1 /*
2 Copyright 2005-2014 Han The Thanh, <thanh@pdftex.org>
3
4 This file is part of pdfTeX.
5
6 pdfTeX is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 pdfTeX is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License along
17 with this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include "ptexlib.h"
21 #include <string.h>
22
23 static struct avl_table *sfd_tree = NULL;
24
25 #define SFD_BUF_SIZE SMALL_BUF_SIZE
26 #define sfd_getchar() getc(sfd_file)
27 #define sfd_eof() feof(sfd_file)
28 #define sfd_close() xfclose(sfd_file, cur_file_name)
29 #define sfd_open() open_input(&sfd_file, kpse_sfd_format, FOPEN_RBIN_MODE)
30 static FILE *sfd_file;
31 static char sfd_line[SFD_BUF_SIZE];
32
new_subfont_entry(void)33 static subfont_entry *new_subfont_entry(void)
34 {
35 int i;
36 subfont_entry *subfont;
37 subfont = xtalloc(1, subfont_entry);
38 subfont->infix = NULL;
39 for (i = 0; i < 256; i++)
40 subfont->charcodes[i] = -1; /* unassigned */
41 subfont->next = NULL;
42 return subfont;
43 }
44
new_sfd_entry(void)45 static sfd_entry *new_sfd_entry(void)
46 {
47 sfd_entry *sfd;
48 sfd = xtalloc(1, sfd_entry);
49 sfd->name = NULL;
50 sfd->subfont = NULL;
51 return sfd;
52 }
53
destroy_sfd_entry(void * pa,void * pb)54 static void destroy_sfd_entry(void *pa, void *pb)
55 {
56 subfont_entry *p, *q;
57 sfd_entry *sfd;
58 sfd = (sfd_entry *) pa;
59 p = sfd->subfont;
60 while (p != NULL) {
61 q = p->next;
62 xfree(p->infix);
63 xfree(p);
64 p = q;
65 }
66 xfree(sfd->name);
67 }
68
comp_sfd_entry(const void * pa,const void * pb,void * p)69 static int comp_sfd_entry(const void *pa, const void *pb, void *p)
70 {
71 return strcmp(((const sfd_entry *) pa)->name,
72 ((const sfd_entry *) pb)->name);
73 }
74
sfd_free(void)75 void sfd_free(void)
76 {
77 if (sfd_tree != NULL)
78 avl_destroy(sfd_tree, destroy_sfd_entry);
79 }
80
sfd_getline(boolean expect_eof)81 static void sfd_getline(boolean expect_eof)
82 {
83 char *p;
84 int c;
85 restart:
86 if (sfd_eof()) {
87 if (expect_eof)
88 return;
89 else
90 pdftex_fail("unexpected end of file");
91 }
92 p = sfd_line;
93 do {
94 c = sfd_getchar();
95 append_char_to_buf(c, p, sfd_line, SFD_BUF_SIZE);
96 } while (c != 10);
97 append_eol(p, sfd_line, SFD_BUF_SIZE);
98 if (p - sfd_line < 2 || *sfd_line == '#')
99 goto restart;
100 }
101
read_sfd(char * sfd_name)102 static sfd_entry *read_sfd(char *sfd_name)
103 {
104 void **aa;
105 sfd_entry *sfd, tmp_sfd;
106 subfont_entry *sf;
107 char buf[SMALL_BUF_SIZE], *p;
108 long int i, j, k;
109 int n;
110 /* check whether this sfd has been read */
111 tmp_sfd.name = sfd_name;
112 if (sfd_tree == NULL) {
113 sfd_tree = avl_create(comp_sfd_entry, NULL, &avl_xallocator);
114 assert(sfd_tree != NULL);
115 }
116 sfd = (sfd_entry *) avl_find(sfd_tree, &tmp_sfd);
117 if (sfd != NULL)
118 return sfd;
119 set_cur_file_name(sfd_name);
120 if (!sfd_open()) {
121 pdftex_warn("cannot open SFD file for reading");
122 cur_file_name = NULL;
