950 lines
21 KiB
C
950 lines
21 KiB
C
/* $Vendor-Id: eqn.c,v 1.38 2011/07/25 15:37:00 kristaps Exp $ */
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/*
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* Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <assert.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include "mandoc.h"
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#include "libmandoc.h"
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#include "libroff.h"
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#define EQN_NEST_MAX 128 /* maximum nesting of defines */
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#define EQN_MSG(t, x) mandoc_msg((t), (x)->parse, (x)->eqn.ln, (x)->eqn.pos, NULL)
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enum eqn_rest {
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EQN_DESCOPE,
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EQN_ERR,
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EQN_OK,
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EQN_EOF
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};
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enum eqn_symt {
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EQNSYM_alpha,
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EQNSYM_beta,
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EQNSYM_chi,
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EQNSYM_delta,
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EQNSYM_epsilon,
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EQNSYM_eta,
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EQNSYM_gamma,
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EQNSYM_iota,
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EQNSYM_kappa,
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EQNSYM_lambda,
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EQNSYM_mu,
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EQNSYM_nu,
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EQNSYM_omega,
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EQNSYM_omicron,
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EQNSYM_phi,
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EQNSYM_pi,
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EQNSYM_ps,
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EQNSYM_rho,
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EQNSYM_sigma,
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EQNSYM_tau,
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EQNSYM_theta,
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EQNSYM_upsilon,
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EQNSYM_xi,
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EQNSYM_zeta,
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EQNSYM_DELTA,
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EQNSYM_GAMMA,
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EQNSYM_LAMBDA,
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EQNSYM_OMEGA,
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EQNSYM_PHI,
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EQNSYM_PI,
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EQNSYM_PSI,
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EQNSYM_SIGMA,
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EQNSYM_THETA,
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EQNSYM_UPSILON,
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EQNSYM_XI,
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EQNSYM_inter,
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EQNSYM_union,
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EQNSYM_prod,
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EQNSYM_int,
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EQNSYM_sum,
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EQNSYM_grad,
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EQNSYM_del,
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EQNSYM_times,
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EQNSYM_cdot,
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EQNSYM_nothing,
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EQNSYM_approx,
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EQNSYM_prime,
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EQNSYM_half,
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EQNSYM_partial,
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EQNSYM_inf,
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EQNSYM_muchgreat,
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EQNSYM_muchless,
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EQNSYM_larrow,
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EQNSYM_rarrow,
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EQNSYM_pm,
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EQNSYM_nequal,
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EQNSYM_equiv,
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EQNSYM_lessequal,
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EQNSYM_moreequal,
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EQNSYM__MAX
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};
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enum eqnpartt {
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EQN_DEFINE = 0,
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EQN_NDEFINE,
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EQN_TDEFINE,
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EQN_SET,
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EQN_UNDEF,
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EQN_GFONT,
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EQN_GSIZE,
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EQN_BACK,
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EQN_FWD,
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EQN_UP,
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EQN_DOWN,
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EQN__MAX
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};
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struct eqnstr {
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const char *name;
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size_t sz;
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};
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#define STRNEQ(p1, sz1, p2, sz2) \
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((sz1) == (sz2) && 0 == strncmp((p1), (p2), (sz1)))
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#define EQNSTREQ(x, p, sz) \
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STRNEQ((x)->name, (x)->sz, (p), (sz))
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struct eqnpart {
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struct eqnstr str;
