106 lines
2.5 KiB
C++
106 lines
2.5 KiB
C++
#include <string.h>
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#include "format.hpp"
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std::map<std::string_view, format_t> name2fmt;
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Fmt2Name fmt2name;
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Fmt2Ext fmt2ext;
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class FormatInit {
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public:
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FormatInit() {
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name2fmt["gzip"] = GZIP;
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name2fmt["xz"] = XZ;
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name2fmt["lzma"] = LZMA;
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name2fmt["bzip2"] = BZIP2;
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name2fmt["lz4"] = LZ4;
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name2fmt["lz4_legacy"] = LZ4_LEGACY;
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name2fmt["lz4_lg"] = LZ4_LG;
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}
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};
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static FormatInit init;
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#define MATCH(s) (len >= (sizeof(s) - 1) && memcmp(buf, s, sizeof(s) - 1) == 0)
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format_t check_fmt(const void *buf, size_t len) {
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if (MATCH(CHROMEOS_MAGIC)) {
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return CHROMEOS;
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} else if (MATCH(BOOT_MAGIC)) {
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return AOSP;
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} else if (MATCH(VENDOR_BOOT_MAGIC)) {
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return AOSP_VENDOR;
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} else if (MATCH(GZIP1_MAGIC) || MATCH(GZIP2_MAGIC)) {
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return GZIP;
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} else if (MATCH(LZOP_MAGIC)) {
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return LZOP;
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} else if (MATCH(XZ_MAGIC)) {
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return XZ;
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} else if (len >= 13 && memcmp(buf, "\x5d\x00\x00", 3) == 0
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&& (((char *)buf)[12] == '\xff' || ((char *)buf)[12] == '\x00')) {
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return LZMA;
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} else if (MATCH(BZIP_MAGIC)) {
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return BZIP2;
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} else if (MATCH(LZ41_MAGIC) || MATCH(LZ42_MAGIC)) {
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return LZ4;
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} else if (MATCH(LZ4_LEG_MAGIC)) {
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return LZ4_LEGACY;
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} else if (MATCH(MTK_MAGIC)) {
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return MTK;
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} else if (MATCH(DTB_MAGIC)) {
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return DTB;
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} else if (MATCH(DHTB_MAGIC)) {
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return DHTB;
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} else if (MATCH(TEGRABLOB_MAGIC)) {
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return BLOB;
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} else {
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return UNKNOWN;
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}
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}
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const char *Fmt2Name::operator[](format_t fmt) {
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switch (fmt) {
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case GZIP:
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return "gzip";
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case LZOP:
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return "lzop";
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case XZ:
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return "xz";
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case LZMA:
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return "lzma";
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case BZIP2:
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return "bzip2";
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case LZ4:
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return "lz4";
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case LZ4_LEGACY:
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return "lz4_legacy";
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case LZ4_LG:
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return "lz4_lg";
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case DTB:
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return "dtb";
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default:
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return "raw";
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}
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}
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const char *Fmt2Ext::operator[](format_t fmt) {
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switch (fmt) {
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case GZIP:
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return ".gz";
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case LZOP:
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return ".lzo";
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case XZ:
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return ".xz";
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case LZMA:
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return ".lzma";
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case BZIP2:
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return ".bz2";
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case LZ4:
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case LZ4_LEGACY:
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case LZ4_LG:
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return ".lz4";
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default:
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return "";
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}
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}
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