--- /dev/null
+/*****************************************************************************/
+/* */
+/* 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;
+}
+
+
+
--- /dev/null
+/*****************************************************************************/
+/* */
+/* 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
+
+
+
projects / cc65 / commitdiff