зеркало из https://github.com/mozilla/gecko-dev.git
436 строки
13 KiB
C++
436 строки
13 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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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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#include "nsIServiceManager.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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//----------------------------------------------------------------------
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char nsCRT::ToUpper(char aChar)
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{
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return (char)kLower2Upper[(unsigned char)aChar];
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}
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char nsCRT::ToLower(char aChar)
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{
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return (char)kUpper2Lower[(unsigned char)aChar];
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}
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PRBool nsCRT::IsUpper(char aChar)
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{
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return aChar != nsCRT::ToLower(aChar);
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}
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PRBool nsCRT::IsLower(char aChar)
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{
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return aChar != nsCRT::ToUpper(aChar);
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}
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////////////////////////////////////////////////////////////////////////////////
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// My lovely strtok routine
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#define IS_DELIM(m, c) ((m)[(c) >> 3] & (1 << ((c) & 7)))
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#define SET_DELIM(m, c) ((m)[(c) >> 3] |= (1 << ((c) & 7)))
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#define DELIM_TABLE_SIZE 32
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char* nsCRT::strtok(char* string, const char* delims, char* *newStr)
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{
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NS_ASSERTION(string, "Unlike regular strtok, the first argument cannot be null.");
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char delimTable[DELIM_TABLE_SIZE];
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PRUint32 i;
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char* result;
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char* str = string;
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for (i = 0; i < DELIM_TABLE_SIZE; i++)
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delimTable[i] = '\0';
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for (i = 0; delims[i]; i++) {
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SET_DELIM(delimTable, NS_STATIC_CAST(PRUint8, delims[i]));
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}
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NS_ASSERTION(delims[i] == '\0', "too many delimiters");
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// skip to beginning
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while (*str && IS_DELIM(delimTable, NS_STATIC_CAST(PRUint8, *str))) {
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str++;
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}
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result = str;
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// fix up the end of the token
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while (*str) {
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if (IS_DELIM(delimTable, NS_STATIC_CAST(PRUint8, *str))) {
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*str++ = '\0';
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break;
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}
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str++;
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}
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*newStr = str;
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return str == result ? NULL : result;
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}
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////////////////////////////////////////////////////////////////////////////////
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PRUint32 nsCRT::strlen(const PRUnichar* s)
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{
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PRUint32 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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* NOTE: We terminate the search upon encountering a NULL
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*
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* @update gess 11/10/99
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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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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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else {
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if (s1) // s2 must have been null
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return -1;
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if (s2) // s1 must have been null
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return 1;
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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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* NOTE: We DO NOT terminate the search upon encountering NULL's before N
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*
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* @update gess 11/10/99
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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, PRUint32 n) {
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if(s1 && s2) {
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if(n != 0) {
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do {
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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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} while (--n != 0);
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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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PRUint32 len = nsCRT::strlen(str);
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return strndup(str, len);
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}
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PRUnichar* nsCRT::strndup(const PRUnichar* str, PRUint32 len)
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{
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nsCppSharedAllocator<PRUnichar> shared_allocator;
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PRUnichar* rslt = shared_allocator.allocate(len + 1); // add one for the null
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// PRUnichar* rslt = new PRUnichar[len + 1];
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if (rslt == NULL) return NULL;
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memcpy(rslt, str, len * sizeof(PRUnichar));
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rslt[len] = 0;
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return rslt;
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}
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/**
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* |nsCRT::HashCode| is identical to |PL_HashString|, which tests
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* (http://bugzilla.mozilla.org/showattachment.cgi?attach_id=26596)
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* show to be the best hash among several other choices.
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*
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* We re-implement it here rather than calling it for two reasons:
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* (1) in this interface, we also calculate the length of the
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* string being hashed; and (2) the narrow and wide and `buffer' versions here
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* will hash equivalent strings to the same value, e.g., "Hello" and L"Hello".
