Annotation of mandoc/macro.c, Revision 1.2
1.2 ! kristaps 1: /* $Id: macro.c,v 1.1 2008/12/12 10:11:10 kristaps Exp $ */
1.1 kristaps 2: /*
3: * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the
7: * above copyright notice and this permission notice appear in all
8: * copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
11: * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
12: * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
13: * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
14: * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
15: * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
16: * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
17: * PERFORMANCE OF THIS SOFTWARE.
18: */
1.2 ! kristaps 19: #include <assert.h>
! 20: #include <ctype.h>
1.1 kristaps 21: #include <stdlib.h>
1.2 ! kristaps 22: #include <stdio.h>
! 23:
! 24: #include "private.h"
! 25:
! 26: #define _C(p) ((const char **)p)
! 27:
! 28: static int isdelim(const char *);
! 29: static int args_next(struct mdoc *, int, int *, char *, char **);
! 30: static int append_text(struct mdoc *, int, int, int, char *[]);
! 31: static int append_scoped(struct mdoc *, int, int, int, char *[]);
1.1 kristaps 32:
33:
34: static int
1.2 ! kristaps 35: isdelim(const char *p)
! 36: {
! 37:
! 38: if (0 == *p)
! 39: return(0);
! 40: if (0 != *(p + 1))
! 41: return(0);
! 42:
! 43: switch (*p) {
! 44: case('{'):
! 45: /* FALLTHROUGH */
! 46: case('.'):
! 47: /* FALLTHROUGH */
! 48: case(','):
! 49: /* FALLTHROUGH */
! 50: case(';'):
! 51: /* FALLTHROUGH */
! 52: case(':'):
! 53: /* FALLTHROUGH */
! 54: case('?'):
! 55: /* FALLTHROUGH */
! 56: case('!'):
! 57: /* FALLTHROUGH */
! 58: case('('):
! 59: /* FALLTHROUGH */
! 60: case(')'):
! 61: /* FALLTHROUGH */
! 62: case('['):
! 63: /* FALLTHROUGH */
! 64: case(']'):
! 65: /* FALLTHROUGH */
! 66: case('}'):
! 67: return(1);
! 68: default:
! 69: break;
! 70: }
! 71:
! 72: return(0);
! 73: }
! 74:
! 75:
! 76: static int
! 77: args_next(struct mdoc *mdoc, int tok,
! 78: int *pos, char *buf, char **v)
1.1 kristaps 79: {
80:
81: if (0 == buf[*pos])
82: return(0);
83:
1.2 ! kristaps 84: assert( ! isspace(buf[*pos]));
! 85:
1.1 kristaps 86: if ('\"' == buf[*pos]) {
1.2 ! kristaps 87: (void)mdoc_err(mdoc, tok, *pos, ERR_SYNTAX_QUOTE);
1.1 kristaps 88: return(-1);
89: }
90:
91: *v = &buf[*pos];
92:
1.2 ! kristaps 93: /* Scan ahead to end of token. */
! 94:
1.1 kristaps 95: while (buf[*pos] && ! isspace(buf[*pos]))
96: (*pos)++;
97:
1.2 ! kristaps 98: if (buf[*pos] && buf[*pos + 1] && '\\' == buf[*pos]) {
! 99: (void)mdoc_err(mdoc, tok, *pos, ERR_SYNTAX_WS);
1.1 kristaps 100: return(-1);
101: }
102:
1.2 ! kristaps 103: if (0 == buf[*pos])
