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361 lines
7.6 KiB
C
361 lines
7.6 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "xp.h"
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#include "xp_str.h"
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#include <ctype.h>
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#include <stdarg.h>
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#ifdef PROFILE
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#pragma profile on
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#endif
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#if !defined(XP_WIN) && !defined(XP_OS2) /* keep this out of the winfe */
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#if defined(DEBUG)
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char *
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NOT_NULL (const char * p)
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{
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XP_ASSERT(p);
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return (char*) p;
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}
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#endif
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#endif
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#define TOLOWER_TABLE_SIZE 128
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PRIVATE uint8 *
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xp_get_tolower_table()
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{
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static uint8 tolower_table[TOLOWER_TABLE_SIZE];
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static XP_Bool first_time = TRUE;
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if(first_time)
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{
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int i;
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first_time = FALSE;
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/* build the tolower_table */
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for(i=0; i < sizeof(tolower_table); i++)
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{
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tolower_table[i] = (uint8) tolower((char)i);
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}
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}
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return tolower_table;
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}
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PRIVATE uint8 *
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xp_get_toupper_table()
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{
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static uint8 toupper_table[TOLOWER_TABLE_SIZE];
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static XP_Bool first_time = TRUE;
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if(first_time)
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{
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int i;
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first_time = FALSE;
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/* build the tolower_table */
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for(i=0; i < sizeof(toupper_table); i++)
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{
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toupper_table[i] = (uint8) toupper((char)i);
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}
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}
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return toupper_table;
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}
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#define XP_STR_TOUPPER(c) (c < TOLOWER_TABLE_SIZE ? toupper_table[c] : c)
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#define XP_STR_TOLOWER(c) (c < TOLOWER_TABLE_SIZE ? tolower_table[c] : c)
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/* fast table driven tolower routine
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*
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* We only deal with 7 bit ascii
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*/
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PUBLIC int
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xp_tolower(int c)
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{
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uint8 *tolower_table = xp_get_tolower_table();
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return XP_STR_TOLOWER(c);
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}
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/* fast table driven toupper routine
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*
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* We only deal with 7 bit ascii
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*/
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PUBLIC int
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xp_toupper(int c)
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{
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uint8 *toupper_table = xp_get_toupper_table();
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return XP_STR_TOUPPER(c);
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}
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/* find a substring within a string with a case insensitive search
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*/
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PUBLIC char *
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strcasestr (const char * str, const char * substr)
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{
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register const char *pA;
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register const char *pB;
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register const char *pC;
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uint8 *toupper_table = xp_get_toupper_table();
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if(!str)
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return(NULL);
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for(pA=str; *pA; pA++)
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{
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if(XP_STR_TOUPPER(*pA) == XP_STR_TOUPPER(*substr))
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{
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for(pB=pA, pC=substr; ; pB++, pC++)
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{
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if(!(*pC))
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return((char *)pA);
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if(!(*pB))
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break;
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if(XP_STR_TOUPPER(*pB) != XP_STR_TOUPPER(*pC))
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break;
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}
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}
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}
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return(NULL);
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}
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/* find a char within a specified length string
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*/
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PUBLIC char *
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strnchr (const char * str, const char single, int32 len)
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{
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register int count=0;
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register const char *pA;
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if(!str)
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return(NULL);
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for(pA=str; count < len; pA++, count++)
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{
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if(*pA == single)
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{
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return((char *)pA);
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}
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if(!(*pA))
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return(NULL);
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}
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return(NULL);
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}
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/* find a substring within a specified length string with a case
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* insensitive search
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*/
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PUBLIC char *
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strncasestr (const char * str, const char * substr, int32 len)
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{
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register int count=0;
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register int count2=0;
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register const char *pA;
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register const char *pB;
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register const char *pC;
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uint8 *toupper_table = xp_get_toupper_table();
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if(!str || !substr)
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return(NULL);
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for(pA=str; count < len; pA++, count++)
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{
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if(XP_STR_TOUPPER(*pA) == XP_STR_TOUPPER(*substr))
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{
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for(pB=pA, pC=substr, count2=count; count2<len;
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count2++,pB++,pC++)
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{
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if(!(*pC))
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return((char *)pA);
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if(!(*pB))
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break;
