/* $Id: mdoc.c,v 1.78 2011/01/09 13:16:48 schwarze Exp $ */ /* * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons * Copyright (c) 2010 Ingo Schwarze * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include #include #include #include #include #include "mandoc.h" #include "libmdoc.h" #include "libmandoc.h" const char *const __mdoc_macronames[MDOC_MAX] = { "Ap", "Dd", "Dt", "Os", "Sh", "Ss", "Pp", "D1", "Dl", "Bd", "Ed", "Bl", "El", "It", "Ad", "An", "Ar", "Cd", "Cm", "Dv", "Er", "Ev", "Ex", "Fa", "Fd", "Fl", "Fn", "Ft", "Ic", "In", "Li", "Nd", "Nm", "Op", "Ot", "Pa", "Rv", "St", "Va", "Vt", /* LINTED */ "Xr", "%A", "%B", "%D", /* LINTED */ "%I", "%J", "%N", "%O", /* LINTED */ "%P", "%R", "%T", "%V", "Ac", "Ao", "Aq", "At", "Bc", "Bf", "Bo", "Bq", "Bsx", "Bx", "Db", "Dc", "Do", "Dq", "Ec", "Ef", "Em", "Eo", "Fx", "Ms", "No", "Ns", "Nx", "Ox", "Pc", "Pf", "Po", "Pq", "Qc", "Ql", "Qo", "Qq", "Re", "Rs", "Sc", "So", "Sq", "Sm", "Sx", "Sy", "Tn", "Ux", "Xc", "Xo", "Fo", "Fc", "Oo", "Oc", "Bk", "Ek", "Bt", "Hf", "Fr", "Ud", "Lb", "Lp", "Lk", "Mt", "Brq", "Bro", /* LINTED */ "Brc", "%C", "Es", "En", /* LINTED */ "Dx", "%Q", "br", "sp", /* LINTED */ "%U", "Ta" }; const char *const __mdoc_argnames[MDOC_ARG_MAX] = { "split", "nosplit", "ragged", "unfilled", "literal", "file", "offset", "bullet", "dash", "hyphen", "item", "enum", "tag", "diag", "hang", "ohang", "inset", "column", "width", "compact", "std", "filled", "words", "emphasis", "symbolic", "nested", "centered" }; const char * const *mdoc_macronames = __mdoc_macronames; const char * const *mdoc_argnames = __mdoc_argnames; static void mdoc_node_free(struct mdoc_node *); static void mdoc_node_unlink(struct mdoc *, struct mdoc_node *); static void mdoc_free1(struct mdoc *); static void mdoc_alloc1(struct mdoc *); static struct mdoc_node *node_alloc(struct mdoc *, int, int, enum mdoct, enum mdoc_type); static int node_append(struct mdoc *, struct mdoc_node *); static int mdoc_ptext(struct mdoc *, int, char *, int); static int mdoc_pmacro(struct mdoc *, int, char *, int); static int mdoc_span_alloc(struct mdoc *, const struct tbl_span *); const struct mdoc_node * mdoc_node(const struct mdoc *m) { assert( ! (MDOC_HALT & m->flags)); return(m->first); } const struct mdoc_meta * mdoc_meta(const struct mdoc *m) { assert( ! (MDOC_HALT & m->flags)); return(&m->meta); } /* * Frees volatile resources (parse tree, meta-data, fields). */ static void mdoc_free1(struct mdoc *mdoc) { if (mdoc->first) mdoc_node_delete(mdoc, mdoc->first); if (mdoc->meta.title) free(mdoc->meta.title); if (mdoc->meta.os) free(mdoc->meta.os); if (mdoc->meta.name) free(mdoc->meta.name); if (mdoc->meta.arch) free(mdoc->meta.arch); if (mdoc->meta.vol) free(mdoc->meta.vol); if (mdoc->meta.msec) free(mdoc->meta.msec); } /* * Allocate all volatile resources (parse tree, meta-data, fields). */ static void mdoc_alloc1(struct mdoc *mdoc) { memset(&mdoc->meta, 0, sizeof(struct mdoc_meta)); mdoc->flags = 0; mdoc->lastnamed = mdoc->lastsec = SEC_NONE; mdoc->last = mandoc_calloc(1, sizeof(struct mdoc_node)); mdoc->first = mdoc->last; mdoc->last->type = MDOC_ROOT; mdoc->next = MDOC_NEXT_CHILD; } /* * Free up volatile resources (see mdoc_free1()) then re-initialises the * data with mdoc_alloc1(). After invocation, parse data has been reset * and the parser is ready for re-invocation