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410 lines
12 KiB
C++
410 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 2; 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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/**
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* MODULE NOTES:
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* @update gess7/30/98
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*
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* Much as I hate to do it, we were using string compares wrong.
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* Often, programmers call functions like strcmp(s1,s2), and pass
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* one or more null strings. Rather than blow up on these, I've
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* added quick checks to ensure that cases like this don't cause
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* us to fail.
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*
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* In general, if you pass a null into any of these string compare
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* routines, we simply return 0.
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*/
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#include "nsCRT.h"
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// XXX Bug: These tables don't lowercase the upper 128 characters properly
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// This table maps uppercase characters to lower case characters;
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// characters that are neither upper nor lower case are unaffected.
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static const unsigned char kUpper2Lower[256] = {
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
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16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
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48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
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64,
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// upper band mapped to lower [A-Z] => [a-z]
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97, 98, 99,100,101,102,103,104,105,106,107,108,109,110,111,
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112,113,114,115,116,117,118,119,120,121,122,
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91, 92, 93, 94, 95,
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96, 97, 98, 99,100,101,102,103,104,105,106,107,108,109,110,111,
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112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,
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128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,
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144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,
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160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,
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176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,
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192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,
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208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,
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224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,
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240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255
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};
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static const unsigned char kLower2Upper[256] = {
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
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16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
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48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
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64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
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80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
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96,
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// lower band mapped to upper [a-z] => [A-Z]
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65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
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80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90,
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123,124,125,126,127,
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128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,
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144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,
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160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,
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176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,
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192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,
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208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,
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224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,
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240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255
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};
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// XXX bug: this doesn't map 0x80 to 0x9f properly
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static const PRUnichar kIsoLatin1ToUCS2[256] = {
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
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16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
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48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
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64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
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80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
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96, 97, 98, 99,100,101,102,103,104,105,106,107,108,109,110,111,
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112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,
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128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,
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144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,
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160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,
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176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,
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192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,
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208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,
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224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,
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240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255
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};
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//----------------------------------------------------------------------
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#define TOLOWER(_ucs2) \
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(((_ucs2) < 256) ? PRUnichar(kUpper2Lower[_ucs2]) : _ToLower(_ucs2))
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#define TOUPPER(_ucs2) \
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(((_ucs2) < 256) ? PRUnichar(kLower2Upper[_ucs2]) : _ToUpper(_ucs2))
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static PRUnichar _ToLower(PRUnichar aChar)
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{
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// XXX need i18n code here
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return aChar;
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}
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static PRUnichar _ToUpper(PRUnichar aChar)
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{
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// XXX need i18n code here
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return aChar;
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}
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//----------------------------------------------------------------------
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PRUnichar nsCRT::ToUpper(PRUnichar aChar)
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{
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return TOUPPER(aChar);
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}
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PRUnichar nsCRT::ToLower(PRUnichar aChar)
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{
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return TOLOWER(aChar);
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}
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PRInt32 nsCRT::strlen(const PRUnichar* s)
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{
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PRInt32 len = 0;
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if(s) {
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while (*s++ != 0) {
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len++;
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}
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}
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return len;
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}
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/**
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* Compare unichar string ptrs, stopping at the 1st null
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* NOTE: If both are null, we return 0.
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* @update gess7/30/98
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* @param s1 and s2 both point to unichar strings
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* @return 0 if they match, -1 if s1<s2; 1 if s1>s2
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*/
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PRInt32 nsCRT::strcmp(const PRUnichar* s1, const PRUnichar* s2)
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{
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if(s1 && s2) {
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for (;;) {
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PRUnichar c1 = *s1++;
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PRUnichar c2 = *s2++;
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if (c1 != c2) {
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if (c1 < c2) return -1;
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return 1;
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}
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if ((0==c1) || (0==c2)) break;
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}
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}
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return 0;
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}
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/**
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* Compare unichar string ptrs, stopping at the 1st null or nth char.
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* NOTE: If either is null, we return 0.
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* @update gess7/30/98
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* @param s1 and s2 both point to unichar strings
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* @return 0 if they match, -1 if s1<s2; 1 if s1>s2
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*/
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PRInt32 nsCRT::strncmp(const PRUnichar* s1, const PRUnichar* s2, PRInt32 n)
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{
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if(s1 && s2) {
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if(0<n) {
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while (--n >= 0) {
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PRUnichar c1 = *s1++;
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PRUnichar c2 = *s2++;
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if (c1 != c2) {
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if (c1 < c2) return -1;
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return 1;
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}
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if ((0==c1) || (0==c2)) break;
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}
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}
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}
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return 0;
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}
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/**
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* Compare unichar string ptrs without regard to case
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* NOTE: If both are null, we return 0.
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* @update gess7/30/98
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* @param s1 and s2 both point to unichar strings
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* @return 0 if they match, -1 if s1<s2; 1 if s1>s2
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*/
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PRInt32 nsCRT::strcasecmp(const PRUnichar* s1, const PRUnichar* s2)
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{
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if(s1 && s2) {
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for (;;) {
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PRUnichar c1 = *s1++;
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PRUnichar c2 = *s2++;
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if (c1 != c2) {
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c1 = TOLOWER(c1);
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c2 = TOLOWER(c2);
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if (c1 != c2) {
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if (c1 < c2) return -1;
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return 1;
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}
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}
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if ((0==c1) || (0==c2)) break;
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}
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}
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return 0;
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}
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/**
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* Compare unichar string ptrs, stopping at the 1st null or nth char;
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* also ignoring the case of characters.
