+++ /dev/null
-/*
- lfs_wrap: Crappy wrapper code for supporting crappy ambiguous large file support.
-
- copyright 2010 by the mpg123 project - free software under the terms of the LGPL 2.1
- see COPYING and AUTHORS files in distribution or http://mpg123.org
-
- initially written by Thomas Orgis, thanks to Guido Draheim for consulting
-
- This file contains wrappers for the case that _FILE_OFFSET_BITS (or equivalent, theoretically, depends on mpg123.h) is defined and thus certain mpg123 API calls get renamed with a suffix (p.ex. _64).
- The renamed calls expect large off_t arguments, and possibly return large off_t values... these wrappers here provide the same functionality with long integer arguments/values.
-
- Prototypical idea: There is
- off_t mpg123_seek_64(mpg123_handle*, off_t, int)
- This code provides
- long mpg123_seek(mpg123_handle*, long, int)
-
- This is rather simple business... wouldn't mpg123 offer replacing the I/O core with callbacks. Translating the callbacks between long and off_t world is the main reason why this file contains non-trivial code.
-
- Note about file descriptors: We just assume that they are generally interchangeable between large and small file code... and that a large file descriptor will trigger errors when accessed with small file code where it may cause trouble (a really large file).
-*/
-
-/* It mainly needs the official API ... */
-/* ... but also some inside access (frame struct, readers). */
-#include "mpg123lib_intern.h"
-/* Include the system headers _after_ the implied config.h!
- Otherwise _FILE_OFFSET_BITS is not in effect! */
-#include <errno.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include "compat.h"
-#include "debug.h"
-
-/*
- Now, start off easy... translate simple API calls.
- I need to deal with these here:
-perl -ne '
-if(/^\s*MPG123_EXPORT\s+(\S+)\s+(mpg123_\S+)\((.*)\);\s*$/)
-{
- $type = $1;
- $name = $2;
- $args = $3;
- next unless ($type =~ /off_t/ or $args =~ /off_t/);
- print "$name\n" unless grep {$_ eq $name}
- ("mpg123_open", "mpg123_open_fd", "mpg123_open_handle", "mpg123_replace_reader", "mpg123_replace_reader_handle");
-}' < mpg123.h.in
-
-mpg123_decode_frame
-mpg123_framebyframe_decode
-mpg123_framepos
-mpg123_tell
-mpg123_tellframe
-mpg123_tell_stream
-mpg123_seek
-mpg123_feedseek
-mpg123_seek_frame
-mpg123_timeframe
-mpg123_index
-mpg123_set_index
-mpg123_position
-mpg123_length
-mpg123_set_filesize
-mpg123_decode_raw ... that's experimental.
-
-Let's work on them in that order.
-*/
-
-/* I see that I will need custom data storage. Main use is for the replaced I/O later, but the seek table for small file offsets needs extra storage, too. */
-
-/* The wrapper handle for descriptor and handle I/O. */
-
-/* The handle is used for nothing (0), or one of these two modes of operation: */
-#define IO_FD 1 /* Wrapping over callbacks operation on integer file descriptor. */
-#define IO_HANDLE 2 /* Wrapping over custom handle callbacks. */
-
-struct wrap_data
-{
- /* Storage for small offset index table. */
- long *indextable;
- /* I/O handle stuff */
- int iotype; /* IO_FD or IO_HANDLE */
- /* Data for IO_FD. */
- int fd;
- int my_fd; /* A descriptor that the wrapper code opened itself. */
- /* The actual callbacks from the outside. */
- ssize_t (*r_read) (int, void *, size_t);
- long (*r_lseek)(int, long, int);
- /* Data for IO_HANDLE. */
- void* handle;
- ssize_t (*r_h_read)(void *, void *, size_t);
- long (*r_h_lseek)(void*, long, int);
- void (*h_cleanup)(void*);
-};
-
-
-/* Cleanup I/O part of the handle handle... but not deleting the wrapper handle itself.