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int (*fp)(struct eqn_node *);
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};
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struct eqnsym {
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struct eqnstr str;
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const char *sym;
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};
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static enum eqn_rest eqn_box(struct eqn_node *, struct eqn_box *);
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static struct eqn_box *eqn_box_alloc(struct eqn_node *,
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struct eqn_box *);
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static void eqn_box_free(struct eqn_box *);
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static struct eqn_def *eqn_def_find(struct eqn_node *,
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const char *, size_t);
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static int eqn_do_gfont(struct eqn_node *);
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static int eqn_do_gsize(struct eqn_node *);
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static int eqn_do_define(struct eqn_node *);
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static int eqn_do_ign1(struct eqn_node *);
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static int eqn_do_ign2(struct eqn_node *);
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static int eqn_do_tdefine(struct eqn_node *);
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static int eqn_do_undef(struct eqn_node *);
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static enum eqn_rest eqn_eqn(struct eqn_node *, struct eqn_box *);
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static enum eqn_rest eqn_list(struct eqn_node *, struct eqn_box *);
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static enum eqn_rest eqn_matrix(struct eqn_node *, struct eqn_box *);
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static const char *eqn_nexttok(struct eqn_node *, size_t *);
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static const char *eqn_nextrawtok(struct eqn_node *, size_t *);
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static const char *eqn_next(struct eqn_node *,
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char, size_t *, int);
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static void eqn_rewind(struct eqn_node *);
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static const struct eqnpart eqnparts[EQN__MAX] = {
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{ { "define", 6 }, eqn_do_define }, /* EQN_DEFINE */
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{ { "ndefine", 7 }, eqn_do_define }, /* EQN_NDEFINE */
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{ { "tdefine", 7 }, eqn_do_tdefine }, /* EQN_TDEFINE */
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{ { "set", 3 }, eqn_do_ign2 }, /* EQN_SET */
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{ { "undef", 5 }, eqn_do_undef }, /* EQN_UNDEF */
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{ { "gfont", 5 }, eqn_do_gfont }, /* EQN_GFONT */
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{ { "gsize", 5 }, eqn_do_gsize }, /* EQN_GSIZE */
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{ { "back", 4 }, eqn_do_ign1 }, /* EQN_BACK */
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{ { "fwd", 3 }, eqn_do_ign1 }, /* EQN_FWD */
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{ { "up", 2 }, eqn_do_ign1 }, /* EQN_UP */
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{ { "down", 4 }, eqn_do_ign1 }, /* EQN_DOWN */
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};
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static const struct eqnstr eqnmarks[EQNMARK__MAX] = {
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{ "", 0 }, /* EQNMARK_NONE */
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{ "dot", 3 }, /* EQNMARK_DOT */
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{ "dotdot", 6 }, /* EQNMARK_DOTDOT */
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{ "hat", 3 }, /* EQNMARK_HAT */
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{ "tilde", 5 }, /* EQNMARK_TILDE */
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{ "vec", 3 }, /* EQNMARK_VEC */
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{ "dyad", 4 }, /* EQNMARK_DYAD */
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{ "bar", 3 }, /* EQNMARK_BAR */
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{ "under", 5 }, /* EQNMARK_UNDER */
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};
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static const struct eqnstr eqnfonts[EQNFONT__MAX] = {
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{ "", 0 }, /* EQNFONT_NONE */
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{ "roman", 5 }, /* EQNFONT_ROMAN */
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{ "bold", 4 }, /* EQNFONT_BOLD */
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{ "fat", 3 }, /* EQNFONT_FAT */
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{ "italic", 6 }, /* EQNFONT_ITALIC */
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};
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static const struct eqnstr eqnposs[EQNPOS__MAX] = {
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{ "", 0 }, /* EQNPOS_NONE */
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{ "over", 4 }, /* EQNPOS_OVER */
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{ "sup", 3 }, /* EQNPOS_SUP */
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{ "sub", 3 }, /* EQNPOS_SUB */
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{ "to", 2 }, /* EQNPOS_TO */
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{ "from", 4 }, /* EQNPOS_FROM */
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};
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static const struct eqnstr eqnpiles[EQNPILE__MAX] = {
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{ "", 0 }, /* EQNPILE_NONE */
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{ "pile", 4 }, /* EQNPILE_PILE */
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{ "cpile", 5 }, /* EQNPILE_CPILE */
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{ "rpile", 5 }, /* EQNPILE_RPILE */
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{ "lpile", 5 }, /* EQNPILE_LPILE */
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{ "col", 3 }, /* EQNPILE_COL */
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{ "ccol", 4 }, /* EQNPILE_CCOL */
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{ "rcol", 4 }, /* EQNPILE_RCOL */
