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(libretro-common) Cleanups:

Browse Source 
* Work more with return values, prevent unnecessary local stack variables
when possible
* Reduce lines of code
* Move local stack variables to proper scope
This commit is contained in:
libretroadmin 2022-07-10 19:06:18 +02:00
parent 0e85113eb3
commit 9e430cd8b9
4 changed files with 73 additions and 144 deletions
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3
libretro-common/dynamic/dylib.c
View File

@ -174,7 +174,8 @@ function_t dylib_proc(dylib_t lib, const char *proc)
void *ptr_sym = NULL;
sym = NULL;
if (lib) {
if (lib)
{
sceKernelDlsym((SceKernelModule)lib, proc, &ptr_sym);
memcpy(&sym, &ptr_sym, sizeof(void*));
}

50
libretro-common/streams/file_stream.c
View File

@ -109,18 +109,14 @@ bool filestream_exists(const char *path)
if (!path || !*path)
return false;
dummy = filestream_open(
if (!(dummy = filestream_open(
path,
RETRO_VFS_FILE_ACCESS_READ,
RETRO_VFS_FILE_ACCESS_HINT_NONE);
if (!dummy)
RETRO_VFS_FILE_ACCESS_HINT_NONE)))
return false;
if (filestream_close(dummy) != 0)
if (dummy)
free(dummy);
free(dummy);
dummy = NULL;
return true;
@ -226,9 +222,9 @@ int filestream_vscanf(RFILE *stream, const char* format, va_list *args)
char buf[4096];
char subfmt[64];
va_list args_copy;
const char * bufiter = buf;
const char *bufiter = buf;
int ret = 0;
int64_t startpos = filestream_tell(stream);
int64_t startpos = 0;
int64_t maxlen = filestream_read(stream, buf, sizeof(buf)-1);
if (maxlen <= 0)
@ -337,7 +333,8 @@ int filestream_vscanf(RFILE *stream, const char* format, va_list *args)
}
va_end(args_copy);
filestream_seek(stream, startpos+(bufiter-buf),
startpos = filestream_tell(stream);
filestream_seek(stream, startpos + (bufiter - buf),
RETRO_VFS_SEEK_POSITION_START);
return ret;
@ -513,9 +510,7 @@ int filestream_printf(RFILE *stream, const char* format, ...)
int filestream_error(RFILE *stream)
{
if (stream && stream->error_flag)
return 1;
return 0;
return (stream && stream->error_flag);
}
int filestream_close(RFILE *stream)
@ -566,20 +561,17 @@ int64_t filestream_read_file(const char *path, void **buf, int64_t *len)
if (content_buf_size < 0)
goto error;
content_buf = malloc((size_t)(content_buf_size + 1));
if (!content_buf)
if (!(content_buf = malloc((size_t)(content_buf_size + 1))))
goto error;
if ((int64_t)(uint64_t)(content_buf_size + 1) != (content_buf_size + 1))
goto error;
ret = filestream_read(file, content_buf, (int64_t)content_buf_size);
if (ret < 0)
if ((ret = filestream_read(file, content_buf, (int64_t)content_buf_size)) <
0)
goto error;
if (filestream_close(file) != 0)
if (file)
free(file);
free(file);
*buf = content_buf;
@ -593,9 +585,8 @@ int64_t filestream_read_file(const char *path, void **buf, int64_t *len)
return 1;
error:
if (file)
if (filestream_close(file) != 0)
free(file);
if (filestream_close(file) != 0)
free(file);
if (content_buf)
free(content_buf);
if (len)
@ -622,16 +613,10 @@ bool filestream_write_file(const char *path, const void *data, int64_t size)
RETRO_VFS_FILE_ACCESS_HINT_NONE);
if (!file)
return false;
ret = filestream_write(file, data, size);
if (filestream_close(file) != 0)
if (file)
free(file);
if (ret != size)
return false;
return true;
free(file);
return (ret == size);
}
/* Returned pointer must be freed by the caller. */
@ -657,9 +642,8 @@ char* filestream_getline(RFILE *stream)
if (idx == cur_size)
{
cur_size *= 2;
newline_tmp = (char*)realloc(newline, cur_size + 1);
if (!newline_tmp)
if (!(newline_tmp = (char*)realloc(newline, cur_size + 1)))
{
free(newline);
return NULL;

