minix3/commands/cawf/device.c

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2020-02-21 00:59:27 +05:30
/*
* device.c -- cawf(1) output device support functions
*/
/*
* Copyright (c) 1991 Purdue University Research Foundation,
* West Lafayette, Indiana 47907. All rights reserved.
*
* Written by Victor A. Abell <abe@mace.cc.purdue.edu>, Purdue
* University Computing Center. Not derived from licensed software;
* derived from awf(1) by Henry Spencer of the University of Toronto.
*
* Permission is granted to anyone to use this software for any
* purpose on any computer system, and to alter it and redistribute
* it freely, subject to the following restrictions:
*
* 1. The author is not responsible for any consequences of use of
* this software, even if they arise from flaws in it.
*
* 2. The origin of this software must not be misrepresented, either
* by explicit claim or by omission. Credits must appear in the
* documentation.
*
* 3. Altered versions must be plainly marked as such, and must not
* be misrepresented as being the original software. Credits must
* appear in the documentation.
*
* 4. This notice may not be removed or altered.
*/
#include "cawf.h"
#include <ctype.h>
static unsigned char *Convstr(char *s, int *len);
static int Convfont(char *nm, char *s, char **fn, unsigned char **fi);
#ifndef UNIX
#define strcasecmp strcmpi
#endif
/*
* Convstr(s, len) - convert a string
*/
static unsigned char *
Convstr(s, len)
char *s; /* input string */
int *len; /* length of result */
{
int c; /* character assembly */
unsigned char *cp; /* temporary character pointer */
char *em; /* error message */
int i; /* temporary index */
int l; /* length */
unsigned char *r; /* result string */
/*
* Make space for the result.
*/
if ((r = (unsigned char *)malloc(strlen((char *)s) + 1)) == NULL) {
(void) fprintf(stderr, "%s: out of string space at %s\n",
Pname, s);
return(NULL);
}
/*
* Copy the input string to the result, processing '\\' escapes.
*/
for (cp = r, l = 0; *s;) {
switch (*s) {
case '\\':
s++;
if (*s >= '0' && *s <= '7') {
/*
* '\xxx' -- octal form
*/
for (c = i = 0; i < 3; i++, s++) {
if (*s < '0' || *s > '7') {
em = "non-octal char";
bad_string:
(void) fprintf(stderr,
"%s: %s : %s\n",
Pname, em, (char *)r);
return(NULL);
}
c = (c << 3) + *s - '0';
}
if (c > 0377) {
em = "octal char > 0377";
goto bad_string;
}
*cp++ = c;
l++;
} else if (*s == 'x') {
/*
* '\xyy' -- hexadecimal form
*/
s++;
for (c = i = 0; i < 2; i++, s++) {
#if defined(__STDC__)
if ( ! isalpha(*s) && ! isdigit(*s))
#else
if ( ! isascii(*s) && ! isalpha(*s)
&& ! isdigit(*s))
#endif
{
non_hex_char:
em = "non-hex char";
goto bad_string;
}
c = c << 4;
if (*s >= '0' && *s <= '9')
c += *s - '0';
else if ((*s >= 'a' && *s <= 'f')
|| (*s >= 'A' && *s <= 'F'))
c += *s + 10 -
(isupper(*s) ? 'A' : 'a');
else
goto non_hex_char;
}
*cp++ = (unsigned char)c;
l++;
} else if (*s == 'E' || *s == 'e') {
/*
* '\E' or '\e' -- ESCape
*/
*cp++ = ESC;
l++;
s++;
} else if (*s == '\0') {
em = "no char after \\";
goto bad_string;
} else {
/*
* escaped character (for some reason)
*/
*cp++ = *s++;
l++;
}
break;
/*
* Copy a "normal" character.
*/
default:
*cp++ = *s++;
l++;
}
}
*cp = '\0';
*len = l;
return(r);
}
/*
* Convfont(nm, s, fn, fi) - convert a font for a device
*/
static int
Convfont(nm, s, fn, fi)
char *nm; /* output device name */
char *s; /* font definition string */
char **fn; /* font name address */
unsigned char **fi; /* initialization string address */
{
char *cp; /* temporary character pointer */
int len; /* length */
/*
* Get the font name, allocate space for it and allocate space for
* a font structure.
*/
if ((cp = strchr(s, '=')) == NULL) {
(void) fprintf(stderr, "%s: bad %s font line format: %s\n",
Pname, nm, s);
return(0);
}
if ((*fn = (char *)malloc(cp - s + 1)) == NULL) {
(void) fprintf(stderr, "%s: no space for %s font name %s\n",
Pname, nm, s);
return(0);
}
(void) strncpy(*fn, s, cp - s);
(*fn)[cp - s] = '\0';
/*
* Assmble the font initialization string.
*/
if ((*fi = Convstr(cp + 1, &len)) == NULL)
return(0);
return(len);
}
/*
* Defdev() - define the output device
*/
int
Defdev()
{
unsigned char *fi = NULL; /* last font initialization string */
char *fn = NULL; /* font name */
int fd = 0; /* found-device flag */
FILE *fs; /* file stream */
int err = 0; /* errror count */
int i; /* temporary index */
int len; /* length */
char line[MAXLINE]; /* line buffer */
char *p; /* output device configuration file */
char *s; /* temporary string pointer */
/*
* Check for the built-in devices, ANSI, NONE or NORMAL (default).