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{ "lcol", 4 }, /* EQNPILE_LCOL */
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};
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static const struct eqnsym eqnsyms[EQNSYM__MAX] = {
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{ { "alpha", 5 }, "*a" }, /* EQNSYM_alpha */
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{ { "beta", 4 }, "*b" }, /* EQNSYM_beta */
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{ { "chi", 3 }, "*x" }, /* EQNSYM_chi */
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{ { "delta", 5 }, "*d" }, /* EQNSYM_delta */
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{ { "epsilon", 7 }, "*e" }, /* EQNSYM_epsilon */
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{ { "eta", 3 }, "*y" }, /* EQNSYM_eta */
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{ { "gamma", 5 }, "*g" }, /* EQNSYM_gamma */
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{ { "iota", 4 }, "*i" }, /* EQNSYM_iota */
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{ { "kappa", 5 }, "*k" }, /* EQNSYM_kappa */
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{ { "lambda", 6 }, "*l" }, /* EQNSYM_lambda */
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{ { "mu", 2 }, "*m" }, /* EQNSYM_mu */
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{ { "nu", 2 }, "*n" }, /* EQNSYM_nu */
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{ { "omega", 5 }, "*w" }, /* EQNSYM_omega */
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{ { "omicron", 7 }, "*o" }, /* EQNSYM_omicron */
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{ { "phi", 3 }, "*f" }, /* EQNSYM_phi */
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{ { "pi", 2 }, "*p" }, /* EQNSYM_pi */
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{ { "psi", 2 }, "*q" }, /* EQNSYM_psi */
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{ { "rho", 3 }, "*r" }, /* EQNSYM_rho */
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{ { "sigma", 5 }, "*s" }, /* EQNSYM_sigma */
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{ { "tau", 3 }, "*t" }, /* EQNSYM_tau */
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{ { "theta", 5 }, "*h" }, /* EQNSYM_theta */
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{ { "upsilon", 7 }, "*u" }, /* EQNSYM_upsilon */
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{ { "xi", 2 }, "*c" }, /* EQNSYM_xi */
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{ { "zeta", 4 }, "*z" }, /* EQNSYM_zeta */
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{ { "DELTA", 5 }, "*D" }, /* EQNSYM_DELTA */
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{ { "GAMMA", 5 }, "*G" }, /* EQNSYM_GAMMA */
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{ { "LAMBDA", 6 }, "*L" }, /* EQNSYM_LAMBDA */
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{ { "OMEGA", 5 }, "*W" }, /* EQNSYM_OMEGA */
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{ { "PHI", 3 }, "*F" }, /* EQNSYM_PHI */
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{ { "PI", 2 }, "*P" }, /* EQNSYM_PI */
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{ { "PSI", 3 }, "*Q" }, /* EQNSYM_PSI */
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{ { "SIGMA", 5 }, "*S" }, /* EQNSYM_SIGMA */
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{ { "THETA", 5 }, "*H" }, /* EQNSYM_THETA */
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{ { "UPSILON", 7 }, "*U" }, /* EQNSYM_UPSILON */
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{ { "XI", 2 }, "*C" }, /* EQNSYM_XI */
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{ { "inter", 5 }, "ca" }, /* EQNSYM_inter */
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{ { "union", 5 }, "cu" }, /* EQNSYM_union */
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{ { "prod", 4 }, "product" }, /* EQNSYM_prod */
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{ { "int", 3 }, "integral" }, /* EQNSYM_int */
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{ { "sum", 3 }, "sum" }, /* EQNSYM_sum */
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{ { "grad", 4 }, "gr" }, /* EQNSYM_grad */
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{ { "del", 3 }, "gr" }, /* EQNSYM_del */
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{ { "times", 5 }, "mu" }, /* EQNSYM_times */
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{ { "cdot", 4 }, "pc" }, /* EQNSYM_cdot */
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{ { "nothing", 7 }, "&" }, /* EQNSYM_nothing */
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{ { "approx", 6 }, "~~" }, /* EQNSYM_approx */
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{ { "prime", 5 }, "aq" }, /* EQNSYM_prime */
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{ { "half", 4 }, "12" }, /* EQNSYM_half */
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{ { "partial", 7 }, "pd" }, /* EQNSYM_partial */
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{ { "inf", 3 }, "if" }, /* EQNSYM_inf */
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{ { ">>", 2 }, ">>" }, /* EQNSYM_muchgreat */
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{ { "<<", 2 }, "<<" }, /* EQNSYM_muchless */
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{ { "<-", 2 }, "<-" }, /* EQNSYM_larrow */
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{ { "->", 2 }, "->" }, /* EQNSYM_rarrow */
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{ { "+-", 2 }, "+-" }, /* EQNSYM_pm */
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{ { "!=", 2 }, "!=" }, /* EQNSYM_nequal */
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{ { "==", 2 }, "==" }, /* EQNSYM_equiv */
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{ { "<=", 2 }, "<=" }, /* EQNSYM_lessequal */
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{ { ">=", 2 }, ">=" }, /* EQNSYM_moreequal */
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};
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/* ARGSUSED */
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enum rofferr
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eqn_read(struct eqn_node **epp, int ln,
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const char *p, int pos, int *offs)
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{
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size_t sz;
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struct eqn_node *ep;
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enum rofferr er;
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ep = *epp;
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/*
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* If we're the terminating mark, unset our equation status and
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* validate the full equation.
