You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
32 lines
665 B
C
32 lines
665 B
C
#include "str.h"
|
|
|
|
size_t str_chr(const char *in, char needle) {
|
|
register const char* t=in;
|
|
register const char c=needle;
|
|
for (;;) {
|
|
if (!*t || *t==c) break;
|
|
++t;
|
|
if (!*t || *t==c) break;
|
|
++t;
|
|
if (!*t || *t==c) break;
|
|
++t;
|
|
if (!*t || *t==c) break;
|
|
++t;
|
|
}
|
|
return (size_t)(t-in);
|
|
}
|
|
|
|
#ifdef UNITTEST
|
|
#include <assert.h>
|
|
#include <string.h>
|
|
|
|
int main() {
|
|
char buf[100];
|
|
strcpy(buf,"abcdefghijklmnopqrstuvwxyz");
|
|
size_t i;
|
|
for (i=0; i<26; ++i)
|
|
assert(str_chr(buf,buf[i])==i);
|
|
assert(str_chr(buf,'X')==26);
|
|
}
|
|
#endif
|