X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=dosdemo;a=blobdiff_plain;f=libs%2Fmikmod%2Fmmio%2Fmmio.c;fp=libs%2Fmikmod%2Fmmio%2Fmmio.c;h=2ab6affda1887705e78405cb5ba6ca5f4333efa7;hp=0000000000000000000000000000000000000000;hb=cf94899f4f4d8535074db6421245b973d2fcde8c;hpb=8024ae981f39d370af5cceb3cb97f62820b0a120

diff --git a/libs/mikmod/mmio/mmio.c b/libs/mikmod/mmio/mmio.c
new file mode 100644
index 0000000..2ab6aff
--- /dev/null
+++ b/libs/mikmod/mmio/mmio.c
@@ -0,0 +1,537 @@
+/*	MikMod sound library
+	(c) 1998, 1999, 2000 Miodrag Vallat and others - see file AUTHORS for
+	complete list.
+
+	This library is free software; you can redistribute it and/or modify
+	it under the terms of the GNU Library General Public License as
+	published by the Free Software Foundation; either version 2 of
+	the License, or (at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU Library General Public License for more details.
+
+	You should have received a copy of the GNU Library General Public
+	License along with this library; if not, write to the Free Software
+	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+	02111-1307, USA.
+*/
+
+/*==============================================================================
+
+  $Id$
+
+  Portable file I/O routines
+
+==============================================================================*/
+
+/*
+
+	The way this module works:
+
+	- _mm_fopen will call the errorhandler [see mmerror.c] in addition to
+	  setting _mm_errno on exit.
+	- _mm_iobase is for internal use.  It is used by Player_LoadFP to
+	  ensure that it works properly with wad files.
+	- _mm_read_I_* and _mm_read_M_* differ : the first is for reading data
+	  written by a little endian (intel) machine, and the second is for reading
+	  big endian (Mac, RISC, Alpha) machine data.
+	- _mm_write functions work the same as the _mm_read functions.
+	- _mm_read_string is for reading binary strings.  It is basically the same
+	  as an fread of bytes.
+
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#ifdef HAVE_LIMITS_H
+#include <limits.h>
+#endif
+
+#include <stdio.h>
+#include <string.h>
+
+#include "mikmod_internals.h"
+
+#ifdef SUNOS
+extern int fclose(FILE *);
+extern int fgetc(FILE *);
+extern int fputc(int, FILE *);
+extern size_t fread(void *, size_t, size_t, FILE *);
+extern int fseek(FILE *, long, int);
+extern size_t fwrite(const void *, size_t, size_t, FILE *);
+#endif
+
+#define COPY_BUFSIZE  1024
+
+/* some prototypes */
+static BOOL _mm_MemReader_Eof(MREADER* reader);
+static BOOL _mm_MemReader_Read(MREADER* reader,void* ptr,size_t size);
+static int _mm_MemReader_Get(MREADER* reader);
+static int _mm_MemReader_Seek(MREADER* reader,long offset,int whence);
+static long _mm_MemReader_Tell(MREADER* reader);
+
+/*static long _mm_iobase = 0, temp_iobase = 0;*/
+
+FILE* _mm_fopen(const CHAR* fname, const CHAR* attrib)
+{
+	FILE *fp;
+
+	if(!(fp=fopen(fname,attrib))) {
+		_mm_errno = MMERR_OPENING_FILE;
+		if(_mm_errorhandler) _mm_errorhandler();
+	}
+	return fp;
+}
+
+BOOL _mm_FileExists(const CHAR* fname)
+{
+	FILE *fp;
+
+	if(!(fp=fopen(fname,"r"))) return 0;
+	fclose(fp);
+
+	return 1;
+}
+
+int _mm_fclose(FILE *fp)
+{
