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static char rcsid[] = "@(#)$Id: striparens.c,v 5.1 1992/10/03 22:41:36 syd Exp $";
/*******************************************************************************
* The Elm Mail System - $Revision: 5.1 $ $State: Exp $
*
* Copyright (c) 1988-1992 USENET Community Trust
* Copyright (c) 1986,1987 Dave Taylor
*******************************************************************************
* Bug reports, patches, comments, suggestions should be sent to:
*
* Syd Weinstein, Elm Coordinator
* elm@DSI.COM dsinc!elm
*
*******************************************************************************
* $Log: striparens.c,v $
* Revision 5.1 1992/10/03 22:41:36 syd
* Initial checkin as of 2.4 Release at PL0
*
*
******************************************************************************/
/**
**/
#include "headers.h"
char *strip_parens(string)
char *string;
{
/**
Remove parenthesized information from a string. More specifically,
comments as defined in RFC822 are removed. This procedure is
non-destructive - a pointer to static data is returned.
**/
static char buffer[VERY_LONG_STRING];
register char *bufp;
register int depth, l;
bufp = buffer;
depth = 0;
while (*string != '\0') {
l = len_next_part(string);
if (l == 1) {
switch ( *string ) {
case '(': /* begin comment on '(' */
++depth;
break;
case ')': /* decr nesting level on ')' */
--depth;
break;
case '\\': /* treat next char literally */
if ( *++string == '\0' ) { /* gracefully handle */
*bufp++ = '\\'; /* '\' at end of string */
--string; /* even tho it's wrong */
} else if ( depth == 0 ) {
*bufp++ = '\\';
*bufp++ = *string;
}
break;
default: /* a regular char */
if ( depth == 0 )
*bufp++ = *string;
break;
}
string++;
} else {
if (depth == 0) {
while (--l >= 0)
*bufp++ = *string++;
} else
string += l;
}
}
*bufp = '\0';
return( (char *) buffer);
}
/*
* Added by RLH. This could be combined w/ above if willing to pass
* a TRUE/FALSE for whether we are stripping or getting...
*/
char *get_parens(string)
char *string;
{
/**
Find and return parenthesized information in a string. More
specifically, comments as defined in RFC822 are retrieved.
This procedure is non-destructive - a pointer to static data
is returned.
**/
static char buffer[VERY_LONG_STRING];
register char *bufp;
register int depth, l;
bufp = buffer;
depth = 0;
while (*string != '\0') {
l = len_next_part(string);
if (l == 1) {
switch ( *string ) {
case '(': /* begin comment on '(' */
++depth;
break;
case ')': /* decr nesting level on ')' */
--depth;
break;
case '\\': /* treat next char literally */
if ( *++string == '\0' ) { /* gracefully handle */
*bufp++ = '\\'; /* '\' at end of string */
--string; /* even tho it's wrong */
} else if ( depth > 0 ) {
*bufp++ = '\\';
*bufp++ = *string;
}
break;
default: /* a regular char */
if ( depth > 0 )
*bufp++ = *string;
break;
}
string++;
} else {
if (depth > 0) {
while (--l >= 0)
*bufp++ = *string++;
} else
string += l;
}
}
*bufp = '\0';
return( (char *) buffer);
}
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