gecko-dev/xpcom/ds/nsCRT.h

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8.4 KiB
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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):
*/
#ifndef nsCRT_h___
#define nsCRT_h___
#include <stdlib.h>
#include <string.h>
#include "plstr.h"
#include "nscore.h"
#include "prtypes.h"
#include "nsCppSharedAllocator.h"
#define CR '\015'
#define LF '\012'
#define VTAB '\013'
#define FF '\014'
#define TAB '\011'
#define CRSTR "\015"
#define LFSTR "\012"
#define CRLF "\015\012" /* A CR LF equivalent string */
#ifdef XP_MAC
# define NS_LINEBREAK "\015"
# define NS_LINEBREAK_LEN 1
#else
# ifdef XP_PC
# define NS_LINEBREAK "\015\012"
# define NS_LINEBREAK_LEN 2
# else
# if defined(XP_UNIX) || defined(XP_BEOS)
# define NS_LINEBREAK "\012"
# define NS_LINEBREAK_LEN 1
# endif /* XP_UNIX */
# endif /* XP_PC */
#endif /* XP_MAC */
extern const PRUnichar kIsoLatin1ToUCS2[256];
// This macro can be used in a class declaration for classes that want
// to ensure that their instance memory is zeroed.
#define NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW \
void* operator new(size_t sz) { \
void* rv = ::operator new(sz); \
if (rv) { \
nsCRT::zero(rv, sz); \
} \
return rv; \
} \
void operator delete(void* ptr) { \
::operator delete(ptr); \
}
// This macro works with the next macro to declare a non-inlined
// version of the above.
#define NS_DECL_ZEROING_OPERATOR_NEW \
void* operator new(size_t sz); \
void operator delete(void* ptr);
#define NS_IMPL_ZEROING_OPERATOR_NEW(_class) \
void* _class::operator new(size_t sz) { \
void* rv = ::operator new(sz); \
if (rv) { \
nsCRT::zero(rv, sz); \
} \
return rv; \
} \
void _class::operator delete(void* ptr) { \
::operator delete(ptr); \
}
// Freeing helper
#define CRTFREEIF(x) if (x) { nsCRT::free(x); x = 0; }
/// This is a wrapper class around all the C runtime functions.
class NS_COM nsCRT {
public:
/** Copy bytes from aSrc to aDest.
@param aDest the destination address
@param aSrc the source address
@param aCount the number of bytes to copy
*/
static void memcpy(void* aDest, const void* aSrc, PRUint32 aCount) {
NS_ASSERTION((aDest != NULL && aSrc != NULL) || (aCount == 0), "Invalid NULL argument");
::memcpy(aDest, aSrc, (size_t)aCount);
}
static void memmove(void* aDest, const void* aSrc, PRUint32 aCount) {
NS_ASSERTION((aDest != NULL && aSrc != NULL) || (aCount == 0), "Invalid NULL argument");
::memmove(aDest, aSrc, (size_t)aCount);
}
static void memset(void* aDest, PRUint8 aByte, PRUint32 aCount) {
NS_ASSERTION((aDest != NULL) || (aCount == 0), "Invalid NULL argument");
::memset(aDest, aByte, aCount);
}
static void zero(void* aDest, PRUint32 aCount) {
NS_ASSERTION((aDest != NULL) || (aCount == 0), "Invalid NULL argument");
::memset(aDest, 0, (size_t)aCount);
}
/** Compute the string length of s
@param s the string in question
@return the length of s
*/
static PRUint32 strlen(const char* s) {
return PRUint32(::strlen(s));
}
/// Compare s1 and s2.
static PRInt32 strcmp(const char* s1, const char* s2) {
return PRInt32(PL_strcmp(s1, s2));
}
static PRInt32 strncmp(const char* s1, const char* s2,
PRUint32 aMaxLen) {
return PRInt32(PL_strncmp(s1, s2, aMaxLen));
}
/// Case-insensitive string comparison.
static PRInt32 strcasecmp(const char* s1, const char* s2) {
return PRInt32(PL_strcasecmp(s1, s2));
}
/// Case-insensitive string comparison with length
static PRInt32 strncasecmp(const char* s1, const char* s2, PRUint32 aMaxLen) {
PRInt32 result=PRInt32(PL_strncasecmp(s1, s2, aMaxLen));
//Egags. PL_strncasecmp is returning *very* negative numbers.
