[1054] | 1 | /*
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| 2 | * $Id$
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| 3 | *
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| 4 | * New generation of string handling functions safe from a memory management point of view
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| 5 | * Developped by Andree Leidenfrost
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| 6 | */
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| 7 |
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[1924] | 8 | #include <stdlib.h>
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[1054] | 9 | #include <stdio.h>
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| 10 | #include <string.h>
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[1087] | 11 | #include <time.h>
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[1054] | 12 |
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| 13 | #include "mr_mem.h"
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[3892] | 14 | #include "mr_str.h"
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[3171] | 15 |
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| 16 | // to get bool type
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| 17 | #define _MY_STUFF_H_
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| 18 | #include "my-stuff.h"
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[1054] | 19 |
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| 20 | /**
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[1594] | 21 | * Safe alternative to standard function strtok()
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[1054] | 22 | * @param instr
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| 23 | * @param delims
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| 24 | * @param lastpos
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| 25 | * @return @p
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| 26 | * @note this function allocates memory that needs to be freed by caller
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| 27 | **/
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[3614] | 28 | char *mr_strtok(char *instr, const char *delims, int *lastpos) {
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[1054] | 29 |
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[3614] | 30 | char *token = NULL;
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| 31 | char *strptr = NULL;
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| 32 | size_t pos1 = 0;
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| 33 | size_t pos2 = 0;
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[1054] | 34 |
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[3614] | 35 | if (instr == NULL) {
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| 36 | *lastpos = 0;
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| 37 | return token;
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| 38 | }
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[2970] | 39 |
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[3614] | 40 | if (delims == NULL) {
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| 41 | *lastpos = 0;
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| 42 | return token;
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| 43 | }
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[2972] | 44 |
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[3614] | 45 | if (strlen(instr) <= *lastpos) {
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| 46 | *lastpos = 0;
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| 47 | return token;
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| 48 | }
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[1054] | 49 |
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[3614] | 50 | strptr = instr + *lastpos;
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| 51 | pos2 = strspn(strptr, delims);
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| 52 | strptr += pos2;
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| 53 | pos1 = strcspn(strptr, delims);
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| 54 | token = (char *)mr_malloc(sizeof(*token) * (pos1 + 1));
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[3892] | 55 | mr_strncpy(token, strptr, pos1);
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[3614] | 56 | token[pos1] = '\0';
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| 57 | *lastpos = *lastpos + pos1 + pos2 + 1;
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[1054] | 58 |
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[3614] | 59 | return token;
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[1054] | 60 | }
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| 61 |
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| 62 |
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| 63 | /**
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| 64 | * Returns the string fed to it 'inptr' with all characters to escape given
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| 65 | * in 'toesc' prepended by escaping character 'escchr'.
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| 66 | * (Prepare strings for use in system() or popen() with this function.)
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| 67 | * @param instr
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| 68 | * @param toesc
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| 69 | * @param escchr
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| 70 | * @note this function allocates memory that needs to be freed by caller
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| 71 | **/
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[3171] | 72 | char *mr_stresc(char *instr, char *toesc, const char escchr, const char specialchr) {
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[1054] | 73 |
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[3614] | 74 | char *inptr = NULL;
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| 75 | char *retstr = NULL;
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| 76 | char *retptr = NULL;
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| 77 | char *escptr = NULL;
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| 78 | int cnt = 0;
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| 79 | bool found = FALSE;
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| 80 |
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| 81 | inptr = instr;
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| 82 | // Count how many characters need escaping.
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| 83 | while (*inptr != '\0') {
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| 84 | escptr = toesc;
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| 85 | while (*escptr != '\0') {
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| 86 | if (*inptr == *escptr) {
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| 87 | // Found it, skip the rest.
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| 88 | cnt++;
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| 89 | // if specialchar (' or ") then replace it with '\'' or "\"" so adds 2 chars
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| 90 | if (*inptr == specialchr) {
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| 91 | cnt += 2;
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[1054] | 92 | }
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[3614] | 93 | break;
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[1054] | 94 | }
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[3614] | 95 | escptr++;
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[1054] | 96 | }
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[3614] | 97 | inptr++;
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| 98 | }
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[3171] | 99 |
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[3614] | 100 | inptr = instr;
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| 101 | retstr = (char *) mr_malloc(strlen(inptr) + cnt + 1);
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| 102 | retptr = retstr;
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[1054] | 103 |
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[3614] | 104 | // Prepend specified characters with escape character.
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| 105 | while (*inptr != '\0') {
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| 106 | escptr = toesc;
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| 107 | while (*escptr != '\0') {
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| 108 | if (*inptr == *escptr) {
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| 109 | // Found it, skip the rest.
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| 110 | // if specialchar (' or ") then replace it with '\'' or "\"" so adds 2 chars
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| 111 | if (*inptr == specialchr) {
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| 112 | *retptr = specialchr;
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| 113 | retptr++;
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| 114 | *retptr = escchr;
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| 115 | retptr++;
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| 116 | found = TRUE;
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| 117 | } else {
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| 118 | *retptr = escchr;
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| 119 | retptr++;
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[1054] | 120 | }
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[3614] | 121 | break;
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[1054] | 122 | }
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[3614] | 123 | escptr++;
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| 124 | }
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| 125 | *retptr = *inptr;
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| 126 | retptr++;
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| 127 | inptr++;
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| 128 | if (found) {
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| 129 | // finish to put the remaining specialchr
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| 130 | *retptr = specialchr;
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[1054] | 131 | retptr++;
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[3614] | 132 | found = FALSE;
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[1054] | 133 | }
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[3614] | 134 | }
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| 135 | *retptr = '\0';
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[1054] | 136 |
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[3614] | 137 | return(retstr);
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[1054] | 138 | }
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[1087] | 139 |
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| 140 | /* Return a string containing the date */
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| 141 | char *mr_date(void) {
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| 142 |
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[3614] | 143 | time_t tcurr;
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| 144 |
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| 145 | tcurr = time(NULL);
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| 146 | return(ctime(&tcurr));
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[1087] | 147 | }
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| 148 |
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[3193] | 149 | /* Return an allocated string containing the date
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| 150 | char *mr_date(void) {
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| 151 |
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| 152 | time_t tcurr;
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| 153 | char *tmp = NULL;
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[1168] | 154 |
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[3193] | 155 | tcurr = time(NULL);
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| 156 | mr_asprintf(tmp, "%s", ctime(&tcurr));
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| 157 | mr_chomp(tmp);
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| 158 | return(tmp);
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| 159 | }
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| 160 | */
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| 161 |
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[1168] | 162 | /**
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| 163 | * Remove all characters whose ASCII value is less than or equal to 32
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[3614] | 164 | * (spaces and control characters) from both sides of @p instr.
