/* extract_pattern: copy a pattern string from the command buffer; return
pointer to the copy */
char *
extract_pattern(int delimiter)
{
static char *lhbuf = NULL; /* buffer */
static int lhbufsz = 0; /* buffer size */
char *nd;
int len;
for (nd = ibufp; *nd != delimiter && *nd != '\n'; nd++)
switch (*nd) {
default:
break;
case '[':
if ((nd = parse_char_class(++nd)) == NULL) {
errmsg = "unbalanced brackets ([])";
return NULL;
}
break;
case '\\':
if (*++nd == '\n') {
errmsg = "trailing backslash (\\)";
return NULL;
}
break;
}
len = nd - ibufp;
REALLOC(lhbuf, lhbufsz, len + 1, NULL);
memcpy(lhbuf, ibufp, len);
lhbuf[len] = '\0';
ibufp = nd;
return (isbinary) ? NUL_TO_NEWLINE(lhbuf, len) : lhbuf;
}
/* copy a pattern string from the command buffer; return pointer to the copy */
static char *extract_pattern( const char **ibufpp, const int delimiter )
{
static char *buf = 0;
static int bufsz = 0;
const char *nd = *ibufpp;
int len;
while( *nd != delimiter && *nd != '\n' )
{
if( *nd == '[' )
{
nd = parse_char_class( ++nd );
if( !nd ) { set_error_msg( "Unbalanced brackets ([])" ); return 0; }
}
else if( *nd == '\\' && *++nd == '\n' )
{ set_error_msg( "Trailing backslash (\\)" ); return 0; }
++nd;
}
len = nd - *ibufpp;
if( !resize_buffer( &buf, &bufsz, len + 1 ) ) return 0;
memcpy( buf, *ibufpp, len );
buf[len] = 0;
*ibufpp = nd;
if( isbinary() ) nul_to_newline( buf, len );
return buf;
}
