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10#include "libbb.h"
11
12static char *xmalloc_fgets_internal(FILE *file, const char *terminating_string, int chop_off, size_t *maxsz_p)
13{
14 char *linebuf = NULL;
15 const int term_length = strlen(terminating_string);
16 int end_string_offset;
17 int linebufsz = 0;
18 int idx = 0;
19 int ch;
20 size_t maxsz = maxsz_p ? *maxsz_p : INT_MAX - 4095;
21
22 while (1) {
23 ch = fgetc(file);
24 if (ch == EOF) {
25 if (idx == 0)
26 return linebuf;
27 break;
28 }
29
30 if (idx >= linebufsz) {
31 linebufsz += 200;
32 linebuf = xrealloc(linebuf, linebufsz);
33 if (idx >= maxsz) {
34 linebuf[idx] = ch;
35 idx++;
36 break;
37 }
38 }
39
40 linebuf[idx] = ch;
41 idx++;
42
43
44 end_string_offset = idx - term_length;
45 if (end_string_offset >= 0
46 && memcmp(&linebuf[end_string_offset], terminating_string, term_length) == 0
47 ) {
48 if (chop_off)
49 idx -= term_length;
50 break;
51 }
52 }
53
54 linebuf = xrealloc(linebuf, idx + 1);
55 linebuf[idx] = '\0';
56 if (maxsz_p)
57 *maxsz_p = idx;
58 return linebuf;
59}
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64
65char* FAST_FUNC xmalloc_fgets_str(FILE *file, const char *terminating_string)
66{
67 return xmalloc_fgets_internal(file, terminating_string, 0, NULL);
68}
69
70char* FAST_FUNC xmalloc_fgets_str_len(FILE *file, const char *terminating_string, size_t *maxsz_p)
71{
72 return xmalloc_fgets_internal(file, terminating_string, 0, maxsz_p);
73}
74
75char* FAST_FUNC xmalloc_fgetline_str(FILE *file, const char *terminating_string)
76{
77 return xmalloc_fgets_internal(file, terminating_string, 1, NULL);
78}
79