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Add mmap() backend to zlib extract.
This commit is contained in:
Themaister
parent
8b58c39cad
commit
299ef54a54
168
file_extract.c
168
file_extract.c
@ -28,6 +28,149 @@
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#include "hash.h"
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// File backends. Can be fleshed out later, but keep it simple for now.
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// The file is mapped to memory directly (via mmap() or just plain read_file()).
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struct zlib_file_backend
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{
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void *(*open)(const char *path);
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const uint8_t *(*data)(void *handle);
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size_t (*size)(void *handle);
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void (*free)(void *handle); // Closes, unmaps and frees.
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};
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#ifdef HAVE_MMAP
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <unistd.h>
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typedef struct
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{
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int fd;
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void *data;
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size_t size;
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} zlib_file_data_t;
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static void zlib_file_free(void *handle)
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{
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zlib_file_data_t *data = (zlib_file_data_t*)handle;
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if (data->data)
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munmap(data->data, data->size);
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if (data->fd >= 0)
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close(data->fd);
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free(data);
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}
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static const uint8_t *zlib_file_data(void *handle)
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{
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zlib_file_data_t *data = (zlib_file_data_t*)handle;
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return (const uint8_t*)data->data;
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}
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static size_t zlib_file_size(void *handle)
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{
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zlib_file_data_t *data = (zlib_file_data_t*)handle;
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return data->size;
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}
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static void *zlib_file_open(const char *path)
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{
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zlib_file_data_t *data = (zlib_file_data_t*)calloc(1, sizeof(*data));
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if (!data)
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return NULL;
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data->fd = open(path, O_RDONLY);
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if (data->fd < 0)
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{
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RARCH_ERR("Failed to open archive: %s (%s).\n",
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path, strerror(errno));
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goto error;
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}
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struct stat fds;
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if (fstat(data->fd, &fds) < 0)
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goto error;
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data->size = fds.st_size;
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if (!data->size)
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return data;
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data->data = mmap(NULL, data->size, PROT_READ, MAP_SHARED, data->fd, 0);
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if (data->data == MAP_FAILED)
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{
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data->data = NULL;
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RARCH_ERR("Failed to mmap() file: %s (%s).\n", path, strerror(errno));
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goto error;
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}
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return data;
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error:
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zlib_file_free(data);
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return NULL;
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}
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#else
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typedef struct
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{
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void *data;
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size_t size;
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} zlib_file_data_t;
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static void zlib_file_free(void *handle)
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{
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zlib_file_data_t *data = (zlib_file_data_t*)handle;
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if (!data)
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return;
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free(data->data);
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free(data);
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}
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static const uint8_t *zlib_file_data(void *handle)
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{
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zlib_file_data_t *data = (zlib_file_data_t*)handle;
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return (const uint8_t*)data->data;
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}
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static size_t zlib_file_size(void *handle)
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{
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zlib_file_data_t *data = (zlib_file_data_t*)handle;
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return data->size;
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}
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static void *zlib_file_open(const char *path)
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{
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zlib_file_data_t *data = (zlib_file_data_t*)calloc(1, sizeof(*data));
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if (!data)
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return NULL;
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ssize_t ret = read_file(path, &data->data);
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if (ret < 0)
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{
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RARCH_ERR("Failed to open archive: %s.\n",
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path);
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goto error;
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}
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data->size = ret;
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return data;
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error:
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zlib_file_free(data);
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return NULL;
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}
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#endif
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static const struct zlib_file_backend zlib_backend = {
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zlib_file_open,
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zlib_file_data,
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zlib_file_size,
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zlib_file_free,
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};
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const struct zlib_file_backend *zlib_get_default_file_backend(void)
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{
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return &zlib_backend;
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}
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// Modified from nall::unzip (higan).