on a new tree; however, * cross-parse non-volatile data is kept intact. */ void mdoc_reset(struct mdoc *mdoc) { mdoc_free1(mdoc); mdoc_alloc1(mdoc); } /* * Completely free up all volatile and non-volatile parse resources. * After invocation, the pointer is no longer usable. */ void mdoc_free(struct mdoc *mdoc) { mdoc_free1(mdoc); free(mdoc); } /* * Allocate volatile and non-volatile parse resources. */ struct mdoc * mdoc_alloc(struct regset *regs, void *data, mandocmsg msg) { struct mdoc *p; p = mandoc_calloc(1, sizeof(struct mdoc)); p->msg = msg; p->data = data; p->regs = regs; mdoc_hash_init(); mdoc_alloc1(p); return(p); } /* * Climb back up the parse tree, validating open scopes. Mostly calls * through to macro_end() in macro.c. */ int mdoc_endparse(struct mdoc *m) { assert( ! (MDOC_HALT & m->flags)); if (mdoc_macroend(m)) return(1); m->flags |= MDOC_HALT; return(0); } int mdoc_addspan(struct mdoc *m, const struct tbl_span *sp) { assert( ! (MDOC_HALT & m->flags)); /* No text before an initial macro. */ if (SEC_NONE == m->lastnamed) { /* FIXME: grab from span. */ mdoc_pmsg(m, 0, 0, MANDOCERR_NOTEXT); return(1); } return(mdoc_span_alloc(m, sp)); } /* * Main parse routine. Parses a single line -- really just hands off to * the macro (mdoc_pmacro()) or text parser (mdoc_ptext()). */ int mdoc_parseln(struct mdoc *m, int ln, char *buf, int offs) { assert( ! (MDOC_HALT & m->flags)); m->flags |= MDOC_NEWLINE; /* * Let the roff nS register switch SYNOPSIS mode early, * such that the parser knows at all times * whether this mode is on or off. * Note that this mode is also switched by the Sh macro. */ if (m->regs->regs[(int)REG_nS].set) { if (m->regs->regs[(int)REG_nS].v.u) m->flags |= MDOC_SYNOPSIS; else m->flags &= ~MDOC_SYNOPSIS; } return(('.' == buf[offs] || '\'' == buf[offs]) ? mdoc_pmacro(m, ln, buf, offs) : mdoc_ptext(m, ln, buf, offs)); } int mdoc_vmsg(struct mdoc *mdoc, enum mandocerr t, int ln, int pos, const char *fmt, ...) { char buf[256]; va_list ap; va_start(ap, fmt); vsnprintf(buf, sizeof(buf) - 1, fmt, ap); va_end(ap); return((*mdoc->msg)(t, mdoc->data, ln, pos, buf)); } int mdoc_macro(MACRO_PROT_ARGS) { assert(tok < MDOC_MAX); /* If we're in the body, deny prologue calls. */ if (MDOC_PROLOGUE & mdoc_macros[tok].flags && MDOC_PBODY & m->flags) { mdoc_pmsg(m, line, ppos, MANDOCERR_BADBODY); return(1); } /* If we're in the prologue, deny "body" macros. */ if ( ! (MDOC_PROLOGUE & mdoc_macros[tok].flags) && ! (MDOC_PBODY & m->flags)) { mdoc_pmsg(m, line, ppos, MANDOCERR_BADPROLOG); if (NULL == m->meta.msec) m->meta.msec = mandoc_strdup("1"); if (NULL == m->meta.title) m->meta.title = mandoc_strdup("UNKNOWN"); if (NULL == m->meta.vol) m->meta.vol = mandoc_strdup("LOCAL"); if (NULL == m->meta.os) m->meta.os = mandoc_strdup("LOCAL"); if (0 == m->meta.date) m->meta.date = time(NULL); m->flags |= MDOC_PBODY; } return((*mdoc_macros[tok].fp)(m, tok, line, ppos, pos, buf)); } static int node_append(struct mdoc *mdoc, struct mdoc_node *p) { assert(mdoc->last); assert(mdoc->first); assert(MDOC_ROOT != p->type); switch (mdoc->next) { case (MDOC_NEXT_SIBLING): mdoc->last->next = p; p->prev = mdoc->last; p->parent = mdoc->last->parent; break; case (MDOC_NEXT_CHILD): mdoc->last->child = p; p->parent = mdoc->last; break; default: abort(); /* NOTREACHED */ } p->parent->nchild++; /* * Copy over the