1 /*
2 * conmakehash.c
3 *
4 * Create arrays for initializing the kernel folded tables (using a hash
5 * table turned out to be to limiting...) Unfortunately we can't simply
6 * preinitialize the tables at compile time since kfree() cannot accept
7 * memory not allocated by kmalloc(), and doing our own memory management
8 * just for this seems like massive overkill.
9 *
10 * Copyright (C) 1995-1997 H. Peter Anvin
11 *
12 * This program is a part of the Linux kernel, and may be freely
13 * copied under the terms of the GNU General Public License (GPL),
14 * version 2, or at your option any later version.
15 */
16
17 #include <stdio.h>
18 #include <stdlib.h>
19 #include <sysexits.h>
20 #include <string.h>
21 #include <ctype.h>
22
23 #define MAX_FONTLEN 256
24
25 typedef unsigned short unicode;
26
usage(char * argv0)27 static void usage(char *argv0)
28 {
29 fprintf(stderr, "Usage: \n"
30 " %s chartable [hashsize] [hashstep] [maxhashlevel]\n", argv0);
31 exit(EX_USAGE);
32 }
33
getunicode(char ** p0)34 static int getunicode(char **p0)
35 {
36 char *p = *p0;
37
38 while (*p == ' ' || *p == '\t')
39 p++;
40 if (*p != 'U' || p[1] != '+' ||
41 !isxdigit(p[2]) || !isxdigit(p[3]) || !isxdigit(p[4]) ||
42 !isxdigit(p[5]) || isxdigit(p[6]))
43 return -1;
44 *p0 = p+6;
45 return strtol(p+2,0,16);
46 }
47
48 unicode unitable[MAX_FONTLEN][255];
49 /* Massive overkill, but who cares? */
50 int unicount[MAX_FONTLEN];
51
addpair(int fp,int un)52 static void addpair(int fp, int un)
53 {
54 int i;
55
56 if ( un <= 0xfffe )
57 {
58 /* Check it isn't a duplicate */
59
60 for ( i = 0 ; i < unicount[fp] ; i++ )
61 if ( unitable[fp][i] == un )
62 return;
63
64 /* Add to list */
65
66 if ( unicount[fp] > 254 )
67 {
68 fprintf(stderr, "ERROR: Only 255 unicodes/glyph permitted!\n");
69 exit(EX_DATAERR);
70 }
71
72 unitable[fp][unicount[fp]] = un;
73 unicount[fp]++;
74 }
75
76 /* otherwise: ignore */
77 }
78
main(int argc,char * argv[])79 int main(int argc, char *argv[])
80 {
81 FILE *ctbl;
82 char *tblname;
83 char buffer[65536];
84 int fontlen;
85 int i, nuni, nent;
86 int fp0, fp1, un0, un1;
87 char *p, *p1;
88
89 if ( argc < 2 || argc > 5 )
90 usage(argv[0]);
91
92 if ( !strcmp(argv[1],"-") )
93 {
94 ctbl = stdin;
95 tblname = "stdin";
96 }
97 else
98 {
99 ctbl = fopen(tblname = argv[1], "r");
100 if ( !ctbl )
101 {
102 perror(tblname);
103 exit(EX_NOINPUT);
104 }
105 }
106
107 /* For now we assume the default font is always 256 characters. */
108 fontlen = 256;
109
110 /* Initialize table */
111
112 for ( i = 0 ; i < fontlen ; i++ )
113 unicount[i] = 0;
114
115 /* Now we come to the tricky part. Parse the input table. */
116
117 while ( fgets(buffer, sizeof(buffer), ctbl) != NULL )
118 {
119 if ( (p = strchr(buffer, '\n')) != NULL )
120 *p = '\0';
121 else
122 fprintf(stderr, "%s: Warning: line too long\n", tblname);
123
124 p = buffer;
125
126 /*
127 * Syntax accepted:
128 * <fontpos> <unicode> <unicode> ...
