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macutils
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macutils/hexbin/hqx.c

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#include "hexbin.h"
#ifdef HQX
#include "globals.h"
#include "readline.h"
#include "crc.h"
#include "buffer.h"
#include "../fileio/machdr.h"
#include "../fileio/wrfile.h"
#include "../util/util.h"
#include "printhdr.h"
extern void exit();
static void get_header();
static void oflush();
static int getq();
static long get2q();
static long get4q();
static getqbuf();
static char *g_macname;
/* New stuff which hopes to improve the speed. */
#define RUNCHAR 0x90
#define DONE 0x7F
#define SKIP 0x7E
#define FAIL 0x7D
static char lookup[256] = {
/* ^@ ^A ^B ^C ^D ^E ^F ^G */
/* 0*/ FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
/* \b \t \n ^K ^L \r ^N ^O */
/* 1*/ FAIL, FAIL, SKIP, FAIL, FAIL, SKIP, FAIL, FAIL,
/* ^P ^Q ^R ^S ^T ^U ^V ^W */
/* 2*/ FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
/* ^X ^Y ^Z ^[ ^\ ^] ^^ ^_ */
/* 3*/ FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
/* ! " # $ % & ' */
/* 4*/ FAIL, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
/* ( ) * + , - . / */
/* 5*/ 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, FAIL, FAIL,
/* 0 1 2 3 4 5 6 7 */
/* 6*/ 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, FAIL,
/* 8 9 : ; < = > ? */
/* 7*/ 0x14, 0x15, DONE, FAIL, FAIL, FAIL, FAIL, FAIL,
/* @ A B C D E F G */
/* 8*/ 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D,
/* H I J K L M N O */
/* 9*/ 0x1E, 0x1F, 0x20, 0x21, 0x22, 0x23, 0x24, FAIL,
/* P Q R S T U V W */
/*10*/ 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, FAIL,
/* X Y Z [ \ ] ^ _ */
/*11*/ 0x2C, 0x2D, 0x2E, 0x2F, FAIL, FAIL, FAIL, FAIL,
/* ` a b c d e f g */
/*12*/ 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, FAIL,
/* h i j k l m n o */
/*13*/ 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C, FAIL, FAIL,
/* p q r s t u v w */
/*14*/ 0x3D, 0x3E, 0x3F, FAIL, FAIL, FAIL, FAIL, FAIL,
/* x y z { | } ~ ^? */
/*15*/ FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
/*16*/ FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
};
static int stop = 0;
static unsigned char obuf[BUFSIZ];
static unsigned char *op = obuf;
static unsigned char *oq;
#define S_HEADER 0
#define S_DATAOPEN 1
#define S_DATAWRITE 2
#define S_DATAC1 3
#define S_DATAC2 4
#define S_RSRCOPEN 5
#define S_RSRCWRITE 6
#define S_RSRCC1 7
#define S_RSRCC2 8
#define S_EXCESS 9
static int ostate = S_HEADER;
static unsigned long calc_crc;
static unsigned long file_crc;
static long todo;
#define output(c) { *op++ = (c); if(op >= &obuf[BUFSIZ]) oflush(); }
void hqx(macname)
char *macname;
{
int n, normlen, c;
register char *in, *out;
register int b6, b8, data, lastc = 0;
char state68 = 0, run = 0, linestate, first = 1;
g_macname = macname;
ostate = S_HEADER;
stop = 0;
while(!stop) {
n = strlen((char *)line);
while(n > 0 && line[n - 1] == ' ') {
n--;
}
out = line+n;
if(uneven_lines) {
goto skipcheck;
}
if(first) {
normlen = n;
}
/* Check line for intermediate garbage */
linestate = SKIP;
for(in = line; in < out; in++) {
if((linestate = lookup[*in & 0xff]) == FAIL ||
((linestate == DONE) && !first)) {
break;
}
}
if(linestate != FAIL && n != normlen && linestate != DONE) {
c = fgetc(ifp);
(void)ungetc(c, ifp);
if(lookup[c] == DONE) {
linestate = DONE;
}
}
if(linestate == FAIL || (n != normlen && linestate != DONE)) {
if(verbose && n > 0) {
*out = 0;
(void)fprintf(stderr, "Skip:%s\n", line);
}
if(readline()) {
continue;
} else {
break;
}
}
skipcheck:
in = line;
do {
if((b6 = lookup[*in & 0xff]) >= 64) {
switch (b6) {
case DONE:
first = !first;
if(first) {
goto done;
}
case SKIP:
break;
default:
if(uneven_lines) {
break;
}
(void)fprintf(stderr, "bad char '%c'(%d)\n", *in, *in);
goto done;
}
} else {
/* Pack 6 bits to 8 bits */
switch (state68++) {
case 0:
b8 = b6<<2;
continue; /* No data byte */
case 1:
data = b8 | (b6>>4);
b8 = (b6&0xF) << 4;
break;
case 2:
data = b8 | (b6>>2);
b8 = (b6&0x3) << 6;
break;
case 3:
data = b8 | b6;
state68 = 0;
break;
}
if(!run) {
if(data == RUNCHAR) {
run = 1;
} else {
output(lastc = data);
}
}
else {
if(data == 0) {
output(lastc = RUNCHAR);
} else {
while(--data > 0) {
output(lastc);
}
}
run = 0;
}
}
} while(++in < out);
if(!stop) {
if(!readline()) {
break;
}
}
}
done:
oflush();
if(!stop && ostate != S_EXCESS) {
(void)fprintf(stderr, "premature EOF\n");
#ifdef SCAN
do_error("hexbin: premature EOF");
#endif /* SCAN */
exit(1);
}
end_put();
print_header2(verbose);
}
static void get_header()
{
int n;
unsigned long calc_crc, file_crc;
crc = INITCRC; /* compute a crc for the header */
for(n = 0; n < INFOBYTES; n++) {
info[n] = 0;
}
n = getq(); /* namelength */
n++; /* must read trailing null also */
getqbuf(trname, n); /* read name */
if(g_macname[0] == '\0') {
g_macname = trname;
}
n = strlen(g_macname);
if(n > F_NAMELEN) {
n = F_NAMELEN;
}
(void)strncpy(mh.m_name, g_macname, n);
mh.m_name[n] = '\0';
getqbuf(mh.m_type, 4);
getqbuf(mh.m_author, 4);
mh.m_flags = get2q();
mh.m_datalen = get4q();
mh.m_rsrclen = get4q();
calc_crc = crc;
file_crc = get2q();
verify_crc(calc_crc, file_crc);
if(listmode) {
(void)fprintf(stderr, "This file is in \"hqx\" format.\n");
}
transname(mh.m_name, trname, n);
define_name(trname);
print_header0(0);
print_header1(0, verbose);
info[I_NAMEOFF] = n;
(void)strncpy(info + I_NAMEOFF + 1, mh.m_name, n);
(void)strncpy(info + I_TYPEOFF, mh.m_type, 4);
(void)strncpy(info + I_AUTHOFF, mh.m_author, 4);
put2(info + I_FLAGOFF, (unsigned long)mh.m_flags);
put4(info + I_DLENOFF, (unsigned long)mh.m_datalen);
put4(info + I_RLENOFF, (unsigned long)mh.m_rsrclen);
put4(info + I_CTIMOFF, (unsigned long)mh.m_createtime);
put4(info + I_MTIMOFF, (unsigned long)mh.m_modifytime);
}
static void oflush()
{
int n, i;
oq = obuf;
while(oq < op && !stop) {
switch (ostate) {
case S_HEADER:
get_header();
++ostate;
break;
case S_DATAOPEN:
set_put(1);
todo = mh.m_datalen;
crc = INITCRC;
++ostate;
break;
case S_RSRCOPEN:
set_put(0);
todo = mh.m_rsrclen;
crc = INITCRC;
++ostate;
break;
case S_DATAWRITE:
case S_RSRCWRITE:
n = op-oq;
if(n > todo) {
n = todo;
}
for(i = 0; i < n; i++) {
put_byte((char)(oq[i]));
}
comp_q_crc_n(oq, oq+n);
oq += n;
todo -= n;
if(todo <= 0) {
++ostate;
}
break;
case S_DATAC1:
case S_RSRCC1:
calc_crc = crc;
file_crc = getq() << 8;
++ostate;
break;
case S_DATAC2:
case S_RSRCC2:
/* Skip crc bytes */
file_crc |= getq();
verify_crc(calc_crc, file_crc);
++ostate;
break;
case S_EXCESS:
(void)fprintf(stderr, "%d excess bytes ignored\n", op-oq);
oq = op;
break;
}
}
op = obuf;
}
static int getq()
{
int c;
if(oq >= op) {
(void)fprintf(stderr, "premature EOF\n");
#ifdef SCAN
do_error("hexbin: premature EOF");
#endif /* SCAN */
exit(1);
}
c = *oq++ & 0xff;
comp_q_crc((unsigned)c);
return c;
}
/* get2q(); q format -- read 2 bytes from input, return short */
static long get2q()
{
short high = getq() << 8;
return high | getq();
}
/* get4q(); q format -- read 4 bytes from input, return long */
static long get4q()
{
int i;
long value = 0;
for(i = 0; i < 4; i++) {
value = (value<<8) | getq();
}
return value;
}
/* getqbuf(); q format -- read n characters from input into buf */
static getqbuf(buf, n)
char *buf;
int n;
{
int i;
for(i = 0; i < n; i++) {
*buf++ = getq();
}
}
#else /* HQX */
int hqx; /* keep lint and some compilers happy */
#endif /* HQX */
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