- That is stored in the frame and only deleted on mpg123_delete(). */
-static void wrap_io_cleanup(void *handle)
-{
- struct wrap_data *ioh = handle;
- if(ioh->iotype == IO_HANDLE)
- {
- if(ioh->h_cleanup != NULL && ioh->handle != NULL)
- ioh->h_cleanup(ioh->handle);
-
- ioh->handle = NULL;
- }
- if(ioh->my_fd >= 0)
- {
- close(ioh->my_fd);
- ioh->my_fd = -1;
- }
-}
-
-/* Really finish off the handle... freeing all memory. */
-static void wrap_destroy(void *handle)
-{
- struct wrap_data *wh = handle;
- wrap_io_cleanup(handle);
- if(wh->indextable != NULL)
- free(wh->indextable);
-
- free(wh);
-}
-
-/* More helper code... extract the special wrapper handle, possible allocate and initialize it. */
-static struct wrap_data* wrap_get(mpg123_handle *mh)
-{
- struct wrap_data* whd;
- if(mh == NULL) return NULL;
-
- /* Access the private storage inside the mpg123 handle.
- The real callback functions and handles are stored there. */
- if(mh->wrapperdata == NULL)
- {
- /* Create a new one. */
- mh->wrapperdata = malloc(sizeof(struct wrap_data));
- if(mh->wrapperdata == NULL)
- {
- mh->err = MPG123_OUT_OF_MEM;
- return NULL;
- }
- /* When we have wrapper data present, the callback for its proper cleanup is needed. */
- mh->wrapperclean = wrap_destroy;
-
- whd = mh->wrapperdata;
- whd->indextable = NULL;
- whd->iotype = 0;
- whd->fd = -1;
- whd->my_fd = -1;
- whd->r_read = NULL;
- whd->r_lseek = NULL;
- whd->handle = NULL;
- whd->r_h_read = NULL;
- whd->r_h_lseek = NULL;
- whd->h_cleanup = NULL;
- }
- else whd = mh->wrapperdata;
-
- return whd;
-}
-
-/* After settling the data... start with some simple wrappers. */
-
-#undef mpg123_decode_frame
-/* int mpg123_decode_frame(mpg123_handle *mh, off_t *num, unsigned char **audio, size_t *bytes) */
-int attribute_align_arg mpg123_decode_frame(mpg123_handle *mh, long *num, unsigned char **audio, size_t *bytes)
-{
- off_t largenum;
- int err;
-
- err = MPG123_LARGENAME(mpg123_decode_frame)(mh, &largenum, audio, bytes);
- if(err == MPG123_OK && num != NULL)
- {
- *num = largenum;
- if(*num != largenum)
- {
- mh->err = MPG123_LFS_OVERFLOW;
- err = MPG123_ERR;
- }
- }
- return err;
-}
-
-#undef mpg123_framebyframe_decode
-/* int mpg123_framebyframe_decode(mpg123_handle *mh, off_t *num, unsigned char **audio, size_t *bytes); */
-int attribute_align_arg mpg123_framebyframe_decode(mpg123_handle *mh, long *num, unsigned char **audio, size_t *bytes)
-{
- off_t largenum;
- int err;
-
- err = MPG123_LARGENAME(mpg123_framebyframe_decode)(mh, &largenum, audio, bytes);
- if(err == MPG123_OK && num != NULL)
- {
- *num = largenum;
- if(*num != largenum)
- {
- mh->err = MPG123_LFS_OVERFLOW;
- err = MPG123_ERR;
- }
- }
- return err;
-}
-
-#undef mpg123_framepos
-/* off_t mpg123_framepos(mpg123_handle *mh); */
-long attribute_align_arg mpg123_framepos(mpg123_handle *mh)
-{
- long val;
- off_t largeval;
-
- largeval = MPG123_LARGENAME(mpg123_framepos)(mh);
- val = largeval;
- if(val != largeval)
- {
- mh->err = MPG123_LFS_OVERFLOW;
- return MPG123_ERR;
- }
- return val;
-}
-
-#undef mpg123_tell
-/* off_t mpg123_tell(mpg123_handle *mh); */
-long attribute_align_arg mpg123_tell(mpg123_handle *mh)
-{
- long val;
- off_t largeval;
-
- largeval = MPG123_LARGENAME(mpg123_tell)(mh);
- val = largeval;
- if(val != largeval)
- {
- mh->err = MPG123_LFS_OVERFLOW;
- return MPG123_ERR;
- }
- return val;
-}
-
-#undef mpg123_tellframe
-/* off_t mpg123_tellframe(mpg123_handle *mh); */
