fjstrrch.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 97 行

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


/**
*
*  Name:        _fjstrrchr
*
*  Synopsis:    p = _fjstrrchr( s, c );
*
*               FJSTRING p;     暥帤偺億僀儞僞
*               FJSTRING s;     暥帤楍
*               JMOJI c;        暥帤
*
*  Description: 暥帤楍倱傪弴偵専嶕偟丄嵟弶偵暥帤們偲堦抳偟偨
*               埵抲偺億僀儞僞傪曉偡丅倞倱倲倰們倛倰偼愭摢偐傜
*               専嶕偟丄倞倱倲倰倰們倛倰偼嵟屻偐傜専嶕偡傞丅
*
*  Returns:     堦抳偑側偐偭偨応崌偼僰儖億僀儞僞傪曉偡丅
*
*
*  Name:        _fjstrrchr      search out specified letter from the string
*
*  Synopsis:    p = _fjstrrchr( s, c );
*
*               FJSTRING        p;      return value which point to the
*                                       searched out letter
*               JSTRING s;      pointer to the string which is referenced
*               JMOJI   c;      the value of searching letter
*
*  Description: The _fjstrrchr function locates the final occurrence of "c"
*               in the string pointed to by "s". _fstrrchr function start to
*               search out from the end of string, and jstrchr function
*               start to search out from the top of string.
*               If you specify "c" with KANJI letter, JMOJI consist with 16
*               bit and its' high byte consist with first byte code of KANJI
*               letter, and low byte consist with second byte code of KANJI
*               letter. If second byte code is NULL then the first byte code
*               also consider to NULL. If you specify "c" with 1 byte character
*               then, it must be in the low byte of JMOJI and the high byte of
*               JMOJI has to NULL. This function is a data independent form
*               that accept far pointer argunments. It is most useful in mix
*               memory model applications.
*
*  Returns:     This function returns a pointer to the located letter, or NULL
*               if the letter does not occur in the string.
*
**/


_WCRTLINK FJSTRING _WCI86FAR _fjstrrchr( const JCHAR _WCFAR *s, JMOJI c )
{
    const JCHAR _WCFAR *p, _WCFAR *ss;
    JMOJI cc;

    p = (FJSTRING) NULL;
    while( 1 ) {
        ss = _fjgetmoji( s, (JMOJI _WCFAR *)&cc );
        if( cc == 0 ) break;
        if( cc == c ) p = s;
        s = ss;
    }
    return( (FJSTRING) p );
}