161
libretro-common/streams/rzip_stream.c
View File

@ -88,18 +88,17 @@ static bool rzipstream_read_file_header(rzipstream_t *stream)
header_bytes[i] = 0;
/* Attempt to read header bytes */
length = filestream_read(stream->file, header_bytes, sizeof(header_bytes));
if (length <= 0)
if ((length = filestream_read(stream->file, header_bytes, sizeof(header_bytes))) <= 0)
return false;
/* If file length is less than header size
* then assume this is uncompressed data */
if (length < RZIP_HEADER_SIZE)
goto file_uncompressed;
/* Check 'magic numbers' - first 8 bytes
* of header */
if ((header_bytes[0] != 35) || /* # */
if (
(length < RZIP_HEADER_SIZE) ||
(header_bytes[0] != 35) || /* # */
(header_bytes[1] != 82) || /* R */
(header_bytes[2] != 90) || /* Z */
(header_bytes[3] != 73) || /* I */
@ -107,41 +106,35 @@ static bool rzipstream_read_file_header(rzipstream_t *stream)
(header_bytes[5] != 118) || /* v */
(header_bytes[6] != RZIP_VERSION) || /* file format version number */
(header_bytes[7] != 35)) /* # */
goto file_uncompressed;
{
/* Reset file to start */
filestream_seek(stream->file, 0, SEEK_SET);
/* Get 'raw' file size */
stream->size = filestream_get_size(stream->file);
stream->is_compressed = false;
return true;
}
/* Get uncompressed chunk size - next 4 bytes */
stream->chunk_size = ((uint32_t)header_bytes[11] << 24) |
if ((stream->chunk_size = ((uint32_t)header_bytes[11] << 24) |
((uint32_t)header_bytes[10] << 16) |
((uint32_t)header_bytes[9] << 8) |
(uint32_t)header_bytes[8];
if (stream->chunk_size == 0)
(uint32_t)header_bytes[8]) == 0)
return false;
/* Get total uncompressed data size - next 8 bytes */
stream->size = ((uint64_t)header_bytes[19] << 56) |
if ((stream->size = ((uint64_t)header_bytes[19] << 56) |
((uint64_t)header_bytes[18] << 48) |
((uint64_t)header_bytes[17] << 40) |
((uint64_t)header_bytes[16] << 32) |
((uint64_t)header_bytes[15] << 24) |
((uint64_t)header_bytes[14] << 16) |
((uint64_t)header_bytes[13] << 8) |
(uint64_t)header_bytes[12];
if (stream->size == 0)
(uint64_t)header_bytes[12]) == 0)
return false;
stream->is_compressed = true;
return true;
file_uncompressed:
/* Reset file to start */
filestream_seek(stream->file, 0, SEEK_SET);
/* Get 'raw' file size */
stream->size = filestream_get_size(stream->file);
stream->is_compressed = false;
return true;
}
/* Writes header information to RZIP file
@ -150,7 +143,6 @@ file_uncompressed:
static bool rzipstream_write_file_header(rzipstream_t *stream)
{
unsigned i;
int64_t length;
uint8_t header_bytes[RZIP_HEADER_SIZE];
if (!stream)
@ -190,12 +182,8 @@ static bool rzipstream_write_file_header(rzipstream_t *stream)
filestream_seek(stream->file, 0, SEEK_SET);
/* Write header bytes */
length = filestream_write(stream->file,
header_bytes, sizeof(header_bytes));
if (length != RZIP_HEADER_SIZE)
return false;
return true;
return (filestream_write(stream->file,
header_bytes, sizeof(header_bytes)) == RZIP_HEADER_SIZE);
}
/* Stream Initialisation/De-initialisation */
@ -240,9 +228,8 @@ static bool rzipstream_init_stream(
file_mode = RETRO_VFS_FILE_ACCESS_READ;
/* Open file */
stream->file = filestream_open(
path, file_mode, RETRO_VFS_FILE_ACCESS_HINT_NONE);
if (!stream->file)
if (!(stream->file = filestream_open(
path, file_mode, RETRO_VFS_FILE_ACCESS_HINT_NONE)))
return false;
/* If file is open for writing, output header
@ -266,12 +253,10 @@ static bool rzipstream_init_stream(
if (stream->is_writing)
{
/* Compression */
stream->deflate_backend = trans_stream_get_zlib_deflate_backend();
if (!stream->deflate_backend)
if (!(stream->deflate_backend = trans_stream_get_zlib_deflate_backend()))
return false;
stream->deflate_stream = stream->deflate_backend->stream_new();
if (!stream->deflate_stream)
if (!(stream->deflate_stream = stream->deflate_backend->stream_new()))
return false;
