
---|
2799 | fflush(stdout);
|
---|
2800 | } else if (L.s && *L.s) {
|
---|
2801 | rstream *rsm = newfile(L.s);
|
---|
2802 | fflush(rsm->F);
|
---|
2803 | } else {
|
---|
2804 | fflush_all();
|
---|
2805 | }
|
---|
2806 | break;
|
---|
2807 |
|
---|
2808 | case F_cl: {
|
---|
2809 | rstream *rsm;
|
---|
2810 | int err = 0;
|
---|
2811 | rsm = (rstream *)hash_search(fdhash, L.s);
|
---|
2812 | debug_printf_eval("OC_FBLTIN F_cl rsm:%p\n", rsm);
|
---|
2813 | if (rsm) {
|
---|
2814 | debug_printf_eval("OC_FBLTIN F_cl "
|
---|
2815 | "rsm->is_pipe:%d, ->F:%p\n",
|
---|
2816 | rsm->is_pipe, rsm->F);
|
---|
2817 | /* Can be NULL if open failed. Example:
|
---|
2818 | * getline line <"doesnt_exist";
|
---|
2819 | * close("doesnt_exist"); <--- here rsm->F is NULL
|
---|
2820 | */
|
---|
2821 | if (rsm->F)
|
---|
2822 | err = rsm->is_pipe ? pclose(rsm->F) : fclose(rsm->F);
|
---|
2823 | free(rsm->buffer);
|
---|
2824 | hash_remove(fdhash, L.s);
|
---|
2825 | }
|
---|
2826 | if (err)
|
---|
2827 | setvar_i(intvar[ERRNO], errno);
|
---|
2828 | R_d = (double)err;
|
---|
2829 | break;
|
---|
2830 | }
|
---|
2831 | } /* switch */
|
---|
2832 | setvar_i(res, R_d);
|
---|
2833 | break;
|
---|
2834 | }
|
---|
2835 |
|
---|
2836 | case XC( OC_BUILTIN ):
|
---|
2837 | res = exec_builtin(op, res);
|
---|
2838 | break;
|
---|
2839 |
|
---|
2840 | case XC( OC_SPRINTF ):
|
---|
2841 | setvar_p(res, awk_printf(op1));
|
---|
2842 | break;
|
---|
2843 |
|
---|
2844 | case XC( OC_UNARY ): {
|
---|
2845 | double Ld, R_d;
|
---|
2846 |
|
---|
2847 | Ld = R_d = getvar_i(R.v);
|
---|
2848 | switch (opn) {
|
---|
2849 | case 'P':
|
---|
2850 | Ld = ++R_d;
|
---|
2851 | goto r_op_change;
|
---|
2852 | case 'p':
|
---|
2853 | R_d++;
|
---|
2854 | goto r_op_change;
|
---|
2855 | case 'M':
|
---|
2856 | Ld = --R_d;
|
---|
2857 | goto r_op_change;
|
---|
2858 | case 'm':
|
---|
2859 | R_d--;
|
---|
2860 | r_op_change:
|
---|
2861 | setvar_i(R.v, R_d);
|
---|
2862 | break;
|
---|
2863 | case '!':
|
---|
2864 | Ld = !istrue(R.v);
|
---|
2865 | break;
|
---|
2866 | case '-':
|
---|
2867 | Ld = -R_d;
|
---|
2868 | break;
|
---|
2869 | }
|
---|
2870 | setvar_i(res, Ld);
|
---|
2871 | break;
|
---|
2872 | }
|
---|
2873 |
|
---|
2874 | case XC( OC_FIELD ): {
|
---|
2875 | int i = (int)getvar_i(R.v);
|
---|
2876 | if (i == 0) {
|
---|
2877 | res = intvar[F0];
|
---|
2878 | } else {
|
---|
2879 | split_f0();
|
---|
2880 | if (i > nfields)
|
---|
2881 | fsrealloc(i);
|
---|
2882 | res = &Fields[i - 1];
|
---|
2883 | }
|
---|
2884 | break;
|
---|
2885 | }
|
---|
2886 |
|
---|
2887 | /* concatenation (" ") and index joining (",") */
|
---|
2888 | case XC( OC_CONCAT ):
|
---|
2889 | case XC( OC_COMMA ): {
