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gecko-dev/xpcom/ds/nsCRT.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
/**
* MODULE NOTES:
* @update gess7/30/98
*
* Much as I hate to do it, we were using string compares wrong.
* Often, programmers call functions like strcmp(s1,s2), and pass
* one or more null strings. Rather than blow up on these, I've
* added quick checks to ensure that cases like this don't cause
* us to fail.
*
* In general, if you pass a null into any of these string compare
* routines, we simply return 0.
*/
#include "nsCRT.h"
#include "nsIServiceManager.h"
#ifndef XPCOM_STANDALONE
#include "nsUnicharUtilCIID.h"
#include "nsICaseConversion.h"
#endif /* XPCOM_STANDALONE */
// XXX Bug: These tables don't lowercase the upper 128 characters properly
// This table maps uppercase characters to lower case characters;
// characters that are neither upper nor lower case are unaffected.
static const unsigned char kUpper2Lower[256] = {
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
64,
// upper band mapped to lower [A-Z] => [a-z]
97, 98, 99,100,101,102,103,104,105,106,107,108,109,110,111,
112,113,114,115,116,117,118,119,120,121,122,
91, 92, 93, 94, 95,
96, 97, 98, 99,100,101,102,103,104,105,106,107,108,109,110,111,
112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,
128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,
144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,
160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,
176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,
192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,
208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,
224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,
240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255
};
static const unsigned char kLower2Upper[256] = {
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
96,
// lower band mapped to upper [a-z] => [A-Z]
65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90,
123,124,125,126,127,
128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,
144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,
160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,
176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,
192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,
208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,
224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,
240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255
};
// XXX bug: this doesn't map 0x80 to 0x9f properly
const PRUnichar kIsoLatin1ToUCS2[256] = {
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
96, 97, 98, 99,100,101,102,103,104,105,106,107,108,109,110,111,
112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,
128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,
144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,
160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,
176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,
192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,
208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,
224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,
240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255
};
//----------------------------------------------------------------------
#define TOLOWER(_ucs2) \
(((_ucs2) < 128) ? PRUnichar(kUpper2Lower[_ucs2]) : _ToLower(_ucs2))
#define TOUPPER(_ucs2) \
(((_ucs2) < 128) ? PRUnichar(kLower2Upper[_ucs2]) : _ToUpper(_ucs2))
#ifndef XPCOM_STANDALONE
static NS_DEFINE_CID(kUnicharUtilCID, NS_UNICHARUTIL_CID);
extern nsICaseConversion * gCaseConv;
#ifdef STANDALONE_STRING_TESTS
static nsICaseConversion* gCaseConv;
#endif
static void CheckCaseConversion()
{
#ifndef STANDALONE_STRING_TESTS
if (NULL == gCaseConv)
(void) nsServiceManager::GetService(kUnicharUtilCID, NS_GET_IID(nsICaseConversion),
(nsISupports**) &gCaseConv);
