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e0dd62f6 RM |
1 | /* Merge parameters into a termcap entry string. |
2 | Copyright (C) 1985, 1987, 1993 Free Software Foundation, Inc. | |
3 | ||
4 | This program is free software; you can redistribute it and/or modify | |
5 | it under the terms of the GNU General Public License as published by | |
6 | the Free Software Foundation; either version 2, or (at your option) | |
7 | any later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU General Public License | |
15 | along with this program; see the file COPYING. If not, write to | |
16 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
17 | ||
18 | /* Emacs config.h may rename various library functions such as malloc. */ | |
19 | #ifdef HAVE_CONFIG_H | |
20 | #include <config.h> | |
21 | #else /* not HAVE_CONFIG_H */ | |
22 | ||
23 | #if defined(HAVE_STRING_H) || defined(STDC_HEADERS) | |
24 | #define bcopy(s, d, n) memcpy ((d), (s), (n)) | |
25 | #endif | |
26 | ||
27 | #ifdef STDC_HEADERS | |
28 | #include <stdlib.h> | |
29 | #include <string.h> | |
30 | #else | |
31 | char *malloc (); | |
32 | char *realloc (); | |
33 | #endif | |
34 | ||
35 | #endif /* not HAVE_CONFIG_H */ | |
36 | ||
37 | #ifndef NULL | |
38 | #define NULL (char *) 0 | |
39 | #endif | |
40 | \f | |
41 | #ifndef emacs | |
42 | static void | |
43 | memory_out () | |
44 | { | |
45 | write (2, "virtual memory exhausted\n", 25); | |
46 | exit (1); | |
47 | } | |
48 | ||
49 | static char * | |
50 | xmalloc (size) | |
51 | unsigned size; | |
52 | { | |
53 | register char *tem = malloc (size); | |
54 | ||
55 | if (!tem) | |
56 | memory_out (); | |
57 | return tem; | |
58 | } | |
59 | ||
60 | static char * | |
61 | xrealloc (ptr, size) | |
62 | char *ptr; | |
63 | unsigned size; | |
64 | { | |
65 | register char *tem = realloc (ptr, size); | |
66 | ||
67 | if (!tem) | |
68 | memory_out (); | |
69 | return tem; | |
70 | } | |
71 | #endif /* not emacs */ | |
72 | \f | |
73 | /* Assuming STRING is the value of a termcap string entry | |
74 | containing `%' constructs to expand parameters, | |
75 | merge in parameter values and store result in block OUTSTRING points to. | |
76 | LEN is the length of OUTSTRING. If more space is needed, | |
77 | a block is allocated with `malloc'. | |
78 | ||
79 | The value returned is the address of the resulting string. | |
80 | This may be OUTSTRING or may be the address of a block got with `malloc'. | |
81 | In the latter case, the caller must free the block. | |
82 | ||
83 | The fourth and following args to tparam serve as the parameter values. */ | |
84 | ||
85 | static char *tparam1 (); | |
86 | ||
87 | /* VARARGS 2 */ | |
88 | char * | |
89 | tparam (string, outstring, len, arg0, arg1, arg2, arg3) | |
90 | char *string; | |
91 | char *outstring; | |
92 | int len; | |
93 | int arg0, arg1, arg2, arg3; | |
94 | { | |
95 | #ifdef NO_ARG_ARRAY | |
96 | int arg[4]; | |
97 | arg[0] = arg0; | |
98 | arg[1] = arg1; | |
99 | arg[2] = arg2; | |
100 | arg[3] = arg3; | |
101 | return tparam1 (string, outstring, len, NULL, NULL, arg); | |
102 | #else | |
103 | return tparam1 (string, outstring, len, NULL, NULL, &arg0); | |
