diff options
| -rw-r--r-- | common/filetype.c | 36 | ||||
| -rw-r--r-- | include/filetype.h | 1 |
2 files changed, 25 insertions, 12 deletions
diff --git a/common/filetype.c b/common/filetype.c index 8652f1d7af..1ff3dd202a 100644 --- a/common/filetype.c +++ b/common/filetype.c @@ -151,6 +151,28 @@ enum filetype is_fat_or_mbr(const unsigned char *sector, unsigned long *bootsec) return filetype_mbr; } +enum filetype file_detect_partition_table(const void *_buf, size_t bufsize) +{ + const u8 *buf8 = _buf; + enum filetype type; + + if (bufsize < 512) + return filetype_unknown; + + /* + * EFI GPT need to be detected before MBR otherwise + * we will detect a MBR + */ + if (bufsize >= 520 && is_gpt_valid(buf8)) + return filetype_gpt; + + type = is_fat_or_mbr(buf8, NULL); + if (type != filetype_unknown) + return type; + + return filetype_unknown; +} + enum filetype file_detect_type(const void *_buf, size_t bufsize) { const u32 *buf = _buf; @@ -204,21 +226,11 @@ enum filetype file_detect_type(const void *_buf, size_t bufsize) if (bufsize < 512) return filetype_unknown; - /* - * EFI GPT need to be detected before MBR otherwise - * we will detect a MBR - */ - if (bufsize >= 520 && is_gpt_valid(buf8)) - return filetype_gpt; - - type = is_fat_or_mbr(buf8, NULL); + type = file_detect_partition_table(_buf, bufsize); if (type != filetype_unknown) return type; - if (bufsize < 1536) - return filetype_unknown; - - if (buf16[512 + 28] == le16_to_cpu(0xef53)) + if (bufsize >= 1536 && buf16[512 + 28] == le16_to_cpu(0xef53)) return filetype_ext; return filetype_unknown; diff --git a/include/filetype.h b/include/filetype.h index 78ca5d2043..ee777acf99 100644 --- a/include/filetype.h +++ b/include/filetype.h @@ -31,6 +31,7 @@ enum filetype { const char *file_type_to_string(enum filetype f); const char *file_type_to_short_string(enum filetype f); +enum filetype file_detect_partition_table(const void *_buf, size_t bufsize); enum filetype file_detect_type(const void *_buf, size_t bufsize); enum filetype file_name_detect_type(const char *filename); enum filetype is_fat_or_mbr(const unsigned char *sector, unsigned long *bootsec); |