normalised-data pointer of our parent. Not * everybody has one, but copying a null pointer is fine. */ switch (p->type) { case (MDOC_BODY): /* FALLTHROUGH */ case (MDOC_TAIL): /* FALLTHROUGH */ case (MDOC_HEAD): p->norm = p->parent->norm; break; default: break; } if ( ! mdoc_valid_pre(mdoc, p)) return(0); switch (p->type) { case (MDOC_HEAD): assert(MDOC_BLOCK == p->parent->type); p->parent->head = p; break; case (MDOC_TAIL): assert(MDOC_BLOCK == p->parent->type); p->parent->tail = p; break; case (MDOC_BODY): if (p->end) break; assert(MDOC_BLOCK == p->parent->type); p->parent->body = p; break; default: break; } mdoc->last = p; switch (p->type) { case (MDOC_TBL): /* FALLTHROUGH */ case (MDOC_TEXT): if ( ! mdoc_valid_post(mdoc)) return(0); break; default: break; } return(1); } static struct mdoc_node * node_alloc(struct mdoc *m, int line, int pos, enum mdoct tok, enum mdoc_type type) { struct mdoc_node *p; p = mandoc_calloc(1, sizeof(struct mdoc_node)); p->sec = m->lastsec; p->line = line; p->pos = pos; p->tok = tok; p->type = type; /* Flag analysis. */ if (MDOC_SYNOPSIS & m->flags) p->flags |= MDOC_SYNPRETTY; else p->flags &= ~MDOC_SYNPRETTY; if (MDOC_NEWLINE & m->flags) p->flags |= MDOC_LINE; m->flags &= ~MDOC_NEWLINE; return(p); } int mdoc_tail_alloc(struct mdoc *m, int line, int pos, enum mdoct tok) { struct mdoc_node *p; p = node_alloc(m, line, pos, tok, MDOC_TAIL); if ( ! node_append(m, p)) return(0); m->next = MDOC_NEXT_CHILD; return(1); } int mdoc_head_alloc(struct mdoc *m, int line, int pos, enum mdoct tok) { struct mdoc_node *p; assert(m->first); assert(m->last); p = node_alloc(m, line, pos, tok, MDOC_HEAD); if ( ! node_append(m, p)) return(0); m->next = MDOC_NEXT_CHILD; return(1); } int mdoc_body_alloc(struct mdoc *m, int line, int pos, enum mdoct tok) { struct mdoc_node *p; p = node_alloc(m, line, pos, tok, MDOC_BODY); if ( ! node_append(m, p)) return(0); m->next = MDOC_NEXT_CHILD; return(1); } int mdoc_endbody_alloc(struct mdoc *m, int line, int pos, enum mdoct tok, struct mdoc_node *body, enum mdoc_endbody end) { struct mdoc_node *p; p = node_alloc(m, line, pos, tok, MDOC_BODY); p->pending = body; p->end = end; if ( ! node_append(m, p)) return(0); m->next = MDOC_NEXT_SIBLING; return(1); } int mdoc_block_alloc(struct mdoc *m, int line, int pos, enum mdoct tok, struct mdoc_arg *args) { struct mdoc_node *p; p = node_alloc(m, line, pos, tok, MDOC_BLOCK); p->args = args; if (p->args) (args->refcnt)++; switch (tok) { case (MDOC_Bd): /* FALLTHROUGH */ case (MDOC_Bf): /* FALLTHROUGH */ case (MDOC_Bl): /* FALLTHROUGH */ case (MDOC_Rs): p->norm = mandoc_calloc(1, sizeof(union mdoc_data)); break; default: break; } if ( ! node_append(m, p)) return(0); m->next = MDOC_NEXT_CHILD; return(1); } int mdoc_elem_alloc(struct mdoc *m, int line, int pos, enum mdoct tok, struct mdoc_arg *args) { struct mdoc_node *p; p = node_alloc(m, line, pos, tok, MDOC_ELEM); p->args = args; if (p->args) (args->refcnt)++; switch (tok) { case (MDOC_An): p->norm = mandoc_calloc(1, sizeof(union mdoc_data)); break; default: break; } if ( ! node_append(m, p)) return(0); m->next = MDOC_NEXT_CHILD; return(1); } static int mdoc_span_alloc(struct mdoc *m, const struct tbl_span *sp) { struct mdoc_node *n; /* FIXME: grab from tbl_span. */ n = node_alloc(m, 0, 0, MDOC_MAX, MDOC_TBL); n->span = sp; if ( ! node_append(m, n)) return(0); m->next = MDOC_NEXT_SIBLING; return(1); } int mdoc_word_alloc(struct mdoc *m, int line, int pos, const char *p) { struct mdoc_node *n; size_t sv, len; len = strlen(p); n = node_alloc(m, line, pos, MDOC_MAX, MDOC_TEXT); n->string = mandoc_malloc(len + 1); sv = strlcpy(n->string, p, len + 1); /* Prohibit truncation. */ assert(sv < len + 1); if ( ! node_append(m, n)) return(0); m->next = MDOC_NEXT_SIBLING; return(1); } static void mdoc_node_free(struct mdoc_node *p) { if (MDOC_BLOCK == p->type || MDOC_ELEM == p->type) free(p->norm); if (p->string) free(p->string); if (p->args) mdoc_argv_free(p->args); free(p); } static void mdoc_node_unlink(struct mdoc *m, struct mdoc_node *n) { /* Adjust siblings. */ if (n->prev) n->prev->next = n->next; if (n->next) n->next->prev = n->prev; /* Adjust parent. */ if (n->parent) { n->parent->nchild--; if (n->parent->child == n) n->parent->child = n->prev ? n->prev : n->next; if (n->parent->last == n) n->parent->last = n->prev ? n->prev : NULL; } /* Adjust parse point, if applicable. */ if (m && m->last == n) { if (n->prev) { m->last = n->prev; m->next = MDOC_NEXT_SIBLING; } else { m->last = n->parent; m->next = MDOC_NEXT_CHILD; } } if (m && m->first == n) m->first = NULL; } void mdoc_node_delete(struct mdoc *m, struct mdoc_node *p) { while (p->child) { assert(p->nchild); mdoc_node_delete(m, p->child); } assert(0 == p->nchild); mdoc_node_unlink(m, p); mdoc_node_free(p); } /* * Parse free-form text, that is, a line that does not begin with the * control character. */ static int mdoc_ptext(struct mdoc *m, int line, char *buf, int offs) { char *c, *ws, *end; struct mdoc_node *n; /* Ignore bogus comments. */ if ('\\' == buf[offs] && '.' == buf[offs + 1] && '"' == buf[offs + 2]) { mdoc_pmsg(m, line, offs, MANDOCERR_BADCOMMENT); return(1); } /* No text before an initial macro. */ if (SEC_NONE == m->lastnamed) { mdoc_pmsg(m, line, offs, MANDOCERR_NOTEXT); return(1); } assert(m->last); n = m->last; /* * Divert directly to list processing if we're encountering a * columnar MDOC_BLOCK with or without a prior MDOC_BLOCK entry * (a MDOC_BODY means it's already open, in which case we should * process within its context in the normal way). */ if (MDOC_Bl == n->tok && MDOC_BODY == n->type && LIST_column == n->norm->Bl.type) { /* `Bl' is open without any children. */ m->flags |= MDOC_FREECOL; return(mdoc_macro(m, MDOC_It, line, offs, &offs, buf)); } if (MDOC_It == n->tok && MDOC_BLOCK == n->type && NULL != n->parent && MDOC_Bl == n->parent->tok && LIST_column == n->parent->norm->Bl.type) { /* `Bl' has block-level `It' children. */ m->flags |= MDOC_FREECOL; return(mdoc_macro(m, MDOC_It, line, offs, &offs, buf)); } /* * Search for the beginning of unescaped trailing whitespace (ws) * and for the first character not to be output (end). */ /* FIXME: replace with strcspn(). */ ws = NULL; for (c = end = buf + offs; *c; c++) { switch (*c) { case '-': if (mandoc_hyph(buf + offs, c)) *c = ASCII_HYPH; ws = NULL; break; case ' ': if (NULL == ws) ws = c; continue; case '\t': /* * Always warn about trailing tabs, * even outside literal context, * where they should be put on the next line. */ if (NULL == ws) ws = c; /* * Strip trailing tabs in literal context only; * outside, they affect the next line. */ if (MDOC_LITERAL & m->flags) continue; break; case '\\': /* Skip the escaped