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/*
Crown Copyright (c) 1997
This TenDRA(r) Computer Program is subject to Copyright
owned by the United Kingdom Secretary of State for Defence
acting through the Defence Evaluation and Research Agency
(DERA). It is made available to Recipients with a
royalty-free licence for its use, reproduction, transfer
to other parties and amendment for any purpose not excluding
product development provided that any such use et cetera
shall be deemed to be acceptance of the following conditions:-
(1) Its Recipients shall ensure that this Notice is
reproduced upon any copies or amended versions of it;
(2) Any amended version of it shall be clearly marked to
show both the nature of and the organisation responsible
for the relevant amendment or amendments;
(3) Its onward transfer from a recipient to another
party shall be deemed to be that party's acceptance of
these conditions;
(4) DERA gives no warranty or assurance as to its
quality or suitability for any purpose and DERA accepts
no liability whatsoever in relation to any use to which
it may be put.
*/
#include "config.h"
#include <limits.h>
#include "c_types.h"
#include "char.h"
#include "literal.h"
/*
ASCII FLAG
This flag is true if the native codeset is ASCII. It is initially -1
indicating that the conversion tables have not been initialised.
*/
int is_ascii = -1 ;
/*
CONVERSION TABLES
These tables give the conversions of ASCII to and from the native
codeset. The ASCII to native table is deduced for the portable
codeset from the list of characters in char.h which is given in
ASCII sequence.
*/
static character to_ascii_tab [ NO_CHAR + 1 ] ;
static character from_ascii_tab [ NO_CHAR + 1 ] = {
#define NONE char_illegal
#define CHAR_DATA( A, B, C, D ) ( D ),
#include "char.h"
#undef CHAR_DATA
NONE /* dummy last element */
} ;
/*
CONVERT A CHARACTER TO ASCII
This routine converts the character c from the native codeset to
ASCII.
*/
unsigned long to_ascii
PROTO_N ( ( c, ch ) )
PROTO_T ( unsigned long c X int *ch )
{
if ( c < NO_CHAR ) {
c = ( unsigned long ) to_ascii_tab [c] ;
*ch = CHAR_ASCII ;
}
return ( c ) ;
}
/*
CONVERT A CHARACTER TO NATIVE CODESET
This routine converts the character c to the native codeset from
ASCII.
*/
unsigned long from_ascii
PROTO_N ( ( c, ch ) )
PROTO_T ( unsigned long c X int *ch )
{
if ( c < NO_CHAR ) {
c = ( unsigned long ) from_ascii_tab [c] ;
*ch = CHAR_SIMPLE ;
}
return ( c ) ;
}
/*
TRANSFORM A TABLE FROM ASCII TO NATIVE CODESET
This routine maps the look-up table p from ASCII to native codeset.
*/
void map_ascii
PROTO_N ( ( p ) )
PROTO_T ( unsigned char *p )
{
unsigned c ;
int asc = is_ascii ;
if ( asc == -1 ) {
/* Set up conversion tables */
asc = 1 ;
for ( c = 0 ; c < NO_CHAR ; c++ ) {
to_ascii_tab [c] = ( character ) c ;
}
for ( c = 0 ; c < NO_CHAR ; c++ ) {
unsigned a = ( unsigned ) from_ascii_tab [c] ;
if ( a == NONE ) a = c ;
if ( a != c ) asc = 0 ;
from_ascii_tab [c] = ( character ) a ;
to_ascii_tab [a] = ( character ) c ;
}
is_ascii = asc ;
}
if ( asc == 0 ) {
/* Map table */
unsigned char b = p [ NONE ] ;
unsigned char copy [ NO_CHAR ] ;
for ( c = 0 ; c < NO_CHAR ; c++ ) {
copy [c] = p [c] ;
p [c] = b ;
}
SET ( copy ) ;
for ( c = 0 ; c < NO_CHAR ; c++ ) {
character a = from_ascii_tab [c] ;
p [a] = copy [c] ;
}
}
return ;
}
/*
TABLE OF ALPHABETIC UNICODE CHARACTERS
This table gives the ranges of the unicode characters which are
suitable for use in an identifier name in ascending order. It is
derived from Annex E of the standard (which derives from ISO/IEC
PDTR 10176) with two misprints corrected. 0e0d should be 0e8d
and 5e76 should be fe76. Note that the upper and lower case
English alphabets have been included even though they are not
valid universal character names.
