1125 lines
27 KiB
C
1125 lines
27 KiB
C
/* $Id: eqn.c,v 1.83 2018/12/14 06:33:14 schwarze Exp $ */
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/*
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* Copyright (c) 2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
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* Copyright (c) 2014, 2015, 2017, 2018 Ingo Schwarze <schwarze@openbsd.org>
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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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#include "config.h"
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#include <sys/types.h>
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#include <assert.h>
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#include <ctype.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_aux.h"
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#include "mandoc.h"
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#include "roff.h"
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#include "eqn.h"
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#include "libmandoc.h"
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#include "eqn_parse.h"
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#define EQN_NEST_MAX 128 /* maximum nesting of defines */
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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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enum eqn_tok {
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EQN_TOK_DYAD = 0,
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EQN_TOK_VEC,
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EQN_TOK_UNDER,
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EQN_TOK_BAR,
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EQN_TOK_TILDE,
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EQN_TOK_HAT,
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EQN_TOK_DOT,
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EQN_TOK_DOTDOT,
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EQN_TOK_FWD,
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EQN_TOK_BACK,
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EQN_TOK_DOWN,
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EQN_TOK_UP,
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EQN_TOK_FAT,
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EQN_TOK_ROMAN,
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EQN_TOK_ITALIC,
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EQN_TOK_BOLD,
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EQN_TOK_SIZE,
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EQN_TOK_SUB,
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EQN_TOK_SUP,
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EQN_TOK_SQRT,
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EQN_TOK_OVER,
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EQN_TOK_FROM,
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EQN_TOK_TO,
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EQN_TOK_BRACE_OPEN,
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EQN_TOK_BRACE_CLOSE,
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EQN_TOK_GSIZE,
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EQN_TOK_GFONT,
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EQN_TOK_MARK,
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EQN_TOK_LINEUP,
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EQN_TOK_LEFT,
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EQN_TOK_RIGHT,
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EQN_TOK_PILE,
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EQN_TOK_LPILE,
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EQN_TOK_RPILE,
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EQN_TOK_CPILE,
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EQN_TOK_MATRIX,
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EQN_TOK_CCOL,
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EQN_TOK_LCOL,
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EQN_TOK_RCOL,
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EQN_TOK_DELIM,
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EQN_TOK_DEFINE,
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EQN_TOK_TDEFINE,
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EQN_TOK_NDEFINE,
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EQN_TOK_UNDEF,
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EQN_TOK_ABOVE,
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EQN_TOK__MAX,
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EQN_TOK_FUNC,
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EQN_TOK_QUOTED,
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EQN_TOK_SYM,
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EQN_TOK_EOF
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};
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static const char *eqn_toks[EQN_TOK__MAX] = {
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"dyad", /* EQN_TOK_DYAD */
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"vec", /* EQN_TOK_VEC */
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"under", /* EQN_TOK_UNDER */
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"bar", /* EQN_TOK_BAR */
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"tilde", /* EQN_TOK_TILDE */
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"hat", /* EQN_TOK_HAT */
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"dot", /* EQN_TOK_DOT */
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"dotdot", /* EQN_TOK_DOTDOT */
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"fwd", /* EQN_TOK_FWD * */
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"back", /* EQN_TOK_BACK */
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"down", /* EQN_TOK_DOWN */
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"up", /* EQN_TOK_UP */
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"fat", /* EQN_TOK_FAT */
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"roman", /* EQN_TOK_ROMAN */
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"italic", /* EQN_TOK_ITALIC */
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"bold", /* EQN_TOK_BOLD */
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"size", /* EQN_TOK_SIZE */
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"sub", /* EQN_TOK_SUB */
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"sup", /* EQN_TOK_SUP */
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"sqrt", /* EQN_TOK_SQRT */
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"over", /* EQN_TOK_OVER */
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"from", /* EQN_TOK_FROM */
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"to", /* EQN_TOK_TO */
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"{", /* EQN_TOK_BRACE_OPEN */
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"}", /* EQN_TOK_BRACE_CLOSE */
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"gsize", /* EQN_TOK_GSIZE */
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"gfont", /* EQN_TOK_GFONT */
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"mark", /* EQN_TOK_MARK */
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"lineup", /* EQN_TOK_LINEUP */
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"left", /* EQN_TOK_LEFT */
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"right", /* EQN_TOK_RIGHT */
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"pile", /* EQN_TOK_PILE */
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"lpile", /* EQN_TOK_LPILE */
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"rpile", /* EQN_TOK_RPILE */
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"cpile", /* EQN_TOK_CPILE */
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"matrix", /* EQN_TOK_MATRIX */
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"ccol", /* EQN_TOK_CCOL */
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"lcol", /* EQN_TOK_LCOL */
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"rcol", /* EQN_TOK_RCOL */
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"delim", /* EQN_TOK_DELIM */
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"define", /* EQN_TOK_DEFINE */
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"tdefine", /* EQN_TOK_TDEFINE */
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"ndefine", /* EQN_TOK_NDEFINE */
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"undef", /* EQN_TOK_UNDEF */
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"above", /* EQN_TOK_ABOVE */
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};
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static const char *const eqn_func[] = {
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"acos", "acsc", "and", "arc", "asec", "asin", "atan",
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"cos", "cosh", "coth", "csc", "det", "exp", "for",
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"if", "lim", "ln", "log", "max", "min",
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"sec", "sin", "sinh", "tan", "tanh", "Im", "Re",