|
---|
2890 | const char *sep = "";
|
---|
2891 | if ((opinfo & OPCLSMASK) == OC_COMMA)
|
---|
2892 | sep = getvar_s(intvar[SUBSEP]);
|
---|
2893 | setvar_p(res, xasprintf("%s%s%s", L.s, sep, R.s));
|
---|
2894 | break;
|
---|
2895 | }
|
---|
2896 |
|
---|
2897 | case XC( OC_LAND ):
|
---|
2898 | setvar_i(res, istrue(L.v) ? ptest(op->r.n) : 0);
|
---|
2899 | break;
|
---|
2900 |
|
---|
2901 | case XC( OC_LOR ):
|
---|
2902 | setvar_i(res, istrue(L.v) ? 1 : ptest(op->r.n));
|
---|
2903 | break;
|
---|
2904 |
|
---|
2905 | case XC( OC_BINARY ):
|
---|
2906 | case XC( OC_REPLACE ): {
|
---|
2907 | double R_d = getvar_i(R.v);
|
---|
2908 | debug_printf_eval("BINARY/REPLACE: R_d:%f opn:%c\n", R_d, opn);
|
---|
2909 | switch (opn) {
|
---|
2910 | case '+':
|
---|
2911 | L_d += R_d;
|
---|
2912 | break;
|
---|
2913 | case '-':
|
---|
2914 | L_d -= R_d;
|
---|
2915 | break;
|
---|
2916 | case '*':
|
---|
2917 | L_d *= R_d;
|
---|
2918 | break;
|
---|
2919 | case '/':
|
---|
2920 | if (R_d == 0)
|
---|
2921 | syntax_error(EMSG_DIV_BY_ZERO);
|
---|
2922 | L_d /= R_d;
|
---|
2923 | break;
|
---|
2924 | case '&':
|
---|
2925 | if (ENABLE_FEATURE_AWK_LIBM)
|
---|
2926 | L_d = pow(L_d, R_d);
|
---|
2927 | else
|
---|
2928 | syntax_error(EMSG_NO_MATH);
|
---|
2929 | break;
|
---|
2930 | case '%':
|
---|
2931 | if (R_d == 0)
|
---|
2932 | syntax_error(EMSG_DIV_BY_ZERO);
|
---|
2933 | L_d -= (int)(L_d / R_d) * R_d;
|
---|
2934 | break;
|
---|
2935 | }
|
---|
2936 | debug_printf_eval("BINARY/REPLACE result:%f\n", L_d);
|
---|
2937 | res = setvar_i(((opinfo & OPCLSMASK) == OC_BINARY) ? res : L.v, L_d);
|
---|
2938 | break;
|
---|
2939 | }
|
---|
2940 |
|
---|
2941 | case XC( OC_COMPARE ): {
|
---|
2942 | int i = i; /* for compiler */
|
---|
2943 | double Ld;
|
---|
2944 |
|
---|
2945 | if (is_numeric(L.v) && is_numeric(R.v)) {
|
---|
2946 | Ld = getvar_i(L.v) - getvar_i(R.v);
|
---|
2947 | } else {
|
---|
2948 | const char *l = getvar_s(L.v);
|
---|
2949 | const char *r = getvar_s(R.v);
|
---|
2950 | Ld = icase ? strcasecmp(l, r) : strcmp(l, r);
|
---|
2951 | }
|
---|
2952 | switch (opn & 0xfe) {
|
---|
2953 | case 0:
|
---|
2954 | i = (Ld > 0);
|
---|
2955 | break;
|
---|
2956 | case 2:
|
---|
2957 | i = (Ld >= 0);
|
---|
2958 | break;
|
---|
2959 | case 4:
|
---|
2960 | i = (Ld == 0);
|
---|
2961 | break;
|
---|
2962 | }
|
---|
2963 | setvar_i(res, (i == 0) ^ (opn & 1));
|
---|
2964 | break;
|
---|
2965 | }
|
---|
2966 |
|
---|
2967 | default:
|
---|
2968 | syntax_error(EMSG_POSSIBLE_ERROR);
|
---|
2969 | }
|
---|
2970 | if ((opinfo & OPCLSMASK) <= SHIFT_TIL_THIS)
|
---|
2971 | op = op->a.n;
|
---|
2972 | if ((opinfo & OPCLSMASK) >= RECUR_FROM_THIS)
|
---|