*/
static struct {
unsigned long lo ;
unsigned long hi ;
} alpha_range [] = {
/* Latin */
{ 0x0041, 0x005a }, { 0x0061, 0x007a }, { 0x00c0, 0x00d6 },
{ 0x00d8, 0x00f6 }, { 0x00f8, 0x01f5 }, { 0x01fa, 0x0217 },
{ 0x0250, 0x02a8 },
/* Greek */
{ 0x0384, 0x0384 }, { 0x0388, 0x038a }, { 0x038c, 0x038c },
{ 0x038e, 0x03a1 }, { 0x03a3, 0x03ce }, { 0x03d0, 0x03d6 },
{ 0x03da, 0x03da }, { 0x03dc, 0x03dc }, { 0x03de, 0x03de },
{ 0x03e0, 0x03e0 }, { 0x03e2, 0x03f3 },
/* Cyrilic */
{ 0x0401, 0x040d }, { 0x040f, 0x044f }, { 0x0451, 0x045c },
{ 0x045e, 0x0481 }, { 0x0490, 0x04c4 }, { 0x04c7, 0x04c8 },
{ 0x04cb, 0x04cc }, { 0x04d0, 0x04eb }, { 0x04ee, 0x04f5 },
{ 0x04f8, 0x04f9 },
/* Armenian */
{ 0x0531, 0x0556 }, { 0x0561, 0x0587 },
/* Hebrew */
{ 0x05d0, 0x05ea }, { 0x05f0, 0x05f4 },
/* Arabic */
{ 0x0621, 0x063a }, { 0x0640, 0x0652 }, { 0x0670, 0x06b7 },
{ 0x06ba, 0x06be }, { 0x06c0, 0x06ce }, { 0x06e5, 0x06e7 },
/* Devanagari */
{ 0x0905, 0x0939 }, { 0x0958, 0x0962 },
/* Bengali */
{ 0x0985, 0x098c }, { 0x098f, 0x0990 }, { 0x0993, 0x09a8 },
{ 0x09aa, 0x09b0 }, { 0x09b2, 0x09b2 }, { 0x09b6, 0x09b9 },
{ 0x09dc, 0x09dd }, { 0x09df, 0x09e1 }, { 0x09f0, 0x09f1 },
/* Gurmukhi */
{ 0x0a05, 0x0a0a }, { 0x0a0f, 0x0a10 }, { 0x0a13, 0x0a28 },
{ 0x0a2a, 0x0a30 }, { 0x0a32, 0x0a33 }, { 0x0a35, 0x0a36 },
{ 0x0a38, 0x0a39 }, { 0x0a59, 0x0a5c }, { 0x0a5e, 0x0a5e },
/* Gujarati */
{ 0x0a85, 0x0a8b }, { 0x0a8d, 0x0a8d }, { 0x0a8f, 0x0a91 },
{ 0x0a93, 0x0aa8 }, { 0x0aaa, 0x0ab0 }, { 0x0ab2, 0x0ab3 },
{ 0x0ab5, 0x0ab9 }, { 0x0ae0, 0x0ae0 },
/* Oriya */
{ 0x0b05, 0x0b0c }, { 0x0b0f, 0x0b10 }, { 0x0b13, 0x0b28 },
{ 0x0b2a, 0x0b30 }, { 0x0b32, 0x0b33 }, { 0x0b36, 0x0b39 },
{ 0x0b5c, 0x0b5d }, { 0x0b5f, 0x0b61 },
/* Tamil */
{ 0x0b85, 0x0b8a }, { 0x0b8e, 0x0b90 }, { 0x0b92, 0x0b95 },
{ 0x0b99, 0x0b9a }, { 0x0b9c, 0x0b9c }, { 0x0b9e, 0x0b9f },
{ 0x0ba3, 0x0ba4 }, { 0x0ba8, 0x0baa }, { 0x0bae, 0x0bb5 },
{ 0x0bb7, 0x0bb9 },
/* Telugu */
{ 0x0c05, 0x0c0c }, { 0x0c0e, 0x0c10 }, { 0x0c12, 0x0c28 },
{ 0x0c2a, 0x0c33 }, { 0x0c35, 0x0c39 }, { 0x0c60, 0x0c61 },
/* Kannada */
{ 0x0c85, 0x0c8c }, { 0x0c8e, 0x0c90 }, { 0x0c92, 0x0ca8 },
{ 0x0caa, 0x0cb3 }, { 0x0cb5, 0x0cb9 }, { 0x0ce0, 0x0ce1 },
/* Malayalam */
{ 0x0d05, 0x0d0c }, { 0x0d0e, 0x0d10 }, { 0x0d12, 0x0d28 },
{ 0x0d2a, 0x0d39 }, { 0x0d60, 0x0d61 },
/* Thai */
{ 0x0e01, 0x0e30 }, { 0x0e32, 0x0e33 }, { 0x0e40, 0x0e46 },
{ 0x0e4f, 0x0e5b },
/* Lao */
{ 0x0e81, 0x0e82 }, { 0x0e84, 0x0e84 }, { 0x0e87, 0x0e87 },
{ 0x0e88, 0x0e88 }, { 0x0e8a, 0x0e8a }, { 0x0e8d, 0x0e8d },
{ 0x0e94, 0x0e97 }, { 0x0e99, 0x0e9f }, { 0x0ea1, 0x0ea3 },