-long attribute_align_arg mpg123_tellframe(mpg123_handle *mh)
-{
- long val;
- off_t largeval;
-
- largeval = MPG123_LARGENAME(mpg123_tellframe)(mh);
- val = largeval;
- if(val != largeval)
- {
- mh->err = MPG123_LFS_OVERFLOW;
- return MPG123_ERR;
- }
- return val;
-}
-
-#undef mpg123_tell_stream
-/* off_t mpg123_tell_stream(mpg123_handle *mh); */
-long attribute_align_arg mpg123_tell_stream(mpg123_handle *mh)
-{
- long val;
- off_t largeval;
-
- largeval = MPG123_LARGENAME(mpg123_tell_stream)(mh);
- val = largeval;
- if(val != largeval)
- {
- mh->err = MPG123_LFS_OVERFLOW;
- return MPG123_ERR;
- }
- return val;
-}
-
-#undef mpg123_seek
-/* off_t mpg123_seek(mpg123_handle *mh, off_t sampleoff, int whence); */
-long attribute_align_arg mpg123_seek(mpg123_handle *mh, long sampleoff, int whence)
-{
- long val;
- off_t largeval;
-
- largeval = MPG123_LARGENAME(mpg123_seek)(mh, sampleoff, whence);
- val = largeval;
- if(val != largeval)
- {
- mh->err = MPG123_LFS_OVERFLOW;
- return MPG123_ERR;
- }
- return val;
-}
-
-#undef mpg123_feedseek
-/* off_t mpg123_feedseek(mpg123_handle *mh, off_t sampleoff, int whence, off_t *input_offset); */
-long attribute_align_arg mpg123_feedseek(mpg123_handle *mh, long sampleoff, int whence, long *input_offset)
-{
- long val;
- off_t largeioff;
- off_t largeval;
-
- largeval = MPG123_LARGENAME(mpg123_feedseek)(mh, sampleoff, whence, &largeioff);
- /* Error/message codes are small... */
- if(largeval < 0) return (long)largeval;
-
- val = largeval;
- *input_offset = largeioff;
- if(val != largeval || *input_offset != largeioff)
- {
- mh->err = MPG123_LFS_OVERFLOW;
- return MPG123_ERR;
- }
- return val;
-}
-
-#undef mpg123_seek_frame
-/* off_t mpg123_seek_frame(mpg123_handle *mh, off_t frameoff, int whence); */
-long attribute_align_arg mpg123_seek_frame(mpg123_handle *mh, long frameoff, int whence)
-{
- long val;
- off_t largeval;
-
- largeval = MPG123_LARGENAME(mpg123_seek_frame)(mh, frameoff, whence);
- val = largeval;
- if(val != largeval)
- {
- mh->err = MPG123_LFS_OVERFLOW;
- return MPG123_ERR;
- }
- return val;
-}
-
-#undef mpg123_timeframe
-/* off_t mpg123_timeframe(mpg123_handle *mh, double sec); */
-long attribute_align_arg mpg123_timeframe(mpg123_handle *mh, double sec)
-{
- long val;
- off_t largeval;
-
- largeval = MPG123_LARGENAME(mpg123_timeframe)(mh, sec);
- val = largeval;
- if(val != largeval)
- {
- mh->err = MPG123_LFS_OVERFLOW;
- return MPG123_ERR;
- }
- return val;
-}
-
-/* Now something less simple: Index retrieval and manipulation.
- The index is an _array_ of off_t, which means that I need to construct a copy with translated long values. */
-#undef mpg123_index
-/* int mpg123_index(mpg123_handle *mh, off_t **offsets, off_t *step, size_t *fill) */
-int attribute_align_arg mpg123_index(mpg123_handle *mh, long **offsets, long *step, size_t *fill)
-{
- int err;
- size_t i;
- long smallstep;
- size_t thefill;
- off_t largestep;
- off_t *largeoffsets;
- struct wrap_data *whd;
-
- whd = wrap_get(mh);
- if(whd == NULL) return MPG123_ERR;
-
- err = MPG123_LARGENAME(mpg123_index)(mh, &largeoffsets, &largestep, &thefill);
- if(err != MPG123_OK) return err;
-
- /* For a _very_ large file, even the step could overflow. */
- smallstep = largestep;
- if(smallstep != largestep)
- {
- mh->err = MPG123_LFS_OVERFLOW;
- return MPG123_ERR;
- }
- if(step != NULL) *step = smallstep;
-
- /* When there are no values stored, there is no table content to take care of.
