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e0dd62f6 | 1 | /* Merge parameters into a termcap entry string. |
9e3295f9 | 2 | Copyright (C) 1985, 87, 93, 95 Free Software Foundation, Inc. |
e0dd62f6 RM |
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 | |
ba4a8e51 KH |
16 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
17 | Boston, MA 02111-1307, USA. */ | |
e0dd62f6 RM |
18 | |
19 | /* Emacs config.h may rename various library functions such as malloc. */ | |
20 | #ifdef HAVE_CONFIG_H | |
21 | #include <config.h> | |
c70c2705 | 22 | #endif |
e0dd62f6 | 23 | |
83c2ece5 DL |
24 | #ifdef emacs |
25 | #include "lisp.h" /* for xmalloc */ | |
26 | #else | |
e0dd62f6 RM |
27 | #if defined(HAVE_STRING_H) || defined(STDC_HEADERS) |
28 | #define bcopy(s, d, n) memcpy ((d), (s), (n)) | |
29 | #endif | |
30 | ||
31 | #ifdef STDC_HEADERS | |
32 | #include <stdlib.h> | |
33 | #include <string.h> | |
34 | #else | |
35 | char *malloc (); | |
36 | char *realloc (); | |
37 | #endif | |
38 | ||
c70c2705 | 39 | #endif /* not emacs */ |
e0dd62f6 RM |
40 | |
41 | #ifndef NULL | |
42 | #define NULL (char *) 0 | |
43 | #endif | |
44 | \f | |
45 | #ifndef emacs | |
46 | static void | |
47 | memory_out () | |
48 | { | |
49 | write (2, "virtual memory exhausted\n", 25); | |
50 | exit (1); | |
51 | } | |
52 | ||
53 | static char * | |
54 | xmalloc (size) | |
55 | unsigned size; | |
56 | { | |
57 | register char *tem = malloc (size); | |
58 | ||
59 | if (!tem) | |
60 | memory_out (); | |
61 | return tem; | |
62 | } | |
63 | ||
64 | static char * | |
65 | xrealloc (ptr, size) | |
66 | char *ptr; | |
67 | unsigned size; | |
68 | { | |
69 | register char *tem = realloc (ptr, size); | |
70 | ||
71 | if (!tem) | |
72 | memory_out (); | |
73 | return tem; | |
74 | } | |
75 | #endif /* not emacs */ | |
76 | \f | |
77 | /* Assuming STRING is the value of a termcap string entry | |
78 | containing `%' constructs to expand parameters, | |
79 | merge in parameter values and store result in block OUTSTRING points to. | |
80 | LEN is the length of OUTSTRING. If more space is needed, | |
81 | a block is allocated with `malloc'. | |
82 | ||
83 | The value returned is the address of the resulting string. | |
84 | This may be OUTSTRING or may be the address of a block got with `malloc'. | |
85 | In the latter case, the caller must free the block. | |
86 | ||
87 | The fourth and following args to tparam serve as the parameter values. */ | |
88 | ||
89 | static char *tparam1 (); | |
90 | ||
91 | /* VARARGS 2 */ | |
92 | char * | |
93 | tparam (string, outstring, len, arg0, arg1, arg2, arg3) | |
94 | char *string; | |
95 | char *outstring; | |
96 | int len; | |
97 | int arg0, arg1, arg2, arg3; | |
98 | { | |
e0dd62f6 | 99 | int arg[4]; |
9e3295f9 | 100 | |
e0dd62f6 RM |
101 | arg[0] = arg0; |
102 | arg[1] = arg1; | |
103 | arg[2] = arg2; | |
104 | arg[3] = arg3; | |
105 | return tparam1 (string, outstring, len, NULL, NULL, arg); | |
e0dd62f6 RM |
106 | } |
107 | ||
108 | char *BC; | |
109 | char *UP; | |
110 | ||
111 | static char tgoto_buf[50]; | |
112 | ||
113 | char * | |