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*/
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PRUint32 nsCRT::HashCode(const char* str, PRUint32* resultingStrLen)
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{
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PRUint32 h = 0;
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const char* s = str;
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if (!str) return h;
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unsigned char c;
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while ( (c = *s++) )
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h = (h>>28) ^ (h<<4) ^ c;
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if ( resultingStrLen )
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*resultingStrLen = (s-str)-1;
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return h;
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}
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PRUint32 nsCRT::HashCode(const PRUnichar* str, PRUint32* resultingStrLen)
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{
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PRUint32 h = 0;
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const PRUnichar* s = str;
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if (!str) return h;
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PRUnichar c;
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while ( (c = *s++) )
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h = (h>>28) ^ (h<<4) ^ c;
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if ( resultingStrLen )
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*resultingStrLen = (s-str)-1;
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return h;
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}
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PRUint32 nsCRT::BufferHashCode(const PRUnichar* s, PRUint32 len)
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{
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PRUint32 h = 0;
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const PRUnichar* done = s + len;
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while ( s < done )
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h = (h>>28) ^ (h<<4) ^ PRUint16(*s++); // cast to unsigned to prevent possible sign extension
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return h;
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}
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// This should use NSPR but NSPR isn't exporting its PR_strtoll function
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// Until then...
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PRInt64 nsCRT::atoll(const char *str)
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{
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if (!str)
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return LL_Zero();
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PRInt64 ll = LL_Zero(), digitll = LL_Zero();
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while (*str && *str >= '0' && *str <= '9') {
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LL_MUL(ll, ll, 10);
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LL_UI2L(digitll, (*str - '0'));
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LL_ADD(ll, ll, digitll);
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str++;
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}
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return ll;
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}
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/**
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* Determine if given char in valid ascii range
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*
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* @update ftang 04.27.2000
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* @param aChar is character to be tested
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* @return TRUE if in ASCII range
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*/
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PRBool nsCRT::IsAscii(PRUnichar aChar) {
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return (0x0080 > aChar);
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}
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/**
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* Determine if given char in valid ascii range
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*
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* @update ftang 10.02.2001
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* @param aString is null terminated to be tested
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* @return TRUE if all characters aare in ASCII range
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*/
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PRBool nsCRT::IsAscii(const PRUnichar *aString) {
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while(*aString) {
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if( 0x0080 <= *aString)
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return PR_FALSE;
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aString++;
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}
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return PR_TRUE;
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}
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/**
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* Determine if given char in valid ascii range
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*
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* @update ftang 10.02.2001
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* @param aString is null terminated to be tested
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* @return TRUE if all characters aare in ASCII range
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*/
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PRBool nsCRT::IsAscii(const char *aString) {
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while(*aString) {
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if( 0x80 & *aString)
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return PR_FALSE;
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aString++;
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}
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return PR_TRUE;
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}
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/**
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* Determine whether the given string consists of valid ascii chars
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*
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* @param aString is null terminated
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* @param aLength is the number of chars to test. This must be at most
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* the number of chars in aString before the null terminator
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* @return PR_TRUE if all chars are valid ASCII chars, PR_FALSE otherwise
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*/
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PRBool nsCRT::IsAscii(const char* aString, PRUint32 aLength)
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{
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const char* end = aString + aLength;
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while (aString < end) {
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NS_ASSERTION(*aString, "Null byte before end of data!");
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if (0x80 & *aString)
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return PR_FALSE;
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++aString;
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}
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return PR_TRUE;
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}
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/**
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* Determine if given char in valid alpha range
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*
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* @update rickg 03.10.2000
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* @param aChar is character to be tested
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* @return TRUE if in alpha range
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*/
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PRBool nsCRT::IsAsciiAlpha(PRUnichar aChar) {
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// XXX i18n
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if (((aChar >= 'A') && (aChar <= 'Z')) || ((aChar >= 'a') && (aChar <= 'z'))) {
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return PR_TRUE;
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}
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return PR_FALSE;
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}
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/**
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* Determine if given char is a valid space character
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*
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* @update rickg 03.10.2000
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* @param aChar is character to be tested
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* @return TRUE if is valid space char
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*/
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PRBool nsCRT::IsAsciiSpace(PRUnichar aChar) {
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// XXX i18n
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if ((aChar == ' ') || (aChar == '\r') || (aChar == '\n') || (aChar == '\t')) {
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return PR_TRUE;
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}
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return PR_FALSE;
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}
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/**
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* Determine if given char is valid digit
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*
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* @update rickg 03.10.2000
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* @param aChar is character to be tested
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* @return TRUE if char is a valid digit
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*/
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PRBool nsCRT::IsAsciiDigit(PRUnichar aChar) {
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// XXX i18n
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return PRBool((aChar >= '0') && (aChar <= '9'));
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}
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