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42 lines
924 B
C
42 lines
924 B
C
#include "str.h"
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size_t str_rchr(const char *in, char needle) {
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#if 1
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size_t i,j=-1;
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for (i=0; in[i]; ++i) if (in[i]==needle) j=i;
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return i<j ? i : j;
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#else
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register const char* t=in;
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register const char c=needle;
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register const char* found=0;
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for (;;) {
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if (!*t) break;
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if (*t==c) found=t;
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++t;
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if (!*t) break;
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if (*t==c) found=t;
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++t;
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if (!*t) break;
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if (*t==c) found=t;
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++t;
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if (!*t) break;
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if (*t==c) found=t;
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++t;
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}
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return (size_t)((found?found:t)-in);
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#endif
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}
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#ifdef UNITTEST
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#include <assert.h>
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int main() {
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assert(str_rchr("fnord",'r')==3);
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assert(str_rchr("frord",'r')==3);
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assert(str_rchr("fnord",'x')==5);
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return 0;
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}
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#endif
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