version 1.3, 2011/03/15 16:23:51 |
version 1.70, 2017/06/26 11:04:47 |
|
|
/* $Id$ */ |
/* $Id$ */ |
/* |
/* |
* Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv> |
* Copyright (c) 2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv> |
|
* Copyright (c) 2014, 2015, 2017 Ingo Schwarze <schwarze@openbsd.org> |
* |
* |
* Permission to use, copy, modify, and distribute this software for any |
* Permission to use, copy, modify, and distribute this software for any |
* purpose with or without fee is hereby granted, provided that the above |
* purpose with or without fee is hereby granted, provided that the above |
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
*/ |
*/ |
#ifdef HAVE_CONFIG_H |
|
#include "config.h" |
#include "config.h" |
#endif |
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|
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#include <sys/types.h> |
|
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#include <assert.h> |
#include <assert.h> |
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#include <ctype.h> |
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#include <limits.h> |
#include <stdio.h> |
#include <stdio.h> |
#include <stdlib.h> |
#include <stdlib.h> |
#include <string.h> |
#include <string.h> |
#include <time.h> |
#include <time.h> |
|
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#include "mandoc.h" |
#include "mandoc.h" |
#include "roff.h" |
#include "mandoc_aux.h" |
#include "libmandoc.h" |
#include "libmandoc.h" |
#include "libroff.h" |
#include "libroff.h" |
|
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/* ARGSUSED */ |
#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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|
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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] = { |
|
"dyad", /* EQN_TOK_DYAD */ |
|
"vec", /* EQN_TOK_VEC */ |
|
"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 */ |
|
"over", /* EQN_TOK_OVER */ |
|
"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 */ |
|
"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 */ |
|
"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 */ |
|
"ccol", /* EQN_TOK_CCOL */ |
|
"lcol", /* EQN_TOK_LCOL */ |
|
"rcol", /* EQN_TOK_RCOL */ |
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"delim", /* EQN_TOK_DELIM */ |
|
"define", /* EQN_TOK_DEFINE */ |
|
"tdefine", /* EQN_TOK_TDEFINE */ |
|
"ndefine", /* EQN_TOK_NDEFINE */ |
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"undef", /* EQN_TOK_UNDEF */ |
|
"above", /* EQN_TOK_ABOVE */ |
|
}; |
|
|
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static const char *const eqn_func[] = { |
|
"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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enum eqn_symt { |
|
EQNSYM_alpha, |
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EQNSYM_beta, |
|
EQNSYM_chi, |
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EQNSYM_delta, |
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EQNSYM_epsilon, |
|
EQNSYM_eta, |
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EQNSYM_gamma, |
|
EQNSYM_iota, |
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EQNSYM_kappa, |
|
EQNSYM_lambda, |
|
EQNSYM_mu, |
|
EQNSYM_nu, |
|
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, |
|
EQNSYM_tau, |
|
EQNSYM_theta, |
|
EQNSYM_upsilon, |
|
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, |
|
EQNSYM_SIGMA, |
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EQNSYM_THETA, |
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EQNSYM_UPSILON, |
|
EQNSYM_XI, |
|
EQNSYM_inter, |
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EQNSYM_union, |
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EQNSYM_prod, |
|
EQNSYM_int, |
|
