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115 lines
3.4 KiB
C
115 lines
3.4 KiB
C
/*
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* PSP Software Development Kit - http://www.pspdev.org
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* -----------------------------------------------------------------------
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* Licensed under the BSD license, see LICENSE in PSPSDK root for details.
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*
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* psf.c - PSF parsing routines
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*
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* Copyright (c) 2005 Jim Paris <jim@jtan.com>
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* Coypright (c) 2005 psp123
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*
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* $Id: psf.c 1560 2005-12-10 01:16:32Z jim $
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*/
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#include "psf.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <malloc.h>
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#include <pspchnnlsv.h>
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/* Find to the named section in the PSF file, and return an
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absolute pointer to it and the section size. */
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int find_psf_section(const char *name,
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unsigned char *data,
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int dataLen,
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unsigned char **location,
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int *size)
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{
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unsigned short int nameLoc;
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int i, magicHead, strLoc, headLen, numSects;
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int sectCurLen, sectBufLen, sectBufLoc, curPos;
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if (dataLen < 0x14)
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return -1;
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/* Get the basics from the header */
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magicHead = *(unsigned int *)&data[0x00];
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strLoc = *(unsigned int *)&data[0x08];
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headLen = *(unsigned int *)&data[0x0C];
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numSects = *(unsigned int *)&data[0x10];
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/* Do some error checking */
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if (magicHead != 0x46535000)
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return -2;
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/* Verify strLoc is proper */
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if ((strLoc > headLen) || (strLoc >= dataLen))
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return -3;
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/* Verify headLen is proper */
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if (headLen >= dataLen)
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return -4;
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/* Verify numSects is proper */
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if (numSects != ((strLoc - 0x14) / 0x10))
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return -5;
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/* Process all sections */
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for (i = 0; i < numSects; i++)
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{
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/* Get the curPos */
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curPos = 0x14 + (i * 0x10);
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/* Verify curPos is proper */
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if (curPos >= strLoc)
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return -6;
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/* Get some basic info about this section */
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nameLoc = *(unsigned short *)&data[curPos];
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sectCurLen = *(unsigned short *)&data[curPos + 0x04];
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sectBufLen = *(unsigned short *)&data[curPos + 0x08];
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sectBufLoc = *(unsigned short *)&data[curPos + 0x0C];
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/* Do some error checking */
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if ((nameLoc < dataLen) && (sectCurLen < dataLen)
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&& (sectBufLen < dataLen) && (sectBufLoc < dataLen))
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{
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/* Check if this is the section we want */
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if (!stricmp((char *)&data[strLoc + nameLoc], name))
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{
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/* Update the location and size */
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*location = &data[headLen + sectBufLoc];
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*size = sectBufLen;
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return 0;
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}
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}
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}
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/* Section was not found if it makes it here */
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return -7;
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}
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/* Find the named file inside the FILE_LIST, and return
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an absolute pointer to it. */
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int find_psf_datafile(const char *name,
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unsigned char *filelist,
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int size,
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unsigned char **location)
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{
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int i;
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/* Process all files */
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for (i = 0; (i + 0x0d) <= size; i += 0x20)
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{
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/* Check if this is the filename we want */
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if (!strncasecmp((char *)&filelist[i], name, 0x0d)) {
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*location = &filelist[i];
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return 0;
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}
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}
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/* File was not found if it makes it here */
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return -1;
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}
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