diff options
Diffstat (limited to 'eqn.c')
| -rw-r--r-- | eqn.c | 1351 |
1 files changed, 740 insertions, 611 deletions
@@ -30,14 +30,111 @@ #include "libmandoc.h" #include "libroff.h" +#define EQN_MSG(t, x) \ + mandoc_msg((t), (x)->parse, (x)->eqn.ln, (x)->eqn.pos, NULL) #define EQN_NEST_MAX 128 /* maximum nesting of defines */ -#define EQN_MSG(t, x) mandoc_msg((t), (x)->parse, (x)->eqn.ln, (x)->eqn.pos, NULL) +#define STRNEQ(p1, sz1, p2, sz2) \ + ((sz1) == (sz2) && 0 == strncmp((p1), (p2), (sz1))) +#define EQNSTREQ(x, p, sz) \ + STRNEQ((x)->name, (x)->sz, (p), (sz)) -enum eqn_rest { - EQN_DESCOPE, - EQN_ERR, - EQN_OK, - EQN_EOF +enum eqn_tok { + EQN_TOK_DYAD = 0, + EQN_TOK_VEC, + EQN_TOK_UNDER, + EQN_TOK_BAR, + EQN_TOK_TILDE, + EQN_TOK_HAT, + EQN_TOK_DOT, + EQN_TOK_DOTDOT, + EQN_TOK_FWD, + EQN_TOK_BACK, + EQN_TOK_DOWN, + EQN_TOK_UP, + EQN_TOK_FAT, + EQN_TOK_ROMAN, + EQN_TOK_ITALIC, + EQN_TOK_BOLD, + EQN_TOK_SIZE, + EQN_TOK_SUB, + EQN_TOK_SUP, + EQN_TOK_SQRT, + EQN_TOK_OVER, + EQN_TOK_FROM, + EQN_TOK_TO, + EQN_TOK_BRACE_OPEN, + EQN_TOK_BRACE_CLOSE, + EQN_TOK_GSIZE, + EQN_TOK_GFONT, + EQN_TOK_MARK, + EQN_TOK_LINEUP, + EQN_TOK_LEFT, + EQN_TOK_RIGHT, + EQN_TOK_PILE, + EQN_TOK_LPILE, + EQN_TOK_RPILE, + EQN_TOK_CPILE, + EQN_TOK_MATRIX, + EQN_TOK_CCOL, + EQN_TOK_LCOL, + EQN_TOK_RCOL, + EQN_TOK_DELIM, + EQN_TOK_DEFINE, + EQN_TOK_TDEFINE, + EQN_TOK_NDEFINE, + EQN_TOK_UNDEF, + EQN_TOK_EOF, + EQN_TOK_ABOVE, + EQN_TOK__MAX +}; + +static const char *eqn_toks[EQN_TOK__MAX] = { + "dyad", /* EQN_TOK_DYAD */ + "vec", /* EQN_TOK_VEC */ + "under", /* EQN_TOK_UNDER */ + "bar", /* EQN_TOK_BAR */ + "tilde", /* EQN_TOK_TILDE */ + "hat", /* EQN_TOK_HAT */ + "dot", /* EQN_TOK_DOT */ + "dotdot", /* EQN_TOK_DOTDOT */ + "fwd", /* EQN_TOK_FWD * */ + "back", /* EQN_TOK_BACK */ + "down", /* EQN_TOK_DOWN */ + "up", /* EQN_TOK_UP */ + "fat", /* EQN_TOK_FAT */ + "roman", /* EQN_TOK_ROMAN */ + "italic", /* EQN_TOK_ITALIC */ + "bold", /* EQN_TOK_BOLD */ + "size", /* EQN_TOK_SIZE */ + "sub", /* EQN_TOK_SUB */ + "sup", /* EQN_TOK_SUP */ + "sqrt", /* EQN_TOK_SQRT */ + "over", /* EQN_TOK_OVER */ + "from", /* EQN_TOK_FROM */ + "to", /* EQN_TOK_TO */ + "{", /* EQN_TOK_BRACE_OPEN */ + "}", /* EQN_TOK_BRACE_CLOSE */ + "gsize", /* EQN_TOK_GSIZE */ + "gfont", /* EQN_TOK_GFONT */ + "mark", /* EQN_TOK_MARK */ + "lineup", /* EQN_TOK_LINEUP */ + "left", /* EQN_TOK_LEFT */ + "right", /* EQN_TOK_RIGHT */ + "pile", /* EQN_TOK_PILE */ + "lpile", /* EQN_TOK_LPILE */ + "rpile", /* EQN_TOK_RPILE */ + "cpile", /* EQN_TOK_CPILE */ + "matrix", /* EQN_TOK_MATRIX */ + "ccol", /* EQN_TOK_CCOL */ + "lcol", /* EQN_TOK_LCOL */ + "rcol", /* EQN_TOK_RCOL */ + "delim", /* EQN_TOK_DELIM */ + "define", /* EQN_TOK_DEFINE */ + "tdefine", /* EQN_TOK_TDEFINE */ + "ndefine", /* EQN_TOK_NDEFINE */ + "undef", /* EQN_TOK_UNDEF */ + NULL, /* EQN_TOK_EOF */ + "above", /* EQN_TOK_ABOVE */ }; enum eqn_symt { @@ -103,183 +200,73 @@ enum eqn_symt { EQNSYM__MAX }; -enum eqnpartt { - EQN_DEFINE = 0, - EQN_NDEFINE, - EQN_TDEFINE, - EQN_SET, - EQN_UNDEF, - EQN_GFONT, - EQN_GSIZE, - EQN_BACK, - EQN_FWD, - EQN_UP, - EQN_DOWN, - EQN__MAX -}; - -struct eqnstr { - const char *name; - size_t sz; -}; - -#define STRNEQ(p1, sz1, p2, sz2) \ - ((sz1) == (sz2) && 0 == strncmp((p1), (p2), (sz1))) -#define EQNSTREQ(x, p, sz) \ - STRNEQ((x)->name, (x)->sz, (p), (sz)) - -struct eqnpart { - struct eqnstr str; - int (*fp)(struct eqn_node *); -}; - struct eqnsym { - struct eqnstr str; + const char *str; const char *sym; }; -static enum eqn_rest eqn_box(struct eqn_node *, struct eqn_box *); -static struct eqn_box *eqn_box_alloc(struct eqn_node *, - struct eqn_box *); -static void eqn_box_free(struct eqn_box *); -static struct eqn_def *eqn_def_find(struct eqn_node *, - const char *, size_t); -static int eqn_do_gfont(struct eqn_node *); -static int eqn_do_gsize(struct eqn_node *); -static int eqn_do_define(struct eqn_node *); -static int eqn_do_ign1(struct eqn_node *); -static int eqn_do_ign2(struct eqn_node *); -static int eqn_do_tdefine(struct eqn_node *); -static int eqn_do_undef(struct eqn_node *); -static enum eqn_rest eqn_eqn(struct eqn_node *, struct eqn_box *); -static enum eqn_rest eqn_list(struct eqn_node *, struct eqn_box *); -static enum eqn_rest eqn_matrix(struct eqn_node *, struct eqn_box *); -static const char *eqn_nexttok(struct eqn_node *, size_t *); -static const char *eqn_nextrawtok(struct eqn_node *, size_t *); -static const char *eqn_next(struct eqn_node *, - char, size_t *, int); -static void eqn_rewind(struct eqn_node *); - -static const struct eqnpart eqnparts[EQN__MAX] = { - { { "define", 6 }, eqn_do_define }, /* EQN_DEFINE */ - { { "ndefine", 7 }, eqn_do_define }, /* EQN_NDEFINE */ - { { "tdefine", 7 }, eqn_do_tdefine }, /* EQN_TDEFINE */ - { { "set", 3 }, eqn_do_ign2 }, /* EQN_SET */ - { { "undef", 5 }, eqn_do_undef }, /* EQN_UNDEF */ - { { "gfont", 5 }, eqn_do_gfont }, /* EQN_GFONT */ - { { "gsize", 5 }, eqn_do_gsize }, /* EQN_GSIZE */ - { { "back", 4 }, eqn_do_ign1 }, /* EQN_BACK */ - { { "fwd", 3 }, eqn_do_ign1 }, /* EQN_FWD */ - { { "up", 2 }, eqn_do_ign1 }, /* EQN_UP */ - { { "down", 4 }, eqn_do_ign1 }, /* EQN_DOWN */ -}; - -static const struct eqnstr eqnmarks[EQNMARK__MAX] = { - { "", 0 }, /* EQNMARK_NONE */ - { "dot", 3 }, /* EQNMARK_DOT */ - { "dotdot", 6 }, /* EQNMARK_DOTDOT */ - { "hat", 3 }, /* EQNMARK_HAT */ - { "tilde", 5 }, /* EQNMARK_TILDE */ - { "vec", 3 }, /* EQNMARK_VEC */ - { "dyad", 4 }, /* EQNMARK_DYAD */ - { "bar", 3 }, /* EQNMARK_BAR */ - { "under", 5 }, /* EQNMARK_UNDER */ -}; - -static const struct eqnstr eqnfonts[EQNFONT__MAX] = { - { "", 0 }, /* EQNFONT_NONE */ - { "roman", 5 }, /* EQNFONT_ROMAN */ - { "bold", 4 }, /* EQNFONT_BOLD */ - { "fat", 3 }, /* EQNFONT_FAT */ - { "italic", 6 }, /* EQNFONT_ITALIC */ -}; - -static const struct eqnstr eqnposs[EQNPOS__MAX] = { - { NULL, 0 }, /* EQNPOS_NONE */ - { "over", 4 }, /* EQNPOS_OVER */ - { "sup", 3 }, /* EQNPOS_SUP */ - { NULL, 0 }, /* EQNPOS_SUPSUB */ - { "sub", 3 }, /* EQNPOS_SUB */ - { "to", 2 }, /* EQNPOS_TO */ - { "from", 4 }, /* EQNPOS_FROM */ - { NULL, 0 }, /* EQNPOS_FROMTO */ -}; - -static const struct eqnstr eqnpiles[EQNPILE__MAX] = { - { "", 0 }, /* EQNPILE_NONE */ - { "pile", 4 }, /* EQNPILE_PILE */ - { "cpile", 5 }, /* EQNPILE_CPILE */ - { "rpile", 5 }, /* EQNPILE_RPILE */ - { "lpile", 5 }, /* EQNPILE_LPILE */ - { "col", 3 }, /* EQNPILE_COL */ - { "ccol", 4 }, /* EQNPILE_CCOL */ - { "rcol", 4 }, /* EQNPILE_RCOL */ - { "lcol", 4 }, /* EQNPILE_LCOL */ -}; - static const struct eqnsym eqnsyms[EQNSYM__MAX] = { - { { "alpha", 5 }, "*a" }, /* EQNSYM_alpha */ - { { "beta", 4 }, "*b" }, /* EQNSYM_beta */ - { { "chi", 3 }, "*x" }, /* EQNSYM_chi */ - { { "delta", 5 }, "*d" }, /* EQNSYM_delta */ - { { "epsilon", 7 }, "*e" }, /* EQNSYM_epsilon */ - { { "eta", 3 }, "*y" }, /* EQNSYM_eta */ - { { "gamma", 5 }, "*g" }, /* EQNSYM_gamma */ - { { "iota", 4 }, "*i" }, /* EQNSYM_iota */ - { { "kappa", 5 }, "*k" }, /* EQNSYM_kappa */ - { { "lambda", 6 }, "*l" }, /* EQNSYM_lambda */ - { { "mu", 2 }, "*m" }, /* EQNSYM_mu */ - { { "nu", 2 }, "*n" }, /* EQNSYM_nu */ - { { "omega", 5 }, "*w" }, /* EQNSYM_omega */ - { { "omicron", 7 }, "*o" }, /* EQNSYM_omicron */ - { { "phi", 3 }, "*f" }, /* EQNSYM_phi */ - { { "pi", 2 }, "*p" }, /* EQNSYM_pi */ - { { "psi", 2 }, "*q" }, /* EQNSYM_psi */ - { { "rho", 3 }, "*r" }, /* EQNSYM_rho */ - { { "sigma", 5 }, "*s" }, /* EQNSYM_sigma */ - { { "tau", 3 }, "*t" }, /* EQNSYM_tau */ - { { "theta", 5 }, "*h" }, /* EQNSYM_theta */ - { { "upsilon", 7 }, "*u" }, /* EQNSYM_upsilon */ - { { "xi", 2 }, "*c" }, /* EQNSYM_xi */ - { { "zeta", 4 }, "*z" }, /* EQNSYM_zeta */ - { { "DELTA", 5 }, "*D" }, /* EQNSYM_DELTA */ - { { "GAMMA", 5 }, "*G" }, /* EQNSYM_GAMMA */ - { { "LAMBDA", 6 }, "*L" }, /* EQNSYM_LAMBDA */ - { { "OMEGA", 5 }, "*W" }, /* EQNSYM_OMEGA */ - { { "PHI", 3 }, "*F" }, /* EQNSYM_PHI */ - { { "PI", 2 }, "*P" }, /* EQNSYM_PI */ - { { "PSI", 3 }, "*Q" }, /* EQNSYM_PSI */ - { { "SIGMA", 5 }, "*S" }, /* EQNSYM_SIGMA */ - { { "THETA", 5 }, "*H" }, /* EQNSYM_THETA */ - { { "UPSILON", 7 }, "*U" }, /* EQNSYM_UPSILON */ - { { "XI", 2 }, "*C" }, /* EQNSYM_XI */ - { { "inter", 5 }, "ca" }, /* EQNSYM_inter */ - { { "union", 5 }, "cu" }, /* EQNSYM_union */ - { { "prod", 4 }, "product" }, /* EQNSYM_prod */ - { { "int", 3 }, "integral" }, /* EQNSYM_int */ - { { "sum", 3 }, "sum" }, /* EQNSYM_sum */ - { { "grad", 4 }, "gr" }, /* EQNSYM_grad */ - { { "del", 3 }, "gr" }, /* EQNSYM_del */ - { { "times", 5 }, "mu" }, /* EQNSYM_times */ - { { "cdot", 4 }, "pc" }, /* EQNSYM_cdot */ - { { "nothing", 7 }, "&" }, /* EQNSYM_nothing */ - { { "approx", 6 }, "~~" }, /* EQNSYM_approx */ - { { "prime", 5 }, "aq" }, /* EQNSYM_prime */ - { { "half", 4 }, "12" }, /* EQNSYM_half */ - { { "partial", 7 }, "pd" }, /* EQNSYM_partial */ - { { "inf", 3 }, "if" }, /* EQNSYM_inf */ - { { ">>", 2 }, ">>" }, /* EQNSYM_muchgreat */ - { { "<<", 2 }, "<<" }, /* EQNSYM_muchless */ - { { "<-", 2 }, "<-" }, /* EQNSYM_larrow */ - { { "->", 2 }, "->" }, /* EQNSYM_rarrow */ - { { "+-", 2 }, "+-" }, /* EQNSYM_pm */ - { { "!=", 2 }, "!=" }, /* EQNSYM_nequal */ - { { "==", 2 }, "==" }, /* EQNSYM_equiv */ - { { "<=", 2 }, "<=" }, /* EQNSYM_lessequal */ - { { ">=", 2 }, ">=" }, /* EQNSYM_moreequal */ + { "alpha", "*a" }, /* EQNSYM_alpha */ + { "beta", "*b" }, /* EQNSYM_beta */ + { "chi", "*x" }, /* EQNSYM_chi */ + { "delta", "*d" }, /* EQNSYM_delta */ + { "epsilon", "*e" }, /* EQNSYM_epsilon */ + { "eta", "*y" }, /* EQNSYM_eta */ + { "gamma", "*g" }, /* EQNSYM_gamma */ + { "iota", "*i" }, /* EQNSYM_iota */ + { "kappa", "*k" }, /* EQNSYM_kappa */ + { "lambda", "*l" }, /* EQNSYM_lambda */ + { "mu", "*m" }, /* EQNSYM_mu */ + { "nu", "*n" }, /* EQNSYM_nu */ + { "omega", "*w" }, /* EQNSYM_omega */ + { "omicron", "*o" }, /* EQNSYM_omicron */ + { "phi", "*f" }, /* EQNSYM_phi */ + { "pi", "*p" }, /* EQNSYM_pi */ + { "psi", "*q" }, /* EQNSYM_psi */ + { "rho", "*r" }, /* EQNSYM_rho */ + { "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 */ + { "SIGMA", "*S" }, /* EQNSYM_SIGMA */ + { "THETA", "*H" }, /* EQNSYM_THETA */ + { "UPSILON", "*U" }, /* EQNSYM_UPSILON */ + { "XI", "*C" }, /* EQNSYM_XI */ + { "inter", "ca" }, /* EQNSYM_inter */ + { "union", "cu" }, /* EQNSYM_union */ + { "prod", "product" }, /* EQNSYM_prod */ + { "int", "integral" }, /* EQNSYM_int */ + { "sum", "sum" }, /* EQNSYM_sum */ + { "grad", "gr" }, /* EQNSYM_grad */ + { "del", "gr" }, /* EQNSYM_del */ + { "times", "mu" }, /* EQNSYM_times */ + { "cdot", "pc" }, /* EQNSYM_cdot */ + { "nothing", "&" }, /* EQNSYM_nothing */ + { "approx", "~~" }, /* EQNSYM_approx */ + { "prime", "aq" }, /* EQNSYM_prime */ + { "half", "12" }, /* EQNSYM_half */ + { "partial", "pd" }, /* EQNSYM_partial */ + { "inf", "if" }, /* EQNSYM_inf */ + { ">>", ">>" }, /* EQNSYM_muchgreat */ + { "<<", "<<" }, /* EQNSYM_muchless */ + { "<-", "<-" }, /* EQNSYM_larrow */ + { "->", "->" }, /* EQNSYM_rarrow */ + { "+-", "+-" }, /* EQNSYM_pm */ + { "!