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.\" $Header: glob.l,v 1.1 88/01/15 12:58:23 simpson Rel $
.\" $Log:	glob.l,v $
.\" Revision 1.1  88/01/15  12:58:23  simpson
.\" initial release
.\" 
.\" Revision 0.1  87/12/11  17:56:52  simpson
.\" beta test
.\" 
.TH GLOB 3 TRW
.UC
.SH NAME
glob \- shell style pattern matching
.SH SYNOPSIS
.nf
.B #include <local/glob.h>

.B int glob_compile(pattern, buffer)
.B char *pattern;
.B char *buffer;

.B int glob_execute(buffer, s)
.B char *buffer;
.B char *s;

.B int glob_match (pattern, s)
.B char *pattern;
.B char *s;
.fi

.B cc 
[ flags ] files
.B -lglob
[ libraries ]
.fi
.SH DESCRIPTION
.I Glob
is a pattern matching facility similar to that of
.IR sh (1)
and
.IR csh (1).
.PP
A pattern specifies a set of strings of characters.
A member of this set of strings is said to be matched by the pattern.
.TP
(1)
Any character except a special character matches itself.
The special characters are [ * and ?.
.TP
(2)
A ? matches any character.
.TP
(3)
A nonempty string
.I s
bracketed
.RI [ s ]
matches any character in
.IR s .
In
.I s
] may only appear as the first letter.
A substring
.IR a \- b ,
with
.I a
and
.I b
in ascending ASCII order,
stands for the inclusive range of ASCII characters.
.TP
(4)
A * matches 0 or more characters.
.PP
.I Glob_compile
compiles a
.I pattern
into an internal form suitable for matching,
placing the result in the character array
.IR buffer .
.I Buffer
must be a character array of size
.BR GLOB_MAX_PATTERN .
.I Glob_compile
returns 0 if the
.I pattern
was compiled successfully;
otherwise a negative error code is returned.
.PP
.I Glob_execute
checks the argument string
.I s
against the compiled
.IR pattern .
.I Glob_execute
returns 1 if the string
.I s
matches the compiled pattern in
.IR buffer ,
0 if the string
.I s
failed to match the compiled pattern in
.IR buffer ,
and a negative error code if the compiled pattern was invalid.
.PP
The strings passed to both
.I glob_compile
and
.I glob_execute
may have trailing or embedded newline characters;
they are terminated by nulls.
.PP
.I Glob_match
compiles
.I pattern
and matches it against the argument string
.IR s .
It returns 1 if the string
.I s
matches the pattern;
0 if the string
.I s
fails to match the pattern
and a negative error code if the pattern was invalid.
.SH AUTHOR
Michael Gorlick, TRW
.SH SEE ALSO
regex(3)
.SH DIAGNOSTICS
The following diagnostic codes are provided:
.TP
GLOB_OK
returned by
.I glob_compile
indicating the pattern compiled successfully;
.TP
GLOB_PATTERN_TOO_BIG
returned by
.I glob_compile
or
.I glob_match
indicating the compiled pattern overflowed the buffer;
.TP
GLOB_PATTERN_EMPTY
returned by
.I glob_compile
or
.I glob_match
indicating the pattern is the empty string;
.TP
GLOB_BRACKET_MISSING
returned by
.I glob_compile
or
.I glob_match
indicating that a set expression
.RI [ s ]
is missing the terminating bracket ];
.TP
GLOB_RANGE_INVERTED
returned by
.I glob_compile
or
.I glob_match
indicating a range expression in a set
is inverted, for example [z-a];
.TP
GLOB_SET_TOO_BIG
returned by
.I glob_compile
or
.I glob_match
indicating a compiled set requires more than 127 bytes
(a single character consumes 2 bytes and a range consumes 3 bytes);
.TP
GLOB_EXECUTION_ERROR
returned by
.I glob_execute
or
.I glob_match
indicating an internal error.