+	return fclose(fp);
+}
+
+/* Sets the current file-position as the new iobase */
+void _mm_iobase_setcur(MREADER* reader)
+{
+	reader->prev_iobase=reader->iobase;  /* store old value in case of revert */
+	reader->iobase=reader->Tell(reader);
+}
+
+/* Reverts to the last known iobase value. */
+void _mm_iobase_revert(MREADER* reader)
+{
+	reader->iobase=reader->prev_iobase;
+}
+
+/*========== File Reader */
+
+typedef struct MFILEREADER {
+	MREADER core;
+	FILE*   file;
+} MFILEREADER;
+
+static BOOL _mm_FileReader_Eof(MREADER* reader)
+{
+	return feof(((MFILEREADER*)reader)->file);
+}
+
+static BOOL _mm_FileReader_Read(MREADER* reader,void* ptr,size_t size)
+{
+	return !!fread(ptr,size,1,((MFILEREADER*)reader)->file);
+}
+
+static int _mm_FileReader_Get(MREADER* reader)
+{
+	return fgetc(((MFILEREADER*)reader)->file);
+}
+
+static int _mm_FileReader_Seek(MREADER* reader,long offset,int whence)
+{
+	return fseek(((MFILEREADER*)reader)->file,
+				 (whence==SEEK_SET)?offset+reader->iobase:offset,whence);
+}
+
+static long _mm_FileReader_Tell(MREADER* reader)
+{
+	return ftell(((MFILEREADER*)reader)->file)-reader->iobase;
+}
+
+MREADER *_mm_new_file_reader(FILE* fp)
+{
+	MFILEREADER* reader=(MFILEREADER*)MikMod_calloc(1,sizeof(MFILEREADER));
+	if (reader) {
+		reader->core.Eof =&_mm_FileReader_Eof;
+		reader->core.Read=&_mm_FileReader_Read;
+		reader->core.Get =&_mm_FileReader_Get;
+		reader->core.Seek=&_mm_FileReader_Seek;
+		reader->core.Tell=&_mm_FileReader_Tell;
+		reader->file=fp;
+	}
+	return (MREADER*)reader;
+}
+
+void _mm_delete_file_reader (MREADER* reader)
+{
+	MikMod_free(reader);
+}
+
+/*========== File Writer */
+
+typedef struct MFILEWRITER {
+	MWRITER core;
+	FILE*   file;
+} MFILEWRITER;
+
+static int _mm_FileWriter_Seek(MWRITER* writer,long offset,int whence)
+{
+	return fseek(((MFILEWRITER*)writer)->file,offset,whence);
+}
+
+static long _mm_FileWriter_Tell(MWRITER* writer)
+{
+	return ftell(((MFILEWRITER*)writer)->file);
+}
+
+static BOOL _mm_FileWriter_Write(MWRITER* writer, const void* ptr, size_t size)
+{
+	return (fwrite(ptr,size,1,((MFILEWRITER*)writer)->file)==size);
+}
+
+static int _mm_FileWriter_Put(MWRITER* writer,int value)
+{
+	return fputc(value,((MFILEWRITER*)writer)->file);
+}
+
+MWRITER *_mm_new_file_writer(FILE* fp)
+{
+	MFILEWRITER* writer=(MFILEWRITER*)MikMod_calloc(1,sizeof(MFILEWRITER));
+	if (writer) {
+		writer->core.Seek =&_mm_FileWriter_Seek;
+		writer->core.Tell =&_mm_FileWriter_Tell;
+		writer->core.Write=&_mm_FileWriter_Write;
+		writer->core.Put  =&_mm_FileWriter_Put;
+		writer->file=fp;
+	}
+	return (MWRITER*) writer;
+}
+
+void _mm_delete_file_writer (MWRITER* writer)
+{
+	MikMod_free (writer);
+}
+
+/*========== Memory Reader */
+
+typedef struct MMEMREADER {
+	MREADER core;
+	const void *buffer;
+	long len;
+	long pos;
+} MMEMREADER;
+
+void _mm_delete_mem_reader(MREADER* reader)
+{
+	MikMod_free(reader);
+}
+
+MREADER *_mm_new_mem_reader(const void *buffer, long len)
+{
+	MMEMREADER* reader=(MMEMREADER*)MikMod_calloc(1,sizeof(MMEMREADER));
+	if (reader)
+	{
+		reader->core.Eof =&_mm_MemReader_Eof;
+		reader->core.Read=&_mm_MemReader_Read;
+		reader->core.Get =&_mm_MemReader_Get;
