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Atari Mega Archive 1
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mntlib44.zoo
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wcscmp.c
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C/C++ Source or Header
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1993-10-20
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2KB
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80 lines
/* from Henry Spencer's stringlib */
/* modified by ERS */
#include <stddef.h>
#include <stdlib.h>
/*
* wcscmp - compare string s1 to s2
*/
int /* <0 for <, 0 for ==, >0 for > */
wcscmp(scan1, scan2)
register const wchar_t *scan1;
register const wchar_t *scan2;
{
register wchar_t c1, c2;
if (scan1 == NULL)
return scan2 == NULL ? 0 : -1;
if (scan2 == NULL) 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)
return(-1);
else if (!c2)
return(1);
else
return(c1 - c2);
}
/*
* wcsncmp - compare at most n characters of string s1 to s2
*/
int /* <0 for <, 0 for ==, >0 for > */
wcsncmp(scan1, scan2, n)
register const wchar_t *scan1;
register const wchar_t *scan2;
size_t n;
{
register wchar_t c1, c2;
register long count;
if (scan1 == NULL) {
return scan2 == NULL ? 0 : -1;
}
if (scan2 == NULL) return 1;
count = n;
do {
c1 = *scan1++; c2 = *scan2++;
} while (--count >= 0 && c1 && c1 == c2);
if (count < 0)
return(0);
/*
* 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)
return(-1);
else if (!c2)
return(1);
else
return(c1 - c2);
}