2973 | break;
|
---|
2974 | if (nextrec)
|
---|
2975 | break;
|
---|
2976 | } /* while (op) */
|
---|
2977 |
|
---|
2978 | nvfree(v1);
|
---|
2979 | debug_printf_eval("returning from %s(): %p\n", __func__, res);
|
---|
2980 | return res;
|
---|
2981 | #undef fnargs
|
---|
2982 | #undef seed
|
---|
2983 | #undef sreg
|
---|
2984 | }
|
---|
2985 |
|
---|
2986 |
|
---|
2987 | /* -------- main & co. -------- */
|
---|
2988 |
|
---|
2989 | static int awk_exit(int r)
|
---|
2990 | {
|
---|
2991 | var tv;
|
---|
2992 | unsigned i;
|
---|
2993 | hash_item *hi;
|
---|
2994 |
|
---|
2995 | zero_out_var(&tv);
|
---|
2996 |
|
---|
2997 | if (!exiting) {
|
---|
2998 | exiting = TRUE;
|
---|
2999 | nextrec = FALSE;
|
---|
3000 | evaluate(endseq.first, &tv);
|
---|
3001 | }
|
---|
3002 |
|
---|
3003 | /* waiting for children */
|
---|
3004 | for (i = 0; i < fdhash->csize; i++) {
|
---|
3005 | hi = fdhash->items[i];
|
---|
3006 | while (hi) {
|
---|
3007 | if (hi->data.rs.F && hi->data.rs.is_pipe)
|
---|
3008 | pclose(hi->data.rs.F);
|
---|
3009 | hi = hi->next;
|
---|
3010 | }
|
---|
3011 | }
|
---|
3012 |
|
---|
3013 | exit(r);
|
---|
3014 | }
|
---|
3015 |
|
---|
3016 | /* if expr looks like "var=value", perform assignment and return 1,
|
---|
3017 | * otherwise return 0 */
|
---|
3018 | static int is_assignment(const char *expr)
|
---|
3019 | {
|
---|
3020 | char *exprc, *val;
|
---|
3021 |
|
---|
3022 | if (!isalnum_(*expr) || (val = strchr(expr, '=')) == NULL) {
|
---|
3023 | return FALSE;
|
---|
3024 | }
|
---|
3025 |
|
---|
3026 | exprc = xstrdup(expr);
|
---|
3027 | val = exprc + (val - expr);
|
---|
3028 | *val++ = '\0';
|
---|
3029 |
|
---|
3030 | unescape_string_in_place(val);
|
---|
3031 | setvar_u(newvar(exprc), val);
|
---|
3032 | free(exprc);
|
---|
3033 | return TRUE;
|
---|
3034 | }
|
---|
3035 |
|
---|
3036 | /* switch to next input file */
|
---|
3037 | static rstream *next_input_file(void)
|
---|
3038 | {
|
---|
3039 | #define rsm (G.next_input_file__rsm)
|
---|
3040 | #define files_happen (G.next_input_file__files_happen)
|
---|
3041 |
|
---|
3042 | FILE *F;
|
---|
3043 | const char *fname, *ind;
|
---|
3044 |
|
---|
3045 | if (rsm.F)
|
---|
3046 | fclose(rsm.F);
|
---|
3047 | rsm.F = NULL;
|
---|
3048 | rsm.pos = rsm.adv = 0;
|
---|
3049 |
|
---|
3050 | for (;;) {
|
---|
3051 | if (getvar_i(intvar[ARGIND])+1 >= getvar_i(intvar[ARGC])) {
|
---|
3052 | if (files_happen)
|
---|
3053 | return NULL;
|
---|
3054 | fname = "-";
|
---|
3055 | F = stdin;
|
---|
3056 | break;
|
---|
3057 | }
|
---|
3058 | ind = getvar_s(incvar(intvar[ARGIND]));
|
---|
3059 | fname = getvar_s(findvar(iamarray(intvar[ARGV]), ind));
|
---|
3060 | if (fname && *fname && !is_assignment(fname)) {
