.fp 5 CW

.de Af

.ds ;G \\*(;G\\f\\$1\\$3\\f\\$2

.if !?\\$4?? .Af \\$2 \\$1 "\\$4" "\\$5" "\\$6" "\\$7" "\\$8" "\\$9"

..

.de aF

.ie ?\\$3?? .ft \\$1

.el \{\

.ds ;G \&

.nr ;G \\n(.f

.Af "\\$1" "\\$2" "\\$3" "\\$4" "\\$5" "\\$6" "\\$7" "\\$8" "\\$9"

\\*(;G

.ft \\n(;G \}

..

.de L

.aF 5 \\n(.f "\\$1" "\\$2" "\\$3" "\\$4" "\\$5" "\\$6" "\\$7"

..

.de LR

.aF 5 1 "\\$1" "\\$2" "\\$3" "\\$4" "\\$5" "\\$6" "\\$7"

..

.de RL

.aF 1 5 "\\$1" "\\$2" "\\$3" "\\$4" "\\$5" "\\$6" "\\$7"

..

.de EX		\" start example

.ta 1i 2i 3i 4i 5i 6i

.PP

.PD 0

.ft 5

.nf

..

.de EE		\" end example

.fi

.ft

.PD

.PP

..

.de Tp

.fl

.ne 3

.TP

..

.de Ss

.fl

.ne 3

.SS "\\$1"

..

.ta 1.0i 2.0i 3.0i 4.0i 5.0i

.TH ASTSA 3

.SH NAME

astsa \- standalone libast support

.SH SYNOPSIS

.EX

#include <ast.h>

#include <ccode.h>

#include <error.h>

#include <option.h>

#include <stk.h>

.EE

.SH DESCRIPTION

.B astsa

is a standalone subset of

.BR ast (3)

that requires only

.BR cdt (3)

and

.BR sfio (3).

.PP

.B <ast.h>

includes

.BR <ast_common.h> ,

.B <stdarg.h>

or

.BR <varargs.h> ,

.BR <sfio.h> ,

.BR <limits.h> ,

and

.B <limits.h>

and

.B <unistd.h>

if supported by the local system.

.PP

The macros and functions provided by

.B <ast.h>

are described below.

The other headers are described in

.BR ccode (3),

.BR error (3),

.BR optget (3),

and

.BR stk (3).

.SH MACROS

.Ss "size_t elementsof(\fIx\fP)"

Evaluates to the number of elements in the array variable

.IR x .

.Ss "\fItype\fP* newof(void* old, \fItype\fP, size_t \fIelements\fP, size_t \fIextra\fP)"

Equivalent to (\fItype\fP*)realloc((char*)\fIold\fP,sizeof(\fItype\fP)*\fIelements\fP+\fIextra\fP)

if \fIold\fP!=0 and

(\fItype\fP*)calloc(1,sizeof(\fItype\fP)*\fIelements\fP+\fIextra\fP)

otherwise.

.Ss "\fItype\fP* oldof(void* old, \fItype\fP, size_t \fIelements\fP, size_t \fIextra\fP)"

Equivalent to (\fItype\fP*)realloc((char*)\fIold\fP,sizeof(\fItype\fP)*\fIelements\fP+\fIextra\fP)

if \fIold\fP!=0 and

(\fItype\fP*)malloc(1,sizeof(\fItype\fP)*\fIelements\fP+\fIextra\fP)

otherwise.

.Ss "size_t roundof(\fIx\fP,\fIy\fP)"

Evaluates to \fIx\fP rounded up to the next power of 2 boundary \fIy\fP.

.Ss "int ssizeof(\fIx\fP)"

Equivalent to (int)sizeof(\fIx\fP).

.Ss "int streq(\fIa\fP,\fIb\fP)"

Equivalent to (*(\fIa\fP)==*(\fIb\fP)&&strcmp(\fIa\fP,\fIb\fP)==0).

.Ss "int strneq(\fIa\fP,\fIb\fP,\fIn\fP)"

Equivalent to (*(\fIa\fP)==*(\fIb\fP)&&strncmp(\fIa\fP,\fIb\fP,\fIn\fP)==0).

.SH FUNCTIONS

.Ss "void astwinsize(int \fIfd\fP, int* \fIplines\fP, int* \fIpcolumns\fP)"

If \fIplines\fP!=0 then *\fIplines\fP is set to the number of lines on the

tty device corresponding to \fIfd\fP.

If \fIpcolumns\fP!=0 then *\fIpcolumns\fP is set to the number of columns

on the tty device corresponding to \fIfd\fP.

The default if \fIfd\fP is not a terminal device, or if \fIfd\fP queries fail,

is 24 lines and 80 columns.

.Ss "char* fmterror(int \fIerrno\fP)"

Returns the error message text corresponding to the

.BR errno (3)

\fIerrno\fP.

.Ss "char* strerror(int \fIerrno\fP)"

Equivalent to fmterror(\fIerrno\fP).

.Ss "int strgrpmatch(const char* \fIstring\fP, const char* \fIpattern\fP, int* \fIsub\fP, int \fInsub\fP, int \fIflags\fP)"

Matches the null terminated \fIstring\fP against the null terminated

.BR ksh (1)

augmented \fIpattern\fP.

If \fIsub\fP!=0 then \fIsub\fP[2*\fIi\fP] is set to the start offset and \fIsub\fP[2*\fIi\fP+1] is set

to the end offset of the \fIi\fP-th parenthesized subexpression.

\fInsub\fP is 1/2 the number of elements in \fIsub\fP.

\fIflags\fP controls the matching:

.Tp

\f5STR_MAXIMAL\fP:

Maximal match.

The default is minimal (first) match.

.Tp

\f5STR_LEFT\fP:

Implicit left anchor.

.Tp

\f5STR_RIGHT\fP:

Implicit right anchor.

.Tp

\f5STR_ICASE\fP:

Ignore case.

.Tp

\f5STR_GROUP\fP:

(|&) inside [@|*|+{n,m}](...) only.

.Ss "int strmatch(const char* \fIstring\fP, const char* \fIpattern\fP, int* \fIsub\fP, int \fInsub\fP, int \fIflags\fP)"

Equivalent to strgrpmatch(\fIstring\fP,\fIpattern\fP,0,0,STR_MAXIMAL|STR_LEFT|STR_RIGHT).

.SH "SEE ALSO"

.BR ast (3),

.BR ccode (3),

.BR cdt (3),

.BR error (3),

.BR malloc (3),

.BR option (3),

.BR sfio (3),

.BR stk (3)