1/* Merge parameters into a termcap entry string. 2 Copyright (C) 1985, 87, 93, 95 Free Software Foundation, Inc. 3 4This program is free software; you can redistribute it and/or modify 5it under the terms of the GNU General Public License as published by 6the Free Software Foundation; either version 2, or (at your option) 7any later version. 8 9This program is distributed in the hope that it will be useful, 10but WITHOUT ANY WARRANTY; without even the implied warranty of 11MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12GNU General Public License for more details. 13 14You should have received a copy of the GNU General Public License 15along with this program; see the file COPYING. If not, write to the 16Free Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ 17 18/* Emacs config.h may rename various library functions such as malloc. */ 19#ifdef HAVE_CONFIG_H 20#include <config.h> 21 22#ifdef HAVE_STDLIB_H 23# include <stdlib.h> 24#else 25extern char *getenv (); 26extern char *malloc (); 27extern char *realloc (); 28#endif 29 30#if defined (HAVE_STRING_H) 31#include <string.h> 32#endif 33 34#if !defined (HAVE_BCOPY) && (defined (HAVE_STRING_H) || defined (STDC_HEADERS)) 35# define bcopy(s, d, n) memcpy ((d), (s), (n)) 36#endif 37 38#else /* not HAVE_CONFIG_H */ 39 40#if defined(HAVE_STRING_H) || defined(STDC_HEADERS) 41#define bcopy(s, d, n) memcpy ((d), (s), (n)) 42#endif 43 44#ifdef STDC_HEADERS 45#include <stdlib.h> 46#include <string.h> 47#else 48char *malloc (); 49char *realloc (); 50#endif 51 52#endif /* not HAVE_CONFIG_H */ 53 54#include "ltcap.h" 55 56#ifndef NULL 57#define NULL (char *) 0 58#endif 59 60#ifndef emacs 61static void 62memory_out () 63{ 64 write (2, "virtual memory exhausted\n", 25); 65 exit (1); 66} 67 68static char * 69xmalloc (size) 70 unsigned size; 71{ 72 register char *tem = malloc (size); 73 74 if (!tem) 75 memory_out (); 76 return tem; 77} 78 79static char * 80xrealloc (ptr, size) 81 char *ptr; 82 unsigned size; 83{ 84 register char *tem = realloc (ptr, size); 85 86 if (!tem) 87 memory_out (); 88 return tem; 89} 90#endif /* not emacs */ 91 92/* Assuming STRING is the value of a termcap string entry 93 containing `%' constructs to expand parameters, 94 merge in parameter values and store result in block OUTSTRING points to. 95 LEN is the length of OUTSTRING. If more space is needed, 96 a block is allocated with `malloc'. 97 98 The value returned is the address of the resulting string. 99 This may be OUTSTRING or may be the address of a block got with `malloc'. 100 In the latter case, the caller must free the block. 101 102 The fourth and following args to tparam serve as the parameter values. */ 103 104static char *tparam1 (); 105 106/* VARARGS 2 */ 107char * 108tparam (string, outstring, len, arg0, arg1, arg2, arg3) 109 char *string; 110 char *outstring; 111 int len; 112 int arg0, arg1, arg2, arg3; 113{ 114 int arg[4]; 115 116 arg[0] = arg0; 117 arg[1] = arg1; 118 arg[2] = arg2; 119 arg[3] = arg3; 120 return tparam1 (string, outstring, len, NULL, NULL, arg); 121} 122 123__private_extern__ char *BC; 124__private_extern__ char *UP; 125 126static char tgoto_buf[50]; 127 128__private_extern__ 129char * 130tgoto (cm, hpos, vpos) 131 char *cm; 132 int hpos, vpos; 133{ 134 int args[2]; 135 if (!cm) 136 return NULL; 137 args[0] = vpos; 138 args[1] = hpos; 139 return tparam1 (cm, tgoto_buf, 50, UP, BC, args); 140} 141 142static char * 143tparam1 (string, outstring, len, up, left, argp) 144 char *string; 145 char *outstring; 146 int len; 147 char *up, *left; 148 register int *argp; 149{ 150 register int c; 151 register char *p = string; 152 register char *op = outstring; 153 char *outend; 154 int outlen = 0; 155 156 register int tem; 157 int *old_argp = argp; 158 int doleft = 0; 159 int doup = 0; 160 161 outend = outstring + len; 162 163 while (1) 164 { 165 /* If the buffer might be too short, make it bigger. */ 166 if (op + 5 >= outend) 167 { 168 register char *new; 169 if (outlen == 0) 170 { 171 outlen = len + 40; 