=", "!=" }, /* EQNSYM_nequal */ + { "==", "==" }, /* EQNSYM_equiv */ + { "<=", "<=" }, /* EQNSYM_lessequal */ + { ">=", ">=" }, /* EQNSYM_moreequal */ }; - enum rofferr eqn_read(struct eqn_node **epp, int ln, const char *p, int pos, int *offs) @@ -353,386 +340,27 @@ eqn_alloc(const char *name, int pos, int line, struct mparse *parse) return(p); } -enum rofferr -eqn_end(struct eqn_node **epp) -{ - struct eqn_node *ep; - struct eqn_box *root; - enum eqn_rest c; - - ep = *epp; - *epp = NULL; - - ep->eqn.root = mandoc_calloc(1, sizeof(struct eqn_box)); - - root = ep->eqn.root; - root->type = EQN_ROOT; - - if (0 == ep->sz) - return(ROFF_IGN); - - if (EQN_DESCOPE == (c = eqn_eqn(ep, root))) { - EQN_MSG(MANDOCERR_EQNNSCOPE, ep); - c = EQN_ERR; - } - - return(EQN_EOF == c ? ROFF_EQN : ROFF_IGN); -} - -static enum eqn_rest -eqn_eqn(struct eqn_node *ep, struct eqn_box *last) -{ - struct eqn_box *bp; - enum eqn_rest c; - - bp = eqn_box_alloc(ep, last); - bp->type = EQN_SUBEXPR; - - while (EQN_OK == (c = eqn_box(ep, bp))) - /* Spin! */ ; - - return(c); -} - -static enum eqn_rest -eqn_matrix(struct eqn_node *ep, struct eqn_box *last) -{ - struct eqn_box *bp; - const char *start; - size_t sz; - enum eqn_rest c; - - bp = eqn_box_alloc(ep, last); - bp->type = EQN_MATRIX; - - if (NULL == (start = eqn_nexttok(ep, &sz))) { - EQN_MSG(MANDOCERR_EQNEOF, ep); - return(EQN_ERR); - } - if ( ! STRNEQ(start, sz, "{", 1)) { - EQN_MSG(MANDOCERR_EQNSYNT, ep); - return(EQN_ERR); - } - - while (EQN_OK == (c = eqn_box(ep, bp))) - switch (bp->last->pile) { - case EQNPILE_LCOL: - /* FALLTHROUGH */ - case EQNPILE_CCOL: - /* FALLTHROUGH */ - case EQNPILE_RCOL: - continue; - default: - EQN_MSG(MANDOCERR_EQNSYNT, ep); - return(EQN_ERR); - }; - - if (EQN_DESCOPE != c) { - if (EQN_EOF == c) - EQN_MSG(MANDOCERR_EQNEOF, ep); - return(EQN_ERR); - } - - eqn_rewind(ep); - start = eqn_nexttok(ep, &sz); - assert(start); - if (STRNEQ(start, sz, "}", 1)) - return(EQN_OK); - - EQN_MSG(MANDOCERR_EQNBADSCOPE, ep); - return(EQN_ERR); -} - -static enum eqn_rest -eqn_list(struct eqn_node *ep, struct eqn_box *last) -{ - struct eqn_box *bp; - const char *start; - size_t sz; - enum eqn_rest c; - - bp = eqn_box_alloc(ep, last); - bp->type = EQN_LIST; - - if (NULL == (start = eqn_nexttok(ep, &sz))) { - EQN_MSG(MANDOCERR_EQNEOF, ep); - return(EQN_ERR); - } - if ( ! STRNEQ(start, sz, "{", 1)) { - EQN_MSG(MANDOCERR_EQNSYNT, ep); - return(EQN_ERR); - } - - while (EQN_DESCOPE == (c = eqn_eqn(ep, bp))) { - eqn_rewind(ep); - start = eqn_nexttok(ep, &sz); - assert(start); - if ( ! STRNEQ(start, sz, "above", 5)) - break; - } - - if (EQN_DESCOPE != c) { - if (EQN_ERR != c) - EQN_MSG(MANDOCERR_EQNSCOPE, ep); - return(EQN_ERR); - } - - eqn_rewind(ep); - start = eqn_nexttok(ep, &sz); - assert(start); - if (STRNEQ(start, sz, "}", 1)) - return(EQN_OK); - - EQN_MSG(MANDOCERR_EQNBADSCOPE, ep); - return(EQN_ERR); -} - -static enum eqn_rest -eqn_box(struct eqn_node *ep, struct eqn_box *last) -{ - size_t sz; - const char *start; - char *left; - char sym[64]; - enum eqn_rest c; - int i, size; - struct eqn_box *bp; - - if (NULL == (start = eqn_nexttok(ep, &sz))) - return(EQN_EOF); - - if (STRNEQ(start, sz, "}", 1)) - return(EQN_DESCOPE); - else if (STRNEQ(start, sz, "right", 5)) - return(EQN_DESCOPE); - else if (STRNEQ(start, sz, "above", 5)) - return(EQN_DESCOPE); - else if (STRNEQ(start, sz, "mark", 4)) - return(EQN_OK); - else if (STRNEQ(start, sz, "lineup", 6)) - return(EQN_OK); - - for (i = 0; i < (int)EQN__MAX; i++) { - if ( ! EQNSTREQ(&eqnparts[i].str, start, sz)) - continue; - return((*eqnparts[i].fp)(ep) ? EQN_OK : EQN_ERR); - } - - if (STRNEQ(start, sz, "{", 1)) { - if (EQN_DESCOPE != (c = eqn_eqn(ep, last))) { - if (EQN_ERR != c) - EQN_MSG(MANDOCERR_EQNSCOPE, ep); - return(EQN_ERR); - } - eqn_rewind(ep); - start = eqn_nexttok(ep, &sz); - assert(start); - if (STRNEQ(start, sz, "}", 1)) - return(EQN_OK); - EQN_MSG(MANDOCERR_EQNBADSCOPE, ep); - return(EQN_ERR); - } - - for (i = 0; i < (int)EQNPILE__MAX; i++) { - if ( ! EQNSTREQ(&eqnpiles[i], start, sz)) - continue; - if (EQN_OK == (c = eqn_list(ep, last))) - last->last->pile = (enum eqn_pilet)i; - return(c); - } - - if (STRNEQ(start, sz, "matrix", 6)) - return(eqn_matrix(ep, last)); - - if (STRNEQ(start, sz, "left", 4)) { - if (NULL == (start = eqn_nexttok(ep, &sz))) { - EQN_MSG(MANDOCERR_EQNEOF, ep); - return(EQN_ERR); - } - left = mandoc_strndup(start, sz); - c = eqn_eqn(ep, last); - if (last->last) - last->last->left = left; - else - free(left); - if (EQN_DESCOPE != c) - return(c); - assert(last->last); - eqn_rewind(ep); - start = eqn_nexttok(ep, &sz); - assert(start); - if ( ! STRNEQ(start, sz, "right", 5)) - return(EQN_DESCOPE); - if (NULL == (start = eqn_nexttok(ep, &sz))) { - EQN_MSG(MANDOCERR_EQNEOF, ep); - return(EQN_ERR); - } - last->last->right = mandoc_strndup(start, sz); - return(EQN_OK); - } - - /* - * Positional elements (e.g., over, sub, sup, ...). - */ - for (i = 0; i < (int)EQNPOS__MAX; i++) { - /* Some elements don't have names (are virtual). */ - if (NULL == eqnposs[i].name) - continue; - else if ( ! EQNSTREQ(&eqnposs[i], start, sz)) - continue; - if (NULL == last->last) { - EQN_MSG(MANDOCERR_EQNSYNT, ep); - return(EQN_ERR); - } - /* - * If we encounter x sub y sup z, then according to the - * eqn manual, we regard this as x subsup y z. - */ - if (EQNPOS_SUP == i && - NULL != last->last->prev && - EQNPOS_SUB == last->last->prev->pos) - last->last->prev->pos = EQNPOS_SUBSUP; - else if (EQNPOS_TO == i && - NULL != last->last->prev && - EQNPOS_FROM == last->last->prev->pos) - last->last->prev->pos = EQNPOS_FROMTO; - else - last->last->pos = (enum eqn_post)i; - - if (EQN_EOF == (c = eqn_box(ep, last))) { - EQN_MSG(MANDOCERR_EQNEOF, ep); - return(EQN_ERR); - } - return(c); - } - - for (i = 0; i < (int)EQNMARK__MAX; i++) { - if ( ! EQNSTREQ(&eqnmarks[i], start, sz)) - continue; - if (NULL == last->last) { - EQN_MSG(MANDOCERR_EQNSYNT, ep); - return(EQN_ERR); - } - last->last->mark = (enum eqn_markt)i; - if (EQN_EOF == (c = eqn_box(ep, last))) { - EQN_MSG(MANDOCERR_EQNEOF, ep); - return(EQN_ERR); - } - return(c); - } - - for (i = 0; i < (int)EQNFONT__MAX; i++) { - if ( ! EQNSTREQ(&eqnfonts[i], start, sz)) - continue; - if (EQN_EOF == (c = eqn_box(ep, last))) { - EQN_MSG(MANDOCERR_EQNEOF, ep); - return(EQN_ERR); - } else if (EQN_OK == c) - last->last->font = (enum eqn_fontt)i; - return(c); - } - - if (STRNEQ(start, sz, "size", 4)) { - if (NULL == (start = eqn_nexttok(ep, &sz))) { - EQN_MSG(MANDOCERR_EQNEOF, ep); - return(EQN_ERR); - } - size = mandoc_strntoi(start, sz, 10); - if (EQN_EOF == (c = eqn_box(ep, last))) { - EQN_MSG(MANDOCERR_EQNEOF, ep); - return(EQN_ERR); - } else if (EQN_OK != c) - return(c); - last->last->size = size; - } - - bp = eqn_box_alloc(ep, last); - bp->type = EQN_TEXT; - for (i = 0; i < (int)EQNSYM__MAX; i++) - if (EQNSTREQ(&eqnsyms[i].str, start, sz)) { - sym[63] = '\0'; - (void)snprintf(sym, 62, "\\[%s]", eqnsyms[i].sym); - bp->text = mandoc_strdup(sym); - return(EQN_OK); - } - - bp->text = mandoc_strndup(start, sz); - return(EQN_OK); -} - -void -eqn_free(struct eqn_node *p) +/* + * Find the key "key" of the give size within our eqn-defined values. + */ +static struct eqn_def * +eqn_def_find(struct eqn_node *ep, const char *key, size_t sz) { int i; - eqn_box_free(p->eqn.root); - - for (i = 0; i < (int)p->defsz; i++) { - free(p->defs[i].key); - free(p->defs[i].val); - } - - free(p->eqn.name); - free(p->data); - free(p->defs); - free(p); -} - -static struct eqn_box * -eqn_box_alloc(struct eqn_node *ep, struct eqn_box *parent) -{ - struct eqn_box *bp; - - bp = mandoc_calloc(1, sizeof(struct eqn_box)); - bp->parent = parent; - bp->size = ep->gsize; - - if (NULL != parent->first) { - parent->last->next = bp; - bp->prev = parent->last; - } else - parent->first = bp; - - parent->last = bp; - return(bp); -} - -static void -eqn_box_free(struct eqn_box *bp) -{ - - if (bp->first) - eqn_box_free(bp->first); - if (bp->next) - eqn_box_free(bp->next); - - free(bp->text); - free(bp->left); - free(bp->right); - free(bp); -} - -static const char * -eqn_nextrawtok(struct eqn_node *ep, size_t *sz) -{ - - return(eqn_next(ep, '"', sz, 0)); -} - -static const char * -eqn_nexttok(struct eqn_node *ep, size_t *sz) -{ - - return(eqn_next(ep, '"', sz, 1)); -} - -static void -eqn_rewind(struct eqn_node *ep) -{ + 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]); - ep->cur = ep->rew; + return(NULL); } +/* + * Get the next token from the input stream using the given quote + * character. + * Optionally make any replacements. + */ static const char * eqn_next(struct eqn_node *ep, char quote, size_t *sz, int repl) { @@ -822,48 +450,157 @@ again: return(start); } -static int -eqn_do_ign1(struct eqn_node *ep) +/* + * Get the next delimited token using the default current quote + * character. + */ +static const char * +eqn_nexttok(struct eqn_node *ep, size_t *sz) { - if (NULL == eqn_nextrawtok(ep, NULL)) - EQN_MSG(MANDOCERR_EQNEOF, ep); - else - return(1); + return(eqn_next(ep, '"', sz, 1)); +} + +/* + * Get next token without replacement. + */ +static const char * +eqn_nextrawtok(struct eqn_node *ep, size_t *sz) +{ - return(0); + return(eqn_next(ep, '"', sz, 0)); } -static int -eqn_do_ign2(struct eqn_node *ep) +/* + * 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; - if (NULL == eqn_nextrawtok(ep, NULL)) - EQN_MSG(MANDOCERR_EQNEOF, ep); - else if (NULL == eqn_nextrawtok(ep, NULL)) - EQN_MSG(MANDOCERR_EQNEOF, ep); - else - return(1); + if (NULL != p) + *p = NULL; + + if (NULL == (start = eqn_nexttok(ep, &sz))) + return(EQN_TOK_EOF); + + for (i = 0; i < EQN_TOK__MAX; i++) { + if (NULL == eqn_toks[i]) + continue; + if (STRNEQ(start, sz, eqn_toks[i], strlen(eqn_toks[i]))) + break; + } + + if (i == EQN_TOK__MAX && NULL != p) + *p = mandoc_strndup(start, sz); + + return(i); +} + +static void +eqn_box_free(struct eqn_box *bp) +{ - return(0); + 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->size = ep->gsize; + + assert(NULL != parent); + + if (NULL != parent->first) { + assert(NULL != parent->last); + 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); +} + +/* + * Undefine a previously-defined string. + */ static int -eqn_do_tdefine(struct eqn_node *ep) +eqn_undef(struct eqn_node *ep) { + const char *start; + struct eqn_def *def; + size_t sz; - if (NULL == eqn_nextrawtok(ep, NULL)) - EQN_MSG(MANDOCERR_EQNEOF, ep); - else if (NULL == eqn_next(ep, ep->data[(int)ep->cur], NULL, 0)) + if (NULL == (start = eqn_nextrawtok(ep, &sz))) { EQN_MSG(MANDOCERR_EQNEOF, ep); - else - return(1); + return(0); + } else if (NULL != (def = eqn_def_find(ep, start, sz))) + def->keysz = 0; - return(0); + return(1); } static int -eqn_do_define(struct eqn_node *ep) +eqn_def(struct eqn_node *ep) { const char *start; size_t sz; @@ -879,7 +616,6 @@ eqn_do_define(struct eqn_node *ep) * 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++) @@ -906,7 +642,7 @@ eqn_do_define(struct eqn_node *ep) if (NULL == start) { EQN_MSG(MANDOCERR_EQNEOF, ep); - return(0); + return(-1); } def->valsz = sz; @@ -916,56 +652,449 @@ eqn_do_define(struct eqn_node *ep) return(1); } +/* + * Recursively parse an eqn(7) expression. + */ static int -eqn_do_gfont(struct eqn_node *ep) -{ - - if (NULL == eqn_nextrawtok(ep, NULL)) { - EQN_MSG(MANDOCERR_EQNEOF, ep); - return(0); - } - return(1); -} - -static int -eqn_do_gsize(struct eqn_node *ep) +eqn_parse(struct eqn_node *ep, struct eqn_box *parent) { + char *p; + enum eqn_tok tok; + enum eqn_post pos; + struct eqn_box *cur; + int rc, size; + size_t i, sz; + char sym[64]; const char *start; - size_t sz; - if (NULL == (start = eqn_nextrawtok(ep, &sz))) { - EQN_MSG(MANDOCERR_EQNEOF, ep); + assert(NULL != parent); +again: + + switch ((tok = eqn_tok_parse(ep, &p))) { + case (EQN_TOK_UNDEF): + if ((rc = eqn_undef(ep)) <= 0) + return(rc); + break; + case (EQN_TOK_NDEFINE): + case (EQN_TOK_DEFINE): + if ((rc = eqn_def(ep)) <= 0) + return(rc); + break; + case (EQN_TOK_TDEFINE): + if (NULL == eqn_nextrawtok(ep, NULL)) + EQN_MSG(MANDOCERR_EQNEOF, ep); + else if (NULL == eqn_next(ep, + ep->data[(int)ep->cur], NULL, 0)) + EQN_MSG(MANDOCERR_EQNEOF, ep); + break; + case (EQN_TOK_GFONT): + if (NULL == eqn_nextrawtok(ep, NULL)) { + EQN_MSG(MANDOCERR_EQNSYNT, ep); + return(-1); + } + 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 (NULL == parent->last) { + EQN_MSG(MANDOCERR_EQNSYNT, ep); + return(-1); + } + parent = eqn_box_makebinary + (ep, EQNPOS_NONE, parent); + parent->type = EQN_LISTONE; + parent->expectargs = 1; + 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): + tok = eqn_tok_parse(ep, NULL); + if (EQN_TOK__MAX != tok) { + EQN_MSG(MANDOCERR_EQNSYNT, ep); + return(-1); + } + break; + case (EQN_TOK_FAT): + case (EQN_TOK_ROMAN): + case (EQN_TOK_ITALIC): + case (EQN_TOK_BOLD): + while (parent->args == parent->expectargs) + if (NULL == (parent = parent->parent)) { + EQN_MSG(MANDOCERR_EQNSYNT, ep); + return(-1); + } + /* + * 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))) { + EQN_MSG(MANDOCERR_EQNSYNT, ep); + return(-1); + } + size = mandoc_strntoi(start, sz, 10); + if (-1 == size) { + EQN_MSG(MANDOCERR_EQNSYNT, ep); + return(-1); + } + 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 (NULL == parent->last) { + EQN_MSG(MANDOCERR_EQNSYNT, ep); + return(-1); + } + /* 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) + if (NULL == (parent = parent->parent)) { + EQN_MSG(MANDOCERR_EQNSYNT, ep); + return(-1); + } + /* + * 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 (NULL == parent->last) { + EQN_MSG(MANDOCERR_EQNSYNT, ep); + return(-1); + } + while (EQN_SUBEXPR == parent->type) + if (NULL == (parent = parent->parent)) { + EQN_MSG(MANDOCERR_EQNSYNT, ep); + return(-1); + } + 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. + */ + while (parent->type != EQN_LIST) + if (NULL == (parent = parent->parent)) { + EQN_MSG(MANDOCERR_EQNSYNT, ep); + return(-1); + } + if (EQN_TOK_RIGHT == tok) { + if (NULL == parent->left) { + EQN_MSG(MANDOCERR_EQNSYNT, ep); + return(-1); + } + if (NULL == (start = eqn_nexttok(ep, &sz))) { + EQN_MSG(MANDOCERR_EQNSYNT, ep); + return(-1); + } + /* 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); + } + if (NULL == (parent = parent->parent)) { + EQN_MSG(MANDOCERR_EQNSYNT, ep); + return(-1); + } + if (EQN_TOK_BRACE_CLOSE == tok && parent && + (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) + if (NULL == (parent = parent->parent)) { + EQN_MSG(MANDOCERR_EQNSYNT, ep); + return(-1); + } + 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) + if (NULL == (parent = parent->parent)) { + EQN_MSG(MANDOCERR_EQNSYNT, ep); + return(-1); + } + parent = eqn_box_alloc(ep, parent); + parent->type = EQN_LIST; + if (EQN_TOK_LEFT == tok) { + if (NULL == (start = eqn_nexttok(ep, &sz))) { + EQN_MSG(MANDOCERR_EQNSYNT, ep); + return(-1); + } + /* Handling depends on right/left. */ + 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) + if (NULL == (parent = parent->parent)) { + EQN_MSG(MANDOCERR_EQNSYNT, ep); + return(-1); + } + if (EQN_TOK_BRACE_OPEN != eqn_tok_parse(ep, NULL)) { + EQN_MSG(MANDOCERR_EQNSYNT, ep); + return(-1); + } + parent = eqn_box_alloc(ep, parent); + parent->type = EQN_PILE; + parent = eqn_box_alloc(ep, parent); + parent->type = EQN_LIST; + break; + case (EQN_TOK_ABOVE): + while (parent->type != EQN_PILE) + if (NULL == (parent = parent->parent)) { + EQN_MSG(MANDOCERR_EQNSYNT, ep); + return(-1); + } + parent = eqn_box_alloc(ep, parent); + parent->type = EQN_LIST; + break; + case (EQN_TOK_MATRIX): + while (parent->args == parent->expectargs) + if (NULL == (parent = parent->parent)) { + EQN_MSG(MANDOCERR_EQNSYNT, ep); + return(-1); + } + if (EQN_TOK_BRACE_OPEN != eqn_tok_parse(ep, NULL)) { + EQN_MSG(MANDOCERR_EQNSYNT, ep); + return(-1); + } + parent = eqn_box_alloc(ep, parent); + parent->type = EQN_MATRIX; + parent = eqn_box_alloc(ep, parent); + parent->type = EQN_LIST; + break; + case (EQN_TOK_EOF): + /* + * End of file! + * TODO: make sure we're not in an open subexpression. + */ return(0); + default: + assert(tok == EQN_TOK__MAX); + assert(NULL != p); + /* + * 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) + if (NULL == (parent = parent->parent)) { + EQN_MSG(MANDOCERR_EQNSYNT, ep); + free(p); + return(-1); + } + cur = eqn_box_alloc(ep, parent); + cur->type = EQN_TEXT; + for (i = 0; i < EQNSYM__MAX; i++) + if (0 == strcmp(eqnsyms[i].str, p)) { + (void)snprintf(sym, sizeof(sym), + "\\[%s]", eqnsyms[i].sym); + cur->text = mandoc_strdup(sym); + free(p); + break; + } + + if (i == EQNSYM__MAX) + cur->text = p; + /* + * Post-process list status. + */ + while (parent->type == EQN_LISTONE && + parent->args == parent->expectargs) + if (NULL == (parent = parent->parent)) { + EQN_MSG(MANDOCERR_EQNSYNT, ep); + return(-1); + } + break; } - ep->gsize = mandoc_strntoi(start, sz, 10); - return(1); + goto again; } -static int -eqn_do_undef(struct eqn_node *ep) +enum rofferr +eqn_end(struct eqn_node **epp) { - const char *start; - struct eqn_def *def; - size_t sz; + struct eqn_node *ep; - if (NULL == (start = eqn_nextrawtok(ep, &sz))) { - EQN_MSG(MANDOCERR_EQNEOF, ep); - return(0); - } else if (NULL != (def = eqn_def_find(ep, start, sz))) - def->keysz = 0; + ep = *epp; + *epp = NULL; - return(1); + ep->eqn.root = mandoc_calloc(1, sizeof(struct eqn_box)); + ep->eqn.root->expectargs = UINT_MAX; + return(0 == eqn_parse(ep, ep->eqn.root) ? ROFF_EQN : ROFF_IGN); } -static struct eqn_def * -eqn_def_find(struct eqn_node *ep, const char *key, size_t sz) +void +eqn_free(struct eqn_node *p) { int i; - for (i = 0; i < (int)ep->defsz; i++) - if (ep->defs[i].keysz && STRNEQ(ep->defs[i].key, - ep->defs[i].keysz, key, sz)) - return(&ep->defs[i]); + eqn_box_free(p->eqn.root); - return(NULL); + for (i = 0; i < (int)p->defsz; i++) { + free(p->defs[i].key); + free(p->defs[i].val); + } + + free(p->eqn.name); + free(p->data); + free(p->defs); + free(p); } |