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};
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enum eqn_symt {
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EQNSYM_alpha = 0,
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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_minus,
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EQNSYM__MAX
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};
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struct eqnsym {
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const char *str;
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const char *sym;
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};
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static const struct eqnsym eqnsyms[EQNSYM__MAX] = {
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{ "alpha", "*a" }, /* EQNSYM_alpha */
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{ "beta", "*b" }, /* EQNSYM_beta */
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{ "chi", "*x" }, /* EQNSYM_chi */
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{ "delta", "*d" }, /* EQNSYM_delta */
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{ "epsilon", "*e" }, /* EQNSYM_epsilon */
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{ "eta", "*y" }, /* EQNSYM_eta */
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{ "gamma", "*g" }, /* EQNSYM_gamma */
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{ "iota", "*i" }, /* EQNSYM_iota */
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{ "kappa", "*k" }, /* EQNSYM_kappa */
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{ "lambda", "*l" }, /* EQNSYM_lambda */
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{ "mu", "*m" }, /* EQNSYM_mu */
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{ "nu", "*n" }, /* EQNSYM_nu */
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{ "omega", "*w" }, /* EQNSYM_omega */
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{ "omicron", "*o" }, /* EQNSYM_omicron */
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{ "phi", "*f" }, /* EQNSYM_phi */
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{ "pi", "*p" }, /* EQNSYM_pi */
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{ "psi", "*q" }, /* EQNSYM_psi */
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{ "rho", "*r" }, /* EQNSYM_rho */
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{ "sigma", "*s" }, /* EQNSYM_sigma */
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{ "tau", "*t" }, /* EQNSYM_tau */
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{ "theta", "*h" }, /* EQNSYM_theta */
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{ "upsilon", "*u" }, /* EQNSYM_upsilon */
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{ "xi", "*c" }, /* EQNSYM_xi */
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{ "zeta", "*z" }, /* EQNSYM_zeta */
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{ "DELTA", "*D" }, /* EQNSYM_DELTA */
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{ "GAMMA", "*G" }, /* EQNSYM_GAMMA */
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{ "LAMBDA", "*L" }, /* EQNSYM_LAMBDA */
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{ "OMEGA", "*W" }, /* EQNSYM_OMEGA */
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{ "PHI", "*F" }, /* EQNSYM_PHI */
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{ "PI", "*P" }, /* EQNSYM_PI */
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{ "PSI", "*Q" }, /* EQNSYM_PSI */
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{ "SIGMA", "*S" }, /* EQNSYM_SIGMA */
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{ "THETA", "*H" }, /* EQNSYM_THETA */
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{ "UPSILON", "*U" }, /* EQNSYM_UPSILON */
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{ "XI", "*C" }, /* EQNSYM_XI */
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{ "inter", "ca" }, /* EQNSYM_inter */
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{ "union", "cu" }, /* EQNSYM_union */
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{ "prod", "product" }, /* EQNSYM_prod */
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{ "int", "integral" }, /* EQNSYM_int */
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{ "sum", "sum" }, /* EQNSYM_sum */
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{ "grad", "gr" }, /* EQNSYM_grad */
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{ "del", "gr" }, /* EQNSYM_del */
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{ "times", "mu" }, /* EQNSYM_times */
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{ "cdot", "pc" }, /* EQNSYM_cdot */
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{ "nothing", "&" }, /* EQNSYM_nothing */
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{ "approx", "~~" }, /* EQNSYM_approx */
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{ "prime", "fm" }, /* EQNSYM_prime */
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{ "half", "12" }, /* EQNSYM_half */
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{ "partial", "pd" }, /* EQNSYM_partial */
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{ "inf", "if" }, /* 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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{ "-", "mi" }, /* EQNSYM_minus */
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};
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enum parse_mode {
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MODE_QUOTED,
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MODE_NOSUB,
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MODE_SUB,
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MODE_TOK
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};
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struct eqn_def {
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char *key;
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size_t keysz;
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char *val;
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size_t valsz;
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};
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static struct eqn_box *eqn_box_alloc(struct eqn_node *, struct eqn_box *);
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static struct eqn_box *eqn_box_makebinary(struct eqn_node *,
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struct eqn_box *);
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static void eqn_def(struct eqn_node *);
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static struct eqn_def *eqn_def_find(struct eqn_node *);
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static void eqn_delim(struct eqn_node *);
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static enum eqn_tok eqn_next(struct eqn_node *, enum parse_mode);
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static void eqn_undef(struct eqn_node *);
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struct eqn_node *
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eqn_alloc(void)
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{
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struct eqn_node *ep;
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ep = mandoc_calloc(1, sizeof(*ep));
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ep->gsize = EQN_DEFSIZE;
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return ep;
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}
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void
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eqn_reset(struct eqn_node *ep)
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{
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free(ep->data);
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ep->data = ep->start = ep->end = NULL;
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ep->sz = ep->toksz = 0;
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}
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void
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eqn_read(struct eqn_node *ep, const char *p)
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{
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char *cp;
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if (ep->data == NULL) {
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ep->sz = strlen(p);
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ep->data = mandoc_strdup(p);
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} else {
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ep->sz = mandoc_asprintf(&cp, "%s %s", ep->data, p);
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free(ep->data);
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ep->data = cp;
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}
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ep->sz += 1;
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}
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/*
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* Find the key "key" of the give size within our eqn-defined values.