+		reader->core.Seek=&_mm_MemReader_Seek;
+		reader->core.Tell=&_mm_MemReader_Tell;
+		reader->buffer = buffer;
+		reader->len = len;
+		reader->pos = 0;
+	}
+	return (MREADER*)reader;
+}
+
+static BOOL _mm_MemReader_Eof(MREADER* reader)
+{
+	MMEMREADER* mr = (MMEMREADER*) reader;
+	if (!mr) return 1;
+	if (mr->pos >= mr->len) return 1;
+	return 0;
+}
+
+static BOOL _mm_MemReader_Read(MREADER* reader,void* ptr,size_t size)
+{
+	unsigned char *d;
+	const unsigned char *s;
+	MMEMREADER* mr;
+	long siz;
+	BOOL ret;
+
+	if (!reader || !size || (size > (size_t) LONG_MAX))
+		return 0;
+
+	mr = (MMEMREADER*) reader;
+	siz = (long) size;
+	if (mr->pos >= mr->len) return 0;	/* @ eof */
+	if (mr->pos + siz > mr->len) {
+		siz = mr->len - mr->pos;
+		ret = 0; /* not enough remaining bytes */
+	}
+	else {
+		ret = 1;
+	}
+
+	s = (const unsigned char *) mr->buffer;
+	s += mr->pos;
+	mr->pos += siz;
+	d = (unsigned char *) ptr;
+
+	while (siz) {
+		*d++ = *s++;
+		siz--;
+	}
+
+	return ret;
+}
+
+static int _mm_MemReader_Get(MREADER* reader)
+{
+	MMEMREADER* mr;
+	int c;
+
+	mr = (MMEMREADER*) reader;
+	if (mr->pos >= mr->len) return EOF;
+	c = ((const unsigned char*) mr->buffer)[mr->pos];
+	mr->pos++;
+
+	return c;
+}
+
+static int _mm_MemReader_Seek(MREADER* reader,long offset,int whence)
+{
+	MMEMREADER* mr;
+
+	if (!reader) return -1;
+	mr = (MMEMREADER*) reader;
+	switch(whence)
+	{
+	case SEEK_CUR:
+		mr->pos += offset;
+		break;
+	case SEEK_SET:
+		mr->pos = reader->iobase + offset;
+		break;
+	case SEEK_END:
+		mr->pos = mr->len + offset;
+		break;
+	}
+	if (mr->pos < reader->iobase) {
+		mr->pos = mr->core.iobase;
+		return -1;
+	}
+	if (mr->pos > mr->len) {
+		mr->pos = mr->len;
+	}
+	return 0;
+}
+
+static long _mm_MemReader_Tell(MREADER* reader)
+{
+	if (reader) {
+		return ((MMEMREADER*)reader)->pos - reader->iobase;
+	}
+	return 0;
+}
+
+/*========== Write functions */
+
+void _mm_write_string(const CHAR* data,MWRITER* writer)
+{
+	if(data)
+		_mm_write_UBYTES(data,strlen(data),writer);
+}
+
+void _mm_write_M_UWORD(UWORD data,MWRITER* writer)
+{
+	_mm_write_UBYTE(data>>8,writer);
+	_mm_write_UBYTE(data&0xff,writer);
+}
+
+void _mm_write_I_UWORD(UWORD data,MWRITER* writer)
+{
+	_mm_write_UBYTE(data&0xff,writer);
+	_mm_write_UBYTE(data>>8,writer);
+}
+
+void _mm_write_M_ULONG(ULONG data,MWRITER* writer)
+{
+	_mm_write_M_UWORD(data>>16,writer);
+	_mm_write_M_UWORD(data&0xffff,writer);
+}
+
+void _mm_write_I_ULONG(ULONG data,MWRITER* writer)
+{
+	_mm_write_I_UWORD(data&0xffff,writer);
+	_mm_write_I_UWORD(data>>16,writer);
+}
+
+void _mm_write_M_SWORD(SWORD data,MWRITER* writer)
+{
+	_mm_write_M_UWORD((UWORD)data,writer);
+}
+
+void _mm_write_I_SWORD(SWORD data,MWRITER* writer)
+{
+	_mm_write_I_UWORD((UWORD)data,writer);
+}
+
+void _mm_write_M_SLONG(SLONG data,MWRITER* writer)
+{
+	_mm_write_M_ULONG((ULONG)data,writer);
+}
+
+void _mm_write_I_SLONG(SLONG data,MWRITER* writer)
+{
+	_mm_write_I_ULONG((ULONG)data,writer);
+}
+
+void _mm_write_M_SWORDS(SWORD *buffer,int cnt,MWRITER* writer)
+{
+	while(cnt-- > 0) _mm_write_M_SWORD(*(buffer++),writer);
+}
+
+void _mm_write_M_UWORDS(UWORD *buffer,int cnt,MWRITER* writer)
+{
+	while(cnt-- > 0) _mm_write_M_UWORD(*(buffer++),writer);
