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git-svn-id: svn://svn.cc65.org/cc65/trunk@3 b7a2c559-68d2-44c3-8de9-860c34a00d81

src/ar65/fileio.c

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+/*****************************************************************************/
+/*                                                                           */
+/*				   fileio.c				     */
+/*                                                                           */
+/*			File I/O for the ar65 archiver			     */
+/*                                                                           */
+/*                                                                           */
+/*                                                                           */
+/* (C) 1998     Ullrich von Bassewitz                                        */
+/*              Wacholderweg 14                                              */
+/*              D-70597 Stuttgart                                            */
+/* EMail:       uz@musoftware.de                                             */
+/*                                                                           */
+/*                                                                           */
+/* 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 "error.h"
+#include "mem.h"
+#include "fileio.h"
+
+
+
+/*****************************************************************************/
+/*     	      	    		     Code				     */
+/*****************************************************************************/
+
+
+
+void Write8 (FILE* F, unsigned char Val)
+/* Write an 8 bit value to the file */
+{
+    if (putc (Val, F) == EOF) {
+    	Error ("Write error (disk full?)");
+    }
+}
+
+
+
+void Write16 (FILE* F, unsigned Val)
+/* Write a 16 bit value to the file */
+{
+    Write8 (F, (unsigned char) Val);
+    Write8 (F, (unsigned char) (Val >> 8));
+}
+
+
+
+void Write32 (FILE* F, unsigned long Val)
+/* Write a 32 bit value to the file */
+{
+    Write8 (F, (unsigned char) Val);
+    Write8 (F, (unsigned char) (Val >> 8));
+    Write8 (F, (unsigned char) (Val >> 16));
+    Write8 (F, (unsigned char) (Val >> 24));
+}
+
+
+
+void WriteStr (FILE* F, const char* S)
+/* Write a string to the file */
+{
+    unsigned Len = strlen (S);
+    if (Len > 255) {
+       	Internal ("String too long");
+    }
+    Write8 (F, (unsigned char) Len);
+    WriteData (F, S, Len);
+}
+
+
+
+void WriteData (FILE* F, const void* Data, unsigned Size)
+/* Write data to the file */
+{
+    if (fwrite (Data, 1, Size, F) != Size) {
+ 	Error ("Write error (disk full?)");
+    }
+}
+
+
+
+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 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;
+}
+
+
+
+char* ReadStr (FILE* F)
+/* Read a string from the file (the memory will be malloc'ed) */
+{
+    /* Read the length byte */
+    unsigned Len = Read8 (F);
+
+    /* Allocate memory and read the string itself */
+    char* S = Xmalloc (Len + 1);
+    ReadData (F, S, Len);
+
+    /* Terminate the string and return it */
+    S [Len] = '\0';
+    return S;
+}
+
+
+
+void* ReadData (FILE* F, void* Data, unsigned Size)
+/* Read data from the file */
+{
+    if (fread (Data, 1, Size, F) != Size) {
+	Error ("Read error (file corrupt?)");
+    }
+    return Data;
+}
+
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