#endif
NS_ASSERTION( gCaseConv != NULL , "cannot obtain UnicharUtil");
}
#endif /* XPCOM_STANDALONE */
static PRUnichar _ToLower(PRUnichar aChar)
{
#ifndef XPCOM_STANDALONE
PRUnichar oLower;
CheckCaseConversion();
nsresult err = gCaseConv->ToLower(aChar, &oLower);
NS_ASSERTION( NS_SUCCEEDED(err), "failed to communicate to UnicharUtil");
return ( NS_SUCCEEDED(err) ) ? oLower : aChar ;
#else
return aChar;
#endif /* XPCOM_STANDALONE */
}
static PRUnichar _ToUpper(PRUnichar aChar)
{
#ifndef XPCOM_STANDALONE
nsresult err;
PRUnichar oUpper;
CheckCaseConversion();
err = gCaseConv->ToUpper(aChar, &oUpper);
NS_ASSERTION( NS_SUCCEEDED(err), "failed to communicate to UnicharUtil");
return ( NS_SUCCEEDED(err) ) ? oUpper : aChar ;
#else
return aChar;
#endif /* XPCOM_STANDALONE */
}
//----------------------------------------------------------------------
PRUnichar nsCRT::ToUpper(PRUnichar aChar)
{
return TOUPPER(aChar);
}
PRUnichar nsCRT::ToLower(PRUnichar aChar)
{
return TOLOWER(aChar);
}
PRBool nsCRT::IsUpper(PRUnichar aChar)
{
return aChar != nsCRT::ToLower(aChar);
}
PRBool nsCRT::IsLower(PRUnichar aChar)
{
return aChar != nsCRT::ToUpper(aChar);
}
char nsCRT::ToUpper(char aChar)
{
return (char)kLower2Upper[aChar];
}
char nsCRT::ToLower(char aChar)
{
return (char)kUpper2Lower[aChar];
}
PRBool nsCRT::IsUpper(char aChar)
{
return aChar != nsCRT::ToLower(aChar);
}
PRBool nsCRT::IsLower(char aChar)
{
return aChar != nsCRT::ToUpper(aChar);
}
////////////////////////////////////////////////////////////////////////////////
// My lovely strtok routine
#define IS_DELIM(m, c) ((m)[(c) >> 3] & (1 << ((c) & 7)))
#define SET_DELIM(m, c) ((m)[(c) >> 3] |= (1 << ((c) & 7)))
#define DELIM_TABLE_SIZE 32
char* nsCRT::strtok(char* string, const char* delims, char* *newStr)
{
NS_ASSERTION(string, "Unlike regular strtok, the first argument cannot be null.");
char delimTable[DELIM_TABLE_SIZE];
PRUint32 i;
char* result;
char* str = string;
for (i = 0; i < DELIM_TABLE_SIZE; i++)
delimTable[i] = '\0';
for (i = 0; i < DELIM_TABLE_SIZE && delims[i]; i++) {
SET_DELIM(delimTable, delims[i]);
}
NS_ASSERTION(delims[i] == '\0', "too many delimiters");
// skip to beginning
while (*str && IS_DELIM(delimTable, *str)) {
str++;
}
result = str;
// fix up the end of the token
while (*str) {
if (IS_DELIM(delimTable, *str)) {
*str++ = '\0';
break;
}
str++;
}
*newStr = str;
return str == result ? NULL : result;
}
////////////////////////////////////////////////////////////////////////////////
PRUint32 nsCRT::strlen(const PRUnichar* s)
{
PRUint32 len = 0;
if(s) {
while (*s++ != 0) {
len++;
}
}
return len;
}
/**
* Compare unichar string ptrs, stopping at the 1st null
* NOTE: If both are null, we return 0.
* NOTE: We terminate the search upon encountering a NULL
*
* @update gess 11/10/99
* @param s1 and s2 both point to unichar strings
* @return 0 if they match, -1 if s1<s2; 1 if s1>s2
*/
PRInt32 nsCRT::strcmp(const PRUnichar* s1, const PRUnichar* s2) {
if(s1 && s2) {
for (;;) {
PRUnichar c1 = *s1++;
PRUnichar c2 = *s2++;
if (c1 != c2) {
if (c1 < c2) return -1;
return 1;
}
if ((0==c1) || (0==c2)) break;
}
}
else {
if (s1) // s2 must have been null
return -1;
if (s2) // s1 must have been null
return 1;
}
return 0;
}
/**
* Compare unichar string ptrs, stopping at the 1st null or nth char.
* NOTE: If either is null, we return 0.
* NOTE: We DO NOT terminate the search upon encountering NULL's before N
*
* @update gess 11/10/99
* @param s1 and s2 both point to unichar strings
* @return 0 if they match, -1 if s1<s2; 1 if s1>s2
*/
PRInt32 nsCRT::strncmp(const PRUnichar* s1, const PRUnichar* s2, PRUint32 n) {
if(s1 && s2) {
if(n != 0) {
do {
PRUnichar c1 = *s1++;
PRUnichar c2 = *s2++;
if (c1 != c2) {
if (c1 < c2) return -1;
return 1;
}
} while (--n != 0);
}
}
return 0;
}
/**
* Compare unichar string ptrs without regard to case
* NOTE: If both are null, we return 0.
