Initial Rs/Re support.

[mandoc.git] / action.c

diff --git a/action.c b/action.c
index df5b67695237f5a30f8b2b5076c2d5c04fd5a807..f18bb780df1b6500b60ff5f6cce417e0087d7ad0 100644 (file)
--- a/action.c
+++ b/action.c
@@ -1,4 +1,4 @@
-/* $Id: action.c,v 1.22 2009/02/27 10:55:16 kristaps Exp $ */
+/* $Id: action.c,v 1.26 2009/02/28 19:15:28 kristaps Exp $ */

 /*
  * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
  *
 /*
  * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
  *


@@ -37,6 +37,8 @@ struct        actions {
 /* Per-macro action routines. */
 
 static int      post_bl(struct mdoc *);
 /* Per-macro action routines. */
 
 static int      post_bl(struct mdoc *);

+static int      post_bl_width(struct mdoc *);
+static int      post_bl_tagwidth(struct mdoc *);

 static int      post_sh(struct mdoc *);
 static int      post_os(struct mdoc *);
 static int      post_dt(struct mdoc *);
 static int      post_sh(struct mdoc *);
 static int      post_os(struct mdoc *);
 static int      post_dt(struct mdoc *);


@@ -157,11 +159,6 @@ const      struct actions mdoc_actions[MDOC_MAX] = {
 };
 
 
 };
 
 

-/*
- * The `Nm' macro sets the document's name when used the first time with
- * an argument.  Subsequent calls without a value will result in the
- * name value being used.
- */

 static int
 post_nm(struct mdoc *mdoc)
 {
 static int
 post_nm(struct mdoc *mdoc)
 {


@@ -170,6 +167,12 @@ post_nm(struct mdoc *mdoc)
        assert(MDOC_ELEM == mdoc->last->type);
        assert(MDOC_Nm == mdoc->last->tok);
 
        assert(MDOC_ELEM == mdoc->last->type);
        assert(MDOC_Nm == mdoc->last->tok);
 

+       /*
+        * The `Nm' macro sets the document's name when used the first
+        * time with an argument.  Subsequent calls without a value will
+        * result in the name value being used.
+        */
+

        if (mdoc->meta.name)
                return(1);
 
        if (mdoc->meta.name)
                return(1);
 


@@ -182,32 +185,51 @@ post_nm(struct mdoc *mdoc)
 }
 
 
 }
 
 

-/*
- * We keep track of the current section in order to provide warnings on
- * section ordering, per-section macros, and so on.
- */

 static int
 post_sh(struct mdoc *mdoc)
 {
        enum mdoc_sec    sec;
        char             buf[64];
 
 static int
 post_sh(struct mdoc *mdoc)
 {
        enum mdoc_sec    sec;
        char             buf[64];
 

+       /*
+        * We keep track of the current section /and/ the "named"
+        * section, which is one of the conventional ones, in order to
+        * check ordering.
+        */
+

        if (MDOC_HEAD != mdoc->last->type)
                return(1);
        if (xstrlcats(buf, mdoc->last->child, 64)) {
                if (SEC_CUSTOM != (sec = mdoc_atosec(buf)))
                        mdoc->lastnamed = sec;
                mdoc->lastsec = sec;
        if (MDOC_HEAD != mdoc->last->type)
                return(1);
        if (xstrlcats(buf, mdoc->last->child, 64)) {
                if (SEC_CUSTOM != (sec = mdoc_atosec(buf)))
                        mdoc->lastnamed = sec;
                mdoc->lastsec = sec;

-               return(1);
+       } else
+               return(mdoc_err(mdoc, "parameters too long"));
+
+       switch (mdoc->lastsec) {
+       case (SEC_RETURN_VALUES):
+               /* FALLTHROUGH */
+       case (SEC_ERRORS):
+               switch (mdoc->meta.msec) {
+               case (MSEC_2):
+                       /* FALLTHROUGH */
+               case (MSEC_3):
+                       /* FALLTHROUGH */
+               case (MSEC_9):
+                       break;
+               default:
+                       return(mdoc_warn(mdoc, WARN_COMPAT,
+                                       "inappropriate section for "
+                                       "manual section"));
+               }
+               break;
+       default:
+               break;

        }
        }

-
-       return(mdoc_err(mdoc, "macro parameters too long"));
+       return(1);

 }
 
 
 }
 
 

-/* 
- * Prologue title must be parsed into document meta-data.
- */

 static int
 post_dt(struct mdoc *mdoc)
 {
 static int
 post_dt(struct mdoc *mdoc)
 {


@@ -215,6 +237,10 @@ post_dt(struct mdoc *mdoc)
        char             *p;
        struct mdoc_node *n;
 
        char             *p;
        struct mdoc_node *n;
 