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*/
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static struct eqn_def *
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eqn_def_find(struct eqn_node *ep)
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{
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int i;
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for (i = 0; i < (int)ep->defsz; i++)
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if (ep->defs[i].keysz && STRNEQ(ep->defs[i].key,
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ep->defs[i].keysz, ep->start, ep->toksz))
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return &ep->defs[i];
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return NULL;
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}
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/*
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* Parse a token from the input text. The modes are:
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* MODE_QUOTED: Use *ep->start as the delimiter; the token ends
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* before its next occurence. Do not interpret the token in any
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* way and return EQN_TOK_QUOTED. All other modes behave like
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* MODE_QUOTED when *ep->start is '"'.
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* MODE_NOSUB: If *ep->start is a curly brace, the token ends after it;
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* otherwise, it ends before the next whitespace or brace.
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* Do not interpret the token and return EQN_TOK__MAX.
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* MODE_SUB: Like MODE_NOSUB, but try to interpret the token as an
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* alias created with define. If it is an alias, replace it with
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* its string value and reparse.
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* MODE_TOK: Like MODE_SUB, but also check the token against the list
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* of tokens, and if there is a match, return that token. Otherwise,
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* if the token matches a symbol, return EQN_TOK_SYM; if it matches
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* a function name, EQN_TOK_FUNC, or else EQN_TOK__MAX. Except for
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* a token match, *ep->start is set to an allocated string that the
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* caller is expected to free.
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* All modes skip whitespace following the end of the token.
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*/
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static enum eqn_tok
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eqn_next(struct eqn_node *ep, enum parse_mode mode)
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{
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static int last_len, lim;
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struct eqn_def *def;
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size_t start;
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int diff, i, quoted;
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enum eqn_tok tok;
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/*
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* Reset the recursion counter after advancing
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* beyond the end of the previous substitution.
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*/
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if (ep->end - ep->data >= last_len)
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lim = 0;
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ep->start = ep->end;
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quoted = mode == MODE_QUOTED;
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for (;;) {
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switch (*ep->start) {
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case '\0':
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ep->toksz = 0;
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return EQN_TOK_EOF;
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case '"':
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quoted = 1;
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break;
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default:
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break;
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}
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if (quoted) {
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ep->end = strchr(ep->start + 1, *ep->start);
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ep->start++; /* Skip opening quote. */
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if (ep->end == NULL) {
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mandoc_msg(MANDOCERR_ARG_QUOTE,
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ep->node->line, ep->node->pos, NULL);
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ep->end = strchr(ep->start, '\0');
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}
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} else {
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ep->end = ep->start + 1;
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if (*ep->start != '{' && *ep->start != '}')
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ep->end += strcspn(ep->end, " ^~\"{}\t");
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}
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ep->toksz = ep->end - ep->start;
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if (quoted && *ep->end != '\0')
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ep->end++; /* Skip closing quote. */
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while (*ep->end != '\0' && strchr(" \t^~", *ep->end) != NULL)
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ep->end++;
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if (quoted) /* Cannot return, may have to strndup. */
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break;
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if (mode == MODE_NOSUB)
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return EQN_TOK__MAX;
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if ((def = eqn_def_find(ep)) == NULL)
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break;
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if (++lim > EQN_NEST_MAX) {
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mandoc_msg(MANDOCERR_ROFFLOOP,
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ep->node->line, ep->node->pos, NULL);
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return EQN_TOK_EOF;
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}
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/* Replace a defined name with its string value. */
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if ((diff = def->valsz - ep->toksz) > 0) {
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start = ep->start - ep->data;
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ep->sz += diff;
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ep->data = mandoc_realloc(ep->data, ep->sz + 1);
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ep->start = ep->data + start;
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}
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if (diff)
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memmove(ep->start + def->valsz, ep->start + ep->toksz,
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strlen(ep->start + ep->toksz) + 1);
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memcpy(ep->start, def->val, def->valsz);
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last_len = ep->start - ep->data + def->valsz;
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}
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if (mode != MODE_TOK)
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return quoted ? EQN_TOK_QUOTED : EQN_TOK__MAX;
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if (quoted) {
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ep->start = mandoc_strndup(ep->start, ep->toksz);
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return EQN_TOK_QUOTED;
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}
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for (tok = 0; tok < EQN_TOK__MAX; tok++)
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if (STRNEQ(ep->start, ep->toksz,
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eqn_toks[tok], strlen(eqn_toks[tok])))
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return tok;
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for (i = 0; i < EQNSYM__MAX; i++) {
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if (STRNEQ(ep->start, ep->toksz,
|
|
eqnsyms[i].str, strlen(eqnsyms[i].str))) {
|
|
mandoc_asprintf(&ep->start,
|
|
"\\[%s]", eqnsyms[i].sym);
|
|
return EQN_TOK_SYM;
|
|
}
|
|
}
|
|
ep->start = mandoc_strndup(ep->start, ep->toksz);
|
|
for (i = 0; i < (int)(sizeof(eqn_func)/sizeof(*eqn_func)); i++)
|
|
if (STRNEQ(ep->start, ep->toksz,
|
|
eqn_func[i], strlen(eqn_func[i])))
|
|
return EQN_TOK_FUNC;
|
|
return EQN_TOK__MAX;
|
|
}
|
|
|
|
void
|
|
eqn_box_free(struct eqn_box *bp)
|
|
{
|
|
if (bp == NULL)
|
|
return;
|
|
|
|
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->top);
|
|
free(bp->bottom);
|
|
free(bp);
|
|
}
|
|
|
|
struct eqn_box *
|
|
eqn_box_new(void)
|
|
{
|
|
struct eqn_box *bp;
|
|
|
|
bp = mandoc_calloc(1, sizeof(*bp));
|
|
bp->expectargs = UINT_MAX;
|
|
return bp;
|
|
}
|
|
|
|
/*
|
|
* Allocate a box as the last child of the parent node.