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| 165 | * @param instr The string to strip spaces/control characters from
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| 166 | * returns a newly allocated string without the spaces that needs to be freed
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| 167 | * by the caller
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[1168] | 168 | */
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[3614] | 169 | char *mr_strip_spaces(const char *instr) {
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[1168] | 170 |
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[3614] | 171 | char *q = NULL;
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| 172 | char *outstr = NULL;
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[1168] | 173 |
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[3614] | 174 | if (instr == NULL) {
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| 175 | return(NULL);
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| 176 | }
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[1205] | 177 |
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[3614] | 178 | /* Skip initial spaces and special chars */
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[3627] | 179 | while (*instr <= ' ' && *instr != '\0') {
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| 180 | instr++;
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[3614] | 181 | }
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[3723] | 182 |
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[3724] | 183 | if (*instr == '\0') {
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[3723] | 184 | mr_asprintf(outstr, "");
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| 185 | return(outstr);
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| 186 | }
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| 187 |
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[3627] | 188 | mr_asprintf(outstr, "%s", instr);
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[3723] | 189 | q = outstr + strlen(outstr) - 1;
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[1168] | 190 |
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[3614] | 191 | /* Skip final spaces and special chars */
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| 192 | while (*q <= ' ' && q != outstr) {
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| 193 | q--;
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[1168] | 194 | }
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[3193] | 195 |
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[3614] | 196 | /* The string now ends after that char */
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| 197 | q++;
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| 198 | *q = '\0';
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| 199 | return(outstr);
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| 200 | }
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| 201 |
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[3794] | 202 | /* Subsitute the string "token" in the string "in" by the string "subst" */
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[3294] | 203 | char *mr_str_substitute(const char *in, const char *token, const char *subst) {
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[3193] | 204 |
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[3294] | 205 | char *output = NULL;
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| 206 | char *tmp = NULL;
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| 207 | int i = 0;
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| 208 |
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| 209 | mr_asprintf(output, "%s", in);
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| 210 | tmp = strstr(output, token);
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| 211 | if (tmp == NULL) {
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| 212 | // token not found returning initial string unmodified
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| 213 | return(output);
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| 214 | }
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[3641] | 215 | // token found: end string here for now
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[3294] | 216 | *tmp = '\0';
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| 217 |
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| 218 | // Add subst content to the string
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| 219 | mr_strcat(output,subst);
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| 220 |
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| 221 | // now add the rest of in
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| 222 | tmp = strstr(in, token);
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| 223 | for (; i < strlen(token) ; i++) {
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| 224 | tmp++;
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| 225 | }
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| 226 | mr_strcat(output,tmp);
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| 227 | return(output);
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| 228 | }
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| 229 |
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| 230 |
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[3193] | 231 | /*
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| 232 | * Remove '\n' char from both sides of @p in_out.
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| 233 | * @param in_out The string to strip characters from (modified).
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| 234 |
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| 235 | void mr_chomp(char *in_out) {
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| 236 |
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| 237 | mr_strip_char(in_out, "\n");
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| 238 | }
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| 239 | */
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| 240 |
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| 241 | /**
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| 242 | * Remove all characters in caracs from begining and end of string @p in_out
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| 243 | * @param in_out The string to strip char characters from (modified).
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| 244 |
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| 245 | void mr_strip_char(char *in_out, char *caracs) {
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| 246 | int i = 0;
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| 247 | int j = 0;
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| 248 | size_t length = 0;
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| 249 |
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| 250 | if (caracs == NULL) {
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| 251 | return;
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| 252 | }
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| 253 | if (in_out == NULL) {
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| 254 | return;
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| 255 | }
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| 256 | length = strlen(in_out);
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| 257 |
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[3194] | 258 | // Skip initial caracs
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[3193] | 259 | for (i = 0; index(caracs, in_out[i]) != NULL && i < (int)length ; i++);
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| 260 |
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[3194] | 261 | // Shift the string to the begining if needed
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[3193] | 262 | if (i != 0) {
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| 263 | for (j = 0; i < (int)length ; i++, j++) {
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| 264 | in_out[j] = in_out[i];
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| 265 | }
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[3194] | 266 | // Erase the end of the string if needed
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[3193] | 267 | j++;
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| 268 | in_out[j] = '\0';
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| 269 | }
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| 270 |
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[3194] | 271 | // Skip final caracs
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[3193] | 272 | for (i = (int)strlen(in_out) - 1; i >= 0 && index(caracs, in_out[i]) != NULL; i--);
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| 273 |
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[3194] | 274 | // The string now ends after that char
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[3193] | 275 | i++;
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| 276 | in_out[i] = '\0';
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| 277 | }
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| 278 | */
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| 279 |
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