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add an EOF callback to the mix

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This commit is contained in:
Josh Coalson
2004-07-11 06:32:09 +00:00
parent 91748beb86
commit eaf8fbd8b7
1 changed files with 17 additions and 4 deletions
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21
include/FLAC/callback.h
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@@ -68,15 +68,16 @@
* opaque structure for a data source. * opaque structure for a data source.
* *
* The callback function prototypes are similar (but not identical) to the * The callback function prototypes are similar (but not identical) to the
* stdio functions fread, fwrite, fseek, ftell, and fclose. If you use stdio * stdio functions fread, fwrite, fseek, ftell, feof, and fclose. If you use
* streams to implement the callbacks, you can pass fread, fwrite, and fclose * stdio streams to implement the callbacks, you can pass fread, fwrite, and
* anywhere a FLAC__IOCallback_Read, FLAC__IOCallback_Write, or * fclose anywhere a FLAC__IOCallback_Read, FLAC__IOCallback_Write, or
* FLAC__IOCallback_Close is required, and a FILE* anywhere a FLAC__IOHandle * FLAC__IOCallback_Close is required, and a FILE* anywhere a FLAC__IOHandle
* is required. \warning You generally can NOT directly use fseek or ftell * is required. \warning You generally can NOT directly use fseek or ftell
* for FLAC__IOCallback_Seek or FLAC__IOCallback_Tell since on most systems * for FLAC__IOCallback_Seek or FLAC__IOCallback_Tell since on most systems
* these use 32-bit offsets and FLAC requires 64-bit offsets to deal with * these use 32-bit offsets and FLAC requires 64-bit offsets to deal with
* large files. You will have to find an equivalent function (e.g. ftello), * large files. You will have to find an equivalent function (e.g. ftello),
* or write a wrapper. * or write a wrapper. The same is true for feof() since this is usually
* implemented as a macro, not as a function whose address can be taken.
*/ */
#ifdef __cplusplus #ifdef __cplusplus
@@ -135,6 +136,17 @@ typedef int (*FLAC__IOCallback_Seek) (FLAC__IOHandle handle, FLAC__int64 offset,
*/ */
typedef FLAC__int64 (*FLAC__IOCallback_Tell) (FLAC__IOHandle handle); typedef FLAC__int64 (*FLAC__IOCallback_Tell) (FLAC__IOHandle handle);
/** Signature for the EOF callback.
* The signature and semantics mostly match POSIX feof() but WATCHOUT:
* on many systems, feof() is a macro, so in this case a wrapper function
* must be provided instead.
*
* \param handle The handle to the data source.
* \retval int
* \c 0 if not at end of file, nonzero if at end of file.
*/
typedef int (*FLAC__IOCallback_Eof) (FLAC__IOHandle handle);
/** Signature for the close callback. /** Signature for the close callback.
* The signature and semantics match POSIX fclose() implementations * The signature and semantics match POSIX fclose() implementations
* and can generally be used interchangeably. * and can generally be used interchangeably.
@@ -158,6 +170,7 @@ typedef struct {
FLAC__IOCallback_Write write; FLAC__IOCallback_Write write;
FLAC__IOCallback_Seek seek; FLAC__IOCallback_Seek seek;
FLAC__IOCallback_Tell tell; FLAC__IOCallback_Tell tell;
FLAC__IOCallback_Eof eof;
FLAC__IOCallback_Close close; FLAC__IOCallback_Close close;
} FLAC__IOCallbacks; } FLAC__IOCallbacks;