| [9] | 1 | /*
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| 2 | * device.c -- cawf(1) output device support functions
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| 3 | */
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| 4 |
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| 5 | /*
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| 6 | * Copyright (c) 1991 Purdue University Research Foundation,
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| 7 | * West Lafayette, Indiana 47907. All rights reserved.
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| 8 | *
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| 9 | * Written by Victor A. Abell <abe@mace.cc.purdue.edu>, Purdue
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| 10 | * University Computing Center. Not derived from licensed software;
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| 11 | * derived from awf(1) by Henry Spencer of the University of Toronto.
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| 12 | *
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| 13 | * Permission is granted to anyone to use this software for any
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| 14 | * purpose on any computer system, and to alter it and redistribute
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| 15 | * it freely, subject to the following restrictions:
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| 16 | *
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| 17 | * 1. The author is not responsible for any consequences of use of
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| 18 | * this software, even if they arise from flaws in it.
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| 19 | *
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| 20 | * 2. The origin of this software must not be misrepresented, either
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| 21 | * by explicit claim or by omission. Credits must appear in the
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| 22 | * documentation.
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| 23 | *
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| 24 | * 3. Altered versions must be plainly marked as such, and must not
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| 25 | * be misrepresented as being the original software. Credits must
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| 26 | * appear in the documentation.
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| 27 | *
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| 28 | * 4. This notice may not be removed or altered.
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| 29 | */
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| 30 |
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| 31 | #include "cawf.h"
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| 32 | #include <ctype.h>
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| 33 |
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| 34 | _PROTOTYPE(static unsigned char *Convstr,(char *s, int *len));
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| 35 | _PROTOTYPE(static int Convfont,(char *nm, char *s, char **fn,
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| 36 | unsigned char **fi));
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| 37 |
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| 38 | #ifndef UNIX
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| 39 | #define strcasecmp strcmpi
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| 40 | #endif
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| 41 |
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| 42 |
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| 43 |
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| 44 | /*
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| 45 | * Convstr(s, len) - convert a string
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| 46 | */
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| 47 |
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| 48 | static unsigned char *
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| 49 | Convstr(s, len)
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| 50 | char *s; /* input string */
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| 51 | int *len; /* length of result */
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| 52 | {
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| 53 | int c; /* character assembly */
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| 54 | unsigned char *cp; /* temporary character pointer */
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| 55 | char *em; /* error message */
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| 56 | int i; /* temporary index */
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| 57 | int l; /* length */
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| 58 | unsigned char *r; /* result string */
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| 59 | /*
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| 60 | * Make space for the result.
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| 61 | */
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| 62 | if ((r = (unsigned char *)malloc(strlen((char *)s) + 1)) == NULL) {
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| 63 | (void) fprintf(stderr, "%s: out of string space at %s\n",
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| 64 | Pname, s);
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| 65 | return(NULL);
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| 66 | }
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| 67 | /*
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| 68 | * Copy the input string to the result, processing '\\' escapes.
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| 69 | */
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| 70 | for (cp = r, l = 0; *s;) {
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| 71 | switch (*s) {
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| 72 |
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| 73 | case '\\':
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| 74 | s++;
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| 75 | if (*s >= '0' && *s <= '7') {
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| 76 | /*
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| 77 | * '\xxx' -- octal form
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| 78 | */
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| 79 | for (c = i = 0; i < 3; i++, s++) {
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| 80 | if (*s < '0' || *s > '7') {
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| 81 | em = "non-octal char";
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| 82 | bad_string:
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| 83 | (void) fprintf(stderr,
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| 84 | "%s: %s : %s\n",
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| 85 | Pname, em, (char *)r);
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| 86 | return(NULL);
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| 87 | }
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| 88 | c = (c << 3) + *s - '0';
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| 89 | }
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| 90 | if (c > 0377) {
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| 91 | em = "octal char > 0377";
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| 92 | goto bad_string;
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| 93 | }
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| 94 | *cp++ = c;
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| 95 | l++;
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| 96 | } else if (*s == 'x') {
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| 97 | /*
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| 98 | * '\xyy' -- hexadecimal form
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| 99 | */
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| 100 | s++;
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| 101 | for (c = i = 0; i < 2; i++, s++) {
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| 102 | #if defined(__STDC__)
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| 103 | if ( ! isalpha(*s) && ! isdigit(*s))
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| 104 | #else