EQNSYM_sum, |
|
EQNSYM_grad, |
|
EQNSYM_del, |
|
EQNSYM_times, |
|
EQNSYM_cdot, |
|
EQNSYM_nothing, |
|
EQNSYM_approx, |
|
EQNSYM_prime, |
|
EQNSYM_half, |
|
EQNSYM_partial, |
|
EQNSYM_inf, |
|
EQNSYM_muchgreat, |
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EQNSYM_muchless, |
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EQNSYM_larrow, |
|
EQNSYM_rarrow, |
|
EQNSYM_pm, |
|
EQNSYM_nequal, |
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EQNSYM_equiv, |
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EQNSYM_lessequal, |
|
EQNSYM_moreequal, |
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EQNSYM_minus, |
|
EQNSYM__MAX |
|
}; |
|
|
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struct eqnsym { |
|
const char *str; |
|
const char *sym; |
|
}; |
|
|
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static const struct eqnsym eqnsyms[EQNSYM__MAX] = { |
|
{ "alpha", "*a" }, /* EQNSYM_alpha */ |
|
{ "beta", "*b" }, /* EQNSYM_beta */ |
|
{ "chi", "*x" }, /* EQNSYM_chi */ |
|
{ "delta", "*d" }, /* EQNSYM_delta */ |
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{ "epsilon", "*e" }, /* EQNSYM_epsilon */ |
|
{ "eta", "*y" }, /* EQNSYM_eta */ |
|
{ "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 */ |
|
{ "omega", "*w" }, /* EQNSYM_omega */ |
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{ "omicron", "*o" }, /* EQNSYM_omicron */ |
|
{ "phi", "*f" }, /* EQNSYM_phi */ |
|
{ "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 */ |
|
{ "tau", "*t" }, /* EQNSYM_tau */ |
|
{ "theta", "*h" }, /* EQNSYM_theta */ |
|
{ "upsilon", "*u" }, /* EQNSYM_upsilon */ |
|
{ "xi", "*c" }, /* EQNSYM_xi */ |
|
{ "zeta", "*z" }, /* EQNSYM_zeta */ |
|
{ "DELTA", "*D" }, /* EQNSYM_DELTA */ |
|
{ "GAMMA", "*G" }, /* EQNSYM_GAMMA */ |
|
{ "LAMBDA", "*L" }, /* EQNSYM_LAMBDA */ |
|
{ "OMEGA", "*W" }, /* EQNSYM_OMEGA */ |
|
{ "PHI", "*F" }, /* EQNSYM_PHI */ |
|
{ "PI", "*P" }, /* EQNSYM_PI */ |
|
{ "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 */ |
|
{ "XI", "*C" }, /* EQNSYM_XI */ |
|
{ "inter", "ca" }, /* EQNSYM_inter */ |
|
{ "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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|
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static struct eqn_box *eqn_box_alloc(struct eqn_node *, struct eqn_box *); |
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static void eqn_box_free(struct eqn_box *); |
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static struct eqn_box *eqn_box_makebinary(struct eqn_node *, |
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enum eqn_post, 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 *, const char *, size_t); |
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static void eqn_delim(struct eqn_node *); |
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static const char *eqn_next(struct eqn_node *, char, size_t *, int); |
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static const char *eqn_nextrawtok(struct eqn_node *, size_t *); |
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static const char *eqn_nexttok(struct eqn_node *, size_t *); |
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static enum rofferr eqn_parse(struct eqn_node *, struct eqn_box *); |
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static enum eqn_tok eqn_tok_parse(struct eqn_node *, char **); |
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static void eqn_undef(struct eqn_node *); |
|
|
|
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enum rofferr |
enum rofferr |
eqn_read(struct eqn_node **epp, int ln, const char *p, int offs) |
eqn_read(struct eqn_node **epp, int ln, |
|
const char *p, int pos, int *offs) |
{ |
{ |
size_t sz; |
size_t sz; |
struct eqn_node *ep; |
struct eqn_node *ep; |
|
