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#include <stdio.h>
/*
* RAS2BIN -- Convert a hex encoded raster to binary.
*
* Usage: ras2bin -encoding encoding -nx nx -ny ny infile outfile
*
* encoding hex1, hex2, hex1-rle, hex2-rle
* nx, ny raster size in pixels
* input input hex encoded, possible RLE (run length) encoded
* block of text. whitespace is ignored otherwise the file
* should contain only data.
* output output file to receive the binary array of pixels
*
* Perhaps this ought to take ras2text output and generate a Sun rasterfile,
* but currently we just decode the pixel data and output it in binary.
*/
main (argc, argv)
int argc;
char **argv;
{
char *infile=NULL, *outfile=NULL;
char pixels[102400];
int in, out, nx, ny, bias;
char *encoding;
int i;
for (i=1; i < argc; i++)
if (argv[i][0] == '-') {
if (strncmp (argv[i], "-en", 3) == 0)
encoding = argv[++i];
else if (strcmp (argv[i], "-nx") == 0)
nx = atoi (argv[++i]);
else if (strcmp (argv[i], "-ny") == 0)
ny = atoi (argv[++i]);
else if (strcmp (argv[i], "-bias") == 0)
bias = atoi (argv[++i]);
} else if (!infile) {
infile = argv[i];
} else if (!outfile)
outfile = argv[i];
if (!infile || !outfile || nx <= 0 || ny <= 0) {
fprintf (stderr, "bad usage\n");
exit (1);
}
printf ("input = %s\n", infile);
if ((in = open (infile, 0)) < 0) {
fprintf (stderr, "cannot open %s\n", infile);
exit (2);
}
printf ("read %d chars from input\n", read (in, pixels, 102400));
close (in);
printf ("output = %s\n", outfile);
if ((out = creat (outfile, 0644)) < 0) {
fprintf (stderr, "cannot open %s\n", outfile);
exit (3);
}
printRaster (out, pixels, encoding, nx, ny, bias);
close (out);
}
printRaster (out, pixels, encoding, nx, ny, bias)
int out;
char *pixels;
char *encoding;
int nx, ny;
int bias;
{
register char *ip;
register unsigned char *op;
register int v, i, j;
static unsigned char hex1[256], hex2[256];
static int have_tables = 0;
unsigned char *data, *otop;
char *sv_pixels = pixels;
/* Generate hex to binary lookup tables in first call. */
if (!have_tables) {
/* Generate char-to-binary table for the hex1 encoding. */
for (i=0; i < 256; i++)
hex1[i] = 0177;
for (i='0'; i <= '9'; i++)
hex1[i] = i - '0';
for (i='A'; i <= 'Z'; i++)
hex1[i] = i - 'A' + 10;
for (i='a'; i <= 'z'; i++)
hex1[i] = i - 'a' + 36;
hex1['$'] = 62;
hex1['_'] = 63;
/* Generate char-to-binary table for the hex2 encoding. */
for (i=0; i < 256; i++)
hex2[i] = 0177;
for (i='0'; i <= '9'; i++)
hex2[i] = i - '0';
for (i='a'; i <= 'f'; i++)
hex2[i] = i - 'a' + 10;
for (i='A'; i <= 'F'; i++)
hex2[i] = i - 'A' + 10;
have_tables++;
}
/* Decode the pixel data. */
if (!(data = (unsigned char *) malloc (nx * ny)))
return (-1);
otop = data + nx * ny;
/* Uncompress the input if RLE compression is indicated. */
if (strcmp (&encoding[strlen(encoding)-4], "-rle") == 0) {
int buflen = nx * ny * 2;
char *ibuf, *op;
int ch;
/* Get buffer to hold the uncompressed pixel data array. */
if (!(ibuf = (char *) malloc (buflen + 1)))
goto err;
/* Uncompress the pixel array. */
for (ip=pixels, op=ibuf; *ip; ) {
while (isspace (*ip))
ip++;
if ((ch = *ip++) == '@') {
if ((i = hex1[*ip++]) >= 0x7f)
while (*ip && ((i = hex1[*ip++]) >= 0x7f))
;
if (op-ibuf + i + 1 > buflen)
goto err;
for (v = *(op-1), i++; --i >= 0; )
*op++ = v;
} else if (ch == '%') {
if ((i = hex2[*ip++]) >= 0x7f)
while (*ip && ((i = hex2[*ip++]) >= 0x7f))
;
if ((j = hex2[*ip++]) >= 0x7f)
while (*ip && ((j = hex2[*ip++]) >= 0x7f))
;
i = ((i << 4) | j) + 1;
if (op-ibuf + i > buflen)
goto err;
for (v = *(op-1); --i >= 0; )
*op++ = v;
} else
*op++ = ch;
}
*op = '\0';
pixels = ibuf;
}
/* Convert the ascii pixels array to a binary data array.
*/
if (strcmp (encoding, "numeric") == 0) {
while (isspace (*ip))
ip++;
for (ip=pixels, op=data; *ip && op < otop; ) {
for (v=0; isdigit(*ip); )
v = v * 10 + *ip++ - '0';
*op++ = v + bias;
while (isspace (*ip))
ip++;
}
} else if (strncmp (encoding, "hex1", 4) == 0) {
for (ip=pixels, op=data; *ip && op < otop; ) {
if ((v = hex1[*ip++]) > 0xf)
while (*ip && ((v = hex1[*ip++]) > 0xf))
;
*op++ = v + bias;
}
} else if (strncmp (encoding, "hex2", 4) == 0) {
for (ip=pixels, op=data; *ip && op < otop; ) {
if ((v = hex2[*ip++]) > 0xf)
while (*ip && ((v = hex2[*ip++]) > 0xf))
;
if ((i = hex2[*ip++]) > 0xf)
while (*ip && ((i = hex2[*ip++]) > 0xf))
;
*op++ = ((v << 4) | i) + bias;
}
} else {
err: free ((char *)data);
if (pixels != sv_pixels)
free (pixels);
return (-1);
}
/* Write the pixels. */
write (out, data, op - data);
free ((char *)data);
if (pixels != sv_pixels)
free (pixels);
return (0);
}
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