character, too, if any. */ if (c[1]) c++; /* FALLTHROUGH */ default: ws = NULL; break; } end = c + 1; } *end = '\0'; if (ws) mdoc_pmsg(m, line, (int)(ws-buf), MANDOCERR_EOLNSPACE); if ('\0' == buf[offs] && ! (MDOC_LITERAL & m->flags)) { mdoc_pmsg(m, line, (int)(c-buf), MANDOCERR_NOBLANKLN); /* * Insert a `sp' in the case of a blank line. Technically, * blank lines aren't allowed, but enough manuals assume this * behaviour that we want to work around it. */ if ( ! mdoc_elem_alloc(m, line, offs, MDOC_sp, NULL)) return(0); m->next = MDOC_NEXT_SIBLING; return(1); } if ( ! mdoc_word_alloc(m, line, offs, buf+offs)) return(0); if (MDOC_LITERAL & m->flags) return(1); /* * End-of-sentence check. If the last character is an unescaped * EOS character, then flag the node as being the end of a * sentence. The front-end will know how to interpret this. */ assert(buf < end); if (mandoc_eos(buf+offs, (size_t)(end-buf-offs), 0)) m->last->flags |= MDOC_EOS; return(1); } /* * Parse a macro line, that is, a line beginning with the control * character. */ static int mdoc_pmacro(struct mdoc *m, int ln, char *buf, int offs) { enum mdoct tok; int i, j, sv; char mac[5]; struct mdoc_node *n; /* Empty lines are ignored. */ offs++; if ('\0' == buf[offs]) return(1); i = offs; /* Accept tabs/whitespace after the initial control char. */ if (' ' == buf[i] || '\t' == buf[i]) { i++; while (buf[i] && (' ' == buf[i] || '\t' == buf[i])) i++; if ('\0' == buf[i]) return(1); } sv = i; /* * Copy the first word into a nil-terminated buffer. * Stop copying when a tab, space, or eoln is encountered. */ j = 0; while (j < 4 && '\0' != buf[i] && ' ' != buf[i] && '\t' != buf[i]) mac[j++] = buf[i++]; mac[j] = '\0'; tok = (j > 1 || j < 4) ? mdoc_hash_find(mac) : MDOC_MAX; if (MDOC_MAX == tok) { mdoc_vmsg(m, MANDOCERR_MACRO, ln, sv, "%s", buf + sv - 1); return(1); } /* Disregard the first trailing tab, if applicable. */ if ('\t' == buf[i]) i++; /* Jump to the next non-whitespace word. */ while (buf[i] && ' ' == buf[i]) i++; /* * Trailing whitespace. Note that tabs are allowed to be passed * into the parser as "text", so we only warn about spaces here. */ if ('\0' == buf[i] && ' ' == buf[i - 1]) mdoc_pmsg(m, ln, i - 1, MANDOCERR_EOLNSPACE); /* * If an initial macro or a list invocation, divert directly * into macro processing. */ if (NULL == m->last || MDOC_It == tok || MDOC_El == tok) { if ( ! mdoc_macro(m, tok, ln, sv, &i, buf)) goto err; return(1); } n = m->last; assert(m->last); /* * If the first macro of a `Bl -column', open an `It' block * context around the parsed macro. */ if (MDOC_Bl == n->tok && MDOC_BODY == n->type && LIST_column == n->norm->Bl.type) { m->flags |= MDOC_FREECOL; if ( ! mdoc_macro(m, MDOC_It, ln, sv, &sv, buf)) goto err; return(1); } /* * If we're following a block-level `It' within a `Bl -column' * context (perhaps opened in the above block or in ptext()), * then open an `It' block context around the parsed macro. */ if (MDOC_It == n->tok && MDOC_BLOCK == n->type && NULL != n->parent && MDOC_Bl == n->parent->tok && LIST_column == n->parent->norm->Bl.type) { m->flags |= MDOC_FREECOL; if ( ! mdoc_macro(m, MDOC_It, ln, sv, &sv, buf)) goto err; return(1); } /* Normal processing of a macro. */ if ( ! mdoc_macro(m, tok, ln, sv, &i, buf)) goto err; return(1); err: /* Error out. */ m->flags |= MDOC_HALT; return(0); }