enum rofferr er; |
|
|
if (0 == strcmp(p, ".EN")) { |
ep = *epp; |
*epp = NULL; |
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return(ROFF_EQN); |
/* |
|
* If we're the terminating mark, unset our equation status and |
|
* validate the full equation. |
|
*/ |
|
|
|
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) |
|
p++; |
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if ('\0' == *p) |
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return er; |
|
mandoc_vmsg(MANDOCERR_ARG_SKIP, ep->parse, |
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ln, pos, "EN %s", p); |
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return er; |
} |
} |
|
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ep = *epp; |
/* |
|
* Build up the full string, replacing all newlines with regular |
|
* whitespace. |
|
*/ |
|
|
sz = strlen(&p[offs]); |
sz = strlen(p + pos) + 1; |
ep->eqn.data = mandoc_realloc(ep->eqn.data, ep->eqn.sz + sz + 1); |
ep->data = mandoc_realloc(ep->data, ep->sz + sz + 1); |
if (0 == ep->eqn.sz) |
|
*ep->eqn.data = '\0'; |
|
|
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ep->eqn.sz += sz; |
/* First invocation: nil terminate the string. */ |
strlcat(ep->eqn.data, &p[offs], ep->eqn.sz + 1); |
|
return(ROFF_IGN); |
if (0 == ep->sz) |
|
*ep->data = '\0'; |
|
|
|
ep->sz += sz; |
|
strlcat(ep->data, p + pos, ep->sz + 1); |
|
strlcat(ep->data, " ", ep->sz + 1); |
|
return ROFF_IGN; |
} |
} |
|
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struct eqn_node * |
struct eqn_node * |
eqn_alloc(int pos, int line) |
eqn_alloc(int pos, int line, struct mparse *parse) |
{ |
{ |
struct eqn_node *p; |
struct eqn_node *p; |
|
|
p = mandoc_calloc(1, sizeof(struct eqn_node)); |
p = mandoc_calloc(1, sizeof(struct eqn_node)); |
p->eqn.line = line; |
|
|
p->parse = parse; |
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p->eqn.ln = line; |
p->eqn.pos = pos; |
p->eqn.pos = pos; |
|
p->gsize = EQN_DEFSIZE; |
|
|
return(p); |
return p; |
} |
} |
|
|
/* ARGSUSED */ |
/* |
void |
* Find the key "key" of the give size within our eqn-defined values. |
eqn_end(struct eqn_node *e) |
*/ |
|
static struct eqn_def * |
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eqn_def_find(struct eqn_node *ep, const char *key, size_t sz) |
{ |
{ |
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int i; |
|
|
/* Nothing to do. */ |
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; |
} |
} |
|
|
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/* |
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* Get the next token from the input stream using the given quote |
|
* character. |
|
* Optionally make any replacements. |
|
*/ |
|
static const char * |
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eqn_next(struct eqn_node *ep, char quote, size_t *sz, int repl) |
|
{ |
|
static size_t last_len; |
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static int lim; |
|
|
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char *start, *next; |
|
int q, diff; |
|
size_t ssz, dummy; |
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struct eqn_def *def; |
|
|
|
if (NULL == sz) |
|
sz = &dummy; |
|
|
|
if (ep->cur >= last_len) |
|
lim = 0; |
|
ep->rew = ep->cur; |
|
again: |
|
/* Prevent self-definitions. */ |
|
|
|
if (lim >= EQN_NEST_MAX) { |
|
mandoc_msg(MANDOCERR_ROFFLOOP, ep->parse, |
|
ep->eqn.ln, ep->eqn.pos, NULL); |
|
return NULL; |
|
} |
|
|
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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) |
|
mandoc_msg(MANDOCERR_ARG_QUOTE, ep->parse, |
|
ep->eqn.ln, ep->eqn.pos, NULL); |
|
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); |
|
last_len = start - ep->data + def->valsz; |
|
lim++; |
|
goto again; |
|
} |
|
|
|
return start; |
|
} |
|
|
|
/* |
|