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#undef GOTO_END_ERROR
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@ -47,7 +190,7 @@ static uint32_t read_le(const uint8_t *data, unsigned size)
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return val;
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}
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static bool inflate_data_to_file(const char *path, const uint8_t *cdata,
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bool zlib_inflate_data_to_file(const char *path, const uint8_t *cdata,
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uint32_t csize, uint32_t size, uint32_t crc32)
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{
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bool ret = true;
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@ -92,11 +235,23 @@ bool zlib_parse_file(const char *file, zlib_file_cb file_cb, void *userdata)
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const uint8_t *directory = NULL;
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bool ret = true;
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uint8_t *data = NULL;
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ssize_t zip_size = read_file(file, (void**)&data);
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const uint8_t *data = NULL;
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const struct zlib_file_backend *backend = zlib_get_default_file_backend();
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if (!backend)
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return NULL;
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ssize_t zip_size = 0;
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void *handle = backend->open(file);
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if (!handle)
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GOTO_END_ERROR();
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zip_size = backend->size(handle);
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if (zip_size < 22)
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GOTO_END_ERROR();
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data = backend->data(handle);
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footer = data + zip_size - 22;
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for (;; footer--)
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{
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@ -137,7 +292,7 @@ bool zlib_parse_file(const char *file, zlib_file_cb file_cb, void *userdata)
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unsigned offsetNL = read_le(data + offset + 26, 2);
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unsigned offsetEL = read_le(data + offset + 28, 2);
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uint8_t *cdata = data + offset + 30 + offsetNL + offsetEL;
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const uint8_t *cdata = data + offset + 30 + offsetNL + offsetEL;
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RARCH_LOG("OFFSET: %u, CSIZE: %u, SIZE: %u.\n", offset + 30 + offsetNL + offsetEL, csize, size);
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@ -148,7 +303,8 @@ bool zlib_parse_file(const char *file, zlib_file_cb file_cb, void *userdata)
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}
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end:
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free(data);
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if (handle)
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backend->free(handle);
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return ret;
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}
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@ -180,7 +336,7 @@ static bool zip_extract_cb(const char *name, const uint8_t *cdata, unsigned cmod
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return false;
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case 8: // Deflate
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if (inflate_data_to_file(new_path, cdata, csize, size, crc32))
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if (zlib_inflate_data_to_file(new_path, cdata, csize, size, crc32))
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{
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strlcpy(data->zip_path, new_path, data->zip_path_size);
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data->found_rom = true;
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@ -33,5 +33,8 @@ bool zlib_parse_file(const char *file, zlib_file_cb file_cb, void *userdata);
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bool zlib_extract_first_rom(char *zip_path, size_t zip_path_size, const char *valid_exts);
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struct string_list *zlib_get_file_list(const char *path);
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bool zlib_inflate_data_to_file(const char *path, const uint8_t *data,
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uint32_t csize, uint32_t size, uint32_t crc32);
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#endif
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@ -248,6 +248,7 @@ fi
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check_pkgconf UDEV libudev
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check_lib STRL -lc strlcpy
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check_lib MMAP -lc mmap
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check_pkgconf PYTHON python3
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@ -257,6 +258,6 @@ add_define_make OS "$OS"
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# Creates config.mk and config.h.
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add_define_make GLOBAL_CONFIG_DIR "$GLOBAL_CONFIG_DIR"
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VARS="RGUI ALSA OSS OSS_BSD OSS_LIB AL RSOUND ROAR JACK COREAUDIO PULSE SDL OPENGL GLES VG EGL KMS GBM DRM DYLIB GETOPT_LONG THREADS CG LIBXML2 SDL_IMAGE ZLIB DYNAMIC FFMPEG AVCODEC AVFORMAT AVUTIL SWSCALE FREETYPE XVIDEO X11 XEXT XF86VM XINERAMA NETPLAY NETWORK_CMD STDIN_CMD COMMAND SOCKET_LEGACY FBO STRL PYTHON FFMPEG_ALLOC_CONTEXT3 FFMPEG_AVCODEC_OPEN2 FFMPEG_AVIO_OPEN FFMPEG_AVFORMAT_WRITE_HEADER FFMPEG_AVFORMAT_NEW_STREAM FFMPEG_AVCODEC_ENCODE_AUDIO2 FFMPEG_AVCODEC_ENCODE_VIDEO2 BSV_MOVIE VIDEOCORE NEON FLOATHARD FLOATSOFTFP UDEV"
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VARS="RGUI ALSA OSS OSS_BSD OSS_LIB AL RSOUND ROAR JACK COREAUDIO PULSE SDL OPENGL GLES VG EGL KMS GBM DRM DYLIB GETOPT_LONG THREADS CG LIBXML2 SDL_IMAGE ZLIB DYNAMIC FFMPEG AVCODEC AVFORMAT AVUTIL SWSCALE FREETYPE XVIDEO X11 XEXT XF86VM XINERAMA NETPLAY NETWORK_CMD STDIN_CMD COMMAND SOCKET_LEGACY FBO STRL MMAP PYTHON FFMPEG_ALLOC_CONTEXT3 FFMPEG_AVCODEC_OPEN2 FFMPEG_AVIO_OPEN FFMPEG_AVFORMAT_WRITE_HEADER FFMPEG_AVFORMAT_NEW_STREAM FFMPEG_AVCODEC_ENCODE_AUDIO2 FFMPEG_AVCODEC_ENCODE_VIDEO2 BSV_MOVIE VIDEOCORE NEON FLOATHARD FLOATSOFTFP UDEV"
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create_config_make config.mk $VARS
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create_config_header config.h $VARS
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