|
---|
3061 | F = xfopen_stdin(fname);
|
---|
3062 | break;
|
---|
3063 | }
|
---|
3064 | }
|
---|
3065 |
|
---|
3066 | files_happen = TRUE;
|
---|
3067 | setvar_s(intvar[FILENAME], fname);
|
---|
3068 | rsm.F = F;
|
---|
3069 | return &rsm;
|
---|
3070 | #undef rsm
|
---|
3071 | #undef files_happen
|
---|
3072 | }
|
---|
3073 |
|
---|
3074 | int awk_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
3075 | int awk_main(int argc, char **argv)
|
---|
3076 | {
|
---|
3077 | unsigned opt;
|
---|
3078 | char *opt_F;
|
---|
3079 | llist_t *list_v = NULL;
|
---|
3080 | llist_t *list_f = NULL;
|
---|
3081 | int i, j;
|
---|
3082 | var *v;
|
---|
3083 | var tv;
|
---|
3084 | char **envp;
|
---|
3085 | char *vnames = (char *)vNames; /* cheat */
|
---|
3086 | char *vvalues = (char *)vValues;
|
---|
3087 |
|
---|
3088 | INIT_G();
|
---|
3089 |
|
---|
3090 | /* Undo busybox.c, or else strtod may eat ','! This breaks parsing:
|
---|
3091 | * $1,$2 == '$1,' '$2', NOT '$1' ',' '$2' */
|
---|
3092 | if (ENABLE_LOCALE_SUPPORT)
|
---|
3093 | setlocale(LC_NUMERIC, "C");
|
---|
3094 |
|
---|
3095 | zero_out_var(&tv);
|
---|
3096 |
|
---|
3097 | /* allocate global buffer */
|
---|
3098 | g_buf = xmalloc(MAXVARFMT + 1);
|
---|
3099 |
|
---|
3100 | vhash = hash_init();
|
---|
3101 | ahash = hash_init();
|
---|
3102 | fdhash = hash_init();
|
---|
3103 | fnhash = hash_init();
|
---|
3104 |
|
---|
3105 | /* initialize variables */
|
---|
3106 | for (i = 0; *vnames; i++) {
|
---|
3107 | intvar[i] = v = newvar(nextword(&vnames));
|
---|
3108 | if (*vvalues != '\377')
|
---|
3109 | setvar_s(v, nextword(&vvalues));
|
---|
3110 | else
|
---|
3111 | setvar_i(v, 0);
|
---|
3112 |
|
---|
3113 | if (*vnames == '*') {
|
---|
3114 | v->type |= VF_SPECIAL;
|
---|
3115 | vnames++;
|
---|
3116 | }
|
---|
3117 | }
|
---|
3118 |
|
---|
3119 | handle_special(intvar[FS]);
|
---|
3120 | handle_special(intvar[RS]);
|
---|
3121 |
|
---|
3122 | newfile("/dev/stdin")->F = stdin;
|
---|
3123 | newfile("/dev/stdout")->F = stdout;
|
---|
3124 | newfile("/dev/stderr")->F = stderr;
|
---|
3125 |
|
---|
3126 | /* Huh, people report that sometimes environ is NULL. Oh well. */
|
---|
3127 | if (environ) for (envp = environ; *envp; envp++) {
|
---|
3128 | /* environ is writable, thus we don't strdup it needlessly */
|
---|
3129 | char *s = *envp;
|
---|
3130 | char *s1 = strchr(s, '=');
|
---|
3131 | if (s1) {
|
---|
3132 | *s1 = '\0';
|
---|
3133 | /* Both findvar and setvar_u take const char*
|
---|
3134 | * as 2nd arg -> environment is not trashed */
|
---|
3135 | setvar_u(findvar(iamarray(intvar[ENVIRON]), s), s1 + 1);
|
---|
3136 | *s1 = '=';
|
---|
3137 | }
|
---|
3138 | }
|
---|