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| 105 | if ( ! isascii(*s) && ! isalpha(*s)
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| 106 | && ! isdigit(*s))
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| 107 | #endif
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| 108 | {
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| 109 | non_hex_char:
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| 110 | em = "non-hex char";
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| 111 | goto bad_string;
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| 112 | }
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| 113 | c = c << 4;
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| 114 | if (*s >= '0' && *s <= '9')
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| 115 | c += *s - '0';
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| 116 | else if ((*s >= 'a' && *s <= 'f')
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| 117 | || (*s >= 'A' && *s <= 'F'))
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| 118 | c += *s + 10 -
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| 119 | (isupper(*s) ? 'A' : 'a');
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| 120 | else
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| 121 | goto non_hex_char;
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| 122 | }
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| 123 | *cp++ = (unsigned char)c;
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| 124 | l++;
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| 125 | } else if (*s == 'E' || *s == 'e') {
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| 126 | /*
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| 127 | * '\E' or '\e' -- ESCape
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| 128 | */
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| 129 | *cp++ = ESC;
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| 130 | l++;
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| 131 | s++;
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| 132 | } else if (*s == '\0') {
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| 133 | em = "no char after \\";
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| 134 | goto bad_string;
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| 135 | } else {
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| 136 | /*
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| 137 | * escaped character (for some reason)
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| 138 | */
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| 139 | *cp++ = *s++;
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| 140 | l++;
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| 141 | }
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| 142 | break;
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| 143 | /*
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| 144 | * Copy a "normal" character.
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| 145 | */
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| 146 | default:
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| 147 | *cp++ = *s++;
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| 148 | l++;
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| 149 | }
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| 150 | }
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| 151 | *cp = '\0';
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| 152 | *len = l;
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| 153 | return(r);
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| 154 | }
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| 155 |
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| 156 |
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| 157 | /*
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| 158 | * Convfont(nm, s, fn, fi) - convert a font for a device
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| 159 | */
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| 160 |
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| 161 | static int
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| 162 | Convfont(nm, s, fn, fi)
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| 163 | char *nm; /* output device name */
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| 164 | char *s; /* font definition string */
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| 165 | char **fn; /* font name address */
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| 166 | unsigned char **fi; /* initialization string address */
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| 167 | {
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| 168 | char *cp; /* temporary character pointer */
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| 169 | int len; /* length */
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| 170 | /*
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| 171 | * Get the font name, allocate space for it and allocate space for
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| 172 | * a font structure.
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| 173 | */
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| 174 | if ((cp = strchr(s, '=')) == NULL) {
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| 175 | (void) fprintf(stderr, "%s: bad %s font line format: %s\n",
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| 176 | Pname, nm, s);
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| 177 | return(0);
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| 178 | }
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| 179 | if ((*fn = (char *)malloc(cp - s + 1)) == NULL) {
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| 180 | (void) fprintf(stderr, "%s: no space for %s font name %s\n",
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| 181 | Pname, nm, s);
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| 182 | return(0);
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| 183 | }
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| 184 | (void) strncpy(*fn, s, cp - s);
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| 185 | (*fn)[cp - s] = '\0';
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| 186 | /*
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| 187 | * Assmble the font initialization string.
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| 188 | */
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| 189 | if ((*fi = Convstr(cp + 1, &len)) == NULL)
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| 190 | return(0);
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| 191 | return(len);
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| 192 | }
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| 193 |
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| 194 |
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| 195 | /*
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| 196 | * Defdev() - define the output device
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| 197 | */
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| 198 |
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| 199 | int
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| 200 | Defdev()
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| 201 | {
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| 202 | unsigned char *fi = NULL; /* last font initialization string */
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| 203 | char *fn = NULL; /* font name */
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| 204 | int fd = 0; /* found-device flag */
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| 205 | FILE *fs; /* file stream */
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| 206 | int err = 0; /* errror count */
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| 207 | int i; /* temporary index */
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| 208 | int len; /* length */
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| 209 | char line[MAXLINE]; /* line buffer */
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| 210 | char *p; /* output device configuration file */
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| 211 | char *s; /* temporary string pointer */
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| 212 | /*
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| 213 | * Check for the built-in devices, ANSI, NONE or NORMAL (default).