/* Set compression level */
@ -292,8 +277,8 @@ static bool rzipstream_init_stream(
stream->out_buf_size;
/* Redundant safety check */
if ((stream->in_buf_size == 0) ||
(stream->out_buf_size == 0))
if ( (stream->in_buf_size == 0)
|| (stream->out_buf_size == 0))
return false;
}
/* When reading, don't need an inflate transform
@ -301,12 +286,10 @@ static bool rzipstream_init_stream(
else if (stream->is_compressed)
{
/* Decompression */
stream->inflate_backend = trans_stream_get_zlib_inflate_backend();
if (!stream->inflate_backend)
if (!(stream->inflate_backend = trans_stream_get_zlib_inflate_backend()))
return false;
stream->inflate_stream = stream->inflate_backend->stream_new();
if (!stream->inflate_stream)
if (!(stream->inflate_stream = stream->inflate_backend->stream_new()))
return false;
/* Buffers
@ -323,23 +306,21 @@ static bool rzipstream_init_stream(
stream->out_buf_size = stream->chunk_size + (stream->chunk_size >> 2);
/* Redundant safety check */
if ((stream->in_buf_size == 0) ||
(stream->out_buf_size == 0))
if ( (stream->in_buf_size == 0)
|| (stream->out_buf_size == 0))
return false;
}
/* Allocate buffers */
if (stream->in_buf_size > 0)
{
stream->in_buf = (uint8_t *)calloc(stream->in_buf_size, 1);
if (!stream->in_buf)
if (!(stream->in_buf = (uint8_t *)calloc(stream->in_buf_size, 1)))
return false;
}
if (stream->out_buf_size > 0)
{
stream->out_buf = (uint8_t *)calloc(stream->out_buf_size, 1);
if (!stream->out_buf)
if (!(stream->out_buf = (uint8_t *)calloc(stream->out_buf_size, 1)))
return false;
}
@ -415,8 +396,7 @@ rzipstream_t* rzipstream_open(const char *path, unsigned mode)
return NULL;
/* Allocate stream object */
stream = (rzipstream_t*)malloc(sizeof(*stream));
if (!stream)
if (!(stream = (rzipstream_t*)malloc(sizeof(*stream))))
return NULL;
stream->is_compressed = false;
@ -456,7 +436,6 @@ rzipstream_t* rzipstream_open(const char *path, unsigned mode)
static bool rzipstream_read_chunk(rzipstream_t *stream)
{
unsigned i;
int64_t length;
uint8_t chunk_header_bytes[RZIP_CHUNK_HEADER_SIZE];
uint32_t compressed_chunk_size;
uint32_t inflate_read;
@ -469,9 +448,9 @@ static bool rzipstream_read_chunk(rzipstream_t *stream)
chunk_header_bytes[i] = 0;
/* Attempt to read chunk header bytes */
length = filestream_read(
stream->file, chunk_header_bytes, sizeof(chunk_header_bytes));
if (length != RZIP_CHUNK_HEADER_SIZE)
if (filestream_read(
stream->file, chunk_header_bytes, sizeof(chunk_header_bytes)) !=
RZIP_CHUNK_HEADER_SIZE)
return false;
/* Get size of next compressed chunk */
@ -500,9 +479,9 @@ static bool rzipstream_read_chunk(rzipstream_t *stream)
}
/* Read compressed chunk from file */
length = filestream_read(
stream->file, stream->in_buf, compressed_chunk_size);
if (length != compressed_chunk_size)
if (filestream_read(
stream->file, stream->in_buf, compressed_chunk_size) !=
compressed_chunk_size)
return false;
/* Decompress chunk data */
@ -576,8 +555,8 @@ int64_t rzipstream_read(rzipstream_t *stream, void *data, int64_t len)
/* Get amount of data to 'read out' this loop
* > i.e. minimum of remaining output buffer
* occupancy and remaining 'read data' size */
read_size = stream->out_buf_occupancy - stream->out_buf_ptr;
if (read_size > data_len)
if ((read_size = stream->out_buf_occupancy - stream->out_buf_ptr) >
data_len)
read_size = data_len;
/* Copy as much cached data as possible into
@ -675,33 +654,26 @@ bool rzipstream_read_file(const char *path, void **buf, int64_t *len)
return false;
/* Attempt to open file */
stream = rzipstream_open(path, RETRO_VFS_FILE_ACCESS_READ);
if (!stream)
if (!(stream = rzipstream_open(path, RETRO_VFS_FILE_ACCESS_READ)))
{
*buf = NULL;
return false;
}
/* Get file size */
content_buf_size = rzipstream_get_size(stream);
if (content_buf_size < 0)
if ((content_buf_size = rzipstream_get_size(stream)) < 0)
