jstrncmp.c

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C语言 代码 · 共 89 行

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*
*                            Open Watcom Project
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#include "variety.h"
#include <jstring.h>


/**
*
*  Name:        jstrncmp        暥帤楍偺斾妑
*
*  Synopsis:    x = jstrncmp( a, b, n );
*
*               int x;          寢壥
*               JSTRING a, b;   暥帤楍
*               int n;          暥帤悢
*
*  Description: 俀偮偺暥帤楍傪斾妑偡傞丅倞倱倲倰値們倣倫偼愭摢偐傜
*               値暥帤暘偺傒偺斾妑傪偡傞丅
*               俙俶俲暥帤丂亙丂僇僫暥帤丂亙丂娍帤暥帤丂偺戝彫娭學偵
*               偵側偭偰偄傞丅
*
*  Returns:     暥帤楍倎偺曽偑倐傛傝傕彫偝偄応崌偼晧悢傪丄戝偒偄応崌
*               偼惓悢傪曉偟丄倎偲倐偑摍偟偄偲偒偼侽傪曉偡丅
*
*
*  Name:        jstrncmp        compare strings with in KANJI letters
*
*  Synopsis:    x = jstrncmp( a, b, n );
*
*               int     x;      resoult as compared
*               JSTRING a, b;   two strings for compare each other
*               int     n;      length for comparison
*
*  Description: The jstrncmp function compares the KANJI string pointed to
*               by "a" to the string pointed to by "b".
*               This function compares only "n" letters from top of the strings.
*               The rule of comparison is as below.
*                 ASCII and numeric letter < KATAKANA letter < KANJI letter
*
*  Returns:     The jstrncmp function returns an integer less than, equal to,
*               or greater than zero, indicating that the string pointed to
*               by "a" is less than, equal to, or greater than the string
*               pointed to by "b".
*
**/

_WCRTLINK int jstrncmp( const JCHAR *a, const JCHAR *b, size_t n )
{
    JMOJI aa, bb;

    while( n-- ) {
        a = jgetmoji( a, &aa );
        b = jgetmoji( b, &bb );
        if( aa != bb ) return( ( aa < bb ) ? -1 : 1 );
        if( aa == 0 ) break;
    }
    return( 0 );
}