- Table pointer does not matter. Mission completed. */
- if(thefill == 0) return MPG123_OK;
-
- if(fill != NULL) *fill = thefill;
-
- /* Construct a copy of the index to hand over to the small-minded client. */
- *offsets = safe_realloc(whd->indextable, (*fill)*sizeof(long));
- if(*offsets == NULL)
- {
- mh->err = MPG123_OUT_OF_MEM;
- return MPG123_ERR;
- }
- whd->indextable = *offsets;
- /* Elaborate conversion of each index value, with overflow check. */
- for(i=0; i<*fill; ++i)
- {
- whd->indextable[i] = largeoffsets[i];
- if(whd->indextable[i] != largeoffsets[i])
- {
- mh->err = MPG123_LFS_OVERFLOW;
- return MPG123_ERR;
- }
- }
- /* If we came that far... there should be a valid copy of the table now. */
- return MPG123_OK;
-}
-
-/* The writing does basically the same than the above, just the opposite.
- Oh, and the overflow checks are not needed -- off_t is bigger than long. */
-#undef mpg123_set_index
-/* int mpg123_set_index(mpg123_handle *mh, off_t *offsets, off_t step, size_t fill); */
-int attribute_align_arg mpg123_set_index(mpg123_handle *mh, long *offsets, long step, size_t fill)
-{
- int err;
- size_t i;
- struct wrap_data *whd;
- off_t *indextmp;
-
- whd = wrap_get(mh);
- if(whd == NULL) return MPG123_ERR;
-
- /* Expensive temporary storage... for staying outside at the API layer. */
- indextmp = malloc(fill*sizeof(off_t));
- if(indextmp == NULL)
- {
- mh->err = MPG123_OUT_OF_MEM;
- return MPG123_ERR;
- }
-
- if(fill > 0 && offsets == NULL)
- {
- mh->err = MPG123_BAD_INDEX_PAR;
- err = MPG123_ERR;
- }
- else
- {
- /* Fill the large-file copy of the provided index, then feed it to mpg123. */
- for(i=0; i<fill; ++i)
- indextmp[i] = offsets[i];
-
- err = MPG123_LARGENAME(mpg123_set_index)(mh, indextmp, step, fill);
- }
- free(indextmp);
-
- return err;
-}
-
-/* So... breathe... a couple of simple wrappers before the big mess. */
-#undef mpg123_position
-/* int mpg123_position( mpg123_handle *mh, off_t frame_offset, off_t buffered_bytes, off_t *current_frame, off_t *frames_left, double *current_seconds, double *seconds_left); */
-int attribute_align_arg mpg123_position(mpg123_handle *mh, long frame_offset, long buffered_bytes, long *current_frame, long *frames_left, double *current_seconds, double *seconds_left)
-{
- off_t curframe, frameleft;
- long small_curframe, small_frameleft;
- int err;
-
- err = MPG123_LARGENAME(mpg123_position)(mh, frame_offset, buffered_bytes, &curframe, &frameleft, current_seconds, seconds_left);
- if(err != MPG123_OK) return err;
-
- small_curframe = curframe;
- small_frameleft = frameleft;
- if(small_curframe != curframe || small_frameleft != frameleft)
- {
- mh->err = MPG123_LFS_OVERFLOW;
- return MPG123_ERR;
- }
-
- if(current_frame != NULL) *current_frame = small_curframe;
-
- if(frames_left != NULL) *frames_left = small_frameleft;
-
-
- return MPG123_OK;
-}
-
-#undef mpg123_length
-/* off_t mpg123_length(mpg123_handle *mh); */
-long attribute_align_arg mpg123_length(mpg123_handle *mh)
-{
- long val;
- off_t largeval;
-
- largeval = MPG123_LARGENAME(mpg123_length)(mh);
- val = largeval;
- if(val != largeval)
- {
- mh->err = MPG123_LFS_OVERFLOW;
- return MPG123_ERR;
- }
- return val;
-}
-
-/* The simplest wrapper of all... */
-#undef mpg123_set_filesize
-/* int mpg123_set_filesize(mpg123_handle *mh, off_t size); */
-int attribute_align_arg mpg123_set_filesize(mpg123_handle *mh, long size)
-{
- return MPG123_LARGENAME(mpg123_set_filesize)(mh, size);
-}
-
-
-/* =========================================
- THE BOUNDARY OF SANITY
- Behold, stranger!
- ========================================= */
-
-
-/*
- The messy part: Replacement of I/O core (actally, this is only due to lseek()).
- Both descriptor and handle replaced I/O are mapped to replaced handle I/O, the handle wrapping over the actual callbacks and the actual handle/descriptor.