3139 | opt_complementary = "v::f::"; /* -v and -f can occur multiple times */
|
---|
3140 | opt = getopt32(argv, "F:v:f:W:", &opt_F, &list_v, &list_f, NULL);
|
---|
3141 | argv += optind;
|
---|
3142 | argc -= optind;
|
---|
3143 | if (opt & 0x1) { /* -F */
|
---|
3144 | unescape_string_in_place(opt_F);
|
---|
3145 | setvar_s(intvar[FS], opt_F);
|
---|
3146 | }
|
---|
3147 | while (list_v) { /* -v */
|
---|
3148 | if (!is_assignment(llist_pop(&list_v)))
|
---|
3149 | bb_show_usage();
|
---|
3150 | }
|
---|
3151 | if (list_f) { /* -f */
|
---|
3152 | do {
|
---|
3153 | char *s = NULL;
|
---|
3154 | FILE *from_file;
|
---|
3155 |
|
---|
3156 | g_progname = llist_pop(&list_f);
|
---|
3157 | from_file = xfopen_stdin(g_progname);
|
---|
3158 | /* one byte is reserved for some trick in next_token */
|
---|
3159 | for (i = j = 1; j > 0; i += j) {
|
---|
3160 | s = xrealloc(s, i + 4096);
|
---|
3161 | j = fread(s + i, 1, 4094, from_file);
|
---|
3162 | }
|
---|
3163 | s[i] = '\0';
|
---|
3164 | fclose(from_file);
|
---|
3165 | parse_program(s + 1);
|
---|
3166 | free(s);
|
---|
3167 | } while (list_f);
|
---|
3168 | argc++;
|
---|
3169 | } else { // no -f: take program from 1st parameter
|
---|
3170 | if (!argc)
|
---|
3171 | bb_show_usage();
|
---|
3172 | g_progname = "cmd. line";
|
---|
3173 | parse_program(*argv++);
|
---|
3174 | }
|
---|
3175 | if (opt & 0x8) // -W
|
---|
3176 | bb_error_msg("warning: option -W is ignored");
|
---|
3177 |
|
---|
3178 | /* fill in ARGV array */
|
---|
3179 | setvar_i(intvar[ARGC], argc);
|
---|
3180 | setari_u(intvar[ARGV], 0, "awk");
|
---|
3181 | i = 0;
|
---|
3182 | while (*argv)
|
---|
3183 | setari_u(intvar[ARGV], ++i, *argv++);
|
---|
3184 |
|
---|
3185 | evaluate(beginseq.first, &tv);
|
---|
3186 | if (!mainseq.first && !endseq.first)
|
---|
3187 | awk_exit(EXIT_SUCCESS);
|
---|
3188 |
|
---|
3189 | /* input file could already be opened in BEGIN block */
|
---|
3190 | if (!iF)
|
---|
3191 | iF = next_input_file();
|
---|
3192 |
|
---|
3193 | /* passing through input files */
|
---|
3194 | while (iF) {
|
---|
3195 | nextfile = FALSE;
|
---|
3196 | setvar_i(intvar[FNR], 0);
|
---|
3197 |
|
---|
3198 | while ((i = awk_getline(iF, intvar[F0])) > 0) {
|
---|
3199 | nextrec = FALSE;
|
---|
3200 | incvar(intvar[NR]);
|
---|
3201 | incvar(intvar[FNR]);
|
---|
3202 | evaluate(mainseq.first, &tv);
|
---|
3203 |
|
---|
3204 | if (nextfile)
|
---|
3205 | break;
|
---|
3206 | }
|
---|
3207 |
|
---|
3208 | if (i < 0)
|
---|
3209 | syntax_error(strerror(errno));
|
---|
3210 |
|
---|
3211 | iF = next_input_file();
|
---|
3212 | }
|
---|
3213 |
|
---|
3214 | awk_exit(EXIT_SUCCESS);
|
---|
3215 | /*return 0;*/
|
---|
3216 | }
|
---|