mirror of
https://github.com/rn10950/RetroZilla.git
synced 2024-09-18 11:10:15 +02:00
332 lines
8.3 KiB
C++
332 lines
8.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Communicator client code, released
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* March 31, 1998.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Samir Gehani <sgehani@netscape.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsINIParser.h"
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nsINIParser::nsINIParser(char *aFilename)
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{
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FILE *fd = NULL;
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long eofpos = 0;
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int rd = 0;
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mFileBuf = NULL;
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mFileBufSize = 0;
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mError = OK;
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DUMP("nsINIParser");
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/* param check */
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if (!aFilename)
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{
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mError = E_PARAM;
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return;
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}
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/* open the file */
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fd = fopen(aFilename, "r");
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if (!fd)
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goto bail;
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/* get file size */
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if (fseek(fd, 0, SEEK_END) != 0)
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goto bail;
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eofpos = ftell(fd);
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if (eofpos == 0)
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goto bail;
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/* malloc an internal buf the size of the file */
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mFileBuf = (char *) malloc((eofpos+1) * sizeof(char));
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if (!mFileBuf)
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{
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mError = E_MEM;
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return;
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}
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mFileBufSize = eofpos;
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/* read the file in one swoop */
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if (fseek(fd, 0, SEEK_SET) != 0)
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goto bail;
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rd = fread((void *)mFileBuf, 1, eofpos, fd);
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if (!rd)
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goto bail;
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mFileBuf[mFileBufSize] = '\0';
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/* close file */
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fclose(fd);
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return;
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bail:
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mError = E_READ;
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return;
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}
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nsINIParser::~nsINIParser()
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{
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DUMP("~nsINIParser");
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}
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int
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nsINIParser::GetString( char *aSection, char *aKey,
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char *aValBuf, int *aIOValBufSize )
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{
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char *secPtr = NULL;
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mError = OK;
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DUMP("GetString");
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/* param check */
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if ( !aSection || !aKey || !aValBuf ||
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!aIOValBufSize || (*aIOValBufSize <= 0) )
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return E_PARAM;
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/* find the section if it exists */
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mError = FindSection(aSection, &secPtr);
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if (mError != OK)
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return mError;
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/* find the key if it exists in the valid section we found */
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mError = FindKey(secPtr, aKey, aValBuf, aIOValBufSize);
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return mError;
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}
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int
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nsINIParser::GetStringAlloc( char *aSection, char *aKey,
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char **aOutBuf, int *aOutBufSize )
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{
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char buf[MAX_VAL_SIZE];
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int bufsize = MAX_VAL_SIZE;
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mError = OK;
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DUMP("GetStringAlloc");
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mError = GetString(aSection, aKey, buf, &bufsize);
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if (mError != OK)
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return mError;
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*aOutBuf = (char *) malloc(bufsize + 1);
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strncpy(*aOutBuf, buf, bufsize);
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*(*aOutBuf + bufsize) = 0;
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*aOutBufSize = bufsize + 1;
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return mError;
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}
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int
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nsINIParser::GetError()
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{
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DUMP("GetError");
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return mError;
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}
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char *
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nsINIParser::ResolveName(char *aINIRoot)
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{
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char *resolved = NULL;
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char *locale = NULL;
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struct stat st_exists;
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/* param check */
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if (!aINIRoot)
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return NULL;
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locale = setlocale(LC_CTYPE, NULL);
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if (!locale)
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return NULL;
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/* resolved string: "<root>.ini.<locale>\0" */
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resolved = (char *) malloc(strlen(aINIRoot) + 5 + strlen(locale) + 1);
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if (!resolved)
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return NULL;
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/* locale specific ini file name */
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sprintf(resolved, "%s.ini.%s", aINIRoot, locale);
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if (0 == stat(resolved, &st_exists))
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return resolved;
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/* fallback to general ini file name */
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sprintf(resolved, "%s.ini", aINIRoot);
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if (0 == stat(resolved, &st_exists))
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return resolved;
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/* neither existed so error returned */
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return NULL;
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}
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int
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nsINIParser::FindSection(char *aSection, char **aOutSecPtr)
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{
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char *currChar = mFileBuf;
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char *nextSec = NULL;
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char *secClose = NULL;
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char *nextNL = NULL;
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int aSectionLen = strlen(aSection);
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mError = E_NO_SEC;
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DUMP("FindSection");
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// param check
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if (!aSection || !aOutSecPtr)
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{
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mError = E_PARAM;
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return mError;
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}
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while (currChar < (mFileBuf + mFileBufSize))
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{
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// look for first '['
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nextSec = NULL;
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nextSec = strchr(currChar, '[');
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if (!nextSec)
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break;
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currChar = nextSec + 1;
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// extract section name till first ']'
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secClose = NULL; nextNL = NULL;
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secClose = strchr(currChar, ']');
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nextNL = strchr(currChar, NL);
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if ((!nextNL) || (nextNL < secClose))
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{
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currChar = nextNL;
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continue;
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}
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// if section name matches we succeeded
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if (strncmp(aSection, currChar, aSectionLen) == 0
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&& secClose-currChar == aSectionLen)
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{
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*aOutSecPtr = secClose + 1;
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mError = OK;
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break;
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}
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}
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return mError;
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}
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int
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nsINIParser::FindKey(char *aSecPtr, char *aKey, char *aVal, int *aIOValSize)
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{
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char *nextNL = NULL;
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char *secEnd = NULL;
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char *currLine = aSecPtr;
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char *nextEq = NULL;
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int aKeyLen = strlen(aKey);
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mError = E_NO_KEY;
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DUMP("FindKey");
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// param check
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if (!aSecPtr || !aKey || !aVal || !aIOValSize || (*aIOValSize <= 0))
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{
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mError = E_PARAM;
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return mError;
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}
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// determine the section end
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secEnd = aSecPtr;
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find_end:
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if (secEnd)
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secEnd = strchr(secEnd, '['); // search for next sec start
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if (!secEnd)
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{
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secEnd = strchr(aSecPtr, '\0'); // else search for file end
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if (!secEnd)
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{
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mError = E_SEC_CORRUPT; // else this data is corrupt
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return mError;
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}
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}
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// handle start section token ('[') in values for i18n
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if (*secEnd == '[' && !(secEnd == aSecPtr || *(secEnd-1) == NL))
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{
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secEnd++;
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goto find_end;
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}
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while (currLine < secEnd)
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{
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nextNL = NULL;
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nextNL = strchr(currLine, NL);
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if (!nextNL)
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nextNL = mFileBuf + mFileBufSize;
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// ignore commented lines (starting with ;)
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if (currLine == strchr(currLine, ';'))
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{
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currLine = nextNL + 1;
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continue;
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}
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// extract key before '='
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nextEq = NULL;
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nextEq = strchr(currLine, '=');
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if (!nextEq || nextEq > nextNL)
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{
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currLine = nextNL + 1;
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continue;
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}
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// if key matches we succeeded
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if (strncmp(currLine, aKey, aKeyLen) == 0
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&& nextEq-currLine == aKeyLen)
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{
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// extract the value and return
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if (*aIOValSize < nextNL - nextEq)
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{
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mError = E_SMALL_BUF;
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*aVal = '\0';
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*aIOValSize = 0;
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return mError;
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}
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*aIOValSize = nextNL - (nextEq + 1);
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strncpy(aVal, (nextEq + 1), *aIOValSize);
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*(aVal + *aIOValSize) = 0; // null terminate
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mError = OK;
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return mError;
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}
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else
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{
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currLine = nextNL + 1;
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}
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}
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return mError;
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}
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