129 * <range> idem
130 * <range> <unicode range>
131 *
132 * where <range> ::= <fontpos>-<fontpos>
133 * and <unicode> ::= U+<h><h><h><h>
134 * and <h> ::= <hexadecimal digit>
135 */
136
137 while (*p == ' ' || *p == '\t')
138 p++;
139 if (!*p || *p == '#')
140 continue; /* skip comment or blank line */
141
142 fp0 = strtol(p, &p1, 0);
143 if (p1 == p)
144 {
145 fprintf(stderr, "Bad input line: %s\n", buffer);
146 exit(EX_DATAERR);
147 }
148 p = p1;
149
150 while (*p == ' ' || *p == '\t')
151 p++;
152 if (*p == '-')
153 {
154 p++;
155 fp1 = strtol(p, &p1, 0);
156 if (p1 == p)
157 {
158 fprintf(stderr, "Bad input line: %s\n", buffer);
159 exit(EX_DATAERR);
160 }
161 p = p1;
162 }
163 else
164 fp1 = 0;
165
166 if ( fp0 < 0 || fp0 >= fontlen )
167 {
168 fprintf(stderr,
169 "%s: Glyph number (0x%x) larger than font length\n",
170 tblname, fp0);
171 exit(EX_DATAERR);
172 }
173 if ( fp1 && (fp1 < fp0 || fp1 >= fontlen) )
174 {
175 fprintf(stderr,
176 "%s: Bad end of range (0x%x)\n",
177 tblname, fp1);
178 exit(EX_DATAERR);
179 }
180
181 if (fp1)
182 {
183 /* we have a range; expect the word "idem" or a Unicode range of the
184 same length */
185 while (*p == ' ' || *p == '\t')
186 p++;
187 if (!strncmp(p, "idem", 4))
188 {
189 for (i=fp0; i<=fp1; i++)
190 addpair(i,i);
191 p += 4;
192 }
193 else
194 {
195 un0 = getunicode(&p);
196 while (*p == ' ' || *p == '\t')
197 p++;
198 if (*p != '-')
199 {
200 fprintf(stderr,
201 "%s: Corresponding to a range of font positions, there should be a Unicode range\n",
202 tblname);
203 exit(EX_DATAERR);
204 }
205 p++;
206 un1 = getunicode(&p);
207 if (un0 < 0 || un1 < 0)
208 {
209 fprintf(stderr,
210 "%s: Bad Unicode range corresponding to font position range 0x%x-0x%x\n",
211 tblname, fp0, fp1);
212 exit(EX_DATAERR);
213 }
214 if (un1 - un0 != fp1 - fp0)
215 {
216 fprintf(stderr,
217 "%s: Unicode range U+%x-U+%x not of the same length as font position range 0x%x-0x%x\n",
218 tblname, un0, un1, fp0, fp1);
219 exit(EX_DATAERR);
220 }
221 for(i=fp0; i<=fp1; i++)
222 addpair(i,un0-fp0+i);
223 }
224 }
225 else
226 {
227 /* no range; expect a list of unicode values for a single font position */
228
229 while ( (un0 = getunicode(&p)) >= 0 )
230 addpair(fp0, un0);
231 }
232 while (*p == ' ' || *p == '\t')
233 p++;
234 if (*p && *p != '#')
235 fprintf(stderr, "%s: trailing junk (%s) ignored\n", tblname, p);
236 }
237
238 /* Okay, we hit EOF, now output hash table */
239
240 fclose(ctbl);
241
242
243 /* Compute total size of Unicode list */
244 nuni = 0;
245 for ( i = 0 ; i < fontlen ; i++ )
246 nuni += unicount[i];
247
248 printf("\
249 /*\n\
250 * Do not edit this file; it was automatically generated by\n\
251 *\n\
252 * conmakehash %s > [this file]\n\
253 *\n\
254 */\n\
255 \n\
256 #include <linux/types.h>\n\
257 \n\
258 u8 dfont_unicount[%d] = \n\
259 {\n\t", argv[1], fontlen);
260
261 for ( i = 0 ; i < fontlen ; i++ )
262 {
263 printf("%3d", unicount[i]);
264 if ( i == fontlen-1 )
265 printf("\n};\n");
266 else if ( i % 8 == 7 )
267 printf(",\n\t");
268 else
269 printf(", ");
270 }
271
272 printf("\nu16 dfont_unitable[%d] = \n{\n\t", nuni);
273
274 fp0 = 0;
275 nent = 0;
276 for ( i = 0 ; i < nuni ; i++ )
277 {
278 while ( nent >= unicount[fp0] )
279 {
280 fp0++;
281 nent = 0;
282 }
283 printf("0x%04x", unitable[fp0][nent++]);
284 if ( i == nuni-1 )
285 printf("\n};\n");
286 else if ( i % 8 == 7 )
287 printf(",\n\t");
288 else
289 printf(", ");
290 }
291
292 exit(EX_OK);
293 }
294