114 | tgoto (cm, hpos, vpos) | |
115 | char *cm; | |
116 | int hpos, vpos; | |
117 | { | |
118 | int args[2]; | |
119 | if (!cm) | |
120 | return NULL; | |
121 | args[0] = vpos; | |
122 | args[1] = hpos; | |
123 | return tparam1 (cm, tgoto_buf, 50, UP, BC, args); | |
124 | } | |
125 | ||
126 | static char * | |
127 | tparam1 (string, outstring, len, up, left, argp) | |
128 | char *string; | |
129 | char *outstring; | |
130 | int len; | |
131 | char *up, *left; | |
132 | register int *argp; | |
133 | { | |
134 | register int c; | |
135 | register char *p = string; | |
136 | register char *op = outstring; | |
137 | char *outend; | |
138 | int outlen = 0; | |
139 | ||
140 | register int tem; | |
141 | int *old_argp = argp; | |
142 | int doleft = 0; | |
143 | int doup = 0; | |
144 | ||
145 | outend = outstring + len; | |
146 | ||
147 | while (1) | |
148 | { | |
149 | /* If the buffer might be too short, make it bigger. */ | |
150 | if (op + 5 >= outend) | |
151 | { | |
152 | register char *new; | |
153 | if (outlen == 0) | |
154 | { | |
155 | outlen = len + 40; | |
156 | new = (char *) xmalloc (outlen); | |
157 | outend += 40; | |
158 | bcopy (outstring, new, op - outstring); | |
159 | } | |
160 | else | |
161 | { | |
162 | outend += outlen; | |
163 | outlen *= 2; | |
164 | new = (char *) xrealloc (outstring, outlen); | |
165 | } | |
166 | op += new - outstring; | |
167 | outend += new - outstring; | |
168 | outstring = new; | |
169 | } | |
170 | c = *p++; | |
171 | if (!c) | |
172 | break; | |
173 | if (c == '%') | |
174 | { | |
175 | c = *p++; | |
176 | tem = *argp; | |
177 | switch (c) | |
178 | { | |
179 | case 'd': /* %d means output in decimal. */ | |
180 | if (tem < 10) | |
181 | goto onedigit; | |
182 | if (tem < 100) | |
183 | goto twodigit; | |
184 | case '3': /* %3 means output in decimal, 3 digits. */ | |
185 | if (tem > 999) | |
186 | { | |
187 | *op++ = tem / 1000 + '0'; | |
188 | tem %= 1000; | |
189 | } | |
190 | *op++ = tem / 100 + '0'; | |
191 | case '2': /* %2 means output in decimal, 2 digits. */ | |
192 | twodigit: | |
193 | tem %= 100; | |
194 | *op++ = tem / 10 + '0'; | |
195 | onedigit: | |
196 | *op++ = tem % 10 + '0'; | |
197 | argp++; | |
198 | break; | |
199 | ||
200 | case 'C': | |
201 | /* For c-100: print quotient of value by 96, if nonzero, | |
202 | then do like %+. */ | |
203 | if (tem >= 96) | |
204 | { | |
205 | *op++ = tem / 96; | |
206 | tem %= 96; | |
207 | } | |
208 | case '+': /* %+x means add character code of char x. */ | |
209 | tem += *p++; | |
210 | case '.': /* %. means output as character. */ | |
211 | if (left) | |
212 | { | |
213 | /* If want to forbid output of 0 and \n and \t, | |
214 | and this is one of them, increment it. */ | |
215 | while (tem == 0 || tem == '\n' || tem == '\t') | |
216 | { | |
217 | tem++; | |
218 | if (argp == old_argp) | |
219 | doup++, outend -= strlen (up); | |
220 | else | |
221 | doleft++, outend -= strlen (left); | |
222 | } | |
223 | } | |
224 | *op++ = tem ? tem : 0200; | |
225 | case 'f': /* %f means discard next arg. */ | |
226 | argp++; | |
227 | break; | |
