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1.1 ! kristaps 1: /* $Id: man_macro.c,v 1.13 2009/04/05 16:34:22 kristaps Exp $ */
! 2: /*
! 3: * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@openbsd.org>
! 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: */
! 19: #include <assert.h>
! 20: #include <ctype.h>
! 21: #include <stdlib.h>
! 22: #include <string.h>
! 23:
! 24: #include "libman.h"
! 25:
! 26: #define FL_NLINE (1 << 0)
! 27: #define FL_TLINE (1 << 1)
! 28:
! 29: static int man_args(struct man *, int,
! 30: int *, char *, char **);
! 31:
! 32: static int man_flags[MAN_MAX] = {
! 33: 0, /* __ */
! 34: 0, /* TH */
! 35: 0, /* SH */
! 36: 0, /* SS */
! 37: FL_TLINE, /* TP */
! 38: 0, /* LP */
! 39: 0, /* PP */
! 40: 0, /* P */
! 41: 0, /* IP */
! 42: 0, /* HP */
! 43: FL_NLINE, /* SM */
! 44: FL_NLINE, /* SB */
! 45: FL_NLINE, /* BI */
! 46: FL_NLINE, /* IB */
! 47: FL_NLINE, /* BR */
! 48: FL_NLINE, /* RB */
! 49: FL_NLINE, /* R */
! 50: FL_NLINE, /* B */
! 51: FL_NLINE, /* I */
! 52: FL_NLINE, /* IR */
! 53: FL_NLINE, /* RI */
! 54: 0, /* br */
! 55: 0, /* na */
! 56: FL_NLINE, /* i */
! 57: };
! 58:
! 59: int
! 60: man_macro(struct man *man, int tok, int line,
! 61: int ppos, int *pos, char *buf)
! 62: {
! 63: int w, la;
! 64: char *p;
! 65: struct man_node *n;
! 66:
! 67: if ( ! man_elem_alloc(man, line, ppos, tok))
! 68: return(0);
! 69: n = man->last;
! 70: man->next = MAN_NEXT_CHILD;
! 71:
! 72: for (;;) {
! 73: la = *pos;
! 74: w = man_args(man, line, pos, buf, &p);
! 75:
! 76: if (-1 == w)
! 77: return(0);
! 78: if (0 == w)
! 79: break;
! 80:
! 81: if ( ! man_word_alloc(man, line, la, p))
! 82: return(0);
! 83: man->next = MAN_NEXT_SIBLING;
! 84: }
! 85:
! 86: if (n == man->last && (FL_NLINE & man_flags[tok])) {
! 87: if (MAN_NLINE & man->flags)
! 88: return(man_verr(man, line, ppos,
! 89: "next-line scope already open"));
! 90: man->flags |= MAN_NLINE;
! 91: return(1);
! 92: }
! 93:
! 94: if (FL_TLINE & man_flags[tok]) {
! 95: if (MAN_NLINE & man->flags)
! 96: return(man_verr(man, line, ppos,
! 97: "next-line scope already open"));
! 98: man->flags |= MAN_NLINE;
! 99: return(1);
! 100: }
! 101:
! 102: /*
! 103: * Note that when TH is pruned, we'll be back at the root, so
! 104: * make sure that we don't clobber as its sibling.
! 105: */
! 106:
! 107: for ( ; man->last; man->last = man->last->parent) {
! 108: if (man->last == n)
! 109: break;
! 110: if (man->last->type == MAN_ROOT)
! 111: break;
! 112: if ( ! man_valid_post(man))
! 113: return(0);
! 114: if ( ! man_action_post(man))
! 115: return(0);
! 116: }
! 117:
! 118: assert(man->last);
! 119:
! 120: /*
! 121: * Same here regarding whether we're back at the root.
! 122: */
! 123:
! 124: if (man->last->type != MAN_ROOT && ! man_valid_post(man))
! 125: return(0);
! 126: if (man->last->type != MAN_ROOT && ! man_action_post(man))
! 127: return(0);
! 128: if (man->last->type != MAN_ROOT)
! 129: man->next = MAN_NEXT_SIBLING;
! 130:
! 131: return(1);
! 132: }
! 133:
! 134:
! 135: int
! 136: man_macroend(struct man *m)
! 137: {
! 138:
! 139: for ( ; m->last && m->last != m->first;
! 140: m->last = m->last->parent) {
! 141: if ( ! man_valid_post(m))
! 142: return(0);
! 143: if ( ! man_action_post(m))
! 144: return(0);
! 145: }
! 146: assert(m->last == m->first);
! 147:
! 148: if ( ! man_valid_post(m))
! 149: return(0);
! 150: if ( ! man_action_post(m))
! 151: return(0);
! 152:
! 153: return(1);
! 154: }
! 155:
! 156:
! 157: /* ARGSUSED */
! 158: static int
! 159: man_args(struct man *m, int line,
! 160: int *pos, char *buf, char **v)
! 161: {
! 162:
! 163: if (0 == buf[*pos])
! 164: return(0);
! 165:
! 166: /* First parse non-quoted strings. */
! 167:
! 168: if ('\"' != buf[*pos]) {
! 169: *v = &buf[*pos];
! 170:
! 171: while (buf[*pos]) {
! 172: if (' ' == buf[*pos])
! 173: if ('\\' != buf[*pos - 1])
! 174: break;
! 175: (*pos)++;
! 176: }
! 177:
! 178: if (0 == buf[*pos])
! 179: return(1);
! 180:
! 181: buf[(*pos)++] = 0;
! 182:
! 183: if (0 == buf[*pos])
! 184: return(1);
! 185:
! 186: while (buf[*pos] && ' ' == buf[*pos])
! 187: (*pos)++;
! 188:
! 189: if (buf[*pos])
! 190: return(1);
! 191:
! 192: if ( ! man_vwarn(m, line, *pos, "trailing spaces"))
! 193: return(-1);
! 194:
! 195: return(1);
! 196: }
! 197:
! 198: /*
! 199: * If we're a quoted string (and quoted strings are allowed),
! 200: * then parse ahead to the next quote. If none's found, it's an
! 201: * error. After, parse to the next word.
! 202: */
! 203:
! 204: *v = &buf[++(*pos)];
! 205:
! 206: while (buf[*pos] && '\"' != buf[*pos])
! 207: (*pos)++;
! 208:
! 209: if (0 == buf[*pos]) {
! 210: if ( ! man_vwarn(m, line, *pos, "unterminated quote"))
! 211: return(-1);
! 212: return(1);
! 213: }
! 214:
! 215: buf[(*pos)++] = 0;
! 216: if (0 == buf[*pos])
! 217: return(1);
! 218:
! 219: while (buf[*pos] && ' ' == buf[*pos])
! 220: (*pos)++;
! 221:
! 222: if (buf[*pos])
! 223: return(1);
! 224:
! 225: if ( ! man_vwarn(m, line, *pos, "trailing spaces"))
! 226: return(-1);
! 227: return(1);
! 228: }