|
|
*/
|
|
static struct eqn_box *
|
|
eqn_box_alloc(struct eqn_node *ep, struct eqn_box *parent)
|
|
{
|
|
struct eqn_box *bp;
|
|
|
|
bp = eqn_box_new();
|
|
bp->parent = parent;
|
|
bp->parent->args++;
|
|
bp->font = bp->parent->font;
|
|
bp->size = ep->gsize;
|
|
|
|
if (NULL != parent->first) {
|
|
parent->last->next = bp;
|
|
bp->prev = parent->last;
|
|
} else
|
|
parent->first = bp;
|
|
|
|
parent->last = bp;
|
|
return bp;
|
|
}
|
|
|
|
/*
|
|
* Reparent the current last node (of the current parent) under a new
|
|
* EQN_SUBEXPR as the first element.
|
|
* Then return the new parent.
|
|
* The new EQN_SUBEXPR will have a two-child limit.
|
|
*/
|
|
static struct eqn_box *
|
|
eqn_box_makebinary(struct eqn_node *ep, struct eqn_box *parent)
|
|
{
|
|
struct eqn_box *b, *newb;
|
|
|
|
assert(NULL != parent->last);
|
|
b = parent->last;
|
|
if (parent->last == parent->first)
|
|
parent->first = NULL;
|
|
parent->args--;
|
|
parent->last = b->prev;
|
|
b->prev = NULL;
|
|
newb = eqn_box_alloc(ep, parent);
|
|
newb->type = EQN_SUBEXPR;
|
|
newb->expectargs = 2;
|
|
newb->args = 1;
|
|
newb->first = newb->last = b;
|
|
newb->first->next = NULL;
|
|
b->parent = newb;
|
|
return newb;
|
|
}
|
|
|
|
/*
|
|
* Parse the "delim" control statement.
|
|
*/
|
|
static void
|
|
eqn_delim(struct eqn_node *ep)
|
|
{
|
|
if (ep->end[0] == '\0' || ep->end[1] == '\0') {
|
|
mandoc_msg(MANDOCERR_REQ_EMPTY,
|
|
ep->node->line, ep->node->pos, "delim");
|
|
if (ep->end[0] != '\0')
|
|
ep->end++;
|
|
} else if (strncmp(ep->end, "off", 3) == 0) {
|
|
ep->delim = 0;
|
|
ep->end += 3;
|
|
} else if (strncmp(ep->end, "on", 2) == 0) {
|
|
if (ep->odelim && ep->cdelim)
|
|
ep->delim = 1;
|
|
ep->end += 2;
|
|
} else {
|
|
ep->odelim = *ep->end++;
|
|
ep->cdelim = *ep->end++;
|
|
ep->delim = 1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Undefine a previously-defined string.
|
|
*/
|
|
static void
|
|
eqn_undef(struct eqn_node *ep)
|
|
{
|
|
struct eqn_def *def;
|
|
|
|
if (eqn_next(ep, MODE_NOSUB) == EQN_TOK_EOF) {
|
|
mandoc_msg(MANDOCERR_REQ_EMPTY,
|
|
ep->node->line, ep->node->pos, "undef");
|
|
return;
|
|
}
|
|
if ((def = eqn_def_find(ep)) == NULL)
|
|
return;
|
|
free(def->key);
|
|
free(def->val);
|
|
def->key = def->val = NULL;
|
|
def->keysz = def->valsz = 0;
|
|
}
|
|
|
|
static void
|
|
eqn_def(struct eqn_node *ep)
|
|
{
|
|
struct eqn_def *def;
|
|
int i;
|
|
|
|
if (eqn_next(ep, MODE_NOSUB) == EQN_TOK_EOF) {
|
|
mandoc_msg(MANDOCERR_REQ_EMPTY,
|
|
ep->node->line, ep->node->pos, "define");
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Search for a key that already exists.
|
|
* Create a new key if none is found.