{ 0x0ea5, 0x0ea5 }, { 0x0ea7, 0x0ea7 }, { 0x0eaa, 0x0eaa },
{ 0x0eab, 0x0eab }, { 0x0ead, 0x0eb0 }, { 0x0eb2, 0x0eb2 },
{ 0x0eb3, 0x0eb3 }, { 0x0ebd, 0x0ebd }, { 0x0ec0, 0x0ec4 },
{ 0x0ec6, 0x0ec6 },
/* Georgian */
{ 0x10a0, 0x10c5 }, { 0x10d0, 0x10f6 },
/* Hangul */
{ 0x1100, 0x1159 }, { 0x1161, 0x11a2 }, { 0x11a8, 0x11f9 },
/* Latin (continued) */
{ 0x1e00, 0x1e9a }, { 0x1ea0, 0x1ef9 },
/* Greek (continued) */
{ 0x1f00, 0x1f15 }, { 0x1f18, 0x1f1d }, { 0x1f20, 0x1f45 },
{ 0x1f48, 0x1f4d }, { 0x1f50, 0x1f57 }, { 0x1f59, 0x1f59 },
{ 0x1f5b, 0x1f5b }, { 0x1f5d, 0x1f5d }, { 0x1f5f, 0x1f7d },
{ 0x1f80, 0x1fb4 }, { 0x1fb6, 0x1fbc }, { 0x1fc2, 0x1fc4 },
{ 0x1fc6, 0x1fcc }, { 0x1fd0, 0x1fd3 }, { 0x1fd6, 0x1fdb },
{ 0x1fe0, 0x1fec }, { 0x1ff2, 0x1ff4 }, { 0x1ff6, 0x1ffc },
/* Hiragana */
{ 0x3041, 0x3094 }, { 0x309b, 0x309e },
/* Katakana */
{ 0x30a1, 0x30fe },
/* Bopmofo */
{ 0x3105, 0x312c },
/* CJK Unified Ideographs */
#if FS_NUMBER_SUFFIX
{ 0x4e00UL, 0x9fa5UL }, { 0xf900UL, 0xfa2dUL }, { 0xfb1fUL, 0xfb36UL },
{ 0xfb38UL, 0xfb3cUL }, { 0xfb3eUL, 0xfb3eUL }, { 0xfb40UL, 0xfb41UL },
{ 0xfb42UL, 0xfb44UL }, { 0xfb46UL, 0xfbb1UL }, { 0xfbd3UL, 0xfd3fUL },
{ 0xfd50UL, 0xfd8fUL }, { 0xfd92UL, 0xfdc7UL }, { 0xfdf0UL, 0xfdfbUL },
{ 0xfe70UL, 0xfe72UL }, { 0xfe74UL, 0xfe74UL }, { 0xfe76UL, 0xfefcUL },
{ 0xff21UL, 0xff3aUL }, { 0xff41UL, 0xff5aUL }, { 0xff66UL, 0xffbeUL },
{ 0xffc2UL, 0xffc7UL }, { 0xffcaUL, 0xffcfUL }, { 0xffd2UL, 0xffd7UL },
{ 0xffdaUL, 0xffdcUL }
#else
{ 0x4e00, 0x9fa5 }, { 0xf900, 0xfa2d }, { 0xfb1f, 0xfb36 },
{ 0xfb38, 0xfb3c }, { 0xfb3e, 0xfb3e }, { 0xfb40, 0xfb41 },
{ 0xfb42, 0xfb44 }, { 0xfb46, 0xfbb1 }, { 0xfbd3, 0xfd3f },
{ 0xfd50, 0xfd8f }, { 0xfd92, 0xfdc7 }, { 0xfdf0, 0xfdfb },
{ 0xfe70, 0xfe72 }, { 0xfe74, 0xfe74 }, { 0xfe76, 0xfefc },
{ 0xff21, 0xff3a }, { 0xff41, 0xff5a }, { 0xff66, 0xffbe },
{ 0xffc2, 0xffc7 }, { 0xffca, 0xffcf }, { 0xffd2, 0xffd7 },
{ 0xffda, 0xffdc }
#endif
} ;
/*
DOES A UNICODE CHARACTER REPRESENT AN ALPHABETIC VALUE?
This routine checks whether the unicode character c represents an
alphabetic value suitable for use in an identifier name. It
operates by performing a binary chop on the table above.
*/
int unicode_alpha
PROTO_N ( ( c ) )
PROTO_T ( unsigned long c )
{
int i = 0 ;
int j = array_size ( alpha_range ) - 1 ;
do {
int k = ( i + j ) / 2 ;
if ( c < alpha_range [k].lo ) {
/* Lower half */
j = k - 1 ;
} else if ( c > alpha_range [k].hi ) {
/* Upper half */
i = k + 1 ;
} else {
/* Match found */
return ( 1 ) ;
}
} while ( i <= j ) ;
return ( 0 ) ;
}