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