|
|
*/
|
|
if ((def = eqn_def_find(ep)) == NULL) {
|
|
/* 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_reallocarray(ep->defs,
|
|
ep->defsz, sizeof(struct eqn_def));
|
|
ep->defs[i].key = ep->defs[i].val = NULL;
|
|
}
|
|
|
|
def = ep->defs + i;
|
|
free(def->key);
|
|
def->key = mandoc_strndup(ep->start, ep->toksz);
|
|
def->keysz = ep->toksz;
|
|
}
|
|
|
|
if (eqn_next(ep, MODE_QUOTED) == EQN_TOK_EOF) {
|
|
mandoc_msg(MANDOCERR_REQ_EMPTY,
|
|
ep->node->line, ep->node->pos, "define %s", def->key);
|
|
free(def->key);
|
|
free(def->val);
|
|
def->key = def->val = NULL;
|
|
def->keysz = def->valsz = 0;
|
|
return;
|
|
}
|
|
free(def->val);
|
|
def->val = mandoc_strndup(ep->start, ep->toksz);
|
|
def->valsz = ep->toksz;
|
|
}
|
|
|
|
void
|
|
eqn_parse(struct eqn_node *ep)
|
|
{
|
|
struct eqn_box *cur, *nbox, *parent, *split;
|
|
const char *cp, *cpn;
|
|
char *p;
|
|
enum eqn_tok tok;
|
|
enum { CCL_LET, CCL_DIG, CCL_PUN } ccl, ccln;
|
|
int size;
|
|
|
|
parent = ep->node->eqn;
|
|
assert(parent != NULL);
|
|
|
|
/*
|
|
* Empty equation.
|
|
* Do not add it to the high-level syntax tree.
|
|
*/
|
|
|
|
if (ep->data == NULL)
|
|
return;
|
|
|
|
ep->start = ep->end = ep->data + strspn(ep->data, " ^~");
|
|
|
|
next_tok:
|
|
tok = eqn_next(ep, MODE_TOK);
|
|
switch (tok) {
|
|
case EQN_TOK_UNDEF:
|
|
eqn_undef(ep);
|
|
break;
|
|
case EQN_TOK_NDEFINE:
|
|
case EQN_TOK_DEFINE:
|
|
eqn_def(ep);
|
|
break;
|
|
case EQN_TOK_TDEFINE:
|
|
if (eqn_next(ep, MODE_NOSUB) == EQN_TOK_EOF ||
|
|
eqn_next(ep, MODE_QUOTED) == EQN_TOK_EOF)
|
|
mandoc_msg(MANDOCERR_REQ_EMPTY,
|
|
ep->node->line, ep->node->pos, "tdefine");
|
|
break;
|
|
case EQN_TOK_DELIM:
|
|
eqn_delim(ep);
|
|
break;
|
|
case EQN_TOK_GFONT:
|
|
if (eqn_next(ep, MODE_SUB) == EQN_TOK_EOF)
|
|
mandoc_msg(MANDOCERR_REQ_EMPTY, ep->node->line,
|
|
ep->node->pos, "%s", eqn_toks[tok]);
|
|
break;
|
|
case EQN_TOK_MARK:
|
|
case EQN_TOK_LINEUP:
|
|
/* Ignore these. */
|
|
break;
|
|
case EQN_TOK_DYAD:
|
|
case EQN_TOK_VEC:
|
|
case EQN_TOK_UNDER:
|
|
case EQN_TOK_BAR:
|
|
case EQN_TOK_TILDE:
|
|
case EQN_TOK_HAT:
|
|
case EQN_TOK_DOT:
|
|
case EQN_TOK_DOTDOT:
|
|
if (parent->last == NULL) {
|
|
mandoc_msg(MANDOCERR_EQN_NOBOX, ep->node->line,
|
|
ep->node->pos, "%s", eqn_toks[tok]);
|
|
cur = eqn_box_alloc(ep, parent);
|
|
cur->type = EQN_TEXT;
|
|
cur->text = mandoc_strdup("");
|
|
}
|
|
parent = eqn_box_makebinary(ep, parent);
|
|
parent->type = EQN_LIST;
|
|
parent->expectargs = 1;
|
|
parent->font = EQNFONT_ROMAN;
|
|
switch (tok) {
|
|
case EQN_TOK_DOTDOT:
|
|
parent->top = mandoc_strdup("\\[ad]");
|
|
break;
|
|
case EQN_TOK_VEC:
|
|
parent->top = mandoc_strdup("\\[->]");
|
|
break;
|
|
case EQN_TOK_DYAD:
|
|
parent->top = mandoc_strdup("\\[<>]");
|
|
break;
|
|
case EQN_TOK_TILDE:
|
|
parent->top = mandoc_strdup("\\[a~]");
|
|
break;
|
|
case EQN_TOK_UNDER:
|
|
parent->bottom = mandoc_strdup("\\[ul]");
|
|
break;
|
|
case EQN_TOK_BAR:
|
|
parent->top = mandoc_strdup("\\[rn]");
|
|
break;
|
|
case EQN_TOK_DOT:
|
|
parent->top = mandoc_strdup("\\[a.]");
|
|
break;
|
|
case EQN_TOK_HAT:
|
|
parent->top = mandoc_strdup("\\[ha]");
|
|
break;
|
|
default:
|
|
abort();
|
|
}
|
|
parent = parent->parent;
|
|
break;
|
|
case EQN_TOK_FWD:
|
|
case EQN_TOK_BACK:
|
|
case EQN_TOK_DOWN:
|
|
case EQN_TOK_UP:
|
|
if (eqn_next(ep, MODE_SUB) == EQN_TOK_EOF)
|
|
mandoc_msg(MANDOCERR_REQ_EMPTY, ep->node->line,
|
|
ep->node->pos, "%s", eqn_toks[tok]);
|
|
break;
|
|
case EQN_TOK_FAT:
|
|
case EQN_TOK_ROMAN:
|
|
case EQN_TOK_ITALIC:
|
|
case EQN_TOK_BOLD:
|
|
while (parent->args == parent->expectargs)
|
|
parent = parent->parent;
|
|
/*
|
|
* These values apply to the next word or sequence of
|
|
* words; thus, we mark that we'll have a child with
|
|
* exactly one of those.