- You got multiple levels of handles and callbacks to think about. Have fun reading and comprehending.
-*/
-
-/* Could go into compat.h ... Windows needs that flag. */
-#ifndef O_BINARY
-#define O_BINARY 0
-#endif
-
-/* Read callback needs nothing special. */
-ssize_t wrap_read(void* handle, void *buf, size_t count)
-{
- struct wrap_data *ioh = handle;
- switch(ioh->iotype)
- {
- case IO_FD: return ioh->r_read(ioh->fd, buf, count);
- case IO_HANDLE: return ioh->r_h_read(ioh->handle, buf, count);
- }
- error("Serious breakage - bad IO type in LFS wrapper!");
- return -1;
-}
-
-/* Seek callback needs protection from too big offsets. */
-off_t wrap_lseek(void *handle, off_t offset, int whence)
-{
- struct wrap_data *ioh = handle;
- long smalloff = offset;
- if(smalloff == offset)
- {
- switch(ioh->iotype)
- {
- case IO_FD: return ioh->r_lseek(ioh->fd, smalloff, whence);
- case IO_HANDLE: return ioh->r_h_lseek(ioh->handle, smalloff, whence);
- }
- error("Serious breakage - bad IO type in LFS wrapper!");
- return -1;
- }
- else
- {
- errno = EOVERFLOW;
- return -1;
- }
-}
-
-
-/*
- Now, let's replace the API dealing with replacement I/O.
- Start with undefining the renames...
-*/
-
-#undef mpg123_replace_reader
-#undef mpg123_replace_reader_handle
-#undef mpg123_open
-#undef mpg123_open_fd
-#undef mpg123_open_handle
-
-
-/* Normal reader replacement needs fallback implementations. */
-static ssize_t fallback_read(int fd, void *buf, size_t count)
-{
- return read(fd, buf, count);
-}
-
-static long fallback_lseek(int fd, long offset, int whence)
-{
- /* Since the offset is long int already, the returned value really should fit into a long... but whatever. */
- long newpos_long;
- off_t newpos;
- newpos = lseek(fd, offset, whence);
- newpos_long = newpos;
- if(newpos_long == newpos)
- return newpos_long;
- else
- {
- errno = EOVERFLOW;
- return -1;
- }
-}
-
-/* Reader replacement prepares the hidden handle storage for next mpg123_open_fd() or plain mpg123_open(). */
-int attribute_align_arg mpg123_replace_reader(mpg123_handle *mh, ssize_t (*r_read) (int, void *, size_t), long (*r_lseek)(int, long, int) )
-{
- struct wrap_data* ioh;
-
- if(mh == NULL) return MPG123_ERR;
-
- mpg123_close(mh);
- ioh = wrap_get(mh);
- if(ioh == NULL) return MPG123_ERR;
-
- /* If both callbacks are NULL, switch totally to internal I/O, else just use fallback for at most half of them. */
- if(r_read == NULL && r_lseek == NULL)
- {
- /* Only the type is actually important to disable the code. */
- ioh->iotype = 0;
- ioh->fd = -1;
- ioh->r_read = NULL;
- ioh->r_lseek = NULL;
- }
- else
- {
- ioh->iotype = IO_FD;
- ioh->fd = -1; /* On next mpg123_open_fd(), this gets a value. */
- ioh->r_read = r_read != NULL ? r_read : fallback_read;
- ioh->r_lseek = r_lseek != NULL ? r_lseek : fallback_lseek;
- }
-
- /* The real reader replacement will happen while opening. */
- return MPG123_OK;
-}
-
-int attribute_align_arg mpg123_replace_reader_handle(mpg123_handle *mh, ssize_t (*r_read) (void*, void *, size_t), long (*r_lseek)(void*, long, int), void (*cleanup)(void*))
-{
- struct wrap_data* ioh;
-
- if(mh == NULL) return MPG123_ERR;
-
- mpg123_close(mh);
- ioh = wrap_get(mh);
- if(ioh == NULL) return MPG123_ERR;
-
- ioh->iotype = IO_HANDLE;
- ioh->handle = NULL;
- ioh->r_h_read = r_read;
- ioh->r_h_lseek = r_lseek;
- ioh->h_cleanup = cleanup;
-
- /* The real reader replacement will happen while opening. */
- return MPG123_OK;
-}
-
-/*
- The open routines always need to watch out for a prepared wrapper handle to use replaced normal I/O.
- Two cases to consider:
- 1. Plain normal open using internal I/O.