! 104: return(1);
! 105:
! 106: /* Scan ahead over trailing whitespace. */
! 107:
! 108: buf[(*pos)++] = 0;
! 109: while (buf[*pos] && isspace(buf[*pos]))
! 110: (*pos)++;
! 111:
! 112: if (0 == buf[*pos])
! 113: if ( ! mdoc_warn(mdoc, tok, *pos, WARN_SYNTAX_WS_EOLN))
! 114: return(-1);
! 115:
1.1 kristaps 116: return(1);
117: }
118:
1.2 ! kristaps 119:
! 120: static int
! 121: append_scoped(struct mdoc *mdoc, int tok, int pos, int sz, char *args[])
! 122: {
! 123:
! 124: args[sz] = NULL;
! 125: mdoc_block_alloc(mdoc, pos, tok, 0, NULL);
! 126: mdoc_head_alloc(mdoc, pos, tok, sz, _C(args));
! 127: mdoc_body_alloc(mdoc, pos, tok);
! 128: return(1);
! 129: }
! 130:
! 131:
1.1 kristaps 132: static int
1.2 ! kristaps 133: append_text(struct mdoc *mdoc, int tok, int pos, int sz, char *args[])
1.1 kristaps 134: {
135:
1.2 ! kristaps 136: args[sz] = NULL;
! 137:
! 138: switch (tok) {
! 139: /* ======= ADD MORE MACRO ARGUMENT-LIMITS BELOW. ======= */
1.1 kristaps 140:
1.2 ! kristaps 141: case (MDOC_Ft):
! 142: /* FALLTHROUGH */
! 143: case (MDOC_Li):
! 144: /* FALLTHROUGH */
! 145: case (MDOC_Ms):
! 146: /* FALLTHROUGH */
! 147: case (MDOC_Pa):
! 148: /* FALLTHROUGH */
! 149: case (MDOC_Tn):
! 150: if (0 == sz && ! mdoc_warn(mdoc, tok, pos, WARN_ARGS_GE1))
1.1 kristaps 151: return(0);
1.2 ! kristaps 152: mdoc_elem_alloc(mdoc, pos, tok, 0, NULL, sz, _C(args));
! 153: return(1);
! 154:
! 155: case (MDOC_Ar):
! 156: /* FALLTHROUGH */
! 157: case (MDOC_Cm):
! 158: /* FALLTHROUGH */
! 159: case (MDOC_Fl):
! 160: mdoc_elem_alloc(mdoc, pos, tok, 0, NULL, sz, _C(args));
! 161: return(1);
! 162:
! 163: case (MDOC_Ad):
! 164: /* FALLTHROUGH */
! 165: case (MDOC_Em):
! 166: /* FALLTHROUGH */
! 167: case (MDOC_Er):
! 168: /* FALLTHROUGH */
! 169: case (MDOC_Ev):
! 170: /* FALLTHROUGH */
! 171: case (MDOC_Fa):
! 172: /* FALLTHROUGH */
! 173: case (MDOC_Dv):
! 174: /* FALLTHROUGH */
! 175: case (MDOC_Ic):
! 176: /* FALLTHROUGH */
! 177: case (MDOC_Va):
! 178: /* FALLTHROUGH */
! 179: case (MDOC_Vt):
! 180: if (0 == sz)
! 181: return(mdoc_err(mdoc, tok, pos, ERR_ARGS_GE1));
! 182: mdoc_elem_alloc(mdoc, pos, tok, 0, NULL, sz, _C(args));
! 183: return(1);
! 184:
! 185: /* ======= ADD MORE MACRO ARGUMENT-LIMITS ABOVE. ======= */
! 186: default:
! 187: break;
! 188: }
! 189:
! 190: abort();
! 191: /* NOTREACHED */
! 192: }
! 193:
1.1 kristaps 194:
1.2 ! kristaps 195: int
! 196: macro_text(struct mdoc *mdoc, int tok, int ppos, int *pos, char *buf)
! 197: {
! 198: int lastarg, j, c, lasttok, lastpunct;
! 199: char *args[MDOC_LINEARG_MAX], *p;
1.1 kristaps 200:
1.2 ! kristaps 201: lasttok = ppos;
! 202: lastpunct = 0;
! 203: j = 0;
! 204:
! 205: again:
! 206:
! 207: lastarg = *pos;
