| 1 | /* Merge parameters into a termcap entry string. |
| 2 | Copyright (C) 1985, 87, 93, 95 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 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> |
| 21 | #endif |
| 22 | |
| 23 | #ifndef emacs |
| 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 | |
| 36 | #endif /* not emacs */ |
| 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 | { |
| 96 | int arg[4]; |
| 97 | |
| 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); |
| 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 */ |