- 2. Client called mpg123_replace_reader() before.
- The second case needs hackery to activate the client I/O callbacks. For that, we create a custom I/O handle and use the guts of mpg123_open_fd() on it.
-*/
-int attribute_align_arg mpg123_open(mpg123_handle *mh, const char *path)
-{
- struct wrap_data* ioh;
-
- if(mh == NULL) return MPG123_ERR;
-
- ioh = mh->wrapperdata;
- /* Mimic the use of mpg123_replace_reader() functions by lower levels...
- IO_HANDLE is not valid here, though. Only IO_FD. */
- if(ioh != NULL && ioh->iotype == IO_FD)
- {
- int err;
- err = MPG123_LARGENAME(mpg123_replace_reader_handle)(mh, wrap_read, wrap_lseek, wrap_io_cleanup);
- if(err != MPG123_OK) return MPG123_ERR;
-
- /* The above call implied mpg123_close() already */
- /*
- I really need to open the file here... to be able to use the replacer handle I/O ...
- my_fd is used to indicate closing of the descriptor on cleanup.
- */
- ioh->my_fd = compat_open(path, O_RDONLY|O_BINARY);
- if(ioh->my_fd < 0)
- {
- if(!(mh->p.flags & MPG123_QUIET)) error2("Cannot open file %s: %s", path, strerror(errno));
-
- mh->err = MPG123_BAD_FILE;
- return MPG123_ERR;
- }
- /* Store a copy of the descriptor where it is actually used. */
- ioh->fd = ioh->my_fd;
- /* Initiate I/O operating on my handle now. */
- err = open_stream_handle(mh, ioh);
- if(err != MPG123_OK)
- {
- wrap_io_cleanup(ioh);
- return MPG123_ERR;
- }
- /* All fine... */
- return MPG123_OK;
- }
- else return MPG123_LARGENAME(mpg123_open)(mh, path);
-}
-
-/*
- This is in fact very similar to the above:
- The open routines always need to watch out for a prepared wrapper handle to use replaced normal I/O.
- Two cases to consider:
- 1. Plain normal open_fd using internal I/O.
- 2. Client called mpg123_replace_reader() before.
- The second case needs hackery to activate the client I/O callbacks. For that, we create a custom I/O handle and use the guts of mpg123_open_fd() on it.
-*/
-
-int attribute_align_arg mpg123_open_fd(mpg123_handle *mh, int fd)
-{
- struct wrap_data* ioh;
-
- if(mh == NULL) return MPG123_ERR;
-
- mpg123_close(mh);
- ioh = mh->wrapperdata;
- if(ioh != NULL && ioh->iotype == IO_FD)
- {
- int err;
- err = MPG123_LARGENAME(mpg123_replace_reader_handle)(mh, wrap_read, wrap_lseek, wrap_io_cleanup);
- if(err != MPG123_OK) return MPG123_ERR;
-
- /* The above call implied mpg123_close() already */
-
- /* Store the real file descriptor inside the handle. */
- ioh->fd = fd;
- /* Initiate I/O operating on my handle now. */
- err = open_stream_handle(mh, ioh);
- if(err != MPG123_OK)
- {
- wrap_io_cleanup(ioh);
- return MPG123_ERR;
- }
- /* All fine... */
- return MPG123_OK;
- }
- else return MPG123_LARGENAME(mpg123_open_fd)(mh, fd);
-}
-
-int attribute_align_arg mpg123_open_handle(mpg123_handle *mh, void *handle)
-{
- struct wrap_data* ioh;
-
- if(mh == NULL) return MPG123_ERR;
-
- mpg123_close(mh);
- ioh = mh->wrapperdata;
- if(ioh != NULL && ioh->iotype == IO_HANDLE && ioh->r_h_read != NULL)
- {
- /* Wrap the custom handle into my handle. */
- int err;
- err = MPG123_LARGENAME(mpg123_replace_reader_handle)(mh, wrap_read, wrap_lseek, wrap_io_cleanup);
- if(err != MPG123_OK) return MPG123_ERR;
-
- ioh->handle = handle;
- /* No extra error handling, keep behaviour of the original open_handle. */
- return open_stream_handle(mh, ioh);
- }
- else
- {
- /* This is an error ... you need to prepare the I/O before using it. */
- mh->err = MPG123_BAD_CUSTOM_IO;
- return MPG123_ERR;
- }
-}
-
projects / reactos.git / blobdiff