! 208: c = args_next(mdoc, tok, pos, buf, &args[j]);
! 209:
! 210: if (-1 == c)
! 211: return(0);
! 212: if (0 == c && ! lastpunct)
! 213: return(append_text(mdoc, tok, lasttok, j, args));
! 214: else if (0 == c)
! 215: return(1);
! 216:
! 217: /* Command found. */
! 218:
! 219: if (MDOC_MAX != (c = mdoc_find(mdoc, args[j]))) {
! 220: if ( ! lastpunct)
! 221: if ( ! append_text(mdoc, tok, lasttok, j, args))
1.1 kristaps 222: return(0);
1.2 ! kristaps 223: return(mdoc_macro(mdoc, c, lastarg, pos, buf));
! 224: }
! 225:
! 226: /* Word found. */
! 227:
! 228: if ( ! isdelim(args[j])) {
! 229: j++;
! 230: goto again;
! 231: }
! 232:
! 233: /* Punctuation found. */
! 234:
! 235: p = args[j]; /* Save argument (NULL-ified in append). */
! 236:
! 237: if ( ! lastpunct)
! 238: if ( ! append_text(mdoc, tok, lasttok, j, args))
! 239: return(0);
! 240:
! 241: args[j] = p;
! 242:
! 243: mdoc_word_alloc(mdoc, lastarg, args[j]);
! 244: lastpunct = 1;
! 245: j = 0;
! 246:
! 247: goto again;
! 248:
! 249: /* NOTREACHED */
! 250: }
1.1 kristaps 251:
252:
1.2 ! kristaps 253: int
! 254: macro_scoped_implicit(struct mdoc *mdoc,
! 255: int tok, int ppos, int *pos, char *buf)
! 256: {
! 257: int j, c, lastarg, t;
! 258: char *args[MDOC_LINEARG_MAX];
! 259: struct mdoc_node *n;
! 260:
! 261: /*
! 262: * Look for an implicit parent.
! 263: */
1.1 kristaps 264:
1.2 ! kristaps 265: assert( ! (MDOC_EXPLICIT & mdoc_macros[tok].flags));
1.1 kristaps 266:
1.2 ! kristaps 267: for (n = mdoc->last; n; n = n->parent) {
! 268: if (MDOC_BLOCK != n->type)
! 269: continue;
! 270: if (tok == (t = n->data.block.tok))
1.1 kristaps 271: break;
1.2 ! kristaps 272: if ( ! (MDOC_EXPLICIT & mdoc_macros[t].flags))
! 273: continue;
! 274: return(mdoc_err(mdoc, tok, ppos, ERR_SCOPE_BREAK));
! 275: }
! 276:
! 277: if (n) {
! 278: mdoc->last = n;
! 279: mdoc_msg(mdoc, ppos, "scope: rewound `%s'",
! 280: mdoc_macronames[tok]);
! 281: } else
! 282: mdoc_msg(mdoc, ppos, "scope: new `%s'",
! 283: mdoc_macronames[tok]);
! 284:
! 285: j = 0;
! 286:
! 287: again:
! 288:
! 289: lastarg = *pos;
! 290: c = args_next(mdoc, tok, pos, buf, &args[j]);
! 291:
! 292: if (-1 == c)
! 293: return(0);
! 294: if (0 == c)
! 295: return(append_scoped(mdoc, tok, ppos, j, args));
1.1 kristaps 296:
1.2 ! kristaps 297: /* Command found. */
1.1 kristaps 298:
1.2 ! kristaps 299: if (MDOC_MAX != (c = mdoc_find(mdoc, args[j])))
! 300: if ( ! mdoc_warn(mdoc, tok, *pos, WARN_SYNTAX_MACLIKE))
1.1 kristaps 301: return(0);
302:
1.2 ! kristaps 303: /* Word found. */
! 304:
! 305: j++;
! 306: goto again;
1.1 kristaps 307:
1.2 ! kristaps 308: /* NOTREACHED */
1.1 kristaps 309: }
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