* NOTE: We terminate the search upon encountering NULL
*
* @update gess 11/10/99
* @param s1 and s2 both point to unichar strings
* @return 0 if they match, -1 if s1<s2; 1 if s1>s2
*/
PRInt32 nsCRT::strcasecmp(const PRUnichar* s1, const PRUnichar* s2) {
if(s1 && s2) {
for (;;) {
PRUnichar c1 = *s1++;
PRUnichar c2 = *s2++;
if (c1 != c2) {
c1 = TOLOWER(c1);
c2 = TOLOWER(c2);
if (c1 != c2) {
if (c1 < c2) return -1;
return 1;
}
}
if ((0==c1) || (0==c2)) break;
}
}
return 0;
}
/**
* Compare unichar string ptrs, stopping at the 1st null or nth char;
* also ignoring the case of characters.
* NOTE: If both are null, we return 0.
* NOTE: We DO NOT terminate the search upon encountering NULL's before N
*
* @update gess 11/10/99
* @param s1 and s2 both point to unichar strings
* @return 0 if they match, -1 if s1<s2; 1 if s1>s2
*/
PRInt32 nsCRT::strncasecmp(const PRUnichar* s1, const PRUnichar* s2, PRUint32 n) {
if(s1 && s2) {
if(n != 0){
do {
PRUnichar c1 = *s1++;
PRUnichar c2 = *s2++;
if (c1 != c2) {
c1 = TOLOWER(c1);
c2 = TOLOWER(c2);
if (c1 != c2) {
if (c1 < c2) return -1;
return 1;
}
}
} while (--n != 0);
}
}
return 0;
}
/**
* Compare a unichar string ptr to cstring.
* NOTE: If both are null, we return 0.
* NOTE: We terminate the search upon encountering NULL's
*
* @update gess7/30/98
* @param s1 points to unichar string
* @param s2 points to cstring
* @return 0 if they match, -1 if s1<s2; 1 if s1>s2
*/
PRInt32 nsCRT::strcmp(const PRUnichar* s1, const char* s2) {
if(s1 && s2) {
for (;;) {
PRUnichar c1 = *s1++;
PRUnichar c2 = kIsoLatin1ToUCS2[*(const unsigned char*)s2++];
if (c1 != c2) {
if (c1 < c2) return -1;
return 1;
}
if ((0==c1) || (0==c2)) break;
}
}
else {
if (s1) // s2 must have been null
return -1;
if (s2) // s1 must have been null
return -1;
}
return 0;
}
/**
* Compare a unichar string ptr to cstring, up to N chars.
* NOTE: If both are null, we return 0.
* NOTE: We DO NOT terminate the search upon encountering NULL's before N
*
* @update gess 11/10/99
* @param s1 points to unichar string
* @param s2 points to cstring
* @return 0 if they match, -1 if s1<s2; 1 if s1>s2
*/
PRInt32 nsCRT::strncmp(const PRUnichar* s1, const char* s2, PRUint32 n) {
if(s1 && s2) {
if(0<n){
do {
PRUnichar c1 = *s1++;
PRUnichar c2 = kIsoLatin1ToUCS2[*(const unsigned char*)s2++];
if (c1 != c2) {
if (c1 < c2) return -1;
return 1;
}
} while (--n != 0);
}
}
return 0;
}
/**
* Compare a unichar string ptr to cstring without regard to case
* NOTE: If both are null, we return 0.
* NOTE: We terminate the search upon encountering NULL's
*
* @update gess 11/10/99
* @param s1 points to unichar string
* @param s2 points to cstring
* @return 0 if they match, -1 if s1<s2; 1 if s1>s2
*/
PRInt32 nsCRT::strcasecmp(const PRUnichar* s1, const char* s2) {
if(s1 && s2) {
for (;;) {
PRUnichar c1 = *s1++;
PRUnichar c2 = kIsoLatin1ToUCS2[*(const unsigned char*)s2++];
if (c1 != c2) {
c1 = TOLOWER(c1);
c2 = TOLOWER(c2);
if (c1 != c2) {
if (c1 < c2) return -1;
return 1;
}
}
if ((0==c1) || (0==c2)) break;
}
}
return 0;
}
/**
* Caseless compare up to N chars between unichar string ptr to cstring.
* NOTE: If both are null, we return 0.
