diff options
Diffstat (limited to 'format.c')
| -rw-r--r-- | format.c | 188 |
1 files changed, 0 insertions, 188 deletions
diff --git a/format.c b/format.c deleted file mode 100644 index ec40eff..0000000 --- a/format.c +++ /dev/null @@ -1,188 +0,0 @@ -#include "format.h" -#include "gzip.h" - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <inttypes.h> - -struct segment empty_segment = { - .start = -1, - .end = -1, - .description = "No segment selected", -}; - -struct segment get_segment(void *mem, size_t len, ssize_t addr) { - - if (addr < 0 || addr >= len) { - return empty_segment; - } - - - static char *buf = NULL; - if (buf != NULL) { - free(buf); - buf = NULL; - } - struct member *header = (struct member*) mem; - - if (addr == 0) { - return (struct segment) { - .start = 0, - .end = 1, - .description = "ID1 = 31" - }; - } - if (addr == 1) { - return (struct segment) { - .start = 1, - .end = 2, - .description = "ID2 = 139", - }; - } - if (addr == 2) { - return (struct segment) { - .start = 2, - .end = 3, - .description = "CM (Compression Method)\n" - "CM = 8 is defalte", - }; - } - if (addr == 3) { - buf = malloc(1000); - buf[0] = '\0'; - for (int i = 0; i < 5; i++) { - if (header->flg & (1 << i)) { - strcat(buf, "- "); - strcat(buf, flag_str(1<<i)); - strcat(buf, "\n"); - } - } - return (struct segment) { - .start = 3, - .end = 4, - .description = buf, - }; - } - if (addr >= 4 && addr < 8) { - buf = malloc(1000); - sprintf(buf, "Mtime=%i", header->mtime); - return (struct segment) { - .start = 4, - .end = 8, - .description = buf, - }; - } - if (addr == 8) { - return (struct segment) { - .start = 8, - .end = 9, - .description = "XFL", - }; - } - if (addr == 9) { - buf = malloc(1000); - sprintf(buf, "OS: %s\n", os_str(header->os)); - return (struct segment) { - .start = 9, - .end = 10, - .description = buf, - }; - } - - void *ptr = ((struct member*) mem) + 1; - - if (header->flg & FEXTRA) { - uint16_t xlen = *((uint16_t*) ptr); - if (mem + addr == ptr || mem + addr == ptr + 1) { - return (struct segment) { - .start = ptr - mem, - .end = ptr - mem + 1, - .description = "XLEN", - }; - } - ptr = ((uint16_t*) ptr) + 1; - // if (mem + addr >= ptr && mem + addr < xlen) { - if (ptr - mem + addr < 2) { - return (struct segment) { - .start = ptr - mem, - .end = ptr - mem + xlen, - .description = "XLEN bytes of extra data", - }; - } - ptr = ((uint8_t*) ptr) + 1 + xlen; - } - - if (header->flg & FNAME) { - void *c = memchr(ptr, '\0', (ptr - mem) + len); - size_t start = ptr - mem; - size_t end = c - mem; - ptr = ((uint8_t*) c) + 1; - if (addr < c - mem + 1) { - return (struct segment) { - .start = start, - .end = end + 1, - .description = "Original filename", - }; - } - } - - if (header->flg & FCOMMENT) { - void *c = memchr(ptr, '\0', (ptr - mem) + len); - ptr = ((uint8_t*) c) + 1; - if (addr < c - mem + 1) { - size_t start = ptr - mem; - size_t end = c - mem; - return (struct segment) { - .start = start, - .end = end + 1, - .description = "File comment", - }; - } - } - - if (header->flg & FHCRC) { - if (addr < ptr - mem + 2) { - buf = malloc(1000); - sprintf(buf, "CRC16=%" PRIu16, *((uint16_t*) ptr)); - return (struct segment) { - .start = ptr - mem, - .end = ptr - mem + 2, - .description = buf, - }; - } - ptr = (uint16_t*) ptr + 1; - } - - if (len - addr < 4) { - buf = malloc(1000); - sprintf(buf, "ISIZE=%" PRIu32, *(((uint32_t*) ((uint8_t*) (mem + len))) - 1)); - return (struct segment) { - .start = len - 4, - .end = len, - .description = buf, - }; - } - - if (len - addr - 4 < 4) { - buf = malloc(1000); - sprintf(buf, "CRC32=%" PRIu32, *(((uint32_t*) ((uint8_t*) (mem + len))) - 2)); - return (struct segment) { - .start = len - 8, - .end = len - 4, - .description = buf, - }; - } - - if (ptr - mem <= addr && addr < ptr - mem + len - 8) { - return (struct segment) { - .start = ptr - mem, - .end = len - 8, - .description = "ZLIB compressed payload", - }; - } - - - return empty_segment; - -} |