coomdev
2 years ago
4 changed files with 0 additions and 9370 deletions
@ -1,119 +0,0 @@ |
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#include <stdio.h> |
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#include <sys/mman.h> |
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#include <sys/stat.h> |
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#include <sys/fcntl.h> |
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#include <unistd.h> |
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#include <string.h> |
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#include <stdlib.h> |
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typedef unsigned char u8; |
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u8 *map_file(const char *file, size_t *sz) { |
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struct stat fs; |
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int fd = open(file, O_RDONLY); |
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fstat(fd, &fs); |
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*sz = fs.st_size; |
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u8 *filecontent = mmap(0, *sz, PROT_READ, MAP_PRIVATE, fd, 0); |
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return filecontent; |
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} |
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char sign[14] = "!\xFF\x0B""COOMTECH0.1"; |
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void write_gif_embedding(const u8 *data, size_t size) { |
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write(1, sign, sizeof(sign)); |
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u8 ws; |
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while (size) { |
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ws = size >= 255 ? 255 : size; |
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write(1, &ws, 1); |
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write(1, data, ws); |
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data += ws; |
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size -= ws; |
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} |
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ws = 0; |
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write(1, &ws, 1); |
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} |
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void extract_from_gif(const u8 *data, size_t size, |
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void **outdata, size_t *osize) { |
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const u8 *ptr = data; |
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u8 field = ptr[10]; |
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u8 gcte = !!(field & (1 << 7)); |
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const u8 *end = ptr + 13; |
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if (gcte) { |
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int gcts = 1 << ((field & 7) + 1); |
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end += 3 * gcts; |
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} |
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// skip
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while (*end == '!') { |
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if (memcmp(end, sign, sizeof(sign))) { |
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end += 3 + end[2]; |
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while (1) { |
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u8 v = *end++; |
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if (!v) |
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break; |
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end += v; |
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} |
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} else { |
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const u8 *count = end + sizeof(sign); |
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size_t t = 0; |
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while (*count) { |
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t += *count; |
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count += *count + 1; |
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} |
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void *buff = malloc(t); |
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count = end + 14; |
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t = 0; |
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while (*count) { |
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memcpy(buff + t, count + 1, *count); |
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t += *count; |
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count += *count + 1; |
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} |
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*osize = t; |
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*outdata = buff; |
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return; |
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} |
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} |
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} |
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#if 1 |
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int main(int argc, char *argv[argc]) { |
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size_t size; |
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u8 *file = map_file(argv[1], &size); |
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u8 *ptr = file; |
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|
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u8 field = ptr[10]; |
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u8 gcte = !!(field & (1 << 7)); |
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u8 *end = ptr + 13; |
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if (gcte) { |
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int gcts = 1 << ((field & 7) + 1); |
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end += 3 * gcts; |
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} |
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// skip
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if (memcmp(end, "!\xFF\x0BNETSCAPE2.0\x03\x01\x00\x00\x00", 19) == 0) |
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end += 19; |
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write(1, file, end - file); |
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|
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size_t size2; |
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u8 *file2 = map_file(argv[2], &size2); |
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write_gif_embedding(file2, size2); |
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write(1, end, size - (end - file)); |
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return 0; |
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} |
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#else |
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int main(int argc, char *argv[argc]) { |
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printf("%zu\n", sizeof(sign)); |
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size_t size, sz; |
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u8 *file = map_file(argv[1], &size); |
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u8 *ptr = file; |
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void *ext; |
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extract_from_gif(file, size, &ext, &sz); |
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printf("extracted (%zu bytes) %s\n", sz, ext); |
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return 0; |
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} |
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#endif |
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@ -1,116 +0,0 @@ |
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#include <stdio.h> |
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#include <sys/mman.h> |
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#include <sys/stat.h> |
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#include <sys/fcntl.h> |
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#include <unistd.h> |
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#include <string.h> |
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#include <stdlib.h> |
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typedef unsigned char u8; |
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u8 *map_file(const char *file, size_t *sz) { |
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struct stat fs; |
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int fd = open(file, O_RDONLY); |
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fstat(fd, &fs); |
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*sz = fs.st_size; |
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u8 *filecontent = mmap(0, *sz, PROT_READ, MAP_PRIVATE, fd, 0); |
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return filecontent; |
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} |
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|
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char sign[14] = "!\xFF\x0B""COOMTECH0.1"; |
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void write_gif_embedding(const u8 *data, size_t size) { |
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write(1, sign, sizeof(sign)); |
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u8 ws; |
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while (size) { |
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ws = size >= 255 ? 255 : size; |
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write(1, &ws, 1); |
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write(1, data, ws); |
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data += ws; |
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size -= ws; |
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} |
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ws = 0; |
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write(1, &ws, 1); |
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} |
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|
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void extract_from_gif(const u8 *data, size_t size, |
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void **outdata, size_t *osize) { |
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const u8 *ptr = data; |
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|
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u8 field = ptr[10]; |
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u8 gcte = !!(field & (1 << 7)); |
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const u8 *end = ptr + 13; |
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if (gcte) { |
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int gcts = 1 << ((field & 7) + 1); |
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end += 3 * gcts; |
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} |
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// skip
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while (*end == '!') { |
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if (memcmp(end, sign, sizeof(sign))) { |
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end += 3 + end[2]; |
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while (1) { |
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u8 v = *end++; |
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if (!v) |
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break; |
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end += v; |
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} |
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} else { |
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const u8 *count = end + sizeof(sign); |
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size_t t = 0; |
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while (*count) { |
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t += *count; |
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count += *count + 1; |
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} |
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void *buff = malloc(t); |
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count = end + 14; |
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t = 0; |
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while (*count) { |
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memcpy(buff + t, count + 1, *count); |
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t += *count; |
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count += *count + 1; |
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} |
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*osize = t; |
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*outdata = buff; |
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return; |
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} |
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} |
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} |
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#if 0 |
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|
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int main(int argc, char *argv[argc]) { |
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size_t size; |
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u8 *file = map_file(argv[1], &size); |
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u8 *ptr = file; |
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|
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u8 field = ptr[10]; |
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u8 gcte = !!(field & (1 << 7)); |
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u8 *end = ptr + 13; |
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if (gcte) { |
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int gcts = 1 << ((field & 7) + 1); |
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end += 3 * gcts; |
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} |
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// skip
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if (memcmp(end, "!\xFF\x0BNETSCAPE2.0\x03\x01\x00\x00\x00", 19) == 0) |
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end += 19; |
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write(1, file, end - file); |
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const char *str = "IM GOING TO COOM AAAAAAAAAAAA"; |
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write_gif_embedding(str, strlen(str)); |
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write(1, end, size - (end - file)); |
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return 0; |
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} |
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#else |
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int main(int argc, char *argv[argc]) { |
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printf("%zu\n", sizeof(sign)); |
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size_t size, sz; |
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u8 *file = map_file(argv[1], &size); |
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u8 *ptr = file; |
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void *ext; |
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extract_from_gif(file, size, &ext, &sz); |
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printf("extracted (%zu bytes) %s\n", sz, ext); |
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return 0; |
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} |
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#endif |
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File diff suppressed because it is too large
@ -1,4 +0,0 @@ |
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import { |
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require_readable_browser |
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} from "./chunk-TZ2VUZSL.js"; |
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export default require_readable_browser(); |
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