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| 214 | */
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| 215 | Fstr.b = Fstr.i = Fstr.it = Fstr.r = NULL;
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| 216 | Fstr.bl = Fstr.il = Fstr.itl = Fstr.rl = 0;
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| 217 | if (Device == NULL || strcasecmp(Device, "normal") == 0) {
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| 218 | Fontctl = 0;
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| 219 | check_font:
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| 220 | if (Devfont) {
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| 221 | (void) fprintf(stderr,
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| 222 | "%s: font %s for device %s illegal\n",
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| 223 | Pname, Devfont, Device ? Device : "NORMAL");
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| 224 | return(1);
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| 225 | }
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| 226 | return(0);
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| 227 | }
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| 228 | Fontctl = 1;
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| 229 | if (strcasecmp(Device, "ansi") == 0) {
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| 230 | Fstr.b = Newstr((unsigned char *)"x[1m");
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| 231 | Fstr.it = Newstr((unsigned char *)"x[4m");
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| 232 | Fstr.r = Newstr((unsigned char *)"x[0m");
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| 233 | Fstr.b[0] = Fstr.it[0] = Fstr.r[0] = ESC;
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| 234 | Fstr.bl = Fstr.itl = Fstr.rl = 4;
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| 235 | goto check_font;
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| 236 | }
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| 237 | if (strcasecmp(Device, "none") == 0)
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| 238 | goto check_font;
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| 239 | /*
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| 240 | * If a device configuration file path is supplied, use it.
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| 241 | */
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| 242 | if (Devconf)
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| 243 | p = Devconf;
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| 244 | else {
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| 245 |
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| 246 | /*
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| 247 | * Use the CAWFLIB environment if it is defined.
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| 248 | */
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| 249 | if ((p = getenv("CAWFLIB")) == NULL)
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| 250 | p = CAWFLIB;
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| 251 | len = strlen(p) + 1 + strlen(DEVCONFIG) + 1;
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| 252 | if ((s = (char *)malloc(len)) == NULL) {
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| 253 | (void) fprintf(stderr, "%s: no space for %s name\n",
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| 254 | Pname, DEVCONFIG);
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| 255 | return(1);
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| 256 | }
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| 257 | (void) sprintf(s, "%s/%s", p, DEVCONFIG);
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| 258 | p = s;
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| 259 | }
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| 260 | /*
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| 261 | * Open the configuration file.
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| 262 | */
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| 263 | #ifdef UNIX
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| 264 | if ((fs = fopen(p, "r")) == NULL)
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| 265 | #else
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| 266 | if ((fs = fopen(p, "rt")) == NULL)
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| 267 | #endif
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| 268 | {
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| 269 | (void) fprintf(stderr, "%s: can't open config file: %s\n",
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| 270 | Pname, p);
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| 271 | return(1);
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| 272 | }
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| 273 | *line = ' ';
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| 274 | /*
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| 275 | * Look for a device definition line -- a line that begins with a name.
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| 276 | */
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| 277 | while ( ! feof(fs)) {
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| 278 | if (*line == '\t' || *line == '#' || *line == ' ') {
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| 279 | (void) fgets(line, MAXLINE, fs);
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| 280 | continue;
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| 281 | }
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| 282 | if ((s = strrchr(line, '\n')) != NULL)
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| 283 | *s = '\0';
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| 284 | else
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| 285 | line[MAXLINE-1] = '\0';
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| 286 | /*
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| 287 | * Match device name.
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| 288 | */
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| 289 | if (strcmp(Device, line) != 0) {
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| 290 | (void) fgets(line, MAXLINE, fs);
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| 291 | continue;
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| 292 | }
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| 293 | fd = 1;
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| 294 | /*
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| 295 | * Read the parameter lines for the device.