228 | ||
229 | case 'b': /* %b means back up one arg (and re-use it). */ | |
230 | argp--; | |
231 | break; | |
232 | ||
233 | case 'r': /* %r means interchange following two args. */ | |
234 | argp[0] = argp[1]; | |
235 | argp[1] = tem; | |
236 | old_argp++; | |
237 | break; | |
238 | ||
239 | case '>': /* %>xy means if arg is > char code of x, */ | |
240 | if (argp[0] > *p++) /* then add char code of y to the arg, */ | |
241 | argp[0] += *p; /* and in any case don't output. */ | |
242 | p++; /* Leave the arg to be output later. */ | |
243 | break; | |
244 | ||
245 | case 'a': /* %a means arithmetic. */ | |
246 | /* Next character says what operation. | |
247 | Add or subtract either a constant or some other arg. */ | |
248 | /* First following character is + to add or - to subtract | |
249 | or = to assign. */ | |
250 | /* Next following char is 'p' and an arg spec | |
251 | (0100 plus position of that arg relative to this one) | |
252 | or 'c' and a constant stored in a character. */ | |
253 | tem = p[2] & 0177; | |
254 | if (p[1] == 'p') | |
255 | tem = argp[tem - 0100]; | |
256 | if (p[0] == '-') | |
257 | argp[0] -= tem; | |
258 | else if (p[0] == '+') | |
259 | argp[0] += tem; | |
260 | else if (p[0] == '*') | |
261 | argp[0] *= tem; | |
262 | else if (p[0] == '/') | |
263 | argp[0] /= tem; | |
264 | else | |
265 | argp[0] = tem; | |
266 | ||
267 | p += 3; | |
268 | break; | |
269 | ||
270 | case 'i': /* %i means add one to arg, */ | |
271 | argp[0] ++; /* and leave it to be output later. */ | |
272 | argp[1] ++; /* Increment the following arg, too! */ | |
273 | break; | |
274 | ||
275 | case '%': /* %% means output %; no arg. */ | |
276 | goto ordinary; | |
277 | ||
278 | case 'n': /* %n means xor each of next two args with 140. */ | |
279 | argp[0] ^= 0140; | |
280 | argp[1] ^= 0140; | |
281 | break; | |
282 | ||
283 | case 'm': /* %m means xor each of next two args with 177. */ | |
284 | argp[0] ^= 0177; | |
285 | argp[1] ^= 0177; | |
286 | break; | |
287 | ||
288 | case 'B': /* %B means express arg as BCD char code. */ | |
289 | argp[0] += 6 * (tem / 10); | |
290 | break; | |
291 | ||
292 | case 'D': /* %D means weird Delta Data transformation. */ | |
293 | argp[0] -= 2 * (tem % 16); | |
294 | break; | |
45e0dd95 GM |
295 | |
296 | default: | |
297 | abort (); | |
e0dd62f6 RM |
298 | } |
299 | } | |
300 | else | |
301 | /* Ordinary character in the argument string. */ | |
302 | ordinary: | |
303 | *op++ = c; | |
304 | } | |
305 | *op = 0; | |
306 | while (doup-- > 0) | |
307 | strcat (op, up); | |
308 | while (doleft-- > 0) | |
309 | strcat (op, left); | |
310 | return outstring; | |
311 | } | |
312 | \f | |
313 | #ifdef DEBUG | |
314 | ||
315 | main (argc, argv) | |
316 | int argc; | |
317 | char **argv; | |
318 | { | |
319 | char buf[50]; | |
320 | int args[3]; | |
321 | args[0] = atoi (argv[2]); | |
322 | args[1] = atoi (argv[3]); | |
323 | args[2] = atoi (argv[4]); | |
324 | tparam1 (argv[1], buf, "LEFT", "UP", args); | |
325 | printf ("%s\n", buf); | |
326 | return 0; | |
327 | } | |
328 | ||
329 | #endif /* DEBUG */ |