projects/linux·blob v5.2 · refs

290 lines · 5.8 KiB

1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * conmakehash.c
4 *
5 * Create arrays for initializing the kernel folded tables (using a hash
6 * table turned out to be to limiting...) Unfortunately we can't simply
7 * preinitialize the tables at compile time since kfree() cannot accept
8 * memory not allocated by kmalloc(), and doing our own memory management
9 * just for this seems like massive overkill.
10 *
11 * Copyright (C) 1995-1997 H. Peter Anvin
12 */
13
14#include <stdio.h>
15#include <stdlib.h>
16#include <sysexits.h>
17#include <string.h>
18#include <ctype.h>
19
20#define MAX_FONTLEN 256
21
22typedef unsigned short unicode;
23
24static void usage(char *argv0)
25{
26 fprintf(stderr, "Usage: \n"
27 " %s chartable [hashsize] [hashstep] [maxhashlevel]\n", argv0);
28 exit(EX_USAGE);
29}
30
31static int getunicode(char **p0)
32{
33 char *p = *p0;
34
35 while (*p == ' ' || *p == '\t')
36 p++;
37 if (*p != 'U' || p[1] != '+' ||
38 !isxdigit(p[2]) || !isxdigit(p[3]) || !isxdigit(p[4]) ||
39 !isxdigit(p[5]) || isxdigit(p[6]))
40 return -1;
41 *p0 = p+6;
42 return strtol(p+2,0,16);
43}
44
45unicode unitable[MAX_FONTLEN][255];
46 /* Massive overkill, but who cares? */
47int unicount[MAX_FONTLEN];
48
49static void addpair(int fp, int un)
50{
51 int i;
52
53 if ( un <= 0xfffe )
54 {
55 /* Check it isn't a duplicate */
56
57 for ( i = 0 ; i < unicount[fp] ; i++ )
58 if ( unitable[fp][i] == un )
59 return;
60
61 /* Add to list */
62
63 if ( unicount[fp] > 254 )
64 {
65 fprintf(stderr, "ERROR: Only 255 unicodes/glyph permitted!\n");
66 exit(EX_DATAERR);
67 }
68
69 unitable[fp][unicount[fp]] = un;
70 unicount[fp]++;
71 }
72
73 /* otherwise: ignore */
74}
75
76int main(int argc, char *argv[])
77{
78 FILE *ctbl;
79 char *tblname;
80 char buffer[65536];
81 int fontlen;
82 int i, nuni, nent;
83 int fp0, fp1, un0, un1;
84 char *p, *p1;
85
86 if ( argc < 2 || argc > 5 )
87 usage(argv[0]);
88
89 if ( !strcmp(argv[1],"-") )
90 {
91 ctbl = stdin;
92 tblname = "stdin";
93 }
94 else
95 {
96 ctbl = fopen(tblname = argv[1], "r");
97 if ( !ctbl )
98 {
99 perror(tblname);
100 exit(EX_NOINPUT);
101 }
102 }
103
104 /* For now we assume the default font is always 256 characters. */
105 fontlen = 256;
106
107 /* Initialize table */
108
109 for ( i = 0 ; i < fontlen ; i++ )
110 unicount[i] = 0;
111
112 /* Now we come to the tricky part. Parse the input table. */
113
114 while ( fgets(buffer, sizeof(buffer), ctbl) != NULL )
115 {
116 if ( (p = strchr(buffer, '\n')) != NULL )
117 *p = '\0';
118 else
119 fprintf(stderr, "%s: Warning: line too long\n", tblname);
120
121 p = buffer;
122
123/*
124 * Syntax accepted:
125 * <fontpos> <unicode> <unicode> ...