* Get the next delimited token using the default current quote |
|
* character. |
|
*/ |
|
static const char * |
|
eqn_nexttok(struct eqn_node *ep, size_t *sz) |
|
{ |
|
|
|
return eqn_next(ep, '"', sz, 1); |
|
} |
|
|
|
/* |
|
* Get next token without replacement. |
|
*/ |
|
static const char * |
|
eqn_nextrawtok(struct eqn_node *ep, size_t *sz) |
|
{ |
|
|
|
return eqn_next(ep, '"', sz, 0); |
|
} |
|
|
|
/* |
|
* Parse a token from the stream of text. |
|
* A token consists of one of the recognised eqn(7) strings. |
|
* Strings are separated by delimiting marks. |
|
* This returns EQN_TOK_EOF when there are no more tokens. |
|
* If the token is an unrecognised string literal, then it returns |
|
* EQN_TOK__MAX and sets the "p" pointer to an allocated, nil-terminated |
|
* string. |
|
* This must be later freed with free(3). |
|
*/ |
|
static enum eqn_tok |
|
eqn_tok_parse(struct eqn_node *ep, char **p) |
|
{ |
|
const char *start; |
|
size_t i, sz; |
|
int quoted; |
|
|
|
if (p != NULL) |
|
*p = NULL; |
|
|
|
quoted = ep->data[ep->cur] == '"'; |
|
|
|
if ((start = eqn_nexttok(ep, &sz)) == NULL) |
|
return EQN_TOK_EOF; |
|
|
|
if (quoted) { |
|
if (p != NULL) |
|
*p = mandoc_strndup(start, sz); |
|
return EQN_TOK_QUOTED; |
|
} |
|
|
|
for (i = 0; i < EQN_TOK__MAX; i++) |
|
if (STRNEQ(start, sz, eqn_toks[i], strlen(eqn_toks[i]))) |
|
return i; |
|
|
|
for (i = 0; i < EQNSYM__MAX; i++) { |
|
if (STRNEQ(start, sz, |
|
eqnsyms[i].str, strlen(eqnsyms[i].str))) { |
|
mandoc_asprintf(p, "\\[%s]", eqnsyms[i].sym); |
|
return EQN_TOK_SYM; |
|
} |
|
} |
|
|
|
if (p != NULL) |
|
*p = mandoc_strndup(start, sz); |
|
|
|
for (i = 0; i < sizeof(eqn_func)/sizeof(*eqn_func); i++) |
|
if (STRNEQ(start, sz, eqn_func[i], strlen(eqn_func[i]))) |
|
return EQN_TOK_FUNC; |
|
|
|
return EQN_TOK__MAX; |
|
} |
|
|
|
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->top); |
|
free(bp->bottom); |
|
free(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 = mandoc_calloc(1, sizeof(struct eqn_box)); |
|
bp->parent = parent; |
|
bp->parent->args++; |
|
bp->expectargs = UINT_MAX; |
|
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, |
|
enum eqn_post pos, 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->pos = pos; |
|
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) |
|
{ |
|
const char *start; |
|
size_t sz; |
|
|
|
if ((start = eqn_nextrawtok(ep, &sz)) == NULL) |
|
mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse, |
|
ep->eqn.ln, ep->eqn.pos, "delim"); |
|
else if (strncmp(start, "off", 3) == 0) |
|
ep->delim = 0; |
|
else if (strncmp(start, "on", 2) == 0) { |
|
if (ep->odelim && ep->cdelim) |
|
ep->delim = 1; |
|
} else if (start[1] != '\0') { |
|
ep->odelim = start[0]; |
|
ep->cdelim = start[1]; |
|
ep->delim = 1; |
|
} |
|
} |
|
|
|
/* |
|
* Undefine a previously-defined string. |
|
*/ |
|
static void |
|
eqn_undef(struct eqn_node *ep) |
|
{ |
|
const char *start; |
|
struct eqn_def *def; |
|
size_t sz; |
|
|
|
if ((start = eqn_nextrawtok(ep, &sz)) == NULL) { |
|
mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse, |
|
ep->eqn.ln, ep->eqn.pos, "undef"); |
|
return; |
|
} |
|
if ((def = eqn_def_find(ep, start, sz)) == 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) |
|
{ |
|
const char *start; |
|
size_t sz; |
|
struct eqn_def *def; |
|
int i; |
|
|
|
if ((start = eqn_nextrawtok(ep, &sz)) == NULL) { |
|
mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse, |
|
ep->eqn.ln, ep->eqn.pos, "define"); |
|
return; |
|
} |
|
|
|
/* |
|
* 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_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(start, sz); |
|
def->keysz = sz; |
|
} |
|
|
|
start = eqn_next(ep, ep->data[(int)ep->cur], &sz, 0); |
|
if (start == NULL) { |
|
mandoc_vmsg(MANDOCERR_REQ_EMPTY, ep->parse, |
|
