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11#include "libbb.h"
12
13unsigned FAST_FUNC count_strstr(const char *str, const char *sub)
14{
15 size_t sub_len = strlen(sub);
16 unsigned count = 0;
17
18 while ((str = strstr(str, sub)) != NULL) {
19 count++;
20 str += sub_len;
21 }
22 return count;
23}
24
25char* FAST_FUNC xmalloc_substitute_string(const char *src, int count, const char *sub, const char *repl)
26{
27 char *buf, *dst, *end;
28 size_t sub_len = strlen(sub);
29 size_t repl_len = strlen(repl);
30
31
32
33 buf = dst = xmalloc(strlen(src) + count * ((int)repl_len - (int)sub_len) + 1);
34
35 while ((end = strstr(src, sub)) != NULL) {
36 dst = mempcpy(dst, src, end - src);
37 dst = mempcpy(dst, repl, repl_len);
38
39 src = end + sub_len;
40 }
41 strcpy(dst, src);
42
43 return buf;
44}
45