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Adapted the file i/o module from od65.

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git-svn-id: svn://svn.cc65.org/cc65/trunk@5551 b7a2c559-68d2-44c3-8de9-860c34a00d81
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uz 2012-02-25 20:51:16 +00:00
parent 364eb07a59
commit eb4001a52f
3 changed files with 209 additions and 0 deletions
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128
src/sp65/fileio.c Normal file
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@ -0,0 +1,128 @@
/*****************************************************************************/
/* */
/* fileio.c */
/* */
/* File I/O for the sp65 sprite and bitmap utility */
/* */
/* */
/* */
/* (C) 1998-2012, Ullrich von Bassewitz */
/* Roemerstrasse 52 */
/* D-70794 Filderstadt */
/* EMail: uz@cc65.org */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
/* warranty. In no event will the authors be held liable for any damages */
/* arising from the use of this software. */
/* */
/* Permission is granted to anyone to use this software for any purpose, */
/* including commercial applications, and to alter it and redistribute it */
/* freely, subject to the following restrictions: */
/* */
/* 1. The origin of this software must not be misrepresented; you must not */
/* claim that you wrote the original software. If you use this software */
/* in a product, an acknowledgment in the product documentation would be */
/* appreciated but is not required. */
/* 2. Altered source versions must be plainly marked as such, and must not */
/* be misrepresented as being the original software. */
/* 3. This notice may not be removed or altered from any source */
/* distribution. */
/* */
/*****************************************************************************/
#include <string.h>
#include <errno.h>
/* od65 */
#include "error.h"
#include "fileio.h"
/*****************************************************************************/
/* Code */
/*****************************************************************************/
void FileSetPos (FILE* F, unsigned long Pos)
/* Seek to the given absolute position, fail on errors */
{
if (fseek (F, Pos, SEEK_SET) != 0) {
Error ("Cannot seek: %s", strerror (errno));
}
}
unsigned long FileGetPos (FILE* F)
/* Return the current file position, fail on errors */
{
long Pos = ftell (F);
if (Pos < 0) {
Error ("Error in ftell: %s", strerror (errno));
}
return Pos;
}
unsigned Read8 (FILE* F)
/* Read an 8 bit value from the file */
{
int C = getc (F);
if (C == EOF) {
Error ("Read error (file corrupt?)");
}
return C;
}
unsigned Read16 (FILE* F)
/* Read a 16 bit value from the file */
{
unsigned Lo = Read8 (F);
unsigned Hi = Read8 (F);
return (Hi << 8) | Lo;
}
unsigned long Read24 (FILE* F)
/* Read a 24 bit value from the file */
{
unsigned long Lo = Read16 (F);
unsigned long Hi = Read8 (F);
return (Hi << 16) | Lo;
}
unsigned long Read32 (FILE* F)
/* Read a 32 bit value from the file */
{
unsigned long Lo = Read16 (F);
unsigned long Hi = Read16 (F);
return (Hi << 16) | Lo;
}
void* ReadData (FILE* F, void* Data, unsigned Size)
/* Read data from the file */
{
/* Accept zero sized reads */
if (Size > 0) {
if (fread (Data, 1, Size, F) != Size) {
Error ("Read error (file corrupt?)");
}
}
return Data;
}

80
src/sp65/fileio.h Normal file
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/*****************************************************************************/
/* */
/* fileio.h */
/* */
/* File I/O for the sp65 sprite and bitmap utility */
/* */
/* */
/* */
/* (C) 1998-2012, Ullrich von Bassewitz */
/* Roemerstrasse 52 */
/* D-70794 Filderstadt */
/* EMail: uz@cc65.org */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
/* warranty. In no event will the authors be held liable for any damages */
/* arising from the use of this software. */
/* */
/* Permission is granted to anyone to use this software for any purpose, */
/* including commercial applications, and to alter it and redistribute it */
/* freely, subject to the following restrictions: */
/* */
/* 1. The origin of this software must not be misrepresented; you must not */
/* claim that you wrote the original software. If you use this software */
/* in a product, an acknowledgment in the product documentation would be */
/* appreciated but is not required. */
/* 2. Altered source versions must be plainly marked as such, and must not */
/* be misrepresented as being the original software. */
/* 3. This notice may not be removed or altered from any source */
/* distribution. */
/* */
/*****************************************************************************/
#ifndef FILEIO_H
#define FILEIO_H
#include <stdio.h>
/*****************************************************************************/
/* Code */
/*****************************************************************************/
void FileSetPos (FILE* F, unsigned long Pos);
/* Seek to the given absolute position, fail on errors */
unsigned long FileGetPos (FILE* F);
/* Return the current file position, fail on errors */
unsigned Read8 (FILE* F);
/* Read an 8 bit value from the file */
unsigned Read16 (FILE* F);
/* Read a 16 bit value from the file */
unsigned long Read24 (FILE* F);
/* Read a 24 bit value from the file */
unsigned long Read32 (FILE* F);
/* Read a 32 bit value from the file */
char* ReadStr (FILE* F);
/* Read a string from the file into a malloced area */
void* ReadData (FILE* F, void* Data, unsigned Size);
/* Read data from the file */
/* End of fileio.h */
#endif

1
src/sp65/make/gcc.mak
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@ -24,6 +24,7 @@ LDFLAGS =
OBJS = bitmap.o \ OBJS = bitmap.o \
error.o \ error.o \
fileio.o \
main.o \ main.o \
palette.o palette.o