32a595222d
Made the OpenMPT / legacy OpenMPT and mpg123 libraries pre-built. Changed the OpenMPT and vgmstream plugins to import the libraries as they are now. Made mpg123 embedded and imported by the main binary, since it's now shared by two plugins. Signed-off-by: Christopher Snowhill <kode54@gmail.com>
132 lines
2.9 KiB
C
132 lines
2.9 KiB
C
/*
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* libopenmpt_stream_callbacks_file.h
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* ----------------------------------
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* Purpose: libopenmpt public c interface
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* Notes : (currently none)
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* Authors: OpenMPT Devs
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* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
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*/
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#ifndef LIBOPENMPT_STREAM_CALLBACKS_FILE_H
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#define LIBOPENMPT_STREAM_CALLBACKS_FILE_H
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#include "libopenmpt.h"
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#include <limits.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#ifdef _MSC_VER
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#include <wchar.h> /* off_t */
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#endif
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/*! \addtogroup libopenmpt_c
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* @{
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* This stuff has to be in a header file because of possibly different MSVC CRTs which cause problems for FILE * crossing CRT boundaries. */
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static size_t openmpt_stream_file_read_func( void * stream, void * dst, size_t bytes ) {
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FILE * f = 0;
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size_t retval = 0;
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f = (FILE*)stream;
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if ( !f ) {
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return 0;
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}
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retval = fread( dst, 1, bytes, f );
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if ( retval <= 0 ) {
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return 0;
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}
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return retval;
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}
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static int openmpt_stream_file_seek_func( void * stream, int64_t offset, int whence ) {
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FILE * f = 0;
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int fwhence = 0;
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f = (FILE*)stream;
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if ( !f ) {
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return -1;
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}
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switch ( whence ) {
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#if defined(SEEK_SET)
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case OPENMPT_STREAM_SEEK_SET:
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fwhence = SEEK_SET;
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break;
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#endif
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#if defined(SEEK_CUR)
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case OPENMPT_STREAM_SEEK_CUR:
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fwhence = SEEK_CUR;
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break;
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#endif
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#if defined(SEEK_END)
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case OPENMPT_STREAM_SEEK_END:
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fwhence = SEEK_END;
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break;
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#endif
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default:
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return -1;
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break;
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}
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#if defined(_MSC_VER)
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return _fseeki64( f, offset, fwhence ) ? -1 : 0;
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#elif defined(_POSIX_SOURCE) && (_POSIX_SOURCE == 1)
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return fseeko( f, offset, fwhence ) ? -1 : 0;
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#else
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return fseek( f, offset, fwhence ) ? -1 : 0;
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#endif
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}
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static int64_t openmpt_stream_file_tell_func( void * stream ) {
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FILE * f = 0;
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int64_t retval = 0;
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f = (FILE*)stream;
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if ( !f ) {
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return -1;
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}
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#if defined(_MSC_VER)
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retval = _ftelli64( f );
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#elif defined(_POSIX_SOURCE) && (_POSIX_SOURCE == 1)
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retval = ftello( f );
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#else
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retval = ftell( f );
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#endif
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if ( retval < 0 ) {
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return -1;
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}
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return retval;
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}
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/*! \brief Provide openmpt_stream_callbacks for standard C FILE objects
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*
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* Fills openmpt_stream_callbacks suitable for passing a standard C FILE object as a stream parameter to functions doing file input/output.
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*
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* \remarks The stream argument must be passed as `(void*)(FILE*)file`.
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* \sa \ref libopenmpt_c_fileio
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* \sa openmpt_stream_callbacks
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* \sa openmpt_could_open_probability2
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* \sa openmpt_probe_file_header_from_stream
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* \sa openmpt_module_create2
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*/
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static openmpt_stream_callbacks openmpt_stream_get_file_callbacks(void) {
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openmpt_stream_callbacks retval;
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memset( &retval, 0, sizeof( openmpt_stream_callbacks ) );
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retval.read = openmpt_stream_file_read_func;
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retval.seek = openmpt_stream_file_seek_func;
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retval.tell = openmpt_stream_file_tell_func;
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return retval;
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}
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#ifdef __cplusplus
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}
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#endif
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/*!
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* @}
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*/
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#endif /* LIBOPENMPT_STREAM_CALLBACKS_FILE_H */
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