//Some folks expect -1,0,1, so let's temper it's enthusiasm.
if(result<0)
result=-1;
return result;
}
static PRInt32 strncmp(const char* s1, const char* s2, PRInt32 aMaxLen) {
// inline the first test (assumes strings are not null):
PRInt32 diff = ((const unsigned char*)s1)[0] - ((const unsigned char*)s2)[0];
if (diff != 0) return diff;
return PRInt32(PL_strncmp(s1,s2,unsigned(aMaxLen)));
}
static char* strdup(const char* str) {
return PL_strdup(str);
}
static void free(char* str) {
PL_strfree(str);
}
/**
How to use this fancy (thread-safe) version of strtok:
void main( void ) {
printf( "%s\n\nTokens:\n", string );
// Establish string and get the first token:
char* newStr;
token = nsCRT::strtok( string, seps, &newStr );
while( token != NULL ) {
// While there are tokens in "string"
printf( " %s\n", token );
// Get next token:
token = nsCRT::strtok( newStr, seps, &newStr );
}
}
* WARNING - STRTOK WHACKS str THE FIRST TIME IT IS CALLED *
* MAKE A COPY OF str IF YOU NEED TO USE IT AFTER strtok() *
*/
static char* strtok(char* str, const char* delims, char* *newStr);
/// Like strlen except for ucs2 strings
static PRUint32 strlen(const PRUnichar* s);
/// Like strcmp except for ucs2 strings
static PRInt32 strcmp(const PRUnichar* s1, const PRUnichar* s2);
/// Like strcmp except for ucs2 strings
static PRInt32 strncmp(const PRUnichar* s1, const PRUnichar* s2,
PRUint32 aMaxLen);
/// Like strcasecmp except for ucs2 strings
static PRInt32 strcasecmp(const PRUnichar* s1, const PRUnichar* s2);
/// Like strncasecmp except for ucs2 strings
static PRInt32 strncasecmp(const PRUnichar* s1, const PRUnichar* s2,
PRUint32 aMaxLen);
/// Like strcmp with a char* and a ucs2 string
static PRInt32 strcmp(const PRUnichar* s1, const char* s2);
/// Like strncmp with a char* and a ucs2 string
static PRInt32 strncmp(const PRUnichar* s1, const char* s2,
PRUint32 aMaxLen);
/// Like strcasecmp with a char* and a ucs2 string
static PRInt32 strcasecmp(const PRUnichar* s1, const char* s2);
/// Like strncasecmp with a char* and a ucs2 string
static PRInt32 strncasecmp(const PRUnichar* s1, const char* s2,
PRUint32 aMaxLen);
// Note: uses new[] to allocate memory, so you must use delete[] to
// free the memory
static PRUnichar* strdup(const PRUnichar* str);
static void free(PRUnichar* str) {
nsCppSharedAllocator<PRUnichar> shared_allocator;
shared_allocator.deallocate(str, 0 /*we never new or kept the size*/);
}
/// Compute a hashcode for a C string
static PRUint32 HashValue(const char* s1);
/// Same as above except that we return the length in s1len
static PRUint32 HashValue(const char* s1, PRUint32* s1len);
/// Compute a hashcode for a ucs2 string
static PRUint32 HashValue(const PRUnichar* s1);
/// Same as above except that we return the length in s1len
static PRUint32 HashValue(const PRUnichar* s1, PRUint32* s1len);
/// String to integer.
static PRInt32 atoi( const PRUnichar *string );
static PRUnichar ToUpper(PRUnichar aChar);
static PRUnichar ToLower(PRUnichar aChar);
static PRBool IsUpper(PRUnichar aChar);
static PRBool IsLower(PRUnichar aChar);
static PRBool IsAscii(PRUnichar aChar);
static PRBool IsAscii(PRUnichar* aString);
static PRBool IsAsciiAlpha(PRUnichar aChar);
static PRBool IsAsciiDigit(PRUnichar aChar);
static PRBool IsAsciiSpace(PRUnichar aChar);
};
#endif /* nsCRT_h___ */