d4f014461b
Add a 'bootstrap' target which *must* be run before building the new version, since the new scanner relies on the current version of flex to build itself otherwise.
150 lines
3.6 KiB
C
150 lines
3.6 KiB
C
/* ccl - routines for character classes */
|
|
|
|
/*-
|
|
* Copyright (c) 1990 The Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Vern Paxson.
|
|
*
|
|
* The United States Government has rights in this work pursuant
|
|
* to contract no. DE-AC03-76SF00098 between the United States
|
|
* Department of Energy and the University of California.
|
|
*
|
|
* Redistribution and use in source and binary forms are permitted provided
|
|
* that: (1) source distributions retain this entire copyright notice and
|
|
* comment, and (2) distributions including binaries display the following
|
|
* acknowledgement: ``This product includes software developed by the
|
|
* University of California, Berkeley and its contributors'' in the
|
|
* documentation or other materials provided with the distribution and in
|
|
* all advertising materials mentioning features or use of this software.
|
|
* Neither the name of the University nor the names of its contributors may
|
|
* be used to endorse or promote products derived from this software without
|
|
* specific prior written permission.
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
|
*/
|
|
|
|
/* $Header: /home/daffy/u0/vern/flex/RCS/ccl.c,v 2.9 93/09/16 20:32:14 vern Exp $ */
|
|
|
|
#include "flexdef.h"
|
|
|
|
/* ccladd - add a single character to a ccl */
|
|
|
|
void ccladd( cclp, ch )
|
|
int cclp;
|
|
int ch;
|
|
{
|
|
int ind, len, newpos, i;
|
|
|
|
check_char( ch );
|
|
|
|
len = ccllen[cclp];
|
|
ind = cclmap[cclp];
|
|
|
|
/* check to see if the character is already in the ccl */
|
|
|
|
for ( i = 0; i < len; ++i )
|
|
if ( ccltbl[ind + i] == ch )
|
|
return;
|
|
|
|
newpos = ind + len;
|
|
|
|
if ( newpos >= current_max_ccl_tbl_size )
|
|
{
|
|
current_max_ccl_tbl_size += MAX_CCL_TBL_SIZE_INCREMENT;
|
|
|
|
++num_reallocs;
|
|
|
|
ccltbl = reallocate_Character_array( ccltbl,
|
|
current_max_ccl_tbl_size );
|
|
}
|
|
|
|
ccllen[cclp] = len + 1;
|
|
ccltbl[newpos] = ch;
|
|
}
|
|
|
|
|
|
/* cclinit - return an empty ccl */
|
|
|
|
int cclinit()
|
|
{
|
|
if ( ++lastccl >= current_maxccls )
|
|
{
|
|
current_maxccls += MAX_CCLS_INCREMENT;
|
|
|
|
++num_reallocs;
|
|
|
|
cclmap = reallocate_integer_array( cclmap, current_maxccls );
|
|
ccllen = reallocate_integer_array( ccllen, current_maxccls );
|
|
cclng = reallocate_integer_array( cclng, current_maxccls );
|
|
}
|
|
|
|
if ( lastccl == 1 )
|
|
/* we're making the first ccl */
|
|
cclmap[lastccl] = 0;
|
|
|
|
else
|
|
/* The new pointer is just past the end of the last ccl.
|
|
* Since the cclmap points to the \first/ character of a
|
|
* ccl, adding the length of the ccl to the cclmap pointer
|
|
* will produce a cursor to the first free space.
|
|
*/
|
|
cclmap[lastccl] = cclmap[lastccl - 1] + ccllen[lastccl - 1];
|
|
|
|
ccllen[lastccl] = 0;
|
|
cclng[lastccl] = 0; /* ccl's start out life un-negated */
|
|
|
|
return lastccl;
|
|
}
|
|
|
|
|
|
/* cclnegate - negate the given ccl */
|
|
|
|
void cclnegate( cclp )
|
|
int cclp;
|
|
{
|
|
cclng[cclp] = 1;
|
|
}
|
|
|
|
|
|
/* list_character_set - list the members of a set of characters in CCL form
|
|
*
|
|
* Writes to the given file a character-class representation of those
|
|
* characters present in the given CCL. A character is present if it
|
|
* has a non-zero value in the cset array.
|
|
*/
|
|
|
|
void list_character_set( file, cset )
|
|
FILE *file;
|
|
int cset[];
|
|
{
|
|
register int i;
|
|
|
|
putc( '[', file );
|
|
|
|
for ( i = 0; i < csize; ++i )
|
|
{
|
|
if ( cset[i] )
|
|
{
|
|
register int start_char = i;
|
|
|
|
putc( ' ', file );
|
|
|
|
fputs( readable_form( i ), file );
|
|
|
|
while ( ++i < csize && cset[i] )
|
|
;
|
|
|
|
if ( i - 1 > start_char )
|
|
/* this was a run */
|
|
fprintf( file, "-%s", readable_form( i - 1 ) );
|
|
|
|
putc( ' ', file );
|
|
}
|
|
}
|
|
|
|
putc( ']', file );
|
|
}
|