version 1.12, 2010/02/17 19:22:01 |
version 1.13, 2010/03/27 10:04:56 |
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.Dd $Mdocdate$ |
.Dd $Mdocdate$ |
.Dt MAN 3 |
.Dt MAN 3 |
.Os |
.Os |
.\" SECTION |
. |
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. |
.Sh NAME |
.Sh NAME |
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.Nm man , |
.Nm man_alloc , |
.Nm man_alloc , |
.Nm man_parseln , |
.Nm man_parseln , |
.Nm man_endparse , |
.Nm man_endparse , |
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.Nm man_free , |
.Nm man_free , |
.Nm man_reset |
.Nm man_reset |
.Nd man macro compiler library |
.Nd man macro compiler library |
.\" SECTION |
. |
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. |
.Sh SYNOPSIS |
.Sh SYNOPSIS |
.In man.h |
.In man.h |
.Vt extern const char * const * man_macronames; |
.Vt extern const char * const * man_macronames; |
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.Fn man_meta "const struct man *man" |
.Fn man_meta "const struct man *man" |
.Ft int |
.Ft int |
.Fn man_endparse "struct man *man" |
.Fn man_endparse "struct man *man" |
.\" SECTION |
. |
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. |
.Sh DESCRIPTION |
.Sh DESCRIPTION |
The |
The |
.Nm man |
.Nm |
library parses lines of |
library parses lines of |
.Xr man 7 |
.Xr man 7 |
input (and |
input (and |
.Em only |
.Em only |
man) into an abstract syntax tree (AST). |
man) into an abstract syntax tree (AST). |
.\" PARAGRAPH |
. |
.Pp |
.Pp |
In general, applications initiate a parsing sequence with |
In general, applications initiate a parsing sequence with |
.Fn man_alloc , |
.Fn man_alloc , |
Line 74 function may be used in order to reset the parser for |
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Line 78 function may be used in order to reset the parser for |
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sequence. See the |
sequence. See the |
.Sx EXAMPLES |
.Sx EXAMPLES |
section for a full example. |
section for a full example. |
.\" PARAGRAPH |
. |
.Pp |
.Pp |
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Beyond the full set of macros defined in |
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.Xr man 7 , |
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the |
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.Nm |
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library also accepts the following macros: |
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. |
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.Pp |
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.Bl -tag -width Ds -compact |
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.It am |
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.It ami |
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.It de |
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.It dei |
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.It ig |
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Instructional macros in the original roff language. Blocks begun by |
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these macros end with |
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.Sq .. |
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and may begin anywhere, although they may not break the next-line |
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scoping rules specified in |
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.Xr man 7 . |
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These blocks are discarded. |
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. |
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.It PD |
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Has no effect. Handled as a current-scope line macro. |
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. |
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.It Sp |
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A synonym for |
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.Sq sp 0.5v |
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.Pq part of the standard preamble for Perl documentation . |
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Handled as a line macro. |
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. |
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.It UC |
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Has no effect. Handled as a current-scope line macro. |
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. |
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.It Vb |
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A synonym for |
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.Sq nf |
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.Pq part of the standard preamble for Perl documentation . |
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Handled as a current-scope line macro. |
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. |
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.It Ve |
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A synonym for |
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.Sq fi , |
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closing |
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.Sq Vb |
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.Pq part of the standard preamble for Perl documentation . |
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Handled as a current-scope line macro. |
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.El |
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. |
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. |
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.Sh REFERENCE |
This section further defines the |
This section further defines the |
.Sx Types , |
.Sx Types , |
.Sx Functions |
.Sx Functions |
|
|
available to programmers. Following that, the |
available to programmers. Following that, the |
.Sx Abstract Syntax Tree |
.Sx Abstract Syntax Tree |
section documents the output tree. |
section documents the output tree. |
.\" SUBSECTION |
. |
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. |
.Ss Types |
.Ss Types |
Both functions (see |
Both functions (see |
.Sx Functions ) |
.Sx Functions ) |
Line 92 and variables (see |
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Line 147 and variables (see |
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.Sx Variables ) |
.Sx Variables ) |
may use the following types: |
may use the following types: |
.Bl -ohang |
.Bl -ohang |