|
|
*/
|
|
parent = eqn_box_alloc(ep, parent);
|
|
parent->type = EQN_LIST;
|
|
parent->expectargs = 1;
|
|
switch (tok) {
|
|
case EQN_TOK_FAT:
|
|
parent->font = EQNFONT_FAT;
|
|
break;
|
|
case EQN_TOK_ROMAN:
|
|
parent->font = EQNFONT_ROMAN;
|
|
break;
|
|
case EQN_TOK_ITALIC:
|
|
parent->font = EQNFONT_ITALIC;
|
|
break;
|
|
case EQN_TOK_BOLD:
|
|
parent->font = EQNFONT_BOLD;
|
|
break;
|
|
default:
|
|
abort();
|
|
}
|
|
break;
|
|
case EQN_TOK_SIZE:
|
|
case EQN_TOK_GSIZE:
|
|
/* Accept two values: integral size and a single. */
|
|
if (eqn_next(ep, MODE_SUB) == EQN_TOK_EOF) {
|
|
mandoc_msg(MANDOCERR_REQ_EMPTY, ep->node->line,
|
|
ep->node->pos, "%s", eqn_toks[tok]);
|
|
break;
|
|
}
|
|
size = mandoc_strntoi(ep->start, ep->toksz, 10);
|
|
if (-1 == size) {
|
|
mandoc_msg(MANDOCERR_IT_NONUM, ep->node->line,
|
|
ep->node->pos, "%s", eqn_toks[tok]);
|
|
break;
|
|
}
|
|
if (EQN_TOK_GSIZE == tok) {
|
|
ep->gsize = size;
|
|
break;
|
|
}
|
|
while (parent->args == parent->expectargs)
|
|
parent = parent->parent;
|
|
parent = eqn_box_alloc(ep, parent);
|
|
parent->type = EQN_LIST;
|
|
parent->expectargs = 1;
|
|
parent->size = size;
|
|
break;
|
|
case EQN_TOK_FROM:
|
|
case EQN_TOK_TO:
|
|
case EQN_TOK_SUB:
|
|
case EQN_TOK_SUP:
|
|
/*
|
|
* We have a left-right-associative expression.
|
|
* Repivot under a positional node, open a child scope
|
|
* and keep on reading.
|
|
*/
|
|
if (parent->last == NULL) {
|
|
mandoc_msg(MANDOCERR_EQN_NOBOX, ep->node->line,
|
|
ep->node->pos, "%s", eqn_toks[tok]);
|
|
cur = eqn_box_alloc(ep, parent);
|
|
cur->type = EQN_TEXT;
|
|
cur->text = mandoc_strdup("");
|
|
}
|
|
while (parent->expectargs == 1 && parent->args == 1)
|
|
parent = parent->parent;
|
|
if (tok == EQN_TOK_FROM || tok == EQN_TOK_TO) {
|
|
for (cur = parent; cur != NULL; cur = cur->parent)
|
|
if (cur->pos == EQNPOS_SUB ||
|
|
cur->pos == EQNPOS_SUP ||
|
|
cur->pos == EQNPOS_SUBSUP ||
|
|
cur->pos == EQNPOS_SQRT ||
|
|
cur->pos == EQNPOS_OVER)
|
|
break;
|
|
if (cur != NULL)
|
|
parent = cur->parent;
|
|
}
|
|
if (tok == EQN_TOK_SUP && parent->pos == EQNPOS_SUB) {
|
|
parent->expectargs = 3;
|
|
parent->pos = EQNPOS_SUBSUP;
|
|
break;
|
|
}
|
|
if (tok == EQN_TOK_TO && parent->pos == EQNPOS_FROM) {
|
|
parent->expectargs = 3;
|
|
parent->pos = EQNPOS_FROMTO;
|
|
break;
|
|
}
|
|
parent = eqn_box_makebinary(ep, parent);
|
|
switch (tok) {
|
|
case EQN_TOK_FROM:
|
|
parent->pos = EQNPOS_FROM;
|
|
break;
|
|
case EQN_TOK_TO:
|
|
parent->pos = EQNPOS_TO;
|
|
break;
|
|
case EQN_TOK_SUP:
|
|
parent->pos = EQNPOS_SUP;
|
|
break;
|
|
case EQN_TOK_SUB:
|
|
parent->pos = EQNPOS_SUB;
|
|
break;
|
|
default:
|
|
abort();
|
|
}
|
|
break;
|
|
case EQN_TOK_SQRT:
|
|
while (parent->args == parent->expectargs)
|
|
parent = parent->parent;
|
|
/*
|
|
* Accept a left-right-associative set of arguments just
|
|
* like sub and sup and friends but without rebalancing
|
|
* under a pivot.