*/
Fstr.b = Fstr.i = Fstr.it = Fstr.r = NULL;
Fstr.bl = Fstr.il = Fstr.itl = Fstr.rl = 0;
if (Device == NULL || strcasecmp(Device, "normal") == 0) {
Fontctl = 0;
check_font:
if (Devfont) {
(void) fprintf(stderr,
"%s: font %s for device %s illegal\n",
Pname, Devfont, Device ? Device : "NORMAL");
return(1);
}
return(0);
}
Fontctl = 1;
if (strcasecmp(Device, "ansi") == 0) {
Fstr.b = Newstr((unsigned char *)"x[1m");
Fstr.it = Newstr((unsigned char *)"x[4m");
Fstr.r = Newstr((unsigned char *)"x[0m");
Fstr.b[0] = Fstr.it[0] = Fstr.r[0] = ESC;
Fstr.bl = Fstr.itl = Fstr.rl = 4;
goto check_font;
}
if (strcasecmp(Device, "none") == 0)
goto check_font;
/*
* If a device configuration file path is supplied, use it.
*/
if (Devconf)
p = Devconf;
else {
/*
* Use the CAWFLIB environment if it is defined.
*/
if ((p = getenv("CAWFLIB")) == NULL)
p = CAWFLIB;
len = strlen(p) + 1 + strlen(DEVCONFIG) + 1;
if ((s = (char *)malloc(len)) == NULL) {
(void) fprintf(stderr, "%s: no space for %s name\n",
Pname, DEVCONFIG);
return(1);
}
(void) sprintf(s, "%s/%s", p, DEVCONFIG);
p = s;
}
/*
* Open the configuration file.
*/
#ifdef UNIX
if ((fs = fopen(p, "r")) == NULL)
#else
if ((fs = fopen(p, "rt")) == NULL)
#endif
{
(void) fprintf(stderr, "%s: can't open config file: %s\n",
Pname, p);
return(1);
}
*line = ' ';
/*
* Look for a device definition line -- a line that begins with a name.
*/
while ( ! feof(fs)) {
if (*line == '\t' || *line == '#' || *line == ' ') {
(void) fgets(line, MAXLINE, fs);
continue;
}
if ((s = strrchr(line, '\n')) != NULL)
*s = '\0';
else
line[MAXLINE-1] = '\0';
/*
* Match device name.
*/
if (strcmp(Device, line) != 0) {
(void) fgets(line, MAXLINE, fs);
continue;
}
fd = 1;
/*
* Read the parameter lines for the device.
*/
while (fgets(line, MAXLINE, fs) != NULL) {
if (*line == ' ') {
for (i = 1; line[i] == ' '; i++)
;
} else if (*line == '\t')
i = 1;
else
break;
#if defined(__STDC__)
if ( ! isalpha(line[i])
#else
if ( ! isascii(line[i]) || ! isalpha(line[i])
#endif
|| line[i+1] != '=')
break;
if ((s = strrchr(line, '\n')) != NULL)
*s = '\0';
else
line[MAXLINE-1] = '\0';
switch (line[i]) {
/*
* \tb=<bolding_string>
*/
case 'b':
if (Fstr.b != NULL) {
(void) fprintf(stderr,
"%s: dup bold for %s in %s: %s\n",
Pname, Device, p, line);
(void) free(Fstr.b);
Fstr.b = NULL;
}
if ((Fstr.b = Convstr(&line[i+2], &Fstr.bl))
== NULL)
err++;
break;
/*
* \ti=<italicization_string>
*/
case 'i':
if (Fstr.it != NULL) {
(void) fprintf(stderr,
"%s: dup italic for %s in %s: %s\n",
Pname, Device, p, line);
(void) free(Fstr.it);
Fstr.it = NULL;
}
if ((Fstr.it = Convstr(&line[i+2], &Fstr.itl))
== NULL)
err++;
break;
/*
* \tr=<return_to_Roman_string>
*/
case 'r':
if (Fstr.r != NULL) {
(void) fprintf(stderr,
"%s: dup roman for %s in %s: %s\n",
Pname, Device, p, line);
(void) free(Fstr.r);
Fstr.r = NULL;
}
if ((Fstr.r = Convstr(&line[i+2], &Fstr.rl))
== NULL)
err++;
break;
/*
* \tf=<font_name>=<font_initialization_string>
*/
case 'f':
if ( ! Devfont || Fstr.i)
break;
if ((i = Convfont(Device, &line[i+2], &fn, &fi))
< 0)
err++;
else if (fn && strcmp(Devfont, fn) == 0) {
Fstr.i = fi;
Fstr.il = i;
fi = NULL;
}
if (fn) {
(void) free(fn);
fn = NULL;
}
if (fi) {
(void) free((char *)fi);
fi = NULL;
}
break;
/*
* ????
*/
default:
(void) fprintf(stderr,
"%s: unknown device %s line: %s\n",
Pname, Device, line);
err++;
}
}
break;
}
(void) fclose(fs);
if (err)
return(1);
/*
* See if the device stanza was located and the font exists.
*/
if ( ! fd) {
(void) fprintf(stderr, "%s: can't find device %s in %s\n",
Pname, Device, p);
return(1);
}
if (Devfont && ! Fstr.i) {
(void) fprintf(stderr,
"%s: font %s for device %s not found in %s\n",
Pname, Devfont, Device, p);
return(1);
}
return(0);
}