diff options
Diffstat (limited to 'apps/plugins/mikmod/mmio/mmio.c')
| -rw-r--r-- | apps/plugins/mikmod/mmio/mmio.c | 427 |
1 files changed, 427 insertions, 0 deletions
diff --git a/apps/plugins/mikmod/mmio/mmio.c b/apps/plugins/mikmod/mmio/mmio.c new file mode 100644 index 0000000..50269fb --- /dev/null +++ b/apps/plugins/mikmod/mmio/mmio.c @@ -0,0 +1,427 @@ +/* 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: mmio.c,v 1.2 2004/02/06 19:29:05 raph Exp $
+
+ 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.
+
+*/
+
+/* FIXME
+ the _mm_iobase variable ought to be MREADER-specific. It will eventually
+ become a private field of the MREADER structure, but this will require a
+ soname version bump.
+
+ In the meantime, the drawback is that if you use the xxx_LoadFP functions,
+ you can't have several MREADER objects with different iobase values.
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include <stdio.h>
+#include <string.h>
+
+#include "mikmod_internals.h"
+
+#define COPY_BUFSIZE 1024
+
+static long _mm_iobase=0,temp_iobase=0;
+
+
+int _mm_fopen(CHAR* fname,int attrib)
+{
+ int fp;
+
+ fp=rb->open(fname,attrib);
+ if(fp == -1) {
+ fp = 0;
+ _mm_errno = MMERR_OPENING_FILE;
+ if(_mm_errorhandler) _mm_errorhandler();
+ }
+ return fp;
+}
+
+BOOL _mm_FileExists(CHAR* fname)
+{
+ int fp;
+
+ if(!(fp=rb->open(fname, O_RDONLY))) return 0;
+ rb->close(fp);
+
+ return 1;
+}
+
+int _mm_fclose(int fp)
+{
+ return rb->close(fp);
+}
+
+/* Sets the current file-position as the new _mm_iobase */
+void _mm_iobase_setcur(MREADER* reader)
+{
+ temp_iobase=_mm_iobase; /* store old value in case of revert */
+ _mm_iobase=reader->Tell(reader);
+}
+
+/* Reverts to the last known _mm_iobase value. */
+void _mm_iobase_revert(void)
+{
+ _mm_iobase=temp_iobase;
+}
+
+/*========== File Reader */
+
+typedef struct MFILEREADER {
+ MREADER core;
+ int file;
+ int waseof;
+} MFILEREADER;
+
+static BOOL _mm_FileReader_Eof(MREADER* reader)
+{
+ /*
+ if ((lseek(((MFILEREADER*)reader)->file, 0, SEEK_CUR)-_mm_iobase) < filesize(((MFILEREADER*)reader)->file))
+ return 0;
+ else
+ return 1;
+ */
+ return ((MFILEREADER*)reader)->waseof;
+}
+
+static BOOL _mm_FileReader_Read(MREADER* reader,void* ptr,size_t size)
+{
+ int tempb;
+ tempb = rb->read(((MFILEREADER*)reader)->file, ptr, size);
+ //printf("(**) READ: %i\n", tempb);
+ /*
+ if (tempb != size)
+ {
+ printf("Read: count: %i newpos: %i return: %i\n", size, lseek(((MFILEREADER*)reader)->file-_mm_iobase, 0, SEEK_CUR), tempb);
+ }
+ */
+ if ((tempb < 1) && size > 0)
+ {
+ tempb = 0;
+ ((MFILEREADER*)reader)->waseof = 1;
+ }
+ else
+ {
+ ((MFILEREADER*)reader)->waseof = 0;
+ }
+ return tempb;
+}
+
+static int _mm_FileReader_Get(MREADER* reader)
+{
+ char buf;
+ if ((rb->read(((MFILEREADER*)reader)->file, &buf, 1) > 0) == 1)
+ {
+ ((MFILEREADER*)reader)->waseof = 0;
+ //printf("Get: newpos: %i _mm_iobase: %i\n", lseek(((MFILEREADER*)reader)->file-_mm_iobase, 0, SEEK_CUR), _mm_iobase);
+ return buf;
+ }
+ else
+ {
+ ((MFILEREADER*)reader)->waseof = 1;
+ //printf("Get: newpos: %i _mm_iobase: %i\n", lseek(((MFILEREADER*)reader)->file-_mm_iobase, 0, SEEK_CUR), _mm_iobase);
+ return EOF;
+ }
+}
+
+static BOOL _mm_FileReader_Seek(MREADER* reader,long offset,int whence)
+{
+ long tempb;
+
+ tempb = rb->lseek(((MFILEREADER*)reader)->file,
+ (whence==SEEK_SET)?offset+_mm_iobase:offset,whence);
+ ((MFILEREADER*)reader)->waseof = 0;
+ //printf("(**) SEEK: %i\n", tempb);
+ if (tempb < 0)
+ {
+ //printf("Seek: count: %i newpos: %i return: %i\n", offset, lseek(((MFILEREADER*)reader)->file-_mm_iobase, 0, SEEK_CUR), tempb);
+ return 1;
+ }
+ else
+ {
+ return 0;
+ }
+}
+
+static long _mm_FileReader_Tell(MREADER* reader)
+{
