[1054] | 1 | /*
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| 2 | * $Id$
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| 3 | *
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| 4 | * Code (c)2006 Bruno Cornec <bruno@mondorescue.org>
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| 5 | *
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| 6 | * Main file of mr_mem : a very small and simple
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| 7 | * library for memory management
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| 8 | *
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| 9 | * Provided under the GPLv2
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| 10 | */
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| 11 |
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[1064] | 12 | #ifndef _GNU_SOURCE
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| 13 | #define _GNU_SOURCE
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| 14 | #endif
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| 15 |
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[1054] | 16 | #include <stdio.h>
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| 17 | #include <stdlib.h>
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| 18 |
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| 19 | #include "mr_err.h"
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| 20 | #include "mr_msg.h"
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| 21 |
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| 22 | /*
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| 23 | * Function that frees memory if necessary
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[1104] | 24 | * A pointer to the memory pointed is passed to it.
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| 25 | * *allocated variable points then to the original content
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| 26 | * pointed to by the caller
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[2241] | 27 | * In case of NULL pointer it just logs it
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[1054] | 28 | */
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[1104] | 29 | void mr_free_int(void **allocated, int line, const char *file) {
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[1054] | 30 |
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| 31 | /* free man pages says that if allocated is NULL
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| 32 | * nothing happens
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| 33 | */
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[1104] | 34 | if (*allocated != NULL) {
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| 35 | free(*allocated);
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| 36 | *allocated = NULL;
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| 37 | } else {
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[2241] | 38 | mr_msg_int(8,line,file,"Attempt to free NULL pointer");
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[1104] | 39 | }
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[1054] | 40 | }
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| 41 |
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| 42 | /* encapsulation function for malloc */
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[1104] | 43 | void *mr_malloc_int(size_t size, int line, const char *file) {
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[1054] | 44 |
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| 45 | void *ret;
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| 46 |
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| 47 | ret = malloc(size);
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| 48 | if (ret == NULL) {
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[1133] | 49 | mr_msg_int(1,line,file,"Unable to alloc memory in mr_malloc\nExiting...");
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[1104] | 50 | mr_exit(-1,"Unable to alloc memory in mr_malloc");
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[1054] | 51 | }
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| 52 | return(ret);
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| 53 | }
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| 54 |
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| 55 | /* encapsulation function for asprintf */
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[1104] | 56 | void mr_asprintf_int(char **strp, int line, const char *file, const char *fmt, ...) {
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[1054] | 57 |
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| 58 | int res = 0;
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[1064] | 59 | va_list args;
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[1054] | 60 |
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[1064] | 61 | va_start(args,fmt);
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[1054] | 62 | res = vasprintf(strp, fmt, args);
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| 63 | if (res == -1) {
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[1133] | 64 | mr_msg_int(1,line,file,"Unable to alloc memory in mr_asprintf\nExiting...");
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[1104] | 65 | mr_exit(-1,"Unable to alloc memory in mr_asprintf");
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[1054] | 66 | }
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[1064] | 67 | va_end(args);
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[1054] | 68 | }
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| 69 |
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[3127] | 70 | /* encapsulation function for getline */
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| 71 | void mr_getline_int(char **lineptr, FILE *fd, int line, const char *file) {
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| 72 |
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| 73 | ssize_t ret;
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| 74 | size_t n = 0;
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| 75 |
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[3292] | 76 | if (*lineptr != NULL) {
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| 77 | /* free a variable which should be already free */
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| 78 | mr_msg_int(1,line,file,"mr_getline_ found a non freed variable here");
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[3294] | 79 | mr_free_int((void **)lineptr,line,file);
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[3292] | 80 | }
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[3127] | 81 | ret = getline(lineptr,&n,fd);
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[3208] | 82 | if ((ret == -1) && (! feof(fd))) {
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[3127] | 83 | mr_msg_int(1,line,file,"Unable to alloc memory in mr_getline\nExiting...");
