static int read_pk_char_header (struct pk_header_ *h, unsigned char opcode, FILE *fp) { ASSERT(h); if ((opcode & 4) == 0) { /* short */ h->pkt_len = (opcode & 3) * 0x100U + get_unsigned_byte(fp); h->chrcode = get_unsigned_byte(fp); h->wd = get_unsigned_triple(fp); /* TFM width */ h->dx = get_unsigned_byte(fp) << 16; /* horizontal escapement */ h->dy = 0L; h->bm_wd = get_unsigned_byte(fp); h->bm_ht = get_unsigned_byte(fp); h->bm_hoff = get_signed_byte(fp); h->bm_voff = get_signed_byte(fp); h->pkt_len -= 8; } else if ((opcode & 7) == 7) { /* long */ h->pkt_len = get_unsigned_quad(fp); h->chrcode = get_signed_quad(fp); h->wd = get_signed_quad(fp); h->dx = get_signed_quad(fp); /* 16.16 fixed point number in pixels */ h->dy = get_signed_quad(fp); h->bm_wd = get_signed_quad(fp); h->bm_ht = get_signed_quad(fp); h->bm_hoff = get_signed_quad(fp); h->bm_voff = get_signed_quad(fp); h->pkt_len -= 28; } else { /* extended short */ h->pkt_len = (opcode & 3) * 0x10000UL + get_unsigned_pair(fp); h->chrcode = get_unsigned_byte(fp); h->wd = get_unsigned_triple(fp); h->dx = get_unsigned_pair(fp) << 16; h->dy = 0x0L; h->bm_wd = get_unsigned_pair(fp); h->bm_ht = get_unsigned_pair(fp); h->bm_hoff = get_signed_pair(fp); h->bm_voff = get_signed_pair(fp); h->pkt_len -= 13; } h->dyn_f = opcode / 16; h->run_color = (opcode & 8) ? 1 : 0; if (h->chrcode > 0xff) { WARN("Unable to handle long characters in PK files: code=0x%04x", h->chrcode); return -1; } return 0; }
signed int get_signed_triple(FILE *file) { int i; signed int triple = get_signed_byte(file); for (i=0; i<2; i++) { triple = (triple << 8) | get_unsigned_byte(file); } return triple; }
int32_t get_signed_quad(FILE *file) { int i; int32_t quad = get_signed_byte(file); for (i=0; i<3; i++) { quad = (quad << 8) | get_unsigned_byte(file); } return quad; }
signed short get_signed_pair (FILE *file) { signed short pair = get_signed_byte(file); pair = (pair << 8) | get_unsigned_byte(file); return pair; }