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1.1 root 1: /* Merge parameters into a termcap entry string.
2: Copyright (C) 1985, 1987 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 1, 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; if not, write to the Free Software
16: Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17:
18: In other words, you are welcome to use, share and improve this program.
19: You are forbidden to forbid anyone else to use, share and improve
20: what you give them. Help stamp out software-hoarding! */
21:
22:
23: /* config.h may rename various library functions such as malloc. */
24: #ifdef emacs
25: #include "config.h"
26: #endif
27:
28: /* Assuming STRING is the value of a termcap string entry
29: containing `%' constructs to expand parameters,
30: merge in parameter values and store result in block OUTSTRING points to.
31: LEN is the length of OUTSTRING. If more space is needed,
32: a block is allocated with `malloc'.
33:
34: The value returned is the address of the resulting string.
35: This may be OUTSTRING or may be the address of a block got with `malloc'.
36: In the latter case, the caller must free the block.
37:
38: The fourth and following args to tparam serve as the parameter values. */
39:
40: static char *tparam1 ();
41:
42: /* VARARGS 2 */
43: char *
44: tparam (string, outstring, len, arg0, arg1, arg2, arg3)
45: char *string;
46: char *outstring;
47: int len;
48: int arg0, arg1, arg2, arg3;
49: {
50: #ifdef NO_ARG_ARRAY
51: int arg[4];
52: arg[0] = arg0;
53: arg[1] = arg1;
54: arg[2] = arg2;
55: arg[3] = arg3;
56: return tparam1 (string, outstring, len, 0, 0, arg);
57: #else
58: return tparam1 (string, outstring, len, 0, 0, &arg0);
59: #endif
60: }
61:
62: char *BC;
63: char *UP;
64:
65: static char tgoto_buf[50];
66:
67: char *
68: tgoto (cm, hpos, vpos)
69: char *cm;
70: int hpos, vpos;
71: {
72: int args[2];
73: if (!cm)
74: return 0;
75: args[0] = vpos;
76: args[1] = hpos;
77: return tparam1 (cm, tgoto_buf, 50, UP, BC, args);
78: }
79:
80: static char *
81: tparam1 (string, outstring, len, up, left, argp)
82: char *string;
83: char *outstring;
84: int len;
85: char *up, *left;
86: register int *argp;
87: {
88: register int c;
89: register char *p = string;
90: register char *op = outstring;
91: char *outend;
92: int outlen = 0;
93:
94: register int tem;
95: int *oargp = argp;
96: int doleft = 0;
97: int doup = 0;
98:
99: outend = outstring + len;
100:
101: while (1)
102: {
103: /* If the buffer might be too short, make it bigger. */
104: if (op + 5 >= outend)
105: {
106: register char *new;
107: if (outlen == 0)
108: {
109: new = (char *) malloc (outlen = 40 + len);
110: outend += 40;
111: bcopy (outstring, new, op - outstring);
112: }
113: else
114: {
115: outend += outlen;
116: new = (char *) realloc (outstring, outlen *= 2);
117: }
118: op += new - outstring;
119: outend += new - outstring;
120: outstring = new;
121: }
122: if (!(c = *p++))
123: break;
124: if (c == '%')
125: {
126: c = *p++;
127: tem = *argp;
128: switch (c)
129: {
130: case 'd': /* %d means output in decimal */
131: if (tem < 10)
132: goto onedigit;
133: if (tem < 100)
134: goto twodigit;
135: case '3': /* %3 means output in decimal, 3 digits. */
136: if (tem > 999)
137: {
138: *op++ = tem / 1000 + '0';
139: tem %= 1000;
140: }
141: *op++ = tem / 100 + '0';
142: case '2': /* %2 means output in decimal, 2 digits. */
143: twodigit:
144: tem %= 100;
145: *op++ = tem / 10 + '0';
146: onedigit:
147: *op++ = tem % 10 + '0';
148: argp++;
149: break;
150:
151: case 'C':
152: /* For c-100: print quotient of value by 96, if nonzero,
153: then do like %+ */
154: if (tem >= 96)
155: {
156: *op++ = tem / 96;
157: tem %= 96;
158: }
159: case '+': /* %+x means add character code of char x */
160: tem += *p++;
161: case '.': /* %. means output as character */
162: if (left)
163: {
164: /* If want to forbid output of 0 and \n and \t,
165: and this is one of them, increment it. */
166: while (tem == 0 || tem == '\n' || tem == '\t')
167: {
168: tem++;
169: if (argp == oargp)
170: doup++, outend -= strlen (up);
171: else
172: doleft++, outend -= strlen (left);
173: }
174: }
175: *op++ = tem | 0200;
176: case 'f': /* %f means discard next arg */
177: argp++;
178: break;
179:
180: case 'b': /* %b means back up one arg (and re-use it) */
181: argp--;
182: break;
183:
184: case 'r': /* %r means interchange following two args */
185: argp[0] = argp[1];
186: argp[1] = tem;
187: oargp++;
188: break;
189:
190: case '>': /* %>xy means if arg is > char code of x, */
191: if (argp[0] > *p++) /* then add char code of y to the arg, */
192: argp[0] += *p; /* and in any case don't output. */
193: p++; /* Leave the arg to be output later. */
194: break;
195:
196: case 'a': /* %a means arithmetic */
197: /* Next character says what operation.
198: Add or subtract either a constant or some other arg */
199: /* First following character is + to add or - to subtract
200: or = to assign. */
201: /* Next following char is 'p' and an arg spec
202: (0100 plus position of that arg relative to this one)
203: or 'c' and a constant stored in a character */
204: tem = p[2] & 0177;
205: if (p[1] == 'p')
206: tem = argp[tem - 0100];
207: if (p[0] == '-')
208: argp[0] -= tem;
209: else if (p[0] == '+')
210: argp[0] += tem;
211: else if (p[0] == '*')
212: argp[0] *= tem;
213: else if (p[0] == '/')
214: argp[0] /= tem;
215: else
216: argp[0] = tem;
217:
218: p += 3;
219: break;
220:
221: case 'i': /* %i means add one to arg, */
222: argp[0] ++; /* and leave it to be output later. */
223: argp[1] ++; /* Increment the following arg, too! */
224: break;
225:
226: case '%': /* %% means output %; no arg. */
227: goto ordinary;
228:
229: case 'n': /* %n means xor each of next two args with 140 */
230: argp[0] ^= 0140;
231: argp[1] ^= 0140;
232: break;
233:
234: case 'm': /* %m means xor each of next two args with 177 */
235: argp[0] ^= 0177;
236: argp[1] ^= 0177;
237: break;
238:
239: case 'B': /* %B means express arg as BCD char code. */
240: argp[0] += 6 * (tem / 10);
241: break;
242:
243: case 'D': /* %D means weird Delta Data transformation */
244: argp[0] -= 2 * (tem % 16);
245: break;
246: }
247: }
248: else
249: /* Ordinary character in the argument string. */
250: ordinary:
251: *op++ = c;
252: }
253: *op = 0;
254: while (doup-- > 0)
255: strcat (op, up);
256: while (doleft-- > 0)
257: strcat (op, left);
258: return outstring;
259: }
260:
261: #ifdef DEBUG
262:
263: main (argc, argv)
264: int argc;
265: char **argv;
266: {
267: char buf[50];
268: int args[3];
269: args[0] = atoi (argv[2]);
270: args[1] = atoi (argv[3]);
271: args[2] = atoi (argv[4]);
272: tparam1 (argv[1], buf, "LEFT", "UP", args);
273: printf ("%s\n", buf);
274: return 0;
275: }
276:
277: #endif /* DEBUG */
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