* NOTE: We DO NOT terminate the search upon encountering NULL's before N
*
* @update gess 11/10/99
* @param s1 points to unichar string
* @param s2 points to cstring
* @return 0 if they match, -1 if s1<s2; 1 if s1>s2
*/
PRInt32 nsCRT::strncasecmp(const PRUnichar* s1, const char* s2, PRUint32 n) {
if(s1 && s2){
if(n != 0){
do {
PRUnichar c1 = *s1++;
PRUnichar c2 = kIsoLatin1ToUCS2[*(const unsigned char*)s2++];
if (c1 != c2) {
c1 = TOLOWER(c1);
c2 = TOLOWER(c2);
if (c1 != c2) {
if (c1 < c2) return -1;
return 1;
}
}
} while (--n != 0);
}
}
return 0;
}
PRUnichar* nsCRT::strdup(const PRUnichar* str)
{
PRUint32 len = nsCRT::strlen(str);
return strndup(str, len);
}
PRUnichar* nsCRT::strndup(const PRUnichar* str, PRUint32 len)
{
len += 1; // add one for the null
nsCppSharedAllocator<PRUnichar> shared_allocator;
PRUnichar* rslt = shared_allocator.allocate(len);
// PRUnichar* rslt = new PRUnichar[len];
if (rslt == NULL) return NULL;
nsCRT::memcpy(rslt, str, len * sizeof(PRUnichar));
return rslt;
}
PRUint32 nsCRT::HashCode(const char* str, PRUint32* resultingStrLen)
{
PRUint32 hc = 0, len = 0;
if (str) {
char ch;
while ((ch = *str++) != 0) {
// FYI: hc = hc*37 + ch
hc = ((hc << 5) + (hc << 2) + hc) + ch;
len++;
}
}
if (resultingStrLen)
*resultingStrLen = len;
return hc;
}
PRUint32 nsCRT::HashCode(const PRUnichar* str, PRUint32* resultingStrLen)
{
PRUint32 hc = 0, len = 0;
if (str) {
PRUnichar ch;
while ((ch = *str++) != 0) {
// FYI: hc = hc*37 + ch
hc = ((hc << 5) + (hc << 2) + hc) + ch;
len++;
}
}
if (resultingStrLen)
*resultingStrLen = len;
return hc;
}
PRUint32 nsCRT::BufferHashCode(const char* buf, PRUint32 len)
{
PRUint32 hc = 0;
for (PRUint32 i = 0; i < len; i++) {
char ch = *buf++;
// FYI: hc = hc*37 + ch
hc = ((hc << 5) + (hc << 2) + hc) + ch;
}
return hc;
}
PRInt32 nsCRT::atoi( const PRUnichar *string )
{
return atoi(string);
}
/**
* Determine if given char in valid alpha range
*
* @update ftang 04.27.2000
* @param aChar is character to be tested
* @return TRUE if in ASCII range
*/
PRBool nsCRT::IsAscii(PRUnichar aChar) {
return (0x0080 > aChar);
}
/**
* Determine if given char in valid alpha range
*
* @update ftang 04.27.2000
* @param aString is null terminated to be tested
* @return TRUE if all characters aare in ASCII range
*/
PRBool nsCRT::IsAscii(PRUnichar *aString) {
while(*aString) {
if( 0x0080 <= *aString)
return PR_FALSE;
aString++;
}
return PR_TRUE;
}
/**
* Determine if given char in valid alpha range
*
* @update rickg 03.10.2000
* @param aChar is character to be tested
* @return TRUE if in alpha range
*/
PRBool nsCRT::IsAsciiAlpha(PRUnichar aChar) {
// XXX i18n
if (((aChar >= 'A') && (aChar <= 'Z')) || ((aChar >= 'a') && (aChar <= 'z'))) {
return PR_TRUE;
}
return PR_FALSE;
}
/**
* Determine if given char is a valid space character
*
* @update rickg 03.10.2000
* @param aChar is character to be tested
* @return TRUE if is valid space char
*/
PRBool nsCRT::IsAsciiSpace(PRUnichar aChar) {
// XXX i18n
if ((aChar == ' ') || (aChar == '\r') || (aChar == '\n') || (aChar == '\t')) {
return PR_TRUE;
}
return PR_FALSE;
}
/**
* Determine if given char is valid digit
*
* @update rickg 03.10.2000
* @param aChar is character to be tested
* @return TRUE if char is a valid digit
*/
PRBool nsCRT::IsAsciiDigit(PRUnichar aChar) {
// XXX i18n
return PRBool((aChar >= '0') && (aChar <= '9'));
}
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