+       /* 
+        * Prologue title must be parsed into document meta-data.
+        */
+

        assert(MDOC_ELEM == mdoc->last->type);
        assert(MDOC_Dt == mdoc->last->tok);
 
        assert(MDOC_ELEM == mdoc->last->type);
        assert(MDOC_Dt == mdoc->last->tok);
 


@@ -256,14 +282,16 @@ post_dt(struct mdoc *mdoc)
 }
 
 
 }
 
 

-/* 
- * Prologue operating system must be parsed into document meta-data.
- */

 static int
 post_os(struct mdoc *mdoc)
 {
        char              buf[64];
 
 static int
 post_os(struct mdoc *mdoc)
 {
        char              buf[64];
 

+       /* 
+        * Prologue operating system must be parsed into document
+        * meta-data.
+        */
+

        assert(MDOC_ELEM == mdoc->last->type);
        assert(MDOC_Os == mdoc->last->tok);
        assert(NULL == mdoc->meta.os);
        assert(MDOC_ELEM == mdoc->last->type);
        assert(MDOC_Os == mdoc->last->tok);
        assert(NULL == mdoc->meta.os);


@@ -278,60 +306,164 @@ post_os(struct mdoc *mdoc)
 }
 
 
 }
 
 

-/* 
- * Transform -width MACRO values into real widths. 
- */

 static int
 static int

-post_bl(struct mdoc *mdoc)
+post_bl_tagwidth(struct mdoc *mdoc)

 {
 {

-       struct mdoc_block *bl;
-       size_t             width;
-       int                tok, i;
+       struct mdoc_node  *n;
+       struct mdoc_block *b;
+       int                sz;

        char               buf[32];
 
        char               buf[32];
 

-       if (MDOC_BLOCK != mdoc->last->type)
+       /*
+        * If -tag has been specified and -width has not been, then try
+        * to intuit our width from the first body element.  
+        */
+
+       b = &mdoc->last->data.block;
+
+       if (NULL == (n = b->body->child))

                return(1);
                return(1);

+       assert(MDOC_It == n->tok);
+
+       /*
+        * Use the text width, if a text node, or the default macro
+        * width if a macro.
+        */
+
+       if ((n = n->data.block.head->child)) {
+               if (MDOC_TEXT != n->type) {
+                       if (0 == (sz = mdoc_macro2len(n->tok)))
+                               sz = -1;
+               } else
+                       sz = (int)strlen(n->data.text.string) + 1;
+       } else
+               sz = -1;
+
+       if (-1 == sz) {
+               if ( ! mdoc_warn(mdoc, WARN_SYNTAX,
+                               "cannot determine default %s",
+                               mdoc_argnames[MDOC_Width]))
+                       return(0);
+               sz = 10;
+       }

 
 

-       bl = &mdoc->last->data.block;
+       (void)snprintf(buf, sizeof(buf), "%dn", sz);

 
 

-       for (i = 0; i < (int)bl->argc; i++)
-               if (MDOC_Width == bl->argv[i].arg)
-                       break;
+       /*
+        * We have to dynamically add this to the macro's argument list.
+        * We're guaranteed that a MDOC_Width doesn't already exist.
+        */

 
 

-       if (i == (int)bl->argc)
-               return(1);
+       (b->argc)++;
+       b->argv = xrealloc(b->argv, b->argc * sizeof(struct mdoc_arg));

 
 

-       assert(1 == bl->argv[i].sz);
-       if (MDOC_MAX == (tok = mdoc_find(mdoc, *bl->argv[i].value)))
-               return(1);
+       b->argv[b->argc - 1].arg = MDOC_Width;
+       b->argv[b->argc - 1].line = mdoc->last->line;
+       b->argv[b->argc - 1].pos = mdoc->last->pos;
+       b->argv[b->argc - 1].sz = 1;
+       b->argv[b->argc - 1].value = xcalloc(1, sizeof(char *));
+       b->argv[b->argc - 1].value[0] = xstrdup(buf);

 
 