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*/
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if (0 == strncmp(p, ".EN", 3)) {
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er = eqn_end(epp);
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p += 3;
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while (' ' == *p || '\t' == *p)
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p++;
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if ('\0' == *p)
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return(er);
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mandoc_msg(MANDOCERR_ARGSLOST, ep->parse, ln, pos, NULL);
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return(er);
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}
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/*
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* Build up the full string, replacing all newlines with regular
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* whitespace.
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*/
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sz = strlen(p + pos) + 1;
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ep->data = mandoc_realloc(ep->data, ep->sz + sz + 1);
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/* First invocation: nil terminate the string. */
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if (0 == ep->sz)
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*ep->data = '\0';
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ep->sz += sz;
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strlcat(ep->data, p + pos, ep->sz + 1);
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strlcat(ep->data, " ", ep->sz + 1);
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return(ROFF_IGN);
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}
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struct eqn_node *
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eqn_alloc(const char *name, int pos, int line, struct mparse *parse)
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{
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struct eqn_node *p;
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size_t sz;
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const char *end;
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p = mandoc_calloc(1, sizeof(struct eqn_node));
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if (name && '\0' != *name) {
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sz = strlen(name);
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assert(sz);
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do {
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sz--;
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end = name + (int)sz;
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} while (' ' == *end || '\t' == *end);
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p->eqn.name = mandoc_strndup(name, sz + 1);
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}
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p->parse = parse;
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p->eqn.ln = line;
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p->eqn.pos = pos;
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p->gsize = EQN_DEFSIZE;
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return(p);
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}
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enum rofferr
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eqn_end(struct eqn_node **epp)
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{
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struct eqn_node *ep;
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struct eqn_box *root;
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enum eqn_rest c;
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ep = *epp;
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*epp = NULL;
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ep->eqn.root = mandoc_calloc(1, sizeof(struct eqn_box));
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root = ep->eqn.root;
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root->type = EQN_ROOT;
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if (0 == ep->sz)
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return(ROFF_IGN);
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if (EQN_DESCOPE == (c = eqn_eqn(ep, root))) {
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EQN_MSG(MANDOCERR_EQNNSCOPE, ep);
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c = EQN_ERR;
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}