104 | #endif | |
105 | } | |
106 | ||
107 | char *BC; | |
108 | char *UP; | |
109 | ||
110 | static char tgoto_buf[50]; | |
111 | ||
112 | char * | |
113 | tgoto (cm, hpos, vpos) | |
114 | char *cm; | |
115 | int hpos, vpos; | |
116 | { | |
117 | int args[2]; | |
118 | if (!cm) | |
119 | return NULL; | |
120 | args[0] = vpos; | |
121 | args[1] = hpos; | |
122 | return tparam1 (cm, tgoto_buf, 50, UP, BC, args); | |
123 | } | |
124 | ||
125 | static char * | |
126 | tparam1 (string, outstring, len, up, left, argp) | |
127 | char *string; | |
128 | char *outstring; | |
129 | int len; | |
130 | char *up, *left; | |
131 | register int *argp; | |
132 | { | |
133 | register int c; | |
134 | register char *p = string; | |
135 | register char *op = outstring; | |
136 | char *outend; | |
137 | int outlen = 0; | |
138 | ||
139 | register int tem; | |
140 | int *old_argp = argp; | |
141 | int doleft = 0; | |
142 | int doup = 0; | |
143 | ||
144 | outend = outstring + len; | |
145 | ||
146 | while (1) | |
147 | { | |
148 | /* If the buffer might be too short, make it bigger. */ | |
149 | if (op + 5 >= outend) | |
150 | { | |
151 | register char *new; | |
152 | if (outlen == 0) | |
153 | { | |
154 | outlen = len + 40; | |
155 | new = (char *) xmalloc (outlen); | |
156 | outend += 40; | |
157 | bcopy (outstring, new, op - outstring); | |
158 | } | |
159 | else | |
160 | { | |
161 | outend += outlen; | |
162 | outlen *= 2; | |
163 | new = (char *) xrealloc (outstring, outlen); | |
164 | } | |
165 | op += new - outstring; | |
166 | outend += new - outstring; | |
167 | outstring = new; | |
168 | } | |
169 | c = *p++; | |
170 | if (!c) | |
171 | break; | |
172 | if (c == '%') | |
173 | { | |
174 | c = *p++; | |
175 | tem = *argp; | |
176 | switch (c) | |
177 | { | |
178 | case 'd': /* %d means output in decimal. */ | |
179 | if (tem < 10) | |
180 | goto onedigit; | |
181 | if (tem < 100) | |
182 | goto twodigit; | |
183 | case '3': /* %3 means output in decimal, 3 digits. */ | |
184 | if (tem > 999) | |
185 | { | |
186 | *op++ = tem / 1000 + '0'; | |
187 | tem %= 1000; | |
188 | } | |
189 | *op++ = tem / 100 + '0'; | |
190 | case '2': /* %2 means output in decimal, 2 digits. */ | |
191 | twodigit: | |
192 | tem %= 100; | |
193 | *op++ = tem / 10 + '0'; | |
194 | onedigit: | |
195 | *op++ = tem % 10 + '0'; | |
196 | argp++; | |
197 | break; | |
198 | ||
199 | case 'C': | |
200 | /* For c-100: print quotient of value by 96, if nonzero, | |
201 | then do like %+. */ | |
202 | if (tem >= 96) | |
203 | { | |
204 | *op++ = tem / 96; | |
205 | tem %= 96; | |
206 | } | |
207 | case '+': /* %+x means add character code of char x. */ | |
208 | tem += *p++; | |
209 | case '.': /* %. means output as character. */ | |
210 | if (left) | |
211 | { | |
212 | /* If want to forbid output of 0 and \n and \t, | |
213 | and this is one of them, increment it. */ | |
214 | while (tem == 0 || tem == '\n' || tem == '\t') | |
215 | { | |
216 | tem++; | |
217 | if (argp == old_argp) | |
218 | doup++, outend -= strlen (up); | |
219 | else | |
220 | doleft++, outend -= strlen (left); | |
221 | } | |
222 | } | |
