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39 lines (34 loc) · 732 Bytes
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Copy pathstrcmp.c
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39 lines (34 loc) · 732 Bytes
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/* from Henry Spencer's stringlib */
/* modified by ERS */
#include <string.h>
#include <compiler.h>
#ifdef __LATTICE__
#undef strcmp
#endif
/*
* strcmp - compare string s1 to s2
*/
int /* <0 for <, 0 for ==, >0 for > */
strcmp(const char *scan1, const char *scan2)
{
int c1, c2;
if (!scan1)
return scan2 ? -1 : 0;
if (!scan2) return 1;
do {
c1 = *scan1++; c2 = *scan2++;
} while (c1 && c1 == c2);
/*
* The following case analysis is necessary so that characters
* which look negative collate low against normal characters but
* high against the end-of-string NUL.
*/
if (c1 == c2)
return(0);
else if (c1 == '\0')
return(-1);
else if (c2 == '\0')
return(1);
else
return(c1 - c2);
}