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return(EQN_EOF == c ? ROFF_EQN : ROFF_IGN);
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}
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static enum eqn_rest
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eqn_eqn(struct eqn_node *ep, struct eqn_box *last)
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{
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struct eqn_box *bp;
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enum eqn_rest c;
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bp = eqn_box_alloc(ep, last);
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bp->type = EQN_SUBEXPR;
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while (EQN_OK == (c = eqn_box(ep, bp)))
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/* Spin! */ ;
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return(c);
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}
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static enum eqn_rest
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eqn_matrix(struct eqn_node *ep, struct eqn_box *last)
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{
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struct eqn_box *bp;
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const char *start;
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size_t sz;
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enum eqn_rest c;
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bp = eqn_box_alloc(ep, last);
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bp->type = EQN_MATRIX;
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if (NULL == (start = eqn_nexttok(ep, &sz))) {
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EQN_MSG(MANDOCERR_EQNEOF, ep);
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return(EQN_ERR);
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}
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if ( ! STRNEQ(start, sz, "{", 1)) {
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EQN_MSG(MANDOCERR_EQNSYNT, ep);
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return(EQN_ERR);
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}
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while (EQN_OK == (c = eqn_box(ep, bp)))
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switch (bp->last->pile) {
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case (EQNPILE_LCOL):
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/* FALLTHROUGH */
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case (EQNPILE_CCOL):
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/* FALLTHROUGH */
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case (EQNPILE_RCOL):
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continue;
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default:
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EQN_MSG(MANDOCERR_EQNSYNT, ep);
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return(EQN_ERR);
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};
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if (EQN_DESCOPE != c) {
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if (EQN_EOF == c)
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EQN_MSG(MANDOCERR_EQNEOF, ep);
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return(EQN_ERR);
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}
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eqn_rewind(ep);
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start = eqn_nexttok(ep, &sz);
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assert(start);
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if (STRNEQ(start, sz, "}", 1))
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return(EQN_OK);
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EQN_MSG(MANDOCERR_EQNBADSCOPE, ep);
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return(EQN_ERR);
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}
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static enum eqn_rest
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eqn_list(struct eqn_node *ep, struct eqn_box *last)
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{
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struct eqn_box *bp;
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const char *start;
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size_t sz;
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enum eqn_rest c;
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bp = eqn_box_alloc(ep, last);
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bp->type = EQN_LIST;
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if (NULL == (start = eqn_nexttok(ep, &sz))) {