+ return rb->lseek(((MFILEREADER*)reader)->file, 0, SEEK_CUR)-_mm_iobase;
+}
+
+MREADER *_mm_new_file_reader(int fp)
+{
+ MFILEREADER* reader=(MFILEREADER*)_mm_malloc(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;
+ reader->waseof = 0;
+ }
+ return (MREADER*)reader;
+}
+
+void _mm_delete_file_reader (MREADER* reader)
+{
+ if(reader) free(reader);
+}
+
+/*========== File Writer */
+
+typedef struct MFILEWRITER {
+ MWRITER core;
+ int file;
+} MFILEWRITER;
+
+static BOOL _mm_FileWriter_Seek(MWRITER* writer,long offset,int whence)
+{
+ return rb->lseek(((MFILEWRITER*)writer)->file,offset,whence);
+}
+
+static long _mm_FileWriter_Tell(MWRITER* writer)
+{
+ return rb->lseek(((MFILEREADER*)writer)->file, 0, SEEK_CUR);
+}
+
+static BOOL _mm_FileWriter_Write(MWRITER* writer,void* ptr,size_t size)
+{
+ return (rb->write(((MFILEWRITER*)writer)->file, ptr, size)==size);
+}
+
+static BOOL _mm_FileWriter_Put(MWRITER* writer,int value)
+{
+ char buf = value;
+ if (rb->write(((MFILEWRITER*)writer)->file, &buf, 1))
+ return 0;
+ else
+ return -1;
+}
+
+MWRITER *_mm_new_file_writer(int fp)
+{
+ MFILEWRITER* writer=(MFILEWRITER*)_mm_malloc(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)
+{
+ if(writer) free (writer);
+}
+
+/*========== Write functions */
+
+void _mm_write_string(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((UWORD)(data>>16),writer);
+ _mm_write_M_UWORD((UWORD)(data&0xffff),writer);
+}
+
+void _mm_write_I_ULONG(ULONG data,MWRITER* writer)
+{
+ _mm_write_I_UWORD((UWORD)(data&0xffff),writer);
+ _mm_write_I_UWORD((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);
+}
+
+#if defined __STDC__ || defined _MSC_VER || defined MPW_C
+#define DEFINE_MULTIPLE_WRITE_FUNCTION(type_name,type) \
+void _mm_write_##type_name##S (type *buffer,int number,MWRITER* writer) \
+{ \
+ while(number-->0) \
+ _mm_write_##type_name(*(buffer++),writer); \
+}
+#else
+#define DEFINE_MULTIPLE_WRITE_FUNCTION(type_name,type) \
+void _mm_write_/**/type_name/**/S (type *buffer,int number,MWRITER* writer) \
+{ \
+ while(number-->0) \
+ _mm_write_/**/type_name(*(buffer++),writer); \
+}
+#endif
+
+DEFINE_MULTIPLE_WRITE_FUNCTION(M_SWORD,SWORD)
+DEFINE_MULTIPLE_WRITE_FUNCTION(M_UWORD,UWORD)
+DEFINE_MULTIPLE_WRITE_FUNCTION(I_SWORD,SWORD)
+DEFINE_MULTIPLE_WRITE_FUNCTION(I_UWORD,UWORD)
+
+DEFINE_MULTIPLE_WRITE_FUNCTION(M_SLONG,SLONG)
+DEFINE_MULTIPLE_WRITE_FUNCTION(M_ULONG,ULONG)
+DEFINE_MULTIPLE_WRITE_FUNCTION(I_SLONG,SLONG)
+DEFINE_MULTIPLE_WRITE_FUNCTION(I_ULONG,ULONG)
+
+/*========== Read functions */
+
+int _mm_read_string(CHAR* buffer,int number,MREADER* reader)
+{
+ return reader->Read(reader,buffer,number);
+}
+
+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));
+}
+
+#if defined __STDC__ || defined _MSC_VER || defined MPW_C
+#define DEFINE_MULTIPLE_READ_FUNCTION(type_name,type) \
+int _mm_read_##type_name##S (type *buffer,int number,MREADER* reader) \
+{ \
+ while(number-->0) \
+ *(buffer++)=_mm_read_##type_name(reader); \
+ return !reader->Eof(reader); \
+}
+#else
+#define DEFINE_MULTIPLE_READ_FUNCTION(type_name,type) \
+int _mm_read_/**/type_name/**/S (type *buffer,int number,MREADER* reader) \
+{ \
+ while(number-->0) \
+ *(buffer++)=_mm_read_/**/type_name(reader); \
+ return !reader->Eof(reader); \
+}
+#endif
+
+DEFINE_MULTIPLE_READ_FUNCTION(M_SWORD,SWORD)
+DEFINE_MULTIPLE_READ_FUNCTION(M_UWORD,UWORD)
+DEFINE_MULTIPLE_READ_FUNCTION(I_SWORD,SWORD)
+DEFINE_MULTIPLE_READ_FUNCTION(I_UWORD,UWORD)
+
+DEFINE_MULTIPLE_READ_FUNCTION(M_SLONG,SLONG)
+DEFINE_MULTIPLE_READ_FUNCTION(M_ULONG,ULONG)
+DEFINE_MULTIPLE_READ_FUNCTION(I_SLONG,SLONG)
+DEFINE_MULTIPLE_READ_FUNCTION(I_ULONG,ULONG)
+
+/* ex:set ts=4: */
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