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| 296 | */
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| 297 | while (fgets(line, MAXLINE, fs) != NULL) {
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| 298 | if (*line == ' ') {
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| 299 | for (i = 1; line[i] == ' '; i++)
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| 300 | ;
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| 301 | } else if (*line == '\t')
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| 302 | i = 1;
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| 303 | else
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| 304 | break;
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| 305 | #if defined(__STDC__)
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| 306 | if ( ! isalpha(line[i])
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| 307 | #else
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| 308 | if ( ! isascii(line[i]) || ! isalpha(line[i])
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| 309 | #endif
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| 310 | || line[i+1] != '=')
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| 311 | break;
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| 312 | if ((s = strrchr(line, '\n')) != NULL)
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| 313 | *s = '\0';
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| 314 | else
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| 315 | line[MAXLINE-1] = '\0';
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| 316 | switch (line[i]) {
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| 317 | /*
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| 318 | * \tb=<bolding_string>
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| 319 | */
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| 320 | case 'b':
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| 321 | if (Fstr.b != NULL) {
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| 322 | (void) fprintf(stderr,
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| 323 | "%s: dup bold for %s in %s: %s\n",
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| 324 | Pname, Device, p, line);
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| 325 | (void) free(Fstr.b);
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| 326 | Fstr.b = NULL;
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| 327 | }
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| 328 | if ((Fstr.b = Convstr(&line[i+2], &Fstr.bl))
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| 329 | == NULL)
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| 330 | err++;
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| 331 | break;
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| 332 | /*
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| 333 | * \ti=<italicization_string>
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| 334 | */
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| 335 | case 'i':
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| 336 | if (Fstr.it != NULL) {
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| 337 | (void) fprintf(stderr,
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| 338 | "%s: dup italic for %s in %s: %s\n",
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| 339 | Pname, Device, p, line);
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| 340 | (void) free(Fstr.it);
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| 341 | Fstr.it = NULL;
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| 342 | }
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| 343 | if ((Fstr.it = Convstr(&line[i+2], &Fstr.itl))
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| 344 | == NULL)
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| 345 | err++;
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| 346 | break;
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| 347 | /*
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| 348 | * \tr=<return_to_Roman_string>
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| 349 | */
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| 350 | case 'r':
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| 351 | if (Fstr.r != NULL) {
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| 352 | (void) fprintf(stderr,
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| 353 | "%s: dup roman for %s in %s: %s\n",
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| 354 | Pname, Device, p, line);
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| 355 | (void) free(Fstr.r);
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| 356 | Fstr.r = NULL;
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| 357 | }
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| 358 | if ((Fstr.r = Convstr(&line[i+2], &Fstr.rl))
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| 359 | == NULL)
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| 360 | err++;
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| 361 | break;
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| 362 | /*
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| 363 | * \tf=<font_name>=<font_initialization_string>
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| 364 | */
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| 365 | case 'f':
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| 366 | if ( ! Devfont || Fstr.i)
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| 367 | break;
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| 368 | if ((i = Convfont(Device, &line[i+2], &fn, &fi))
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| 369 | < 0)
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| 370 | err++;
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| 371 | else if (fn && strcmp(Devfont, fn) == 0) {
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| 372 | Fstr.i = fi;
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| 373 | Fstr.il = i;
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| 374 | fi = NULL;
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| 375 | }
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| 376 | if (fn) {
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| 377 | (void) free(fn);
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| 378 | fn = NULL;
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| 379 | }
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| 380 | if (fi) {
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| 381 | (void) free((char *)fi);
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| 382 | fi = NULL;
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| 383 | }
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| 384 | break;
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| 385 | /*
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| 386 | * ????
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| 387 | */
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| 388 | default:
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| 389 | (void) fprintf(stderr,
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| 390 | "%s: unknown device %s line: %s\n",
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| 391 | Pname, Device, line);
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| 392 | err++;
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| 393 | }
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| 394 | }
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| 395 | break;
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| 396 | }
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| 397 | (void) fclose(fs);
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| 398 | if (err)
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| 399 | return(1);
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| 400 | /*
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| 401 | * See if the device stanza was located and the font exists.
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| 402 | */
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| 403 | if ( ! fd) {
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| 404 | (void) fprintf(stderr, "%s: can't find device %s in %s\n",
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| 405 | Pname, Device, p);
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| 406 | return(1);
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| 407 | }
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| 408 | if (Devfont && ! Fstr.i) {
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| 409 | (void) fprintf(stderr,
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| 410 | "%s: font %s for device %s not found in %s\n",
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| 411 | Pname, Devfont, Device, p);
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| 412 | return(1);
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| 413 | }
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| 414 | return(0);
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| 415 | }
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