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EQN_MSG(MANDOCERR_EQNEOF, ep);
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return(EQN_ERR);
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}
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if ( ! STRNEQ(start, sz, "{", 1)) {
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EQN_MSG(MANDOCERR_EQNSYNT, ep);
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return(EQN_ERR);
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}
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while (EQN_DESCOPE == (c = eqn_eqn(ep, bp))) {
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eqn_rewind(ep);
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start = eqn_nexttok(ep, &sz);
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assert(start);
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if ( ! STRNEQ(start, sz, "above", 5))
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break;
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}
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|
|
|
if (EQN_DESCOPE != c) {
|
|
if (EQN_ERR != c)
|
|
EQN_MSG(MANDOCERR_EQNSCOPE, ep);
|
|
return(EQN_ERR);
|
|
}
|
|
|
|
eqn_rewind(ep);
|
|
start = eqn_nexttok(ep, &sz);
|
|
assert(start);
|
|
if (STRNEQ(start, sz, "}", 1))
|
|
return(EQN_OK);
|
|
|
|
EQN_MSG(MANDOCERR_EQNBADSCOPE, ep);
|
|
return(EQN_ERR);
|
|
}
|
|
|
|
static enum eqn_rest
|
|
eqn_box(struct eqn_node *ep, struct eqn_box *last)
|
|
{
|
|
size_t sz;
|
|
const char *start;
|
|
char *left;
|
|
char sym[64];
|
|
enum eqn_rest c;
|
|
int i, size;
|
|
struct eqn_box *bp;
|
|
|
|
if (NULL == (start = eqn_nexttok(ep, &sz)))
|
|
return(EQN_EOF);
|
|
|
|
if (STRNEQ(start, sz, "}", 1))
|
|
return(EQN_DESCOPE);
|
|
else if (STRNEQ(start, sz, "right", 5))
|
|
return(EQN_DESCOPE);
|
|
else if (STRNEQ(start, sz, "above", 5))
|
|
return(EQN_DESCOPE);
|
|
else if (STRNEQ(start, sz, "mark", 4))
|
|
return(EQN_OK);
|
|
else if (STRNEQ(start, sz, "lineup", 6))
|
|
return(EQN_OK);
|
|
|
|
for (i = 0; i < (int)EQN__MAX; i++) {
|
|
if ( ! EQNSTREQ(&eqnparts[i].str, start, sz))
|
|
continue;
|
|
return((*eqnparts[i].fp)(ep) ?
|
|
EQN_OK : EQN_ERR);
|
|
}
|
|
|
|
if (STRNEQ(start, sz, "{", 1)) {
|
|
if (EQN_DESCOPE != (c = eqn_eqn(ep, last))) {
|
|
if (EQN_ERR != c)
|
|
EQN_MSG(MANDOCERR_EQNSCOPE, ep);
|
|
return(EQN_ERR);
|
|
}
|
|
eqn_rewind(ep);
|
|
start = eqn_nexttok(ep, &sz);
|
|
assert(start);
|
|
if (STRNEQ(start, sz, "}", 1))
|
|
return(EQN_OK);
|
|
EQN_MSG(MANDOCERR_EQNBADSCOPE, ep);
|
|
return(EQN_ERR);
|
|
}
|
|
|
|
for (i = 0; i < (int)EQNPILE__MAX; i++) {
|
|
if ( ! EQNSTREQ(&eqnpiles[i], start, sz))
|
|
continue;
|
|
if (EQN_OK == (c = eqn_list(ep, last)))
|
|
last->last->pile = (enum eqn_pilet)i;
|
|
return(c);
|
|
}
|
|
|
|
if (STRNEQ(start, sz, "matrix", 6))
|
|
return(eqn_matrix(ep, last));
|
|
|
|
if (STRNEQ(start, sz, "left", 4)) {
|
|
if (NULL == (start = eqn_nexttok(ep, &sz))) {
|
|
EQN_MSG(MANDOCERR_EQNEOF, ep);
|
|
return(EQN_ERR);
|
|
}
|
|
left = mandoc_strndup(start, sz);
|
|
c = eqn_eqn(ep, last);
|
|
if (last->last)
|
|
last->last->left = left;
|
|
else
|
|
free(left);
|
|
if (EQN_DESCOPE != c)
|
|
return(c);
|
|
assert(last->last);
|
|
eqn_rewind(ep);
|
|
start = eqn_nexttok(ep, &sz);
|
|
assert(start);
|
|
if ( ! STRNEQ(start, sz, "right", 5))
|
|
return(EQN_DESCOPE);
|
|
if (NULL == (start = eqn_nexttok(ep, &sz))) {
|
|
EQN_MSG(MANDOCERR_EQNEOF, ep);
|
|
return(EQN_ERR);
|
|
}
|
|
last->last->right = mandoc_strndup(start, sz);
|
|
return(EQN_OK);
|
|
}
|
|
|
|
for (i = 0; i < (int)EQNPOS__MAX; i++) {
|
|
if ( ! EQNSTREQ(&eqnposs[i], start, sz))
|
|
continue;
|
|
if (NULL == last->last) {
|
|
EQN_MSG(MANDOCERR_EQNSYNT, ep);
|
|
return(EQN_ERR);
|
|
}
|
|
last->last->pos = (enum eqn_post)i;
|
|
if (EQN_EOF == (c = eqn_box(ep, last))) {
|
|
EQN_MSG(MANDOCERR_EQNEOF, ep);
|
|
return(EQN_ERR);
|
|
}
|
|
return(c);
|
|
}
|
|
|
|
for (i = 0; i < (int)EQNMARK__MAX; i++) {
|
|
if ( ! EQNSTREQ(&eqnmarks[i], start, sz))
|
|
continue;
|
|
if (NULL == last->last) {
|
|
EQN_MSG(MANDOCERR_EQNSYNT, ep);
|
|
return(EQN_ERR);
|
|
}
|
|
last->last->mark = (enum eqn_markt)i;
|
|
if (EQN_EOF == (c = eqn_box(ep, last))) {
|
|
EQN_MSG(MANDOCERR_EQNEOF, ep);
|
|
return(EQN_ERR);
|
|
}
|
|
return(c);
|
|
}
|
|
|
|
for (i = 0; i < (int)EQNFONT__MAX; i++) {
|
|
if ( ! EQNSTREQ(&eqnfonts[i], start, sz))
|
|
continue;
|
|
if (EQN_EOF == (c = eqn_box(ep, last))) {
|
|
EQN_MSG(MANDOCERR_EQNEOF, ep);
|
|
return(EQN_ERR);
|
|
} else if (EQN_OK == c)
|
|
last->last->font = (enum eqn_fontt)i;
|
|
return(c);
|
|
}
|
|
|
|
if (STRNEQ(start, sz, "size", 4)) {
|
|
if (NULL == (start = eqn_nexttok(ep, &sz))) {
|
|
EQN_MSG(MANDOCERR_EQNEOF, ep);
|
|
return(EQN_ERR);
|
|
}
|
|
