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>
101 lines
2.2 KiB
C
101 lines
2.2 KiB
C
/*
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* libopenmpt_stream_callbacks_fd.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_FD_H
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#define LIBOPENMPT_STREAM_CALLBACKS_FD_H
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#include "libopenmpt.h"
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#ifdef _MSC_VER
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#include <io.h>
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#endif
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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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#ifndef _MSC_VER
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#include <unistd.h>
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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 fd crossing CRT boundaries. */
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static size_t openmpt_stream_fd_read_func( void * stream, void * dst, size_t bytes ) {
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int fd = 0;
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#if defined(_MSC_VER)
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size_t retval = 0;
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int to_read = 0;
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int ret_read = 0;
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#else
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ssize_t retval = 0;
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#endif
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fd = (int)(uintptr_t)stream;
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if ( fd < 0 ) {
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return 0;
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}
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#if defined(_MSC_VER)
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retval = 0;
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while ( bytes > 0 ) {
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to_read = 0;
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if ( bytes < (size_t)INT_MAX ) {
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to_read = (int)bytes;
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} else {
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to_read = INT_MAX;
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}
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ret_read = _read( fd, dst, to_read );
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if ( ret_read <= 0 ) {
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return retval;
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}
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bytes -= ret_read;
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retval += ret_read;
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}
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#else
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retval = read( fd, dst, bytes );
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#endif
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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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/*! \brief Provide openmpt_stream_callbacks for standard POSIX file descriptors
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*
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* Fills openmpt_stream_callbacks suitable for passing a POSIX filer descriptor 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*)(uintptr_t)(int)fd`.
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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_fd_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_fd_read_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_FD_H */
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