77 lines
2.0 KiB
C
77 lines
2.0 KiB
C
/* ctype.c */
|
|
|
|
/* This file contains the tables and initialization function for elvis'
|
|
* version of <ctype.h>. It should be portable.
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include "ctype.h"
|
|
|
|
void _ct_init P_((uchar *));
|
|
|
|
uchar _ct_toupper[256];
|
|
uchar _ct_tolower[256];
|
|
uchar _ct_ctypes[256];
|
|
|
|
/* This function initializes the tables used by the ctype macros. It should
|
|
* be called at the start of the program. It can be called again anytime you
|
|
* wish to change the non-standard "flipcase" list. The "flipcase" list is
|
|
* a string of characters which are taken to be lowercase/uppercase pairs.
|
|
* If you don't want to use any special flipcase characters, then pass an
|
|
* empty string.
|
|
*/
|
|
void _ct_init(flipcase)
|
|
uchar *flipcase; /* list of non-standard lower/upper letter pairs */
|
|
{
|
|
int i;
|
|
uchar *scan;
|
|
|
|
/* reset all of the tables */
|
|
for (i = 0; i < 256; i++)
|
|
{
|
|
_ct_toupper[i] = _ct_tolower[i] = i;
|
|
_ct_ctypes[i] = 0;
|
|
}
|
|
|
|
/* add the digits */
|
|
for (scan = (uchar *)"0123456789"; *scan; scan++)
|
|
{
|
|
_ct_ctypes[*scan] |= _CT_DIGIT | _CT_ALNUM;
|
|
}
|
|
|
|
/* add the whitespace */
|
|
for (scan = (uchar *)" \t\n\r\f"; *scan; scan++)
|
|
{
|
|
_ct_ctypes[*scan] |= _CT_SPACE;
|
|
}
|
|
|
|
/* add the standard ASCII letters */
|
|
for (scan = (uchar *)"aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ"; *scan; scan += 2)
|
|
{
|
|
_ct_ctypes[scan[0]] |= _CT_LOWER | _CT_ALNUM;
|
|
_ct_ctypes[scan[1]] |= _CT_UPPER | _CT_ALNUM;
|
|
_ct_toupper[scan[0]] = scan[1];
|
|
_ct_tolower[scan[1]] = scan[0];
|
|
}
|
|
|
|
/* add the flipcase letters */
|
|
for (scan = flipcase; scan[0] && scan[1]; scan += 2)
|
|
{
|
|
_ct_ctypes[scan[0]] |= _CT_LOWER | _CT_ALNUM;
|
|
_ct_ctypes[scan[1]] |= _CT_UPPER | _CT_ALNUM;
|
|
_ct_toupper[scan[0]] = scan[1];
|
|
_ct_tolower[scan[1]] = scan[0];
|
|
}
|
|
|
|
/* include '_' in the isalnum() list */
|
|
_ct_ctypes[UCHAR('_')] |= _CT_ALNUM;
|
|
|
|
/* !!! find the control characters in an ASCII-dependent way */
|
|
for (i = 0; i < ' '; i++)
|
|
{
|
|
_ct_ctypes[i] |= _CT_CNTRL;
|
|
}
|
|
_ct_ctypes[127] |= _CT_CNTRL;
|
|
_ct_ctypes[255] |= _CT_CNTRL;
|
|
}
|