size = mandoc_strntoi(start, sz, 10);
|
|
if (EQN_EOF == (c = eqn_box(ep, last))) {
|
|
EQN_MSG(MANDOCERR_EQNEOF, ep);
|
|
return(EQN_ERR);
|
|
} else if (EQN_OK != c)
|
|
return(c);
|
|
last->last->size = size;
|
|
}
|
|
|
|
bp = eqn_box_alloc(ep, last);
|
|
bp->type = EQN_TEXT;
|
|
for (i = 0; i < (int)EQNSYM__MAX; i++)
|
|
if (EQNSTREQ(&eqnsyms[i].str, start, sz)) {
|
|
sym[63] = '\0';
|
|
snprintf(sym, 62, "\\[%s]", eqnsyms[i].sym);
|
|
bp->text = mandoc_strdup(sym);
|
|
return(EQN_OK);
|
|
}
|
|
|
|
bp->text = mandoc_strndup(start, sz);
|
|
return(EQN_OK);
|
|
}
|
|
|
|
void
|
|
eqn_free(struct eqn_node *p)
|
|
{
|
|
int i;
|
|
|
|
eqn_box_free(p->eqn.root);
|
|
|
|
for (i = 0; i < (int)p->defsz; i++) {
|
|
free(p->defs[i].key);
|
|
free(p->defs[i].val);
|
|
}
|
|
|
|
free(p->eqn.name);
|
|
free(p->data);
|
|
free(p->defs);
|
|
free(p);
|
|
}
|
|
|
|
static struct eqn_box *
|
|
eqn_box_alloc(struct eqn_node *ep, struct eqn_box *parent)
|
|
{
|
|
struct eqn_box *bp;
|
|
|
|
bp = mandoc_calloc(1, sizeof(struct eqn_box));
|
|
bp->parent = parent;
|
|
bp->size = ep->gsize;
|
|
|
|
if (NULL == parent->first)
|
|
parent->first = bp;
|
|
else
|
|
parent->last->next = bp;
|
|
|
|
parent->last = bp;
|
|
return(bp);
|
|
}
|
|
|
|
static void
|
|
eqn_box_free(struct eqn_box *bp)
|
|
{
|
|
|
|
if (bp->first)
|
|
eqn_box_free(bp->first);
|
|
if (bp->next)
|
|
eqn_box_free(bp->next);
|
|
|
|
free(bp->text);
|
|
free(bp->left);
|
|
free(bp->right);
|
|
free(bp);
|
|
}
|
|
|
|
static const char *
|
|
eqn_nextrawtok(struct eqn_node *ep, size_t *sz)
|
|
{
|
|
|
|
return(eqn_next(ep, '"', sz, 0));
|
|
}
|
|
|
|
static const char *
|
|
eqn_nexttok(struct eqn_node *ep, size_t *sz)
|
|
{
|
|
|
|
return(eqn_next(ep, '"', sz, 1));
|
|
}
|
|
|
|
static void
|
|
eqn_rewind(struct eqn_node *ep)
|
|
{
|
|
|
|
ep->cur = ep->rew;
|
|
}
|
|
|
|
static const char *
|
|
eqn_next(struct eqn_node *ep, char quote, size_t *sz, int repl)
|
|
{
|
|
char *start, *next;
|
|
int q, diff, lim;
|
|
size_t ssz, dummy;
|
|
struct eqn_def *def;
|
|
|
|
if (NULL == sz)
|
|
sz = &dummy;
|
|
|
|
lim = 0;
|
|
ep->rew = ep->cur;
|
|
again:
|
|
/* Prevent self-definitions. */
|
|
|
|
if (lim >= EQN_NEST_MAX) {
|
|
EQN_MSG(MANDOCERR_ROFFLOOP, ep);
|
|
return(NULL);
|
|
}
|
|
|
|
ep->cur = ep->rew;
|
|
start = &ep->data[(int)ep->cur];
|
|
q = 0;
|
|
|
|
if ('\0' == *start)
|
|
return(NULL);
|
|
|
|
if (quote == *start) {
|
|
ep->cur++;
|
|
q = 1;
|
|
}
|
|
|
|
start = &ep->data[(int)ep->cur];
|
|
|
|
if ( ! q) {
|
|
if ('{' == *start || '}' == *start)
|
|
ssz = 1;
|
|
else
|
|
ssz = strcspn(start + 1, " ^~\"{}\t") + 1;
|
|
next = start + (int)ssz;
|
|
if ('\0' == *next)
|
|
next = NULL;
|
|
} else
|
|
next = strchr(start, quote);
|
|
|
|
if (NULL != next) {
|
|
*sz = (size_t)(next - start);
|
|
ep->cur += *sz;
|
|
if (q)
|
|
ep->cur++;
|
|
while (' ' == ep->data[(int)ep->cur] ||
|
|
'\t' == ep->data[(int)ep->cur] ||
|
|
'^' == ep->data[(int)ep->cur] ||
|
|
'~' == ep->data[(int)ep->cur])
|
|
ep->cur++;
|
|
} else {
|
|
if (q)
|
|
EQN_MSG(MANDOCERR_BADQUOTE, ep);
|
|
next = strchr(start, '\0');
|
|
*sz = (size_t)(next - start);
|
|
ep->cur += *sz;
|
|
}
|
|
|
|
/* Quotes aren't expanded for values. */
|
|
|
|
if (q || ! repl)
|
|
return(start);
|
|
|
|
if (NULL != (def = eqn_def_find(ep, start, *sz))) {
|
|
diff = def->valsz - *sz;
|
|
|
|
if (def->valsz > *sz) {
|
|
ep->sz += diff;
|
|
ep->data = mandoc_realloc(ep->data, ep->sz + 1);
|
|
ep->data[ep->sz] = '\0';
|
|
start = &ep->data[(int)ep->rew];
|
|
}
|
|
|
|
diff = def->valsz - *sz;
|
|
memmove(start + *sz + diff, start + *sz,
|
|
(strlen(start) - *sz) + 1);
|
|
memcpy(start, def->val, def->valsz);
|
|
goto again;
|
|
}
|
|
|
|
return(start);
|
|
}
|
|
|
|
static int
|
|
eqn_do_ign1(struct eqn_node *ep)
|
|
{
|
|
|
|
if (NULL == eqn_nextrawtok(ep, NULL))
|
|
EQN_MSG(MANDOCERR_EQNEOF, ep);
|
|
else
|
|
return(1);
|
|
|
|
return(0);
|
|
}
|
|
|
|
static int
|
|
eqn_do_ign2(struct eqn_node *ep)
|
|
{
|
|
|
|
if (NULL == eqn_nextrawtok(ep, NULL))
|
|
EQN_MSG(MANDOCERR_EQNEOF, ep);
|
|
else if (NULL == eqn_nextrawtok(ep, NULL))
|
|
EQN_MSG(MANDOCERR_EQNEOF, ep);
|
|
else
|
|
return(1);
|
|
|
|
return(0);
|
|
}
|
|
|
|
static int
|
|
eqn_do_tdefine(struct eqn_node *ep)
|
|
{
|
|
|
|
if (NULL == eqn_nextrawtok(ep, NULL))
|
|
EQN_MSG(MANDOCERR_EQNEOF, ep);
|
|
else if (NULL == eqn_next(ep, ep->data[(int)ep->cur], NULL, 0))
|
|
EQN_MSG(MANDOCERR_EQNEOF, ep);
|
|
else
|
|
return(1);
|
|
|
|
return(0);
|
|
}
|
|
|
|
static int
|
|
eqn_do_define(struct eqn_node *ep)
|
|
{
|
|
const char *start;
|
|
size_t sz;
|
|
struct eqn_def *def;
|
|
int i;
|
|
|
|
if (NULL == (start = eqn_nextrawtok(ep, &sz))) {
|
|
EQN_MSG(MANDOCERR_EQNEOF, ep);
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* Search for a key that already exists.
