74 lines
1014 B
C
74 lines
1014 B
C
#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <stdlib.h>
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char *mu_parse_escape(const char *prog_name, const char *src) {
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size_t size = 0;
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size_t src_len = strlen(src);
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for (size_t i = 0; i < src_len; i++) {
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size++;
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size -= (src[i] == '\\');
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}
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char *buf = malloc(size + 1);
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if (buf == NULL) {
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if (prog_name)
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fprintf(stderr, "%s: malloc: %s\n", prog_name, strerror(errno));
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return NULL;
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}
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size = 0;
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for (size_t i = 0; i < src_len; i++) {
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char c = src[i];
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if (c == '\\' && i < src_len) {
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switch (src[i + 1]) {
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case 'n':
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c = '\n';
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break;
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case 'a':
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c = '\a';
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break;
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case 't':
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c = '\t';
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break;
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case 'b':
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c = '\b';
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break;
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case 'e':
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c = '\033';
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break;
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case 'r':
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c = '\r';
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break;
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case 'f':
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c = '\f';
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break;
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case 'v':
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c = '\v';
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break;
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default:
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c = '\\';
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}
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i++;
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}
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buf[size] = c;
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size++;
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}
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buf[size + 1] = '\0';
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return buf;
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}
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