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if(XP_TO_UPPER(*pB) != XP_TO_UPPER(*pC))
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break;
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}
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}
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}
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return(NULL);
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}
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/* compare strings in a case insensitive manner
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*/
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PUBLIC int
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strcasecomp (const char* one, const char *two)
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{
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const char *pA;
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const char *pB;
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uint8 *toupper_table = xp_get_toupper_table();
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for(pA=one, pB=two; *pA && *pB; pA++, pB++)
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{
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register int tmp = XP_STR_TOUPPER(*pA) - XP_STR_TOUPPER(*pB);
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if (tmp)
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return tmp;
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}
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if (*pA)
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return 1;
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if (*pB)
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return -1;
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return 0;
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}
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/* compare strings in a case insensitive manner with a length limit
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*/
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PUBLIC int
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strncasecomp (const char* one, const char * two, int n)
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{
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const char *pA;
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const char *pB;
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uint8 *toupper_table = xp_get_toupper_table();
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for(pA=one, pB=two;; pA++, pB++)
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{
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int tmp;
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if (pA == one+n)
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return 0;
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if (!(*pA && *pB))
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return *pA - *pB;
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tmp = XP_STR_TOUPPER(*pA) - XP_STR_TOUPPER(*pB);
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if (tmp)
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return tmp;
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}
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}
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/************************************************************************
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* These are "safe" versions of the runtime library routines. The RTL
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* versions do not null-terminate dest IFF strlen(src) >= destLength.
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* These versions always null-terminate, which is why they're safe.
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*/
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char *XP_STRNCAT_SAFE (char *dest, const char *src, size_t maxToCat)
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{
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int destLen;
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char *result;
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destLen = XP_STRLEN (dest);
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result = strncat (dest, src, --maxToCat);
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dest[destLen + maxToCat] = '\0';
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return result;
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}
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char *XP_STRNCPY_SAFE (char *dest, const char *src, size_t destLength)
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{
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char *result = strncpy (dest, src, --destLength);
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dest[destLength] = '\0';
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return result;
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}
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/*************************************************
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The following functions are used to implement
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a thread safe strtok
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*************************************************/
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/*
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* Get next token from string *stringp, where tokens are (possibly empty)
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* strings separated by characters from delim. Tokens are separated
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* by exactly one delimiter iff the skip parameter is false; otherwise
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* they are separated by runs of characters from delim, because we
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* skip over any initial `delim' characters.
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*
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* Writes NULs into the string at *stringp to end tokens.
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* delim will usually, but need not, remain CONSTant from call to call.
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* On return, *stringp points past the last NUL written (if there might
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* be further tokens), or is NULL (if there are definitely no more tokens).
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*
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* If *stringp is NULL, strtoken returns NULL.
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*/
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static
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char *strtoken_r(char ** stringp, const char *delim, int skip)
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{
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char *s;
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const char *spanp;
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int c, sc;
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char *tok;
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if ((s = *stringp) == NULL)
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return (NULL);
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if (skip) {
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/*
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* Skip (span) leading delimiters (s += strspn(s, delim)).
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*/
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cont:
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c = *s;
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for (spanp = delim; (sc = *spanp++) != 0;) {
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if (c == sc) {
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s++;
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goto cont;
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}
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}
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if (c == 0) { /* no token found */
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*stringp = NULL;
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return (NULL);
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}
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}
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/*
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* Scan token (scan for delimiters: s += strcspn(s, delim), sort of).
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* Note that delim must have one NUL; we stop if we see that, too.
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*/
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for (tok = s;;) {
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c = *s++;
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spanp = delim;
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do {
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if ((sc = *spanp++) == c) {
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if (c == 0)
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s = NULL;
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else
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s[-1] = 0;
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*stringp = s;
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return( (char *) tok );
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}
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} while (sc != 0);
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}
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/* NOTREACHED */
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}
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char *XP_STRTOK_R(char *s1, const char *s2, char **lasts)
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{
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if (s1)
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*lasts = s1;
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return (strtoken_r(lasts, s2, 1));
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}
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#ifdef PROFILE
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#pragma profile off
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#endif
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