223 | *op++ = tem ? tem : 0200; | |
224 | case 'f': /* %f means discard next arg. */ | |
225 | argp++; | |
226 | break; | |
227 | ||
228 | case 'b': /* %b means back up one arg (and re-use it). */ | |
229 | argp--; | |
230 | break; | |
231 | ||
232 | case 'r': /* %r means interchange following two args. */ | |
233 | argp[0] = argp[1]; | |
234 | argp[1] = tem; | |
235 | old_argp++; | |
236 | break; | |
237 | ||
238 | case '>': /* %>xy means if arg is > char code of x, */ | |
239 | if (argp[0] > *p++) /* then add char code of y to the arg, */ | |
240 | argp[0] += *p; /* and in any case don't output. */ | |
241 | p++; /* Leave the arg to be output later. */ | |
242 | break; | |
243 | ||
244 | case 'a': /* %a means arithmetic. */ | |
245 | /* Next character says what operation. | |
246 | Add or subtract either a constant or some other arg. */ | |
247 | /* First following character is + to add or - to subtract | |
248 | or = to assign. */ | |
249 | /* Next following char is 'p' and an arg spec | |
250 | (0100 plus position of that arg relative to this one) | |
251 | or 'c' and a constant stored in a character. */ | |
252 | tem = p[2] & 0177; | |
253 | if (p[1] == 'p') | |
254 | tem = argp[tem - 0100]; | |
255 | if (p[0] == '-') | |
256 | argp[0] -= tem; | |
257 | else if (p[0] == '+') | |
258 | argp[0] += tem; | |
259 | else if (p[0] == '*') | |
260 | argp[0] *= tem; | |
261 | else if (p[0] == '/') | |
262 | argp[0] /= tem; | |
263 | else | |
264 | argp[0] = tem; | |
265 | ||
266 | p += 3; | |
267 | break; | |
268 | ||
269 | case 'i': /* %i means add one to arg, */ | |
270 | argp[0] ++; /* and leave it to be output later. */ | |
271 | argp[1] ++; /* Increment the following arg, too! */ | |
272 | break; | |
273 | ||
274 | case '%': /* %% means output %; no arg. */ | |
275 | goto ordinary; | |
276 | ||
277 | case 'n': /* %n means xor each of next two args with 140. */ | |
278 | argp[0] ^= 0140; | |
279 | argp[1] ^= 0140; | |
280 | break; | |
281 | ||
282 | case 'm': /* %m means xor each of next two args with 177. */ | |
283 | argp[0] ^= 0177; | |
284 | argp[1] ^= 0177; | |
285 | break; | |
286 | ||
287 | case 'B': /* %B means express arg as BCD char code. */ | |
288 | argp[0] += 6 * (tem / 10); | |
289 | break; | |
290 | ||
291 | case 'D': /* %D means weird Delta Data transformation. */ | |
292 | argp[0] -= 2 * (tem % 16); | |
293 | break; | |
294 | } | |
295 | } | |
296 | else | |
297 | /* Ordinary character in the argument string. */ | |
298 | ordinary: | |
299 | *op++ = c; | |
300 | } | |
301 | *op = 0; | |
302 | while (doup-- > 0) | |
303 | strcat (op, up); | |
304 | while (doleft-- > 0) | |
305 | strcat (op, left); | |
306 | return outstring; | |
307 | } | |
308 | \f | |
309 | #ifdef DEBUG | |
310 | ||
311 | main (argc, argv) | |
312 | int argc; | |
313 | char **argv; | |
314 | { | |
315 | char buf[50]; | |
316 | int args[3]; | |
317 | args[0] = atoi (argv[2]); | |
318 | args[1] = atoi (argv[3]); | |
319 | args[2] = atoi (argv[4]); | |
320 | tparam1 (argv[1], buf, "LEFT", "UP", args); | |
321 | printf ("%s\n", buf); | |
322 | return 0; | |
323 | } | |
324 | ||
325 | #endif /* DEBUG */ |