| 7421 | |
| 7422 | #ifndef STBI_NO_PIC |
| 7423 | static int stbi__pic_info(stbi__context *s, int *x, int *y, int *comp) |
| 7424 | { |
| 7425 | int act_comp=0,num_packets=0,chained,dummy; |
| 7426 | stbi__pic_packet packets[10]; |
| 7427 | |
| 7428 | if (!x) x = &dummy; |
| 7429 | if (!y) y = &dummy; |
| 7430 | if (!comp) comp = &dummy; |
| 7431 | |
| 7432 | if (!stbi__pic_is4(s,"\x53\x80\xF6\x34")) { |
| 7433 | stbi__rewind(s); |
| 7434 | return 0; |
| 7435 | } |
| 7436 | |
| 7437 | stbi__skip(s, 88); |
| 7438 | |
| 7439 | *x = stbi__get16be(s); |
| 7440 | *y = stbi__get16be(s); |
| 7441 | if (stbi__at_eof(s)) { |
| 7442 | stbi__rewind( s); |
| 7443 | return 0; |
| 7444 | } |
| 7445 | if ( (*x) != 0 && (1 << 28) / (*x) < (*y)) { |
| 7446 | stbi__rewind( s ); |
| 7447 | return 0; |
| 7448 | } |
| 7449 | |
| 7450 | stbi__skip(s, 8); |
| 7451 | |
| 7452 | do { |
| 7453 | stbi__pic_packet *packet; |
| 7454 | |
| 7455 | if (num_packets==sizeof(packets)/sizeof(packets[0])) |
| 7456 | return 0; |
| 7457 | |
| 7458 | packet = &packets[num_packets++]; |
| 7459 | chained = stbi__get8(s); |
| 7460 | packet->size = stbi__get8(s); |
| 7461 | packet->type = stbi__get8(s); |
| 7462 | packet->channel = stbi__get8(s); |
| 7463 | act_comp |= packet->channel; |
| 7464 | |
| 7465 | if (stbi__at_eof(s)) { |
| 7466 | stbi__rewind( s ); |
| 7467 | return 0; |
| 7468 | } |
| 7469 | if (packet->size != 8) { |
| 7470 | stbi__rewind( s ); |
| 7471 | return 0; |
| 7472 | } |
| 7473 | } while (chained); |
| 7474 | |
| 7475 | *comp = (act_comp & 0x10 ? 4 : 3); |
| 7476 | |
| 7477 | return 1; |
| 7478 | } |
| 7479 | #endif |
| 7480 |
no test coverage detected