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Diffstat (limited to 'xpcom/ds/nsCRT.h')
| -rw-r--r-- | xpcom/ds/nsCRT.h | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/xpcom/ds/nsCRT.h b/xpcom/ds/nsCRT.h new file mode 100644 index 000000000..6fad83d6d --- /dev/null +++ b/xpcom/ds/nsCRT.h @@ -0,0 +1,186 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ +#ifndef nsCRT_h___ +#define nsCRT_h___ + +#include <stdlib.h> +#include <ctype.h> +#include "plstr.h" +#include "nscore.h" +#include "nsCRTGlue.h" + +#if defined(XP_WIN) +# 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 */ + +extern const char16_t 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 */ + }; + + /// String comparison. + static int32_t strcmp(const char* aStr1, const char* aStr2) + { + return int32_t(PL_strcmp(aStr1, aStr2)); + } + + static int32_t strncmp(const char* aStr1, const char* aStr2, + uint32_t aMaxLen) + { + return int32_t(PL_strncmp(aStr1, aStr2, aMaxLen)); + } + + /// Case-insensitive string comparison. + static int32_t strcasecmp(const char* aStr1, const char* aStr2) + { + return int32_t(PL_strcasecmp(aStr1, aStr2)); + } + + /// Case-insensitive string comparison with length + static int32_t strncasecmp(const char* aStr1, const char* aStr2, + uint32_t aMaxLen) + { + int32_t result = int32_t(PL_strncasecmp(aStr1, aStr2, 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 int32_t strncmp(const char* aStr1, const char* aStr2, int32_t aMaxLen) + { + // inline the first test (assumes strings are not null): + int32_t diff = + ((const unsigned char*)aStr1)[0] - ((const unsigned char*)aStr2)[0]; + if (diff != 0) { + return diff; + } + return int32_t(PL_strncmp(aStr1, aStr2, unsigned(aMaxLen))); + } + + /** + + 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 != nullptr) { + // 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* aStr, const char* aDelims, char** aNewStr); + + /// Like strcmp except for ucs2 strings + static int32_t strcmp(const char16_t* aStr1, const char16_t* aStr2); + /// Like strcmp except for ucs2 strings + static int32_t strncmp(const char16_t* aStr1, const char16_t* aStr2, + uint32_t 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* aHaystack, uint32_t aHaystackLen, + const char* aNeedle, uint32_t aNeedleLen); + + // String to longlong + static int64_t atoll(const char* aStr); + + 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(char16_t aChar) { return NS_IsAscii(aChar); } + static bool IsAscii(const char16_t* aString) { return NS_IsAscii(aString); } + static bool IsAsciiAlpha(char16_t aChar) { return NS_IsAsciiAlpha(aChar); } + static bool IsAsciiDigit(char16_t aChar) { return NS_IsAsciiDigit(aChar); } + static bool IsAsciiSpace(char16_t aChar) { return NS_IsAsciiWhitespace(aChar); } + static bool IsAscii(const char* aString) { return NS_IsAscii(aString); } + static bool IsAscii(const char* aString, uint32_t aLength) + { + return NS_IsAscii(aString, aLength); + } +}; + + +inline bool +NS_IS_SPACE(char16_t aChar) +{ + return ((int(aChar) & 0x7f) == int(aChar)) && isspace(int(aChar)); +} + +#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) +#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___ */ |