172 new = (char *) xmalloc (outlen); 173 outend += 40; 174 bcopy (outstring, new, op - outstring); 175 } 176 else 177 { 178 outend += outlen; 179 outlen *= 2; 180 new = (char *) xrealloc (outstring, outlen); 181 } 182 op += new - outstring; 183 outend += new - outstring; 184 outstring = new; 185 } 186 c = *p++; 187 if (!c) 188 break; 189 if (c == '%') 190 { 191 c = *p++; 192 tem = *argp; 193 switch (c) 194 { 195 case 'd': /* %d means output in decimal. */ 196 if (tem < 10) 197 goto onedigit; 198 if (tem < 100) 199 goto twodigit; 200 case '3': /* %3 means output in decimal, 3 digits. */ 201 if (tem > 999) 202 { 203 *op++ = tem / 1000 + '0'; 204 tem %= 1000; 205 } 206 *op++ = tem / 100 + '0'; 207 case '2': /* %2 means output in decimal, 2 digits. */ 208 twodigit: 209 tem %= 100; 210 *op++ = tem / 10 + '0'; 211 onedigit: 212 *op++ = tem % 10 + '0'; 213 argp++; 214 break; 215 216 case 'C': 217 /* For c-100: print quotient of value by 96, if nonzero, 218 then do like %+. */ 219 if (tem >= 96) 220 { 221 *op++ = tem / 96; 222 tem %= 96; 223 } 224 case '+': /* %+x means add character code of char x. */ 225 tem += *p++; 226 case '.': /* %. means output as character. */ 227 if (left) 228 { 229 /* If want to forbid output of 0 and \n and \t, 230 and this is one of them, increment it. */ 231 while (tem == 0 || tem == '\n' || tem == '\t') 232 { 233 tem++; 234 if (argp == old_argp) 235 doup++, outend -= strlen (up); 236 else 237 doleft++, outend -= strlen (left); 238 } 239 } 240 *op++ = tem ? tem : 0200; 241 case 'f': /* %f means discard next arg. */ 242 argp++; 243 break; 244 245 case 'b': /* %b means back up one arg (and re-use it). */ 246 argp--; 247 break; 248 249 case 'r': /* %r means interchange following two args. */ 250 argp[0] = argp[1]; 251 argp[1] = tem; 252 old_argp++; 253 break; 254 255 case '>': /* %>xy means if arg is > char code of x, */ 256 if (argp[0] > *p++) /* then add char code of y to the arg, */ 257 argp[0] += *p; /* and in any case don't output. */ 258 p++; /* Leave the arg to be output later. */ 259 break; 260 261 case 'a': /* %a means arithmetic. */ 262 /* Next character says what operation. 263 Add or subtract either a constant or some other arg. */ 264 /* First following character is + to add or - to subtract 265 or = to assign. */ 266 /* Next following char is 'p' and an arg spec 267 (0100 plus position of that arg relative to this one) 268 or 'c' and a constant stored in a character. */ 269 tem = p[2] & 0177; 270 if (p[1] == 'p') 271 tem = argp[tem - 0100]; 272 if (p[0] == '-') 273 argp[0] -= tem; 274 else if (p[0] == '+') 275 argp[0] += tem; 276 else if (p[0] == '*') 277 argp[0] *= tem; 278 else if (p[0] == '/') 279 argp[0] /= tem; 280 else 281 argp[0] = tem; 282 283 p += 3; 284 break; 285 286 case 'i': /* %i means add one to arg, */ 287 argp[0] ++; /* and leave it to be output later. */ 288 argp[1] ++; /* Increment the following arg, too! */ 289 break; 290 291 case '%': /* %% means output %; no arg. */ 292 goto ordinary; 293 294 case 'n': /* %n means xor each of next two args with 140. */ 295 argp[0] ^= 0140; 296 argp[1] ^= 0140; 297 break; 298 299 case 'm': /* %m means xor each of next two args with 177. */ 300 argp[0] ^= 0177; 301 argp[1] ^= 0177; 302 break; 303 304 case 'B': /* %B means express arg as BCD char code. */ 305 argp[0] += 6 * (tem / 10); 306 break; 307 308 case 'D': /* %D means weird Delta Data transformation. */ 309 argp[0] -= 2 * (tem % 16); 310 break; 311 } 312 } 313 else 314 /* Ordinary character in the argument string. */ 315 ordinary: 316 *op++ = c; 317 } 318 *op = 0; 319 while (doup-- > 0) 320 strcat (op, up); 321 while (doleft-- > 0) 322 strcat (op, left); 323 return outstring; 324} 325 326#ifdef DEBUG 327 328main (argc, argv) 329 int argc; 330 char **argv; 331{ 332 char buf[50]; 333 int args[3]; 334 args[0] = atoi (argv[2]); 335 args[1] = atoi (argv[3]); 336 args[2] = atoi (argv[4]); 337 tparam1 (argv[1], buf, "LEFT", "UP", args); 338 printf ("%s\n", buf); 339 return 0; 340} 341 342#endif /* DEBUG */ 343