|
|
*/
|
|
parent = eqn_box_alloc(ep, parent);
|
|
parent->type = EQN_SUBEXPR;
|
|
parent->pos = EQNPOS_SQRT;
|
|
parent->expectargs = 1;
|
|
break;
|
|
case EQN_TOK_OVER:
|
|
/*
|
|
* We have a right-left-associative fraction.
|
|
* Close out anything that's currently open, then
|
|
* rebalance and continue reading.
|
|
*/
|
|
if (parent->last == NULL) {
|
|
mandoc_msg(MANDOCERR_EQN_NOBOX, ep->node->line,
|
|
ep->node->pos, "%s", eqn_toks[tok]);
|
|
cur = eqn_box_alloc(ep, parent);
|
|
cur->type = EQN_TEXT;
|
|
cur->text = mandoc_strdup("");
|
|
}
|
|
while (parent->args == parent->expectargs)
|
|
parent = parent->parent;
|
|
while (EQN_SUBEXPR == parent->type)
|
|
parent = parent->parent;
|
|
parent = eqn_box_makebinary(ep, parent);
|
|
parent->pos = EQNPOS_OVER;
|
|
break;
|
|
case EQN_TOK_RIGHT:
|
|
case EQN_TOK_BRACE_CLOSE:
|
|
/*
|
|
* Close out the existing brace.
|
|
* FIXME: this is a shitty sentinel: we should really
|
|
* have a native EQN_BRACE type or whatnot.
|
|
*/
|
|
for (cur = parent; cur != NULL; cur = cur->parent)
|
|
if (cur->type == EQN_LIST &&
|
|
cur->expectargs > 1 &&
|
|
(tok == EQN_TOK_BRACE_CLOSE ||
|
|
cur->left != NULL))
|
|
break;
|
|
if (cur == NULL) {
|
|
mandoc_msg(MANDOCERR_BLK_NOTOPEN, ep->node->line,
|
|
ep->node->pos, "%s", eqn_toks[tok]);
|
|
break;
|
|
}
|
|
parent = cur;
|
|
if (EQN_TOK_RIGHT == tok) {
|
|
if (eqn_next(ep, MODE_SUB) == EQN_TOK_EOF) {
|
|
mandoc_msg(MANDOCERR_REQ_EMPTY,
|
|
ep->node->line, ep->node->pos,
|
|
"%s", eqn_toks[tok]);
|
|
break;
|
|
}
|
|
/* Handling depends on right/left. */
|
|
if (STRNEQ(ep->start, ep->toksz, "ceiling", 7))
|
|
parent->right = mandoc_strdup("\\[rc]");
|
|
else if (STRNEQ(ep->start, ep->toksz, "floor", 5))
|
|
parent->right = mandoc_strdup("\\[rf]");
|
|
else
|
|
parent->right =
|
|
mandoc_strndup(ep->start, ep->toksz);
|
|
}
|
|
parent = parent->parent;
|
|
if (tok == EQN_TOK_BRACE_CLOSE &&
|
|
(parent->type == EQN_PILE ||
|
|
parent->type == EQN_MATRIX))
|
|
parent = parent->parent;
|
|
/* Close out any "singleton" lists. */
|
|
while (parent->type == EQN_LIST &&
|
|
parent->expectargs == 1 &&
|
|
parent->args == 1)
|
|
parent = parent->parent;
|
|
break;
|
|
case EQN_TOK_BRACE_OPEN:
|
|
case EQN_TOK_LEFT:
|
|
/*
|
|
* If we already have something in the stack and we're
|
|
* in an expression, then rewind til we're not any more
|
|
* (just like with the text node).