|
|
* Create a new key if none is found.
|
|
*/
|
|
|
|
if (NULL == (def = eqn_def_find(ep, start, sz))) {
|
|
/* Find holes in string array. */
|
|
for (i = 0; i < (int)ep->defsz; i++)
|
|
if (0 == ep->defs[i].keysz)
|
|
break;
|
|
|
|
if (i == (int)ep->defsz) {
|
|
ep->defsz++;
|
|
ep->defs = mandoc_realloc
|
|
(ep->defs, ep->defsz *
|
|
sizeof(struct eqn_def));
|
|
ep->defs[i].key = ep->defs[i].val = NULL;
|
|
}
|
|
|
|
ep->defs[i].keysz = sz;
|
|
ep->defs[i].key = mandoc_realloc
|
|
(ep->defs[i].key, sz + 1);
|
|
|
|
memcpy(ep->defs[i].key, start, sz);
|
|
ep->defs[i].key[(int)sz] = '\0';
|
|
def = &ep->defs[i];
|
|
}
|
|
|
|
start = eqn_next(ep, ep->data[(int)ep->cur], &sz, 0);
|
|
|
|
if (NULL == start) {
|
|
EQN_MSG(MANDOCERR_EQNEOF, ep);
|
|
return(0);
|
|
}
|
|
|
|
def->valsz = sz;
|
|
def->val = mandoc_realloc(def->val, sz + 1);
|
|
memcpy(def->val, start, sz);
|
|
def->val[(int)sz] = '\0';
|
|
return(1);
|
|
}
|
|
|
|
static int
|
|
eqn_do_gfont(struct eqn_node *ep)
|
|
{
|
|
|
|
if (NULL == eqn_nextrawtok(ep, NULL)) {
|
|
EQN_MSG(MANDOCERR_EQNEOF, ep);
|
|
return(0);
|
|
}
|
|
return(1);
|
|
}
|
|
|
|
static int
|
|
eqn_do_gsize(struct eqn_node *ep)
|
|
{
|
|
const char *start;
|
|
size_t sz;
|
|
|
|
if (NULL == (start = eqn_nextrawtok(ep, &sz))) {
|
|
EQN_MSG(MANDOCERR_EQNEOF, ep);
|
|
return(0);
|
|
}
|
|
ep->gsize = mandoc_strntoi(start, sz, 10);
|
|
return(1);
|
|
}
|
|
|
|
static int
|
|
eqn_do_undef(struct eqn_node *ep)
|
|
{
|
|
const char *start;
|
|
struct eqn_def *def;
|
|
size_t sz;
|
|
|
|
if (NULL == (start = eqn_nextrawtok(ep, &sz))) {
|
|
EQN_MSG(MANDOCERR_EQNEOF, ep);
|
|
return(0);
|
|
} else if (NULL != (def = eqn_def_find(ep, start, sz)))
|
|
def->keysz = 0;
|
|
|
|
return(1);
|
|
}
|
|
|
|
static struct eqn_def *
|
|
eqn_def_find(struct eqn_node *ep, const char *key, size_t sz)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < (int)ep->defsz; i++)
|
|
if (ep->defs[i].keysz && STRNEQ(ep->defs[i].key,
|
|
ep->defs[i].keysz, key, sz))
|
|
return(&ep->defs[i]);
|
|
|
|
return(NULL);
|
|
}
|