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comparison src/tparam.c @ 0:376386a54a3c r19-14

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Import from CVS: tag r19-14
author cvs
date Mon, 13 Aug 2007 08:45:50 +0200
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children 74fd4e045ea6
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-1:000000000000 0:376386a54a3c
1 /* Merge parameters into a termcap entry string.
2 Copyright (C) 1985, 1987, 1992, 1993, 1994 Free Software Foundation, Inc.
3
4 This file is part of XEmacs.
5
6 XEmacs is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 2, or (at your option) any
9 later version.
10
11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with XEmacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
20
21 /* Synched up with: Not synched with FSF. */
22
23 /* config.h may rename various library functions such as malloc. */
24 #ifdef emacs
25
26 #include <config.h>
27
28 #include <string.h>
29
30 #define realloc xrealloc
31 #define malloc xmalloc
32 #define free xfree
33 extern void *xmalloc (int size);
34 extern void *xrealloc (void *, int size);
35
36 #else /* emacs */
37
38 #ifdef STDC_HEADERS
39 #include <stdlib.h>
40 #include <string.h>
41 #else
42 extern char *malloc ();
43 extern char *realloc ();
44 #endif
45
46 #endif /* !emacs */
47
48 /* Assuming STRING is the value of a termcap string entry
49 containing `%' constructs to expand parameters,
50 merge in parameter values and store result in block OUTSTRING points to.
51 LEN is the length of OUTSTRING. If more space is needed,
52 a block is allocated with `malloc'.
53
54 The value returned is the address of the resulting string.
55 This may be OUTSTRING or may be the address of a block got with `malloc'.
56 In the latter case, the caller must free the block.
57
58 The fourth and following args to tparam serve as the parameter values. */
59
60 static char *tparam1 (CONST char *string, char *outstring, int len,
61 CONST char *up, CONST char *left,
62 int *argp);
63
64 /* XEmacs: renamed this function because just tparam() conflicts with
65 ncurses */
66 char *emacs_tparam (CONST char *string, char *outstring, int len, int arg0,
67 int arg1, int arg2, int arg3);
68 char *
69 emacs_tparam (CONST char *string, char *outstring, int len, int arg0,
70 int arg1, int arg2, int arg3)
71 {
72 int arg[4];
73 arg[0] = arg0;
74 arg[1] = arg1;
75 arg[2] = arg2;
76 arg[3] = arg3;
77 return tparam1 (string, outstring, len, 0, 0, arg);
78 }
79
80 CONST char *BC;
81 CONST char *UP;
82
83 static char tgoto_buf[50];
84
85 char *tgoto (CONST char *cm, int hpos, int vpos);
86 char *
87 tgoto (CONST char *cm, int hpos, int vpos)
88 {
89 int args[2];
90 if (!cm)
91 return 0;
92 args[0] = vpos;
93 args[1] = hpos;
94 return tparam1 (cm, tgoto_buf, 50, UP, BC, args);
95 }
96
97 static char *
98 tparam1 (CONST char *string, char *outstring, int len, CONST char *up,
99 CONST char *left, int *argp)
100 {
101 int c;
102 CONST char *p = string;
103 char *op = outstring;
104 char *outend;
105 int outlen = 0;
106
107 int tem;
108 int *old_argp = argp;
109 int doleft = 0;
110 int doup = 0;
111
112 outend = outstring + len;
113
114 while (1)
115 {
116 /* If the buffer might be too short, make it bigger. */
117 if (op + 5 >= outend)
118 {
119 char *new;
120 if (outlen == 0)
121 {
122 outlen = len + 40;
123 new = (char *) malloc (outlen);
124 outend += 40;
125 memcpy (new, outstring, op - outstring);
126 }
127 else
128 {
129 outend += outlen;
130 outlen *= 2;
131 new = (char *) realloc (outstring, outlen);
132 }
133 op += new - outstring;
134 outend += new - outstring;
135 outstring = new;
136 }
137 c = *p++;
138 if (!c)
