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Diffstat (limited to 'src/libs/xpcom18a4/xpcom/base/nsID.cpp')
| -rw-r--r-- | src/libs/xpcom18a4/xpcom/base/nsID.cpp | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/src/libs/xpcom18a4/xpcom/base/nsID.cpp b/src/libs/xpcom18a4/xpcom/base/nsID.cpp new file mode 100644 index 00000000..adb0d41c --- /dev/null +++ b/src/libs/xpcom18a4/xpcom/base/nsID.cpp @@ -0,0 +1,152 @@ +/* -*- Mode: C++; tab-width: 4; 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): + * Daniel Bratell <bratell@lysator.liu.se> + * + * 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 ***** */ +#include "nsID.h" +#include "prprf.h" +#include "prmem.h" + +static const char gIDFormat[] = + "{%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x}"; + +static const char gIDFormat2[] = + "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x"; + + +/** + * Multiplies the_int_var with 16 (0x10) and adds the value of the + * hexadecimal digit the_char. If it fails it returns PR_FALSE from + * the function it's used in. + */ + +#define ADD_HEX_CHAR_TO_INT_OR_RETURN_FALSE(the_char, the_int_var) \ + the_int_var = (the_int_var << 4) + the_char; \ + if(the_char >= '0' && the_char <= '9') the_int_var -= '0'; \ + else if(the_char >= 'a' && the_char <= 'f') the_int_var -= 'a'-10; \ + else if(the_char >= 'A' && the_char <= 'F') the_int_var -= 'A'-10; \ + else return PR_FALSE + + +/** + * Parses number_of_chars characters from the char_pointer pointer and + * puts the number in the dest_variable. The pointer is moved to point + * at the first character after the parsed ones. If it fails it returns + * PR_FALSE from the function the macro is used in. + */ + +#define PARSE_CHARS_TO_NUM(char_pointer, dest_variable, number_of_chars) \ + do { PRInt32 _i=number_of_chars; \ + dest_variable = 0; \ + while(_i) { \ + ADD_HEX_CHAR_TO_INT_OR_RETURN_FALSE(*char_pointer, dest_variable); \ + char_pointer++; \ + _i--; \ + } } while(0) + + +/** + * Parses a hyphen from the char_pointer string. If there is no hyphen there + * the function returns PR_FALSE from the function it's used in. The + * char_pointer is advanced one step. + */ + + #define PARSE_HYPHEN(char_pointer) if(*(char_pointer++) != '-') return PR_FALSE + +/* + * Turns a {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx} string into + * an nsID. It can also handle the old format without the { and }. + */ + +NS_COM PRBool nsID::Parse(const char *aIDStr) +{ + /* Optimized for speed */ + if(!aIDStr) { + return PR_FALSE; + } + + PRBool expectFormat1 = (aIDStr[0] == '{'); + if(expectFormat1) aIDStr++; + + PARSE_CHARS_TO_NUM(aIDStr, m0, 8); + PARSE_HYPHEN(aIDStr); + PARSE_CHARS_TO_NUM(aIDStr, m1, 4); + PARSE_HYPHEN(aIDStr); + PARSE_CHARS_TO_NUM(aIDStr, m2, 4); + PARSE_HYPHEN(aIDStr); + int i; + for(i=0; i<2; i++) + PARSE_CHARS_TO_NUM(aIDStr, m3[i], 2); + PARSE_HYPHEN(aIDStr); + while(i < 8) { + PARSE_CHARS_TO_NUM(aIDStr, m3[i], 2); + i++; + } + + return expectFormat1 ? *aIDStr == '}' : PR_TRUE; +} + +/* + * Returns an allocated string in {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx} + * format. The string is allocated with PR_Malloc and should be freed by + * the caller. + */ + +NS_COM char *nsID::ToString() const +{ + char *res = (char*)PR_Malloc(39); // use PR_Malloc if this is to be freed with nsCRT::free + + if (res != NULL) { + PR_snprintf(res, 39, gIDFormat, + m0, (PRUint32) m1, (PRUint32) m2, + (PRUint32) m3[0], (PRUint32) m3[1], (PRUint32) m3[2], + (PRUint32) m3[3], (PRUint32) m3[4], (PRUint32) m3[5], + (PRUint32) m3[6], (PRUint32) m3[7]); + } + return res; +} + +#ifdef VBOX +void nsID::ToProvidedString(char (&dest)[NSID_LENGTH]) const +{ + PR_snprintf(dest, NSID_LENGTH, gIDFormat, + m0, (PRUint32) m1, (PRUint32) m2, + (PRUint32) m3[0], (PRUint32) m3[1], (PRUint32) m3[2], + (PRUint32) m3[3], (PRUint32) m3[4], (PRUint32) m3[5], + (PRUint32) m3[6], (PRUint32) m3[7]); +} +#endif + + |