ep->eqn.ln, ep->eqn.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(start, sz); |
|
def->valsz = sz; |
|
} |
|
|
|
/* |
|
* Recursively parse an eqn(7) expression. |
|
*/ |
|
static enum rofferr |
|
eqn_parse(struct eqn_node *ep, struct eqn_box *parent) |
|
{ |
|
char sym[64]; |
|
struct eqn_box *cur, *nbox, *split; |
|
const char *cp, *cpn, *start; |
|
char *p; |
|
size_t sz; |
|
enum eqn_tok tok, subtok; |
|
enum eqn_post pos; |
|
enum { CCL_LET, CCL_DIG, CCL_PUN } ccl, ccln; |
|
int size; |
|
|
|
assert(parent != NULL); |
|
|
|
/* |
|
* Empty equation. |
|
* Do not add it to the high-level syntax tree. |
|
*/ |
|
|
|
if (ep->data == NULL) |
|
return ROFF_IGN; |
|
|
|
next_tok: |
|
tok = eqn_tok_parse(ep, &p); |
|
|
|
this_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_nextrawtok(ep, NULL) == NULL || |
|
eqn_next(ep, ep->data[(int)ep->cur], NULL, 0) == NULL) |
|
mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse, |
|
ep->eqn.ln, ep->eqn.pos, "tdefine"); |
|
break; |
|
case EQN_TOK_DELIM: |
|
eqn_delim(ep); |
|
break; |
|
case EQN_TOK_GFONT: |
|
if (eqn_nextrawtok(ep, NULL) == NULL) |
|
mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse, |
|
ep->eqn.ln, ep->eqn.pos, 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->parse, |
|
ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]); |
|
cur = eqn_box_alloc(ep, parent); |
|
cur->type = EQN_TEXT; |
|
cur->text = mandoc_strdup(""); |
|
} |
|
parent = eqn_box_makebinary(ep, EQNPOS_NONE, parent); |
|
parent->type = EQN_LISTONE; |
|
parent->expectargs = 1; |
|
parent->font = EQNFONT_ROMAN; |
|
switch (tok) { |
|
case EQN_TOK_DOTDOT: |
|
strlcpy(sym, "\\[ad]", sizeof(sym)); |
|
break; |
|
case EQN_TOK_VEC: |
|
strlcpy(sym, "\\[->]", sizeof(sym)); |
|
break; |
|
case EQN_TOK_DYAD: |
|
strlcpy(sym, "\\[<>]", sizeof(sym)); |
|
break; |
|
case EQN_TOK_TILDE: |
|
strlcpy(sym, "\\[a~]", sizeof(sym)); |
|
break; |
|
case EQN_TOK_UNDER: |
|
strlcpy(sym, "\\[ul]", sizeof(sym)); |
|
break; |
|
case EQN_TOK_BAR: |
|
strlcpy(sym, "\\[rl]", sizeof(sym)); |
|
break; |
|
case EQN_TOK_DOT: |
|
strlcpy(sym, "\\[a.]", sizeof(sym)); |
|
break; |
|
case EQN_TOK_HAT: |
|
strlcpy(sym, "\\[ha]", sizeof(sym)); |
|
break; |
|
default: |
|
abort(); |
|
} |
|
|
|
switch (tok) { |
|
case EQN_TOK_DOTDOT: |
|
case EQN_TOK_VEC: |
|
case EQN_TOK_DYAD: |
|
case EQN_TOK_TILDE: |
|
case EQN_TOK_BAR: |
|
case EQN_TOK_DOT: |
|
case EQN_TOK_HAT: |
|
parent->top = mandoc_strdup(sym); |
|
break; |
|
case EQN_TOK_UNDER: |
|
parent->bottom = mandoc_strdup(sym); |
|
break; |
|
default: |
|
abort(); |
|
} |
|
parent = parent->parent; |
|
break; |
|
case EQN_TOK_FWD: |
|
case EQN_TOK_BACK: |
|
case EQN_TOK_DOWN: |
|
case EQN_TOK_UP: |
|
subtok = eqn_tok_parse(ep, NULL); |
|
if (subtok != EQN_TOK__MAX) { |
|
mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse, |
|
ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]); |
|
tok = subtok; |
|
goto this_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_LISTONE; |
|
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 (NULL == (start = eqn_nexttok(ep, &sz))) { |
|
mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse, |
|
ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]); |
|
break; |
|
} |
|
size = mandoc_strntoi(start, sz, 10); |
|
if (-1 == size) { |
|
mandoc_msg(MANDOCERR_IT_NONUM, ep->parse, |
|
ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]); |
|
break; |
|
} |
|
if (EQN_TOK_GSIZE == tok) { |
|
ep->gsize = size; |
|
break; |
|
} |
|
parent = eqn_box_alloc(ep, parent); |
|
parent->type = EQN_LISTONE; |
|
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->parse, |
|
ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]); |
|
cur = eqn_box_alloc(ep, parent); |
|
cur->type = EQN_TEXT; |
|
cur->text = mandoc_strdup(""); |
|
} |
|
/* Handle the "subsup" and "fromto" positions. */ |