139 break;
140 if (c == '%')
141 {
142 c = *p++;
143 tem = *argp;
144 switch (c)
145 {
146 case 'd': /* %d means output in decimal. */
147 if (tem < 10)
148 goto onedigit;
149 if (tem < 100)
150 goto twodigit;
151 case '3': /* %3 means output in decimal, 3 digits. */
152 if (tem > 999)
153 {
154 *op++ = tem / 1000 + '0';
155 tem %= 1000;
156 }
157 *op++ = tem / 100 + '0';
158 case '2': /* %2 means output in decimal, 2 digits. */
159 twodigit:
160 tem %= 100;
161 *op++ = tem / 10 + '0';
162 onedigit:
163 *op++ = tem % 10 + '0';
164 argp++;
165 break;
166
167 case 'C':
168 /* For c-100: print quotient of value by 96, if nonzero,
169 then do like %+. */
170 if (tem >= 96)
171 {
172 *op++ = tem / 96;
173 tem %= 96;
174 }
175 case '+': /* %+x means add character code of char x. */
176 tem += *p++;
177 case '.': /* %. means output as character. */
178 if (left)
179 {
180 /* If want to forbid output of 0 and \n and \t,
181 and this is one of them, increment it. */
182 while (tem == 0 || tem == '\n' || tem == '\t')
183 {
184 tem++;
185 if (argp == old_argp)
186 doup++, outend -= strlen (up);
187 else
188 doleft++, outend -= strlen (left);
189 }
190 }
191 *op++ = tem | 0200;
192 case 'f': /* %f means discard next arg. */
193 argp++;
194 break;
195
196 case 'b': /* %b means back up one arg (and re-use it). */
197 argp--;
198 break;
199
200 case 'r': /* %r means interchange following two args. */
201 argp[0] = argp[1];
202 argp[1] = tem;
203 old_argp++;
204 break;
205
206 case '>': /* %>xy means if arg is > char code of x, */
207 if (argp[0] > *p++) /* then add char code of y to the arg, */
208 argp[0] += *p; /* and in any case don't output. */
209 p++; /* Leave the arg to be output later. */
210 break;
211
212 case 'a': /* %a means arithmetic. */
213 /* Next character says what operation.
214 Add or subtract either a constant or some other arg. */
215 /* First following character is + to add or - to subtract
216 or = to assign. */
217 /* Next following char is 'p' and an arg spec
218 (0100 plus position of that arg relative to this one)
219 or 'c' and a constant stored in a character. */
220 tem = p[2] & 0177;
221 if (p[1] == 'p')
222 tem = argp[tem - 0100];
223 if (p[0] == '-')
224 argp[0] -= tem;
225 else if (p[0] == '+')
226 argp[0] += tem;
227 else if (p[0] == '*')
228 argp[0] *= tem;
229 else if (p[0] == '/')
230 argp[0] /= tem;
231 else
232 argp[0] = tem;
233
234 p += 3;
235 break;
236
237 case 'i': /* %i means add one to arg, */
238 argp[0] ++; /* and leave it to be output later. */
239 argp[1] ++; /* Increment the following arg, too! */
240 break;
241
242 case '%': /* %% means output %; no arg. */
243 goto ordinary;
244
245 case 'n': /* %n means xor each of next two args with 140. */
246 argp[0] ^= 0140;
247 argp[1] ^= 0140;
248 break;
249
250 case 'm': /* %m means xor each of next two args with 177. */
251 argp[0] ^= 0177;
252 argp[1] ^= 0177;
253 break;
254
255 case 'B': /* %B means express arg as BCD char code. */
256 argp[0] += 6 * (tem / 10);
257 break;
258
259 case 'D': /* %D means weird Delta Data transformation. */
260 argp[0] -= 2 * (tem % 16);
261 break;
262 }
263 }
264 else
265 /* Ordinary character in the argument string. */
266 ordinary:
267 *op++ = c;
268 }
269 *op = 0;
270 while (doup-- > 0)
271 strcat (op, up);
272 while (doleft-- > 0)
273 strcat (op, left);
274 return outstring;
275 }
276
277 #ifdef DEBUG
278
279 main (argc, argv)
280 int argc;
281 char **argv;
282 {
283 char buf[50];
284 int args[3];
285 args[0] = atoi (argv[2]);
286 args[1] = atoi (argv[3]);
287 args[2] = atoi (argv[4]);
288 tparam1 (argv[1], buf, "LEFT", "UP", args);
289 printf ("%s\n", buf);
290 return 0;
291 }
292
293 #endif /* DEBUG */