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v0.8.1
https://github.com/python/cpython
09 December 2020, 11:06:31 UTC
Revision bfdcd436f0410e2b3eb34ce4fd7411488d3f13fb authored by Serhiy Storchaka on 13 October 2013, 20:09:14 UTC, committed by Serhiy Storchaka on 13 October 2013, 20:09:14 UTC 
Issue #18758: Fixed and improved cross-references.
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Tip revision: bfdcd436f0410e2b3eb34ce4fd7411488d3f13fb authored by Serhiy Storchaka on 13 October 2013, 20:09:14 UTC
Issue #18758: Fixed and improved cross-references.
Tip revision: bfdcd43
pystrcmp.c 
/* Cross platform case insensitive string compare functions
 */

#include "Python.h"

int
PyOS_mystrnicmp(const char *s1, const char *s2, Py_ssize_t size)
{
    if (size == 0)
        return 0;
    while ((--size > 0) &&
           (tolower((unsigned)*s1) == tolower((unsigned)*s2))) {
        if (!*s1++ || !*s2++)
            break;
    }
    return tolower((unsigned)*s1) - tolower((unsigned)*s2);
}

int
PyOS_mystricmp(const char *s1, const char *s2)
{
    while (*s1 && (tolower((unsigned)*s1++) == tolower((unsigned)*s2++))) {
        ;
    }
    return (tolower((unsigned)*s1) - tolower((unsigned)*s2));
}
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