|
if (EQN_TOK_SUP == tok && parent->pos == EQNPOS_SUB) { |
|
parent->expectargs = 3; |
|
parent->pos = EQNPOS_SUBSUP; |
|
break; |
|
} |
|
if (EQN_TOK_TO == tok && parent->pos == EQNPOS_FROM) { |
|
parent->expectargs = 3; |
|
parent->pos = EQNPOS_FROMTO; |
|
break; |
|
} |
|
switch (tok) { |
|
case EQN_TOK_FROM: |
|
pos = EQNPOS_FROM; |
|
break; |
|
case EQN_TOK_TO: |
|
pos = EQNPOS_TO; |
|
break; |
|
case EQN_TOK_SUP: |
|
pos = EQNPOS_SUP; |
|
break; |
|
case EQN_TOK_SUB: |
|
pos = EQNPOS_SUB; |
|
break; |
|
default: |
|
abort(); |
|
} |
|
parent = eqn_box_makebinary(ep, pos, parent); |
|
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->parse, |
|
ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]); |
|
cur = eqn_box_alloc(ep, parent); |
|
cur->type = EQN_TEXT; |
|
cur->text = mandoc_strdup(""); |
|
} |
|
while (EQN_SUBEXPR == parent->type) |
|
parent = parent->parent; |
|
parent = eqn_box_makebinary(ep, EQNPOS_OVER, parent); |
|
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 && |
|
(tok == EQN_TOK_BRACE_CLOSE || |
|
cur->left != NULL)) |
|
break; |
|
if (cur == NULL) { |
|
mandoc_msg(MANDOCERR_BLK_NOTOPEN, ep->parse, |
|
ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]); |
|
break; |
|
} |
|
parent = cur; |
|
if (EQN_TOK_RIGHT == tok) { |
|
if (NULL == (start = eqn_nexttok(ep, &sz))) { |
|
mandoc_msg(MANDOCERR_REQ_EMPTY, |
|
ep->parse, ep->eqn.ln, |
|
ep->eqn.pos, eqn_toks[tok]); |
|
break; |
|
} |
|
/* Handling depends on right/left. */ |
|
if (STRNEQ(start, sz, "ceiling", 7)) { |
|
strlcpy(sym, "\\[rc]", sizeof(sym)); |
|
parent->right = mandoc_strdup(sym); |
|
} else if (STRNEQ(start, sz, "floor", 5)) { |
|
strlcpy(sym, "\\[rf]", sizeof(sym)); |
|
parent->right = mandoc_strdup(sym); |
|
} else |
|
parent->right = mandoc_strndup(start, sz); |
|
} |
|
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_LISTONE && |
|
parent->args == parent->expectargs) |
|
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 && |
|
(start = eqn_nexttok(ep, &sz)) == NULL) { |
|
mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse, |
|
ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]); |
|
break; |
|
} |
|
parent = eqn_box_alloc(ep, parent); |
|
parent->type = EQN_LIST; |
|
if (EQN_TOK_LEFT == tok) { |
|
if (STRNEQ(start, sz, "ceiling", 7)) { |
|
strlcpy(sym, "\\[lc]", sizeof(sym)); |
|
parent->left = mandoc_strdup(sym); |
|
} else if (STRNEQ(start, sz, "floor", 5)) { |
|
strlcpy(sym, "\\[lf]", sizeof(sym)); |
|
parent->left = mandoc_strdup(sym); |
|
} else |
|
parent->left = mandoc_strndup(start, sz); |
|
} |
|
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->parse, |
|
ep->eqn.ln, ep->eqn.pos, 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: |
|
/* |
|
* End of file! |
|
* TODO: make sure we're not in an open subexpression. |
|
*/ |
|
return ROFF_EQN; |
|
case EQN_TOK__MAX: |
|
case EQN_TOK_FUNC: |
|
case EQN_TOK_QUOTED: |
|
case EQN_TOK_SYM: |
|
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) |
|
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; |
|
} |
|
/* |
|
* Post-process list status. |
|
*/ |
|
while (parent->type == EQN_LISTONE && |
|
parent->args == parent->expectargs) |
|
parent = parent->parent; |
|
break; |
|
default: |
|
abort(); |
|
} |
|
goto next_tok; |
|
} |
|
|
|
enum rofferr |
|
eqn_end(struct eqn_node **epp) |
|
{ |
|
struct eqn_node *ep; |
|
|
|
ep = *epp; |
|
*epp = NULL; |
|
|
|
ep->eqn.root = mandoc_calloc(1, sizeof(struct eqn_box)); |
|
ep->eqn.root->expectargs = UINT_MAX; |
|
return eqn_parse(ep, ep->eqn.root); |
|
} |
|
|
void |
void |
eqn_free(struct eqn_node *p) |
eqn_free(struct eqn_node *p) |
{ |
{ |
|
int i; |
|
|
free(p->eqn.data); |
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->data); |
|
free(p->defs); |
free(p); |
free(p); |
} |
} |