+}
+
+void _mm_write_I_SWORDS(SWORD *buffer,int cnt,MWRITER* writer)
+{
+	while(cnt-- > 0) _mm_write_I_SWORD(*(buffer++),writer);
+}
+
+void _mm_write_I_UWORDS(UWORD *buffer,int cnt,MWRITER* writer)
+{
+	while(cnt-- > 0) _mm_write_I_UWORD(*(buffer++),writer);
+}
+
+void _mm_write_M_SLONGS(SLONG *buffer,int cnt,MWRITER* writer)
+{
+	while(cnt-- > 0) _mm_write_M_SLONG(*(buffer++),writer);
+}
+
+void _mm_write_M_ULONGS(ULONG *buffer,int cnt,MWRITER* writer)
+{
+	while(cnt-- > 0) _mm_write_M_ULONG(*(buffer++),writer);
+}
+
+void _mm_write_I_SLONGS(SLONG *buffer,int cnt,MWRITER* writer)
+{
+	while(cnt-- > 0) _mm_write_I_SLONG(*(buffer++),writer);
+}
+
+void _mm_write_I_ULONGS(ULONG *buffer,int cnt,MWRITER* writer)
+{
+	while(cnt-- > 0) _mm_write_I_ULONG(*(buffer++),writer);
+}
+
+/*========== Read functions */
+
+BOOL _mm_read_string(CHAR* buffer,int cnt,MREADER* reader)
+{
+	return reader->Read(reader,buffer,cnt);
+}
+
+UWORD _mm_read_M_UWORD(MREADER* reader)
+{
+	UWORD result=((UWORD)_mm_read_UBYTE(reader))<<8;
+	result|=_mm_read_UBYTE(reader);
+	return result;
+}
+
+UWORD _mm_read_I_UWORD(MREADER* reader)
+{
+	UWORD result=_mm_read_UBYTE(reader);
+	result|=((UWORD)_mm_read_UBYTE(reader))<<8;
+	return result;
+}
+
+ULONG _mm_read_M_ULONG(MREADER* reader)
+{
+	ULONG result=((ULONG)_mm_read_M_UWORD(reader))<<16;
+	result|=_mm_read_M_UWORD(reader);
+	return result;
+}
+
+ULONG _mm_read_I_ULONG(MREADER* reader)
+{
+	ULONG result=_mm_read_I_UWORD(reader);
+	result|=((ULONG)_mm_read_I_UWORD(reader))<<16;
+	return result;
+}
+
+SWORD _mm_read_M_SWORD(MREADER* reader)
+{
+	return((SWORD)_mm_read_M_UWORD(reader));
+}
+
+SWORD _mm_read_I_SWORD(MREADER* reader)
+{
+	return((SWORD)_mm_read_I_UWORD(reader));
+}
+
+SLONG _mm_read_M_SLONG(MREADER* reader)
+{
+	return((SLONG)_mm_read_M_ULONG(reader));
+}
+
+SLONG _mm_read_I_SLONG(MREADER* reader)
+{
+	return((SLONG)_mm_read_I_ULONG(reader));
+}
+
+BOOL _mm_read_M_SWORDS(SWORD *buffer,int cnt,MREADER* reader)
+{
+	while(cnt-- > 0) *(buffer++)=_mm_read_M_SWORD(reader);
+	return !reader->Eof(reader);
+}
+
+BOOL _mm_read_M_UWORDS(UWORD *buffer,int cnt,MREADER* reader)
+{
+	while(cnt-- > 0) *(buffer++)=_mm_read_M_UWORD(reader);
+	return !reader->Eof(reader);
+}
+
+BOOL _mm_read_I_SWORDS(SWORD *buffer,int cnt,MREADER* reader)
+{
+	while(cnt-- > 0) *(buffer++)=_mm_read_I_SWORD(reader);
+	return !reader->Eof(reader);
+}
+
+BOOL _mm_read_I_UWORDS(UWORD *buffer,int cnt,MREADER* reader)
+{
+	while(cnt-- > 0) *(buffer++)=_mm_read_I_UWORD(reader);
+	return !reader->Eof(reader);
+}
+
+BOOL _mm_read_M_SLONGS(SLONG *buffer,int cnt,MREADER* reader)
+{
+	while(cnt-- > 0) *(buffer++)=_mm_read_M_SLONG(reader);
+	return !reader->Eof(reader);
+}
+
+BOOL _mm_read_M_ULONGS(ULONG *buffer,int cnt,MREADER* reader)
+{
+	while(cnt-- > 0) *(buffer++)=_mm_read_M_ULONG(reader);
+	return !reader->Eof(reader);
+}
+
+BOOL _mm_read_I_SLONGS(SLONG *buffer,int cnt,MREADER* reader)
+{
+	while(cnt-- > 0) *(buffer++)=_mm_read_I_SLONG(reader);
+	return !reader->Eof(reader);
+}
+
+BOOL _mm_read_I_ULONGS(ULONG *buffer,int cnt,MREADER* reader)
+{
+	while(cnt-- > 0) *(buffer++)=_mm_read_I_ULONG(reader);
+	return !reader->Eof(reader);
+}
+
+/* ex:set ts=4: */