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* NOTE: If both are null, we return 0.
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* @update gess7/30/98
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* @param s1 and s2 both point to unichar strings
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* @return 0 if they match, -1 if s1<s2; 1 if s1>s2
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*/
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PRInt32 nsCRT::strncasecmp(const PRUnichar* s1, const PRUnichar* s2, PRInt32 n)
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{
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if(s1 && s2) {
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if(0<n){
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while (--n >= 0) {
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PRUnichar c1 = *s1++;
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PRUnichar c2 = *s2++;
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if (c1 != c2) {
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c1 = TOLOWER(c1);
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c2 = TOLOWER(c2);
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if (c1 != c2) {
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if (c1 < c2) return -1;
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return 1;
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}
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}
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if ((0==c1) || (0==c2)) break;
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}
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}
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}
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return 0;
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}
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/**
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* Compare a unichar string ptr to cstring.
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* NOTE: If both are null, we return 0.
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* @update gess7/30/98
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* @param s1 points to unichar string
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* @param s2 points to cstring
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* @return 0 if they match, -1 if s1<s2; 1 if s1>s2
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*/
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PRInt32 nsCRT::strcmp(const PRUnichar* s1, const char* s2)
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{
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if(s1 && s2) {
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for (;;) {
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PRUnichar c1 = *s1++;
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PRUnichar c2 = kIsoLatin1ToUCS2[*(const unsigned char*)s2++];
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if (c1 != c2) {
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if (c1 < c2) return -1;
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return 1;
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}
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if ((0==c1) || (0==c2)) break;
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}
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}
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return 0;
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}
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/**
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* Compare a unichar string ptr to cstring, up to N chars.
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* NOTE: If both are null, we return 0.
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* @update gess7/30/98
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* @param s1 points to unichar string
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* @param s2 points to cstring
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* @return 0 if they match, -1 if s1<s2; 1 if s1>s2
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*/
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PRInt32 nsCRT::strncmp(const PRUnichar* s1, const char* s2, PRInt32 n)
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{
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if(s1 && s2) {
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if(0<n){
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while (--n >= 0) {
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PRUnichar c1 = *s1++;
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PRUnichar c2 = kIsoLatin1ToUCS2[*(const unsigned char*)s2++];
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if (c1 != c2) {
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if (c1 < c2) return -1;
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return 1;
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}
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if ((0==c1) || (0==c2)) break;
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}
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}
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}
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return 0;
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}
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/**
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* Compare a unichar string ptr to cstring without regard to case
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* NOTE: If both are null, we return 0.
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* @update gess7/30/98
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* @param s1 points to unichar string
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* @param s2 points to cstring
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* @return 0 if they match, -1 if s1<s2; 1 if s1>s2
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*/
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PRInt32 nsCRT::strcasecmp(const PRUnichar* s1, const char* s2)
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{
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if(s1 && s2) {
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for (;;) {
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PRUnichar c1 = *s1++;
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PRUnichar c2 = kIsoLatin1ToUCS2[*(const unsigned char*)s2++];
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if (c1 != c2) {
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c1 = TOLOWER(c1);
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c2 = TOLOWER(c2);
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if (c1 != c2) {
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if (c1 < c2) return -1;
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return 1;
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}
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}
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if ((0==c1) || (0==c2)) break;
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}
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}
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return 0;
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}
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/**
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* Caseless compare up to N chars between unichar string ptr to cstring.
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* NOTE: If both are null, we return 0.
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* @update gess7/30/98
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* @param s1 points to unichar string
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* @param s2 points to cstring
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* @return 0 if they match, -1 if s1<s2; 1 if s1>s2
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*/
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PRInt32 nsCRT::strncasecmp(const PRUnichar* s1, const char* s2, PRInt32 n)
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{
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if(s1 && s2){
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if(0<n){
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while (--n >= 0) {
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PRUnichar c1 = *s1++;
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PRUnichar c2 = kIsoLatin1ToUCS2[*(const unsigned char*)s2++];
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if (c1 != c2) {
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c1 = TOLOWER(c1);
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c2 = TOLOWER(c2);
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if (c1 != c2) {
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if (c1 < c2) return -1;
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return 1;
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}
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}
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if (c1 == 0) break;
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}
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}
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}
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return 0;
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}
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PRUnichar* nsCRT::strdup(const PRUnichar* str)
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{
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PRInt32 len = nsCRT::strlen(str) + 1; // add one for null
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PRUnichar* rslt = new PRUnichar[len];
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if (rslt == NULL) return NULL;
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nsCRT::memcpy(rslt, str, len * sizeof(PRUnichar));
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return rslt;
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}
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PRUint32 nsCRT::HashValue(const PRUnichar* us)
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{
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PRUint32 rv = 0;
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if(us) {
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PRUnichar ch;
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while ((ch = *us++) != 0) {
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// FYI: rv = rv*37 + ch
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rv = ((rv << 5) + (rv << 2) + rv) + ch;
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}
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}
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return rv;
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}
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PRUint32 nsCRT::HashValue(const PRUnichar* us, PRInt32* uslenp)
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{
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PRUint32 rv = 0;
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PRInt32 len = 0;
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PRUnichar ch;
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while ((ch = *us++) != 0) {
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// FYI: rv = rv*37 + ch
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rv = ((rv << 5) + (rv << 2) + rv) + ch;
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len++;
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}
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*uslenp = len;
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return rv;
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}
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PRInt32 nsCRT::atoi( const PRUnichar *string )
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{
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return atoi(string);
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}
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