LCOV - app.info - objdir/xpcom/build/nsID.cpp

LCOV - code coverage report
| Current view: | directory - objdir/xpcom/build - nsID.cpp (source / functions) |  | Found | Hit | Coverage |
| Test: | app.info | Lines: | 30 | 29 | 96.7 %
| Date: | 2012-06-02 | Functions: | 3 | 3 | 100.0 %

           1                 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
           2                 : /* ***** BEGIN LICENSE BLOCK *****
           3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
           4                 :  *
           5                 :  * The contents of this file are subject to the Mozilla Public License Version
           6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
           7                 :  * the License. You may obtain a copy of the License at
           8                 :  * http://www.mozilla.org/MPL/
           9                 :  *
          10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
          11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
          12                 :  * for the specific language governing rights and limitations under the
          13                 :  * License.
          14                 :  *
          15                 :  * The Original Code is mozilla.org code.
          16                 :  *
          17                 :  * The Initial Developer of the Original Code is
          18                 :  * Netscape Communications Corporation.
          19                 :  * Portions created by the Initial Developer are Copyright (C) 1998
          20                 :  * the Initial Developer. All Rights Reserved.
          21                 :  *
          22                 :  * Contributor(s):
          23                 :  *   Daniel Bratell <bratell@lysator.liu.se>
          24                 :  *
          25                 :  * Alternatively, the contents of this file may be used under the terms of
          26                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
          27                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
          28                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
          29                 :  * of those above. If you wish to allow use of your version of this file only
          30                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
          31                 :  * use your version of this file under the terms of the MPL, indicate your
          32                 :  * decision by deleting the provisions above and replace them with the notice
          33                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
          34                 :  * the provisions above, a recipient may use your version of this file under
          35                 :  * the terms of any one of the MPL, the GPL or the LGPL.
          36                 :  *
          37                 :  * ***** END LICENSE BLOCK ***** */
          38                 : #include "nsID.h"
          39                 : #include "prprf.h"
          40                 : #include "nsMemory.h"
          41                 :
          42                 : static const char gIDFormat[] =
          43                 :   "{%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x}";
          44                 :
          45                 : static const char gIDFormat2[] =
          46                 :   "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x";
          47                 :
          48                 :
          49                 : /**
          50                 :  * Multiplies the_int_var with 16 (0x10) and adds the value of the
          51                 :  * hexadecimal digit the_char. If it fails it returns false from
          52                 :  * the function it's used in.
          53                 :  */
          54                 :
          55                 : #define ADD_HEX_CHAR_TO_INT_OR_RETURN_FALSE(the_char, the_int_var) \
          56                 :     the_int_var = (the_int_var << 4) + the_char; \
          57                 :     if(the_char >= '0' && the_char <= '9') the_int_var -= '0'; \
          58                 :     else if(the_char >= 'a' && the_char <= 'f') the_int_var -= 'a'-10; \
          59                 :     else if(the_char >= 'A' && the_char <= 'F') the_int_var -= 'A'-10; \
          60                 :     else return false
          61                 :
          62                 :
          63                 : /**
          64                 :  * Parses number_of_chars characters from the char_pointer pointer and
          65                 :  * puts the number in the dest_variable. The pointer is moved to point
          66                 :  * at the first character after the parsed ones. If it fails it returns
          67                 :  * false from the function the macro is used in.
          68                 :  */
          69                 :
          70                 : #define PARSE_CHARS_TO_NUM(char_pointer, dest_variable, number_of_chars) \
          71                 :   do { PRInt32 _i=number_of_chars; \
          72                 :   dest_variable = 0; \
          73                 :   while(_i) { \
          74                 :     ADD_HEX_CHAR_TO_INT_OR_RETURN_FALSE(*char_pointer, dest_variable); \
          75                 :     char_pointer++; \
          76                 :     _i--; \
          77                 :   } } while(0)
          78                 :
          79                 :
          80                 : /**
          81                 :  * Parses a hyphen from the char_pointer string. If there is no hyphen there
          82                 :  * the function returns false from the function it's used in. The
          83                 :  * char_pointer is advanced one step.
          84                 :  */
          85                 :
          86                 :  #define PARSE_HYPHEN(char_pointer)   if(*(char_pointer++) != '-') return false
          87                 :
          88                 : /*
          89                 :  * Turns a {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx} string into
          90                 :  * an nsID. It can also handle the old format without the { and }.
          91                 :  */
          92                 :
          93          277119 : bool nsID::Parse(const char *aIDStr)
          94                 : {
          95                 :   /* Optimized for speed */
          96          277119 :   if(!aIDStr) {
          97               0 :     return false;
          98                 :   }
          99                 :
         100          277119 :   bool expectFormat1 = (aIDStr[0] == '{');
         101          277119 :   if(expectFormat1) aIDStr++;
         102                 :
         103          277119 :   PARSE_CHARS_TO_NUM(aIDStr, m0, 8);
         104          277119 :   PARSE_HYPHEN(aIDStr);
         105          277119 :   PARSE_CHARS_TO_NUM(aIDStr, m1, 4);
         106          277119 :   PARSE_HYPHEN(aIDStr);
         107          277119 :   PARSE_CHARS_TO_NUM(aIDStr, m2, 4);
         108          277119 :   PARSE_HYPHEN(aIDStr);
         109                 :   int i;
         110          831357 :   for(i=0; i<2; i++)
         111          554238 :     PARSE_CHARS_TO_NUM(aIDStr, m3[i], 2);
         112          277119 :   PARSE_HYPHEN(aIDStr);
         113         2216952 :   while(i < 8) {
         114         1662714 :     PARSE_CHARS_TO_NUM(aIDStr, m3[i], 2);
         115         1662714 :     i++;
         116                 :   }
         117                 :
         118          277119 :   return expectFormat1 ? *aIDStr == '}' : true;
         119                 : }
         120                 :
         121                 : #ifndef XPCOM_GLUE_AVOID_NSPR
         122                 :
         123                 : /*
         124                 :  * Returns an allocated string in {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}
         125                 :  * format. The string is allocated with NS_Alloc and should be freed by
         126                 :  * the caller.
         127                 :  */
         128                 :
         129            6121 : char *nsID::ToString() const
         130                 : {
         131            6121 :   char *res = (char*)NS_Alloc(NSID_LENGTH);
         132                 :
         133            6121 :   if (res != NULL) {
         134                 :     PR_snprintf(res, NSID_LENGTH, gIDFormat,
         135                 :                 m0, (PRUint32) m1, (PRUint32) m2,
         136           18363 :                 (PRUint32) m3[0], (PRUint32) m3[1], (PRUint32) m3[2],
         137           18363 :                 (PRUint32) m3[3], (PRUint32) m3[4], (PRUint32) m3[5],
         138           42847 :                 (PRUint32) m3[6], (PRUint32) m3[7]);
         139                 :   }
         140            6121 :   return res;
         141                 : }
         142                 :
         143            5470 : void nsID::ToProvidedString(char (&dest)[NSID_LENGTH]) const
         144                 : {
         145                 :   PR_snprintf(dest, NSID_LENGTH, gIDFormat,
         146                 :               m0, (PRUint32) m1, (PRUint32) m2,
         147           16410 :               (PRUint32) m3[0], (PRUint32) m3[1], (PRUint32) m3[2],
         148           16410 :               (PRUint32) m3[3], (PRUint32) m3[4], (PRUint32) m3[5],
         149           38290 :               (PRUint32) m3[6], (PRUint32) m3[7]);
         150            5470 : }
         151                 :
         152                 : #endif // XPCOM_GLUE_AVOID_NSPR

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