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| 84 | mr_exit(-1,"Unable to alloc memory in mr_getline");
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| 85 | }
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[3208] | 86 | /* We reached end of file, allocating empty string */
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| 87 | if (ret == -1) {
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[3294] | 88 | mr_free_int((void **)lineptr,line,file);
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[3292] | 89 | mr_asprintf_int(lineptr,line,file,"");
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[3208] | 90 | }
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[3127] | 91 | }
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| 92 |
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[1054] | 93 | /*
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| 94 | * Function that properly allocates a string from another one
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| 95 | * freeing it before in any case
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| 96 | */
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[1104] | 97 | void mr_allocstr_int(char *alloc, const char *orig, int line, const char *file) {
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[1054] | 98 |
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[1174] | 99 | if (alloc != NULL) {
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| 100 | mr_free_int((void **)&alloc, line, file);
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| 101 | }
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[1104] | 102 | mr_asprintf_int(&alloc, line, file, orig);
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[1054] | 103 | }
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[1152] | 104 |
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| 105 | /*
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| 106 | * Function that properly put a variable in the environment
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| 107 | */
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| 108 | void mr_setenv_int(const char *name, const char *value, int line, char *file) {
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| 109 |
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| 110 | if (name == NULL) {
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| 111 | mr_msg_int(1,line,file,"Unable to setenv a NULL variable\nExiting...");
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| 112 | mr_exit(-1, "Unable to setenv a NULL variable");
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| 113 | }
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| 114 | if (value == NULL) {
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| 115 | mr_msg_int(1,line,file,"Unable to affect NULL to %s\nExiting...", name);
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| 116 | mr_exit(-1, "Unable to affect a NULL variable");
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| 117 | }
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[1156] | 118 | if (setenv(name, value, 1) != 0) {
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[1152] | 119 | mr_msg_int(1,line,file,"Unable to put %s in environment", name);
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| 120 | mr_exit(-1,"Unable to put in environment");
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| 121 | }
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| 122 | }
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[1178] | 123 |
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| 124 | /*
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| 125 | * Equivalent function of strcat but safe
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| 126 | * from memory allocation point of view
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[1196] | 127 | * and richer from an interface point of view
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[1178] | 128 | */
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[1196] | 129 | void mr_strcat_int(char **in, int line, const char *file, const char *fmt, ...) {
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| 130 | char *fmt2 = NULL;
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| 131 | va_list args;
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| 132 | int res = 0;
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[1178] | 133 |
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[1196] | 134 | if (fmt == NULL) {
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[1178] | 135 | return;
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| 136 | }
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| 137 | if (in == NULL) {
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[1196] | 138 | mr_msg_int(1,line,file,"Unable to add to NULL pointer\nExiting...");
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[1178] | 139 | mr_exit(-1, "Unable to add to a NULL pointer");
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| 140 | }
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[1196] | 141 | va_start(args,fmt);
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[1178] | 142 | if (*in == NULL) {
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[1196] | 143 | res = vasprintf(in, fmt, args);
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| 144 | if (res == -1) {
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| 145 | mr_msg_int(1,line,file,"Unable to alloc memory in mr_strcat\nExiting...");
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| 146 | mr_exit(-1,"Unable to alloc memory in mr_strcat");
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| 147 | }
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[1178] | 148 | } else {
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[1196] | 149 | mr_asprintf_int(&fmt2, line, file, "%s%s", *in, fmt);
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[2308] | 150 | mr_free_int((void **)in,line,file);
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| 151 | res = vasprintf(in, fmt2, args);
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| 152 | if (res == -1) {
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| 153 | mr_msg_int(1,line,file,"Unable to alloc memory in mr_strcat\nExiting...");
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| 154 | mr_exit(-1,"Unable to alloc memory in mr_strcat");
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| 155 | }
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[1196] | 156 | mr_free_int((void **)&fmt2,line,file);
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[1178] | 157 | }
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[1196] | 158 | va_end(args);
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[1178] | 159 | }
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[1196] | 160 |
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| 161 |
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