Add option to not use file I/O in libFLAC.

include/share/compat.h

@@ -49,6 +49,9 @@
 #if defined _MSC_VER || defined __BORLANDC__ || defined __MINGW32__
 #include <sys/types.h> /* for off_t */
 #define FLAC__off_t __int64 /* use this instead of off_t to fix the 2 GB limit */
+
+#ifndef FLAC__NO_FILEIO
+
 #if !defined __MINGW32__
 #define fseeko _fseeki64
 #define ftello _ftelli64
@@ -58,6 +61,9 @@
 #define ftello ftello64
 #endif
 #endif
+
+#endif // FLAC__NO_FILEIO
+
 #else
 #define FLAC__off_t off_t
 #endif
@@ -148,6 +154,8 @@
 #define flac_fprintf fprintf_utf8
 #define flac_vfprintf vfprintf_utf8
 
+#ifndef FLAC__NO_FILEIO
+
 #include "share/windows_unicode_filenames.h"
 #define flac_fopen flac_internal_fopen_utf8
 #define flac_chmod flac_internal_chmod_utf8
@@ -156,17 +164,21 @@
 #define flac_rename flac_internal_rename_utf8
 #define flac_stat flac_internal_stat64_utf8
 
+#endif
+
 #else
 
 #define flac_printf printf
 #define flac_fprintf fprintf
 #define flac_vfprintf vfprintf
 
+#ifndef FLAC__NO_FILEIO
 #define flac_fopen fopen
 #define flac_chmod chmod
 #define flac_unlink unlink
 #define flac_rename rename
 #define flac_stat stat
+#endif
 
 #if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 200809L)
 #define flac_utime(a, b) utimensat (AT_FDCWD, a, *b, 0)
@@ -175,6 +187,7 @@
 #endif
 #endif
 
+#ifndef FLAC__NO_FILEIO
 #ifdef _WIN32
 #define flac_stat_s __stat64 /* stat struct */
 #define flac_fstat _fstat64
@@ -182,6 +195,7 @@
 #define flac_stat_s stat /* stat struct */
 #define flac_fstat fstat
 #endif
+#endif
 
 #ifdef ANDROID
 #include <limits.h>

include/share/win_utf8_io.h

@@ -50,8 +50,10 @@ int printf_utf8(const char *format, ...);
 int fprintf_utf8(FILE *stream, const char *format, ...);
 int vfprintf_utf8(FILE *stream, const char *format, va_list argptr);
 
+#ifndef FLAC__NO_FILEIO
 #include <windows.h>
 HANDLE WINAPI CreateFile_utf8(const char *lpFileName, DWORD dwDesiredAccess, DWORD dwShareMode, LPSECURITY_ATTRIBUTES lpSecurityAttributes, DWORD dwCreationDisposition, DWORD dwFlagsAndAttributes, HANDLE hTemplateFile);
+#endif
 
 #ifdef __cplusplus
 } /* extern "C" */

src/libFLAC/metadata_iterators.c

@@ -34,6 +34,8 @@
 #  include <config.h>
 #endif
 
+#ifndef FLAC__NO_FILEIO
+
 #include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -3485,3 +3487,5 @@ FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorS
 			return FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
 	}
 }
+
+#endif // FLAC__NO_FILEIO

src/libFLAC/stream_decoder.c

@@ -106,11 +106,13 @@ static FLAC__bool seek_to_absolute_sample_(FLAC__StreamDecoder *decoder, FLAC__u
 #if FLAC__HAS_OGG
 static FLAC__bool seek_to_absolute_sample_ogg_(FLAC__StreamDecoder *decoder, FLAC__uint64 stream_length, FLAC__uint64 target_sample);
 #endif
+#ifndef FLAC__NO_FILEIO
 static FLAC__StreamDecoderReadStatus file_read_callback_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data);
 static FLAC__StreamDecoderSeekStatus file_seek_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 absolute_byte_offset, void *client_data);
 static FLAC__StreamDecoderTellStatus file_tell_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data);
 static FLAC__StreamDecoderLengthStatus file_length_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 *stream_length, void *client_data);
 static FLAC__bool file_eof_callback_(const FLAC__StreamDecoder *decoder, void *client_data);
+#endif
 
 /***********************************************************************
  *
@@ -500,6 +502,8 @@ FLAC_API FLAC__StreamDecoderInitStatus FLAC__stream_decoder_init_ogg_stream(
 	);
 }
 
+#ifndef FLAC__NO_FILEIO
+
 static FLAC__StreamDecoderInitStatus init_FILE_internal_(
 	FLAC__StreamDecoder *decoder,
 	FILE *file,
@@ -625,6 +629,8 @@ FLAC_API FLAC__StreamDecoderInitStatus FLAC__stream_decoder_init_ogg_file(
 	return init_file_internal_(decoder, filename, write_callback, metadata_callback, error_callback, client_data, /*is_ogg=*/true);
 }
 
+#endif
+
 FLAC_API FLAC__bool FLAC__stream_decoder_finish(FLAC__StreamDecoder *decoder)
 {
 	FLAC__bool md5_failed = false;
@@ -3345,7 +3351,6 @@ FLAC__bool seek_to_absolute_sample_ogg_(FLAC__StreamDecoder *decoder, FLAC__uint
 
 	return true;
 }
-#endif
 
 FLAC__StreamDecoderReadStatus file_read_callback_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
 {
@@ -3413,6 +3418,8 @@ FLAC__bool file_eof_callback_(const FLAC__StreamDecoder *decoder, void *client_d
 	return feof(decoder->private_->file)? true : false;
 }
 
+#endif // FLAC__NO_FILEIO
+
 FLAC_API const void *FLAC__get_decoder_client_data(FLAC__StreamDecoder *decoder)
 {
 	return decoder->private_->client_data;

src/libFLAC/stream_encoder.c

@@ -1415,6 +1415,8 @@ FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_ogg_FILE(
 	return init_FILE_internal_(encoder, file, progress_callback, client_data, /*is_ogg=*/true);
 }
 
+#ifndef FLAC__NO_FILEIO
+
 static FLAC__StreamEncoderInitStatus init_file_internal_(
 	FLAC__StreamEncoder *encoder,
 	const char *filename,
@@ -1465,6 +1467,8 @@ FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_ogg_file(
 	return init_file_internal_(encoder, filename, progress_callback, client_data, /*is_ogg=*/true);
 }
 
+#endif // FLAC__NO_FILEIO
+
 FLAC_API FLAC__bool FLAC__stream_encoder_finish(FLAC__StreamEncoder *encoder)
 {
 	FLAC__bool error = false;