|
|
*/
|
|
while (parent->args == parent->expectargs)
|
|
parent = parent->parent;
|
|
if (EQN_TOK_LEFT == tok &&
|
|
eqn_next(ep, MODE_SUB) == EQN_TOK_EOF) {
|
|
mandoc_msg(MANDOCERR_REQ_EMPTY, ep->node->line,
|
|
ep->node->pos, "%s", eqn_toks[tok]);
|
|
break;
|
|
}
|
|
parent = eqn_box_alloc(ep, parent);
|
|
parent->type = EQN_LIST;
|
|
if (EQN_TOK_LEFT == tok) {
|
|
if (STRNEQ(ep->start, ep->toksz, "ceiling", 7))
|
|
parent->left = mandoc_strdup("\\[lc]");
|
|
else if (STRNEQ(ep->start, ep->toksz, "floor", 5))
|
|
parent->left = mandoc_strdup("\\[lf]");
|
|
else
|
|
parent->left =
|
|
mandoc_strndup(ep->start, ep->toksz);
|
|
}
|
|
break;
|
|
case EQN_TOK_PILE:
|
|
case EQN_TOK_LPILE:
|
|
case EQN_TOK_RPILE:
|
|
case EQN_TOK_CPILE:
|
|
case EQN_TOK_CCOL:
|
|
case EQN_TOK_LCOL:
|
|
case EQN_TOK_RCOL:
|
|
while (parent->args == parent->expectargs)
|
|
parent = parent->parent;
|
|
parent = eqn_box_alloc(ep, parent);
|
|
parent->type = EQN_PILE;
|
|
parent->expectargs = 1;
|
|
break;
|
|
case EQN_TOK_ABOVE:
|
|
for (cur = parent; cur != NULL; cur = cur->parent)
|
|
if (cur->type == EQN_PILE)
|
|
break;
|
|
if (cur == NULL) {
|
|
mandoc_msg(MANDOCERR_IT_STRAY, ep->node->line,
|
|
ep->node->pos, "%s", eqn_toks[tok]);
|
|
break;
|
|
}
|
|
parent = eqn_box_alloc(ep, cur);
|
|
parent->type = EQN_LIST;
|
|
break;
|
|
case EQN_TOK_MATRIX:
|
|
while (parent->args == parent->expectargs)
|
|
parent = parent->parent;
|
|
parent = eqn_box_alloc(ep, parent);
|
|
parent->type = EQN_MATRIX;
|
|
parent->expectargs = 1;
|
|
break;
|
|
case EQN_TOK_EOF:
|
|
return;
|
|
case EQN_TOK__MAX:
|
|
case EQN_TOK_FUNC:
|
|
case EQN_TOK_QUOTED:
|
|
case EQN_TOK_SYM:
|
|
p = ep->start;
|
|
assert(p != NULL);
|
|
/*
|
|
* If we already have something in the stack and we're
|
|
* in an expression, then rewind til we're not any more.
|
|
*/
|
|
while (parent->args == parent->expectargs)
|
|
parent = parent->parent;
|
|
cur = eqn_box_alloc(ep, parent);
|
|
cur->type = EQN_TEXT;
|
|
cur->text = p;
|
|
switch (tok) {
|
|
case EQN_TOK_FUNC:
|
|
cur->font = EQNFONT_ROMAN;
|
|
break;
|
|
case EQN_TOK_QUOTED:
|
|
if (cur->font == EQNFONT_NONE)
|
|
cur->font = EQNFONT_ITALIC;
|
|
break;
|
|
case EQN_TOK_SYM:
|
|
break;
|
|
default:
|
|
if (cur->font != EQNFONT_NONE || *p == '\0')
|
|
break;
|
|
cpn = p - 1;
|
|
ccln = CCL_LET;
|
|
split = NULL;
|
|
for (;;) {
|
|
/* Advance to next character. */
|
|
cp = cpn++;
|
|
ccl = ccln;
|
|
ccln = isalpha((unsigned char)*cpn) ? CCL_LET :
|
|
isdigit((unsigned char)*cpn) ||
|
|
(*cpn == '.' && (ccl == CCL_DIG ||
|
|
isdigit((unsigned char)cpn[1]))) ?
|
|
CCL_DIG : CCL_PUN;
|
|
/* No boundary before first character. */
|
|
if (cp < p)
|
|
continue;
|
|
cur->font = ccl == CCL_LET ?
|
|
EQNFONT_ITALIC : EQNFONT_ROMAN;
|
|
if (*cp == '\\')
|
|
mandoc_escape(&cpn, NULL, NULL);
|
|
/* No boundary after last character. */
|
|
if (*cpn == '\0')
|
|
break;
|
|
if (ccln == ccl && *cp != ',' && *cpn != ',')
|
|
continue;
|
|
/* Boundary found, split the text. */
|
|
if (parent->args == parent->expectargs) {
|
|
/* Remove the text from the tree. */
|
|
if (cur->prev == NULL)
|
|
parent->first = cur->next;
|
|
else
|
|
cur->prev->next = NULL;
|
|
parent->last = cur->prev;
|
|
parent->args--;
|
|
/* Set up a list instead. */
|
|
split = eqn_box_alloc(ep, parent);
|
|
split->type = EQN_LIST;
|
|
/* Insert the word into the list. */
|
|
split->first = split->last = cur;
|
|
cur->parent = split;
|
|
cur->prev = NULL;
|
|
parent = split;
|
|
}
|
|
/* Append a new text box. */
|
|
nbox = eqn_box_alloc(ep, parent);
|
|
nbox->type = EQN_TEXT;
|
|
nbox->text = mandoc_strdup(cpn);
|
|
/* Truncate the old box. */
|
|
p = mandoc_strndup(cur->text,
|
|
cpn - cur->text);
|
|
free(cur->text);
|
|
cur->text = p;
|
|
/* Setup to process the new box. */
|
|
cur = nbox;
|
|
p = nbox->text;
|
|
cpn = p - 1;
|
|
ccln = CCL_LET;
|
|
}
|
|
if (split != NULL)
|
|
parent = split->parent;
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
abort();
|
|
}
|
|
goto next_tok;
|
|
}
|
|
|
|
void
|
|
eqn_free(struct eqn_node *p)
|
|
{
|
|
int i;
|
|
|
|
if (p == NULL)
|
|
return;
|
|
|
|
for (i = 0; i < (int)p->defsz; i++) {
|
|
free(p->defs[i].key);
|
|
free(p->defs[i].val);
|
|
}
|
|
|
|
free(p->data);
|
|
free(p->defs);
|
|
free(p);
|
|
}
|