pjs/xpcom/ds/nsCRT.h

286 строки
10 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla 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/MPL/
*
* 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 the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef nsCRT_h___
#define nsCRT_h___
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "plstr.h"
#include "nscore.h"
#include "prtypes.h"
#include "nsCppSharedAllocator.h"
#include "nsCRTGlue.h"
#if defined(XP_WIN) || defined(XP_OS2)
# define NS_LINEBREAK "\015\012"
# define NS_LINEBREAK_LEN 2
#else
# ifdef XP_UNIX
# define NS_LINEBREAK "\012"
# define NS_LINEBREAK_LEN 1
# endif /* XP_UNIX */
#endif /* XP_WIN || XP_OS2 */
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) CPP_THROW_NEW { \
void* rv = ::operator new(sz); \
if (rv) { \
memset(rv, 0, 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) CPP_THROW_NEW; \
void operator delete(void* ptr);
#define NS_IMPL_ZEROING_OPERATOR_NEW(_class) \
void* _class::operator new(size_t sz) CPP_THROW_NEW { \
void* rv = ::operator new(sz); \
if (rv) { \
memset(rv, 0, 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 nsCRT {
public:
enum {
LF='\n' /* Line Feed */,
VTAB='\v' /* Vertical Tab */,
CR='\r' /* Carriage Return */
};
/***
*** The following nsCRT::mem* functions are no longer
*** supported, please use the corresponding lib C
*** functions instead.
***
*** nsCRT::memcpy()
*** nsCRT::memcmp()
*** nsCRT::memmove()
*** nsCRT::memset()
*** nsCRT::zero()
***
*** Additionally, the following char* string utilities
*** are no longer supported, please use the
*** corresponding lib C functions instead.
***
*** nsCRT::strlen()
***
***/
/** 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));
//Egads. PL_strncasecmp is returning *very* negative numbers.
//Some folks expect -1,0,1, so let's temper its 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 char* strndup(const char* str, PRUint32 len) {
return PL_strndup(str, len);
}
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);
static PRUint32 strlen(const PRUnichar* s) {
// XXXbsmedberg: remove this null-check at some point
if (!s) {
NS_ERROR("Passing null to nsCRT::strlen");
return 0;
}
return NS_strlen(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);
// The GNU libc has memmem, which is strstr except for binary data
// This is our own implementation that uses memmem on platforms
// where it's available.
static const char* memmem(const char* haystack, PRUint32 haystackLen,
const char* needle, PRUint32 needleLen);
// You must use nsCRT::free(PRUnichar*) to free memory allocated
// by nsCRT::strdup(PRUnichar*).
static PRUnichar* strdup(const PRUnichar* str);
// You must use nsCRT::free(PRUnichar*) to free memory allocated
// by strndup(PRUnichar*, PRUint32).
static PRUnichar* strndup(const PRUnichar* str, PRUint32 len);
static void free(PRUnichar* str) {
nsCppSharedAllocator<PRUnichar> shared_allocator;
shared_allocator.deallocate(str, 0 /*we never new or kept the size*/);
}
// Computes the hashcode for a c-string, returns the string length as
// an added bonus.
static PRUint32 HashCode(const char* str,
PRUint32* resultingStrLen = nsnull);
// Computes the hashcode for a length number of bytes of c-string data.
static PRUint32 HashCode(const char* start, PRUint32 length);
// Computes the hashcode for a ucs2 string, returns the string length
// as an added bonus.
static PRUint32 HashCode(const PRUnichar* str,
PRUint32* resultingStrLen = nsnull);
// Computes the hashcode for a buffer with a specified length.
static PRUint32 HashCode(const PRUnichar* str, PRUint32 strLen);
// Computes a hashcode for a length number of UTF8
// characters. Returns the same hash code as the HashCode method
// taking a |PRUnichar*| would if the string were converted to UTF16.
static PRUint32 HashCodeAsUTF16(const char* start, PRUint32 length,
bool* err);
// String to longlong
static PRInt64 atoll(const char *str);
static char ToUpper(char aChar) { return NS_ToUpper(aChar); }
static char ToLower(char aChar) { return NS_ToLower(aChar); }
static bool IsUpper(char aChar) { return NS_IsUpper(aChar); }
static bool IsLower(char aChar) { return NS_IsLower(aChar); }
static bool IsAscii(PRUnichar aChar) { return NS_IsAscii(aChar); }
static bool IsAscii(const PRUnichar* aString) { return NS_IsAscii(aString); }
static bool IsAsciiAlpha(PRUnichar aChar) { return NS_IsAsciiAlpha(aChar); }
static bool IsAsciiDigit(PRUnichar aChar) { return NS_IsAsciiDigit(aChar); }
static bool IsAsciiSpace(PRUnichar aChar) { return NS_IsAsciiWhitespace(aChar); }
static bool IsAscii(const char* aString) { return NS_IsAscii(aString); }
static bool IsAscii(const char* aString, PRUint32 aLength) { return NS_IsAscii(aString, aLength); }
};
#define NS_IS_SPACE(VAL) \
(((((intn)(VAL)) & 0x7f) == ((intn)(VAL))) && isspace((intn)(VAL)) )
#define NS_IS_CNTRL(i) ((((unsigned int) (i)) > 0x7f) ? (int) 0 : iscntrl(i))
#define NS_IS_DIGIT(i) ((((unsigned int) (i)) > 0x7f) ? (int) 0 : isdigit(i))
#if defined(XP_WIN) || defined(XP_OS2)
#define NS_IS_ALPHA(VAL) (isascii((int)(VAL)) && isalpha((int)(VAL)))
#else
#define NS_IS_ALPHA(VAL) ((((unsigned int) (VAL)) > 0x7f) ? (int) 0 : isalpha((int)(VAL)))
#endif
#endif /* nsCRT_h___ */