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Add support for "\a" and "\v" to regex and command line args (#44)

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Support POSIX-specified C-style escape sequences "\a" (alarm)
and "\v" (vertical tab) in command line arguments and regular
expressions, further to the support for them in strings added on
Apr 9, 1989. These now no longer match as literal "a" and "v"
characters (as they don't on gawk and mawk).

IOW, lex.c already supported these (lines 390-391 as of 4e343460);
the support needed to be added to b.c and tran.c.

Relevant POSIX reference:
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/awk.html#tag_20_06_13_04
This commit is contained in:
Martijn Dekker 2019-07-26 10:46:58 +02:00 committed by Arnold Robbins
parent 4e34346094
commit 5b602ca8a2
4 changed files with 14 additions and 1 deletions
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7
FIXES
View File

@ -25,6 +25,13 @@ THIS SOFTWARE.
This file lists all bug fixes, changes, etc., made since the AWK book
was sent to the printers in August, 1987.
July 26, 2019:
Support POSIX-specified C-style escape sequences "\a" (alarm)
and "\v" (vertical tab) in command line arguments and regular
expressions, further to the support for them in strings added on
Apr 9, 1989. These now no longer match as literal "a" and "v"
characters (as they don't on other awk implementations).
July 17, 2019:
Pull in a number of code cleanups and minor fixes from
Warner Losh's bsd-ota branch. The only user visible change

4
b.c
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@ -279,6 +279,10 @@ int quoted(uschar **pp) /* pick up next thing after a \\ */
c = '\r';
else if (c == 'b')
c = '\b';
else if (c == 'v')
c = '\v';
else if (c == 'a')
c = '\a';
else if (c == '\\')
c = '\\';
else if (c == 'x') { /* hexadecimal goo follows */

2
main.c
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@ -22,7 +22,7 @@ ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
THIS SOFTWARE.
****************************************************************/
const char *version = "version 20190717";
const char *version = "version 20190726";
#define DEBUG
#include <stdio.h>

2
tran.c
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@ -543,6 +543,8 @@ char *qstring(const char *is, int delim) /* collect string up to next delim */
case 'b': *bp++ = '\b'; break;
case 'f': *bp++ = '\f'; break;
case 'r': *bp++ = '\r'; break;
case 'v': *bp++ = '\v'; break;
case 'a': *bp++ = '\a'; break;
default:
if (!isdigit(c)) {
*bp++ = c;