-       if (0 == (width = mdoc_macro2len(tok))) 
+       mdoc_msg(mdoc, "adding %s argument: %dn", 
+                       mdoc_argnames[MDOC_Width], sz);
+
+       return(1);
+}
+
+
+static int
+post_bl_width(struct mdoc *mdoc)
+{
+       size_t            width;
+       int               i, tok;
+       char              buf[32];
+       char            **p;
+
+       for (i = 0; i < (int)mdoc->last->data.block.argc; i++) 
+               if (MDOC_Width == mdoc->last->data.block.argv[i].arg)
+                       break;
+
+       assert(i < (int)mdoc->last->data.block.argc);
+       assert(1 == mdoc->last->data.block.argv[i].sz);
+       p = &mdoc->last->data.block.argv[i].value[0];
+
+       /*
+        * If the value to -width is a macro, then we re-write it to be
+        * the macro's width as set in share/tmac/mdoc/doc-common.
+        */
+
+       if (xstrcmp(*p, "Ds")) {
+               if ( ! mdoc_warn(mdoc, WARN_COMPAT,
+                                       "%s argument deprecated",
+                                       mdoc_argnames[MDOC_Width]))
+                       return(0);
+               width = 8;
+       } else if (MDOC_MAX == (tok = mdoc_find(mdoc, *p)))
+               return(1);
+       else if (0 == (width = mdoc_macro2len(tok))) 

                return(mdoc_warn(mdoc, WARN_SYNTAX,
                return(mdoc_warn(mdoc, WARN_SYNTAX,

-                                       "-%s macro has no length", 
+                                       "%s macro has no length", 

                                        mdoc_argnames[MDOC_Width]));
 
        mdoc_msg(mdoc, "re-writing %s argument: %s -> %zun", 
                                        mdoc_argnames[MDOC_Width]));
 
        mdoc_msg(mdoc, "re-writing %s argument: %s -> %zun", 

-                       mdoc_argnames[MDOC_Width],
-                       *bl->argv[i].value, width);
+                       mdoc_argnames[MDOC_Width], *p, width);
+
+       /* The value already exists: free and reallocate it. */

 
 

-       /* FIXME: silently truncates. */

        (void)snprintf(buf, sizeof(buf), "%zun", width);
 
        (void)snprintf(buf, sizeof(buf), "%zun", width);
 

-       free(*bl->argv[i].value);
-       *bl->argv[i].value = strdup(buf);
+       free(*p);
+       *p = strdup(buf);
+
+       return(1);
+}
+
+
+static int
+post_bl(struct mdoc *mdoc)
+{
+       int               i, r;
+
+       if (MDOC_BLOCK != mdoc->last->type)
+               return(1);
+
+       /*
+        * These are fairly complicated, so we've broken them into two
+        * functions.  post_bl_tagwidth() is called when a -tag is
+        * specified, but no -width (it must be guessed).  The second
+        * when a -width is specified (macro indicators must be
+        * rewritten into real lengths).
+        */
+
+       for (r = i = 0; i < (int)mdoc->last->data.block.argc; i++) {
+               if (MDOC_Tag == mdoc->last->data.block.argv[i].arg)
+                       r |= 1 << 0;
+               if (MDOC_Width == mdoc->last->data.block.argv[i].arg)
+                       r |= 1 << 1;
+       }
+
+       if (r & (1 << 0) && ! (r & (1 << 1))) {
+               if ( ! post_bl_tagwidth(mdoc))
+                       return(0);
+       } else if (r & (1 << 1))
+               if ( ! post_bl_width(mdoc))
+                       return(0);

 
        return(1);
 }
 
 
 
        return(1);
 }
 
 

-/* 
- * Prologue date must be parsed into document meta-data.
- */

 static int
 post_dd(struct mdoc *mdoc)
 {
        char              buf[64];
 
 static int
 post_dd(struct mdoc *mdoc)
 {
        char              buf[64];
 

+       /* 
+        * Prologue date must be parsed into document meta-data.  We
+        * accept multiple kinds of dates, described mostly in
+        * mdoc_atotime().
+        */
+

        assert(MDOC_ELEM == mdoc->last->type);
        assert(MDOC_Dd == mdoc->last->tok);
 
        assert(MDOC_ELEM == mdoc->last->type);
        assert(MDOC_Dd == mdoc->last->tok);
 


@@ -348,15 +480,16 @@ post_dd(struct mdoc *mdoc)
 }
 
 
 }
 
 

-/*
- * The end document shouldn't have the prologue macros as part of the
- * syntax tree (they encompass only meta-data). 
- */

 static int
 post_prologue(struct mdoc *mdoc)
 {
        struct mdoc_node *n;
 
 static int
 post_prologue(struct mdoc *mdoc)
 {
        struct mdoc_node *n;
 

+       /* 
+        * The end document shouldn't have the prologue macros as part
+        * of the syntax tree (they encompass only meta-data).  
+        */
+

        if (mdoc->last->parent->child == mdoc->last)
                mdoc->last->parent->child = mdoc->last->prev;
        if (mdoc->last->prev)
        if (mdoc->last->parent->child == mdoc->last)
                mdoc->last->parent->child = mdoc->last->prev;
        if (mdoc->last->prev)