flipperzero-firmware/lib/update_util/resources/manifest.c

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#include "manifest.h"
#include <toolbox/stream/buffered_file_stream.h>
#include <toolbox/hex.h>
struct ResourceManifestReader {
Storage* storage;
Stream* stream;
string_t linebuf;
ResourceManifestEntry entry;
};
ResourceManifestReader* resource_manifest_reader_alloc(Storage* storage) {
ResourceManifestReader* resource_manifest =
(ResourceManifestReader*)malloc(sizeof(ResourceManifestReader));
resource_manifest->storage = storage;
resource_manifest->stream = buffered_file_stream_alloc(resource_manifest->storage);
memset(&resource_manifest->entry, 0, sizeof(ResourceManifestEntry));
string_init(resource_manifest->entry.name);
string_init(resource_manifest->linebuf);
return resource_manifest;
}
void resource_manifest_reader_free(ResourceManifestReader* resource_manifest) {
furi_assert(resource_manifest);
string_clear(resource_manifest->linebuf);
string_clear(resource_manifest->entry.name);
buffered_file_stream_close(resource_manifest->stream);
stream_free(resource_manifest->stream);
free(resource_manifest);
}
bool resource_manifest_reader_open(ResourceManifestReader* resource_manifest, const char* filename) {
furi_assert(resource_manifest);
return buffered_file_stream_open(
resource_manifest->stream, filename, FSAM_READ, FSOM_OPEN_EXISTING);
}
/* Read entries in format of
* F:<hash>:<size>:<name>
* D:<name>
*/
ResourceManifestEntry* resource_manifest_reader_next(ResourceManifestReader* resource_manifest) {
furi_assert(resource_manifest);
string_reset(resource_manifest->entry.name);
resource_manifest->entry.type = ResourceManifestEntryTypeUnknown;
resource_manifest->entry.size = 0;
memset(resource_manifest->entry.hash, 0, sizeof(resource_manifest->entry.hash));
do {
if(!stream_read_line(resource_manifest->stream, resource_manifest->linebuf)) {
return NULL;
}
/* Trim end of line */
string_strim(resource_manifest->linebuf);
char type_code = string_get_char(resource_manifest->linebuf, 0);
switch(type_code) {
case 'F':
resource_manifest->entry.type = ResourceManifestEntryTypeFile;
break;
case 'D':
resource_manifest->entry.type = ResourceManifestEntryTypeDirectory;
break;
default: /* Skip other entries - version, timestamp, etc */
continue;
};
if(resource_manifest->entry.type == ResourceManifestEntryTypeFile) {
/* Parse file entry
F:<hash>:<size>:<name> */
/* Remove entry type code */
string_right(resource_manifest->linebuf, 2);
if(string_search_char(resource_manifest->linebuf, ':') !=
sizeof(resource_manifest->entry.hash) * 2) {
/* Invalid hash */
continue;
}
/* Read hash */
hex_chars_to_uint8(
string_get_cstr(resource_manifest->linebuf), resource_manifest->entry.hash);
/* Remove hash */
string_right(
resource_manifest->linebuf, sizeof(resource_manifest->entry.hash) * 2 + 1);
resource_manifest->entry.size = atoi(string_get_cstr(resource_manifest->linebuf));
/* Remove size */
size_t offs = string_search_char(resource_manifest->linebuf, ':');
string_right(resource_manifest->linebuf, offs + 1);
string_set(resource_manifest->entry.name, resource_manifest->linebuf);
} else if(resource_manifest->entry.type == ResourceManifestEntryTypeDirectory) {
/* Parse directory entry
D:<name> */
/* Remove entry type code */
string_right(resource_manifest->linebuf, 2);
string_set(resource_manifest->entry.name, resource_manifest->linebuf);
}
return &resource_manifest->entry;
} while(true);
return NULL;
}