126 * <range> idem
127 * <range> <unicode range>
128 *
129 * where <range> ::= <fontpos>-<fontpos>
130 * and <unicode> ::= U+<h><h><h><h>
131 * and <h> ::= <hexadecimal digit>
132 */
133
134 while (*p == ' ' || *p == '\t')
135 p++;
136 if (!*p || *p == '#')
137 continue; /* skip comment or blank line */
138
139 fp0 = strtol(p, &p1, 0);
140 if (p1 == p)
141 {
142 fprintf(stderr, "Bad input line: %s\n", buffer);
143 exit(EX_DATAERR);
144 }
145 p = p1;
146
147 while (*p == ' ' || *p == '\t')
148 p++;
149 if (*p == '-')
150 {
151 p++;
152 fp1 = strtol(p, &p1, 0);
153 if (p1 == p)
154 {
155 fprintf(stderr, "Bad input line: %s\n", buffer);
156 exit(EX_DATAERR);
157 }
158 p = p1;
159 }
160 else
161 fp1 = 0;
162
163 if ( fp0 < 0 || fp0 >= fontlen )
164 {
165 fprintf(stderr,
166 "%s: Glyph number (0x%x) larger than font length\n",
167 tblname, fp0);
168 exit(EX_DATAERR);
169 }
170 if ( fp1 && (fp1 < fp0 || fp1 >= fontlen) )
171 {
172 fprintf(stderr,
173 "%s: Bad end of range (0x%x)\n",
174 tblname, fp1);
175 exit(EX_DATAERR);
176 }
177
178 if (fp1)
179 {
180 /* we have a range; expect the word "idem" or a Unicode range of the
181 same length */
182 while (*p == ' ' || *p == '\t')
183 p++;
184 if (!strncmp(p, "idem", 4))
185 {
186 for (i=fp0; i<=fp1; i++)
187 addpair(i,i);
188 p += 4;
189 }
190 else
191 {
192 un0 = getunicode(&p);
193 while (*p == ' ' || *p == '\t')
194 p++;
195 if (*p != '-')
196 {
197 fprintf(stderr,
198"%s: Corresponding to a range of font positions, there should be a Unicode range\n",
199 tblname);
200 exit(EX_DATAERR);
201 }
202 p++;
203 un1 = getunicode(&p);
204 if (un0 < 0 || un1 < 0)
205 {
206 fprintf(stderr,
207"%s: Bad Unicode range corresponding to font position range 0x%x-0x%x\n",
208 tblname, fp0, fp1);
209 exit(EX_DATAERR);
210 }
211 if (un1 - un0 != fp1 - fp0)
212 {
213 fprintf(stderr,
214"%s: Unicode range U+%x-U+%x not of the same length as font position range 0x%x-0x%x\n",
215 tblname, un0, un1, fp0, fp1);
216 exit(EX_DATAERR);
217 }
218 for(i=fp0; i<=fp1; i++)
219 addpair(i,un0-fp0+i);
220 }
221 }
222 else
223 {
224 /* no range; expect a list of unicode values for a single font position */
225
226 while ( (un0 = getunicode(&p)) >= 0 )
227 addpair(fp0, un0);
228 }
229 while (*p == ' ' || *p == '\t')
230 p++;
231 if (*p && *p != '#')
232 fprintf(stderr, "%s: trailing junk (%s) ignored\n", tblname, p);
233 }
234
235 /* Okay, we hit EOF, now output hash table */
236
237 fclose(ctbl);
238
239
240 /* Compute total size of Unicode list */
241 nuni = 0;
242 for ( i = 0 ; i < fontlen ; i++ )
243 nuni += unicount[i];
244
245 printf("\
246/*\n\
247 * Do not edit this file; it was automatically generated by\n\
248 *\n\
249 * conmakehash %s > [this file]\n\
250 *\n\
251 */\n\
252\n\
253#include <linux/types.h>\n\
254\n\
255u8 dfont_unicount[%d] = \n\
256{\n\t", argv[1], fontlen);
257
258 for ( i = 0 ; i < fontlen ; i++ )
259 {
260 printf("%3d", unicount[i]);
261 if ( i == fontlen-1 )
262 printf("\n};\n");
263 else if ( i % 8 == 7 )
264 printf(",\n\t");
265 else
266 printf(", ");
267 }
268
269 printf("\nu16 dfont_unitable[%d] = \n{\n\t", nuni);
270
271 fp0 = 0;
272 nent = 0;
273 for ( i = 0 ; i < nuni ; i++ )
274 {
275 while ( nent >= unicount[fp0] )
276 {
277 fp0++;
278 nent = 0;
279 }
280 printf("0x%04x", unitable[fp0][nent++]);
281 if ( i == nuni-1 )
282 printf("\n};\n");
283 else if ( i % 8 == 7 )
284 printf(",\n\t");
285 else
286 printf(", ");
287 }
288
289 exit(EX_OK);
290}