This will make a number of things easier in the future, as well as (finally!) avoiding the Id-smashing problem which has plagued developers for so long. Boy, I'm glad we're not using sup anymore. This update would have been insane otherwise.
76 lines
2.4 KiB
C
76 lines
2.4 KiB
C
/*-
|
|
* Copyright (c) 1994 Søren Schmidt
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer,
|
|
* in this position and unchanged.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software withough specific prior written permission
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
|
|
int decode(FILE *fd, char *buffer)
|
|
{
|
|
int n, pos = 0;
|
|
char *p;
|
|
char temp[128];
|
|
|
|
#define DEC(c) (((c) - ' ') & 0x3f)
|
|
|
|
do {
|
|
if (!fgets(temp, sizeof(temp), fd))
|
|
return(0);
|
|
} while (strncmp(temp, "begin ", 6));
|
|
sscanf(temp, "begin %o %s", &n, temp);
|
|
for (;;) {
|
|
if (!fgets(p = temp, sizeof(temp), fd))
|
|
return(0);
|
|
if ((n = DEC(*p)) <= 0)
|
|
break;
|
|
for (++p; n > 0; p += 4, n -= 3)
|
|
if (n >= 3) {
|
|
buffer[pos++] = DEC(p[0])<<2 | DEC(p[1])>>4;
|
|
buffer[pos++] = DEC(p[1])<<4 | DEC(p[2])>>2;
|
|
buffer[pos++] = DEC(p[2])<<6 | DEC(p[3]);
|
|
}
|
|
else {
|
|
if (n >= 1) {
|
|
buffer[pos++] =
|
|
DEC(p[0])<<2 | DEC(p[1])>>4;
|
|
}
|
|
if (n >= 2) {
|
|
buffer[pos++] =
|
|
DEC(p[1])<<4 | DEC(p[2])>>2;
|
|
}
|
|
if (n >= 3) {
|
|
buffer[pos++] =
|
|
DEC(p[2])<<6 | DEC(p[3]);
|
|
}
|
|
}
|
|
}
|
|
if (!fgets(temp, sizeof(temp), fd) || strcmp(temp, "end\n"))
|
|
return(0);
|
|
return(pos);
|
|
}
|