123 return NULL;
124 }
125 tex_printf("{");
126 tex_printf("%s", cur_file_name);
127 sfd = new_sfd_entry();
128 sfd->name = xstrdup(sfd_name);
129 while (!sfd_eof()) {
130 sfd_getline(true);
131 if (*sfd_line == 10) /* empty line indicating eof */
132 break;
133 sf = new_subfont_entry();
134 sf->next = sfd->subfont;
135 sfd->subfont = sf;
136 sscanf(sfd_line, "%s %n", buf, &n);
137 sf->infix = xstrdup(buf);
138 p = sfd_line + n; /* skip to the next word */
139 k = 0;
140 read_ranges:
141 for (;;) {
142 if (*p == '\\') { /* continue on next line */
143 sfd_getline(false);
144 p = sfd_line;
145 goto read_ranges;
146 } else if (*p == 0) /* end of subfont */
147 break;
148 if (sscanf(p, " %li %n", &i, &n) == 0)
149 pdftex_fail("invalid token:\n%s", p);
150 p += n;
151 if (*p == ':') { /* offset */
152 k = i;
153 p++;
154 } else if (*p == '_') { /* range */
155 if (sscanf(p + 1, " %li %n", &j, &n) == 0)
156 pdftex_fail("invalid token:\n%s", p);
157 if (i > j || k + (j - i) > 255)
158 pdftex_fail("invalid range:\n%s", p);
159 while (i <= j)
160 sf->charcodes[k++] = i++;
161 p += n + 1;
162 } else /* codepoint */
163 sf->charcodes[k++] = i;
164 }
165 }
166 sfd_close();
167 tex_printf("}");
168 aa = avl_probe(sfd_tree, sfd);
169 assert(aa != NULL);
170 return sfd;
171 }
172
handle_subfont_fm(fm_entry * fm,int mode)173 boolean handle_subfont_fm(fm_entry * fm, int mode)
174 {
175 size_t l;
176 char *p, *q, *r;
177 sfd_entry *sfd;
178 subfont_entry *sf;
179 fm_entry *fm2;
180 char buf[SMALL_BUF_SIZE];
181 assert(fm->tfm_name != NULL);
182
183 p = fm->tfm_name;
184 q = strchr(p, '@'); /* search for the first '@' */
185 if (q == NULL)
186 return false;
187 r = strchr(q + 1, '@'); /* search for the second '@' */
188 if (r == NULL)
189 return false;
190 if (q <= p || r <= q + 1 /* prefix or sfd name is empty */
191 || r - p != strlen(p) - 1) /* or the second '@' is not the last char yet */
192 return false;
193 l = r - (q + 1); /* length of sfd name */
194 strncpy(buf, q + 1, l);
195 buf[l] = 0;
196 check_buf(strlen(buf) + 4, SMALL_BUF_SIZE);
197 strcat(buf, ".sfd");
198 sfd = read_sfd(buf);
199 if (sfd == NULL)
200 return false;
201
202 /* at this point we know fm is a subfont */
203 set_subfont(fm);
204 xfree(fm->ps_name);
205 fm->ps_name = NULL;
206 /* set default values for PidEid */
207 if (fm->pid == -1) {
208 fm->pid = 3;
209 fm->eid = 1;
210 }
211 l = q - p; /* length of base tfm name (prefix) */
212 for (sf = sfd->subfont; sf != NULL; sf = sf->next) {
213 strncpy(buf, p, l);
214 buf[l] = 0;
215 strcat(buf, sf->infix);
216 fm2 = new_fm_entry();
217 fm2->tfm_name = xstrdup(buf);
218 fm2->ff_name = xstrdup(fm->ff_name);
219 fm2->type = fm->type;
220 fm2->pid = fm->pid;
221 fm2->eid = fm->eid;
222 fm2->subfont = sf;
223 if (avl_do_entry(fm2, mode) != 0) /* try to insert the entry */
224 delete_fm_entry(fm2); /* delete it if failed */
225 }
226 delete_fm_entry(fm);
227 return true;
228 }
229