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| author |   Ingo Schwarze <schwarze@openbsd.org> | 2015-02-12 12:24:33 +0000 |
|---|---|---|
| committer | Ingo Schwarze <schwarze@openbsd.org> | 2015-02-12 12:24:33 +0000 |
| commit | e89dd22a4fc303f8cdf4180c4fb9655a45e8e724 (patch) | |
| tree | 555addff5e528e9a957bfbbad3ddc582a60eec97 /mdoc.h | |
| parent | 69f54c346ec87b3899a95b224628d8df313bbc85 (diff) | |
| download | mandoc-e89dd22a4fc303f8cdf4180c4fb9655a45e8e724.tar.gz mandoc-e89dd22a4fc303f8cdf4180c4fb9655a45e8e724.tar.zst mandoc-e89dd22a4fc303f8cdf4180c4fb9655a45e8e724.zip | |
Delete the mdoc_node.pending pointer and the function calculating
it, make_pending(), which was the most difficult function of the
whole mdoc(7) parser. After almost five years of maintaining this
hellhole, i just noticed the pointer isn't needed after all.
Blocks are always rewound in the reverse order they were opened;
that even holds for broken blocks. Consequently, it is sufficient
to just mark broken blogs with the flag MDOC_BROKEN and breaking
blocks with the flag MDOC_ENDED. When rewinding, instead of iterating
the pending pointers, just iterate from each broken block to its
parents, rewinding all that are MDOC_ENDED and stopping after
processing the first ancestor that it not MDOC_BROKEN. For ENDBODY
markers, use the mdoc_node.body pointer in place of the former
mdoc_node.pending.
This also fixes an assertion failure found by jsg@ with afl,
test case #467 (Bo Bl It Bd Bc It), where (surprise surprise)
the pending pointer got corrupted.
Improved functionality, minus one function, minus one struct field,
minus 50 lines of code.
Diffstat (limited to 'mdoc.h')
| -rw-r--r-- | mdoc.h | 10 |
1 files changed, 5 insertions, 5 deletions
@@ -1,6 +1,7 @@ -/* $Id: mdoc.h,v 1.135 2015/02/05 00:14:13 schwarze Exp $ */ +/* $Id: mdoc.h,v 1.136 2015/02/12 12:24:33 schwarze Exp $ */ /* * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv> + * Copyright (c) 2014, 2015 Ingo Schwarze <schwarze@openbsd.org> * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above @@ -355,11 +356,11 @@ struct mdoc_node { enum mdoct tok; /* tok or MDOC__MAX if none */ int flags; #define MDOC_VALID (1 << 0) /* has been validated */ -#define MDOC_BREAK (1 << 1) /* has broken another block */ +#define MDOC_ENDED (1 << 1) /* gone past body end mark */ #define MDOC_EOS (1 << 2) /* at sentence boundary */ #define MDOC_LINE (1 << 3) /* first macro/text on line */ #define MDOC_SYNPRETTY (1 << 4) /* SYNOPSIS-style formatting */ -#define MDOC_ENDED (1 << 5) /* rendering has been ended */ +#define MDOC_BROKEN (1 << 5) /* must validate parent when ending */ #define MDOC_DELIMO (1 << 6) #define MDOC_DELIMC (1 << 7) enum mdoc_type type; /* AST node type */ @@ -368,9 +369,8 @@ struct mdoc_node { int prev_font; /* before entering this node */ /* FIXME: these can be union'd to shave a few bytes. */ struct mdoc_arg *args; /* BLOCK/ELEM */ - struct mdoc_node *pending; /* BLOCK */ struct mdoc_node *head; /* BLOCK */ - struct mdoc_node *body; /* BLOCK */ + struct mdoc_node *body; /* BLOCK/ENDBODY */ struct mdoc_node *tail; /* BLOCK */ char *string; /* TEXT */ const struct tbl_span *span; /* TBL */ |