goto error;
if ((int64_t)(uint64_t)(content_buf_size + 1) != (content_buf_size + 1))
goto error;
/* Allocate buffer */
content_buf = malloc((size_t)(content_buf_size + 1));
if (!content_buf)
if (!(content_buf = malloc((size_t)(content_buf_size + 1))))
goto error;
/* Read file contents */
bytes_read = rzipstream_read(stream, content_buf, content_buf_size);
if (bytes_read < 0)
if ((bytes_read = rzipstream_read(stream, content_buf, content_buf_size)) <
0)
goto error;
/* Close file */
@ -722,7 +694,6 @@ bool rzipstream_read_file(const char *path, void **buf, int64_t *len)
return true;
error:
if (stream)
rzipstream_close(stream);
stream = NULL;
@ -789,16 +760,14 @@ static bool rzipstream_write_chunk(rzipstream_t *stream)
chunk_header_bytes[1] = (deflate_written >> 8) & 0xFF;
chunk_header_bytes[0] = deflate_written & 0xFF;
length = filestream_write(
stream->file, chunk_header_bytes, sizeof(chunk_header_bytes));
if (length != RZIP_CHUNK_HEADER_SIZE)
if ((length = filestream_write(
stream->file, chunk_header_bytes, sizeof(chunk_header_bytes))) !=
RZIP_CHUNK_HEADER_SIZE)
return false;
/* Write compressed data to file */
length = filestream_write(
stream->file, stream->out_buf, deflate_written);
if (length != deflate_written)
if ((length = filestream_write(
stream->file, stream->out_buf, deflate_written)) != deflate_written)
return false;
/* Reset input buffer pointer */
@ -831,8 +800,7 @@ int64_t rzipstream_write(rzipstream_t *stream, const void *data, int64_t len)
/* Get amount of data to cache during this loop
* > i.e. minimum of space remaining in input buffer
* and remaining 'write data' size */
cache_size = stream->in_buf_size - stream->in_buf_ptr;
if (cache_size > data_len)
if ((cache_size = stream->in_buf_size - stream->in_buf_ptr) > data_len)
cache_size = data_len;
/* Copy as much data as possible into
@ -919,9 +887,7 @@ bool rzipstream_write_file(const char *path, const void *data, int64_t len)
return false;
/* Attempt to open file */
stream = rzipstream_open(path, RETRO_VFS_FILE_ACCESS_WRITE);
if (!stream)
if (!(stream = rzipstream_open(path, RETRO_VFS_FILE_ACCESS_WRITE)))
return false;
/* Write contents of data buffer to file */
@ -933,10 +899,7 @@ bool rzipstream_write_file(const char *path, const void *data, int64_t len)
/* Check that the correct number of bytes
* were written */
if (bytes_written != len)
return false;
return true;
return (bytes_written == len);
}
/* File Control */
@ -977,12 +940,7 @@ void rzipstream_rewind(rzipstream_t *stream)
/* Reset file position to first chunk location */
filestream_seek(stream->file, RZIP_HEADER_SIZE, SEEK_SET);
if (filestream_error(stream->file))
{
fprintf(
stderr,
"rzipstream_rewind(): Failed to reset file position...\n");
return;
}
/* Reset pointers */
stream->virtual_ptr = 0;
@ -1011,21 +969,11 @@ void rzipstream_rewind(rzipstream_t *stream)
/* Reset file position to first chunk location */
filestream_seek(stream->file, RZIP_HEADER_SIZE, SEEK_SET);
if (filestream_error(stream->file))
{
fprintf(
stderr,
"rzipstream_rewind(): Failed to reset file position...\n");
return;
}
/* Read chunk */
if (!rzipstream_read_chunk(stream))
{
fprintf(
stderr,
"rzipstream_rewind(): Failed to read first chunk of file...\n");
return;
}
/* Reset pointers */
stream->virtual_ptr = 0;
@ -1079,10 +1027,7 @@ int64_t rzipstream_tell(rzipstream_t *stream)
* compressed content */
bool rzipstream_is_compressed(rzipstream_t *stream)
{
if (!stream)
return false;
return stream->is_compressed;
return stream && stream->is_compressed;
}
/* File Close */

3
libretro-common/streams/trans_stream.c
View File

@ -48,8 +48,7 @@ bool trans_stream_trans_full(
rdata = *data;
else
{
rdata = backend->stream_new();
if (!rdata)
if (!(rdata = backend->stream_new()))
{
if (error)
*error = TRANS_STREAM_ERROR_ALLOCATION_FAILURE;