NAME

regcmp − regular expression compile

SYNOPSIS

regcmp [ − ] files

DESCRIPTION

Regcmp, in most cases, precludes the need for calling regcmp(3X) from C programs. This saves on both execution time and program size. The command regcmp compiles the regular expressions in file and places the output in file.i. If the − option is used, the output will be placed in file.c. The format of entries in file is a name (C variable) followed by one or more blanks followed by a regular expression enclosed in double quotes.  The output of regcmp is C source code.  Compiled regular expressions are represented as extern char vectors.  File.i files may thus be included into C programs, or file.c files may be compiled and later loaded.  In the C program which uses the regcmp output, regex(abc,line) will apply the regular expression named abc to line. Diagnostics are self-explanatory.

EXAMPLE

name "([A−Za−z][A−Za−z0−9_]∗)$0"

telno "\({0,1}([2−9][01][1−9])$0\){0,1} ∗"
"([2−9][0−9]{2})$1[ −]{0,1}"
"([0−9]{4})$2"

In the C program that uses the regcmp output,

regex(telno, line, area, exch, rest)

will apply the regular expression named telno to line. 

SEE ALSO

regcmp(3X). 

Version 2.1  —  January 02, 1985