.\" LIST-ITEM |
. |
.It Vt struct man |
.It Vt struct man |
An opaque type defined in |
An opaque type defined in |
.Pa man.c . |
.Pa man.c . |
Its values are only used privately within the library. |
Its values are only used privately within the library. |
.\" LIST-ITEM |
. |
.It Vt struct man_cb |
.It Vt struct man_cb |
A set of message callbacks defined in |
A set of message callbacks defined in |
.Pa man.h . |
.Pa man.h . |
.\" LIST-ITEM |
. |
.It Vt struct man_node |
.It Vt struct man_node |
A parsed node. Defined in |
A parsed node. Defined in |
.Pa man.h . |
.Pa man.h . |
|
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.Sx Abstract Syntax Tree |
.Sx Abstract Syntax Tree |
for details. |
for details. |
.El |
.El |
.\" SUBSECTION |
. |
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. |
.Ss Functions |
.Ss Functions |
Function descriptions follow: |
Function descriptions follow: |
.Bl -ohang |
.Bl -ohang |
.\" LIST-ITEM |
. |
.It Fn man_alloc |
.It Fn man_alloc |
Allocates a parsing structure. The |
Allocates a parsing structure. The |
.Fa data |
.Fa data |
Line 126 arguments are defined in |
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Line 182 arguments are defined in |
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.Pa man.h . |
.Pa man.h . |
Returns NULL on failure. If non-NULL, the pointer must be freed with |
Returns NULL on failure. If non-NULL, the pointer must be freed with |
.Fn man_free . |
.Fn man_free . |
.\" LIST-ITEM |
. |
.It Fn man_reset |
.It Fn man_reset |
Reset the parser for another parse routine. After its use, |
Reset the parser for another parse routine. After its use, |
.Fn man_parseln |
.Fn man_parseln |
behaves as if invoked for the first time. |
behaves as if invoked for the first time. |
.\" LIST-ITEM |
. |
.It Fn man_free |
.It Fn man_free |
Free all resources of a parser. The pointer is no longer valid after |
Free all resources of a parser. The pointer is no longer valid after |
invocation. |
invocation. |
.\" LIST-ITEM |
. |
.It Fn man_parseln |
.It Fn man_parseln |
Parse a nil-terminated line of input. This line should not contain the |
Parse a nil-terminated line of input. This line should not contain the |
trailing newline. Returns 0 on failure, 1 on success. The input buffer |
trailing newline. Returns 0 on failure, 1 on success. The input buffer |
.Fa buf |
.Fa buf |
is modified by this function. |
is modified by this function. |
.\" LIST-ITEM |
. |
.It Fn man_endparse |
.It Fn man_endparse |
Signals that the parse is complete. Note that if |
Signals that the parse is complete. Note that if |
.Fn man_endparse |
.Fn man_endparse |
is called subsequent to |
is called subsequent to |
.Fn man_node , |
.Fn man_node , |
the resulting tree is incomplete. Returns 0 on failure, 1 on success. |
the resulting tree is incomplete. Returns 0 on failure, 1 on success. |
.\" LIST-ITEM |
. |
.It Fn man_node |
.It Fn man_node |
Returns the first node of the parse. Note that if |
Returns the first node of the parse. Note that if |
.Fn man_parseln |
.Fn man_parseln |
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.Fn man_endparse |
.Fn man_endparse |
return 0, the data will be incomplete. |
return 0, the data will be incomplete. |
.El |
.El |
.\" SUBSECTION |
. |
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. |
.Ss Variables |
.Ss Variables |
The following variables are also defined: |
The following variables are also defined: |
.Bl -ohang |
.Bl -ohang |
.\" LIST-ITEM |
. |
.It Va man_macronames |
.It Va man_macronames |
An array of string-ified token names. |
An array of string-ified token names. |
.El |
.El |
.\" SUBSECTION |
. |
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. |
.Ss Abstract Syntax Tree |
.Ss Abstract Syntax Tree |
The |
The |
.Nm |
.Nm |
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or |
or |
.Fn man_parseln |
.Fn man_parseln |
fail, it may be incomplete. |
fail, it may be incomplete. |
.\" PARAGRAPH |
. |
.Pp |
.Pp |
This AST is governed by the ontological |
This AST is governed by the ontological |
rules dictated in |
rules dictated in |
.Xr man 7 |
.Xr man 7 |
and derives its terminology accordingly. |
and derives its terminology accordingly. |
.\" PARAGRAPH |
. |
.Pp |
.Pp |
The AST is composed of |
The AST is composed of |
.Vt struct man_node |
.Vt struct man_node |
Line 210 fields), its position in the tree (the |
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Line 268 fields), its position in the tree (the |
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and |
and |
.Va prev |
.Va prev |
fields) and some type-specific data. |
fields) and some type-specific data. |
.\" PARAGRAPH |
. |
.Pp |
.Pp |
The tree itself is arranged according to the following normal form, |
The tree itself is arranged according to the following normal form, |
where capitalised non-terminals represent nodes. |
where capitalised non-terminals represent nodes. |
.Pp |
.Pp |
.Bl -tag -width "ELEMENTXX" -compact |
.Bl -tag -width "ELEMENTXX" -compact |
.\" LIST-ITEM |
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.It ROOT |
.It ROOT |
\(<- mnode+ |
\(<- mnode+ |
.It mnode |
.It mnode |
Line 232 where capitalised non-terminals represent nodes. |
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Line 289 where capitalised non-terminals represent nodes. |
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.It TEXT |
.It TEXT |
\(<- [[:alpha:]]* |
\(<- [[:alpha:]]* |
.El |
.El |
.\" PARAGRAPH |
. |
.Pp |
.Pp |
The only elements capable of nesting other elements are those with |
The only elements capable of nesting other elements are those with |
next-lint scope as documented in |
next-lint scope as documented in |
.Xr man 7 . |
.Xr man 7 . |
.\" SECTION |
. |
|
. |
.Sh EXAMPLES |
.Sh EXAMPLES |
The following example reads lines from stdin and parses them, operating |
The following example reads lines from stdin and parses them, operating |
on the finished parse tree with |
on the finished parse tree with |
Line 273 if (NULL == (node = man_node(man))) |
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Line 331 if (NULL == (node = man_node(man))) |
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parsed(man, node); |
parsed(man, node); |
man_free(man); |
man_free(man); |
.Ed |
.Ed |
.\" SECTION |
. |
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. |
.Sh SEE ALSO |
.Sh SEE ALSO |
.Xr mandoc 1 , |
.Xr mandoc 1 , |
.Xr man 7 |
.Xr man 7 |
.\" SECTION |
. |
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. |
.Sh AUTHORS |
.Sh AUTHORS |
The |
The |
.Nm |
.Nm |