585 lines
17 KiB
C
585 lines
17 KiB
C
/*
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*******************************************************************************
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*
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* Copyright (C) 1999-2010, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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* file name: uinvchar.c
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* encoding: US-ASCII
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* tab size: 8 (not used)
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* indentation:2
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*
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* created on: 2004sep14
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* created by: Markus W. Scherer
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*
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* Functions for handling invariant characters, moved here from putil.c
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* for better modularization.
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*/
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#include "unicode/utypes.h"
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#include "unicode/ustring.h"
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#include "udataswp.h"
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#include "cstring.h"
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#include "cmemory.h"
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#include "uassert.h"
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#include "uinvchar.h"
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/* invariant-character handling --------------------------------------------- */
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/*
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* These maps for ASCII to/from EBCDIC map invariant characters (see utypes.h)
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* appropriately for most EBCDIC codepages.
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*
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* They currently also map most other ASCII graphic characters,
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* appropriately for codepages 37 and 1047.
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* Exceptions: The characters for []^ have different codes in 37 & 1047.
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* Both versions are mapped to ASCII.
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*
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* ASCII 37 1047
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* [ 5B BA AD
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* ] 5D BB BD
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* ^ 5E B0 5F
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*
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* There are no mappings for variant characters from Unicode to EBCDIC.
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*
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* Currently, C0 control codes are also included in these maps.
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* Exceptions: S/390 Open Edition swaps LF and NEL codes compared with other
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* EBCDIC platforms; both codes (15 and 25) are mapped to ASCII LF (0A),
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* but there is no mapping for ASCII LF back to EBCDIC.
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*
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* ASCII EBCDIC S/390-OE
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* LF 0A 25 15
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* NEL 85 15 25
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*
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* The maps below explicitly exclude the variant
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* control and graphical characters that are in ASCII-based
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* codepages at 0x80 and above.
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* "No mapping" is expressed by mapping to a 00 byte.
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*
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* These tables do not establish a converter or a codepage.
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*/
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static const uint8_t asciiFromEbcdic[256]={
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0x00, 0x01, 0x02, 0x03, 0x00, 0x09, 0x00, 0x7f, 0x00, 0x00, 0x00, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
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0x10, 0x11, 0x12, 0x13, 0x00, 0x0a, 0x08, 0x00, 0x18, 0x19, 0x00, 0x00, 0x1c, 0x1d, 0x1e, 0x1f,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x0a, 0x17, 0x1b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x06, 0x07,
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0x00, 0x00, 0x16, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x14, 0x15, 0x00, 0x1a,
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0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2e, 0x3c, 0x28, 0x2b, 0x7c,
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0x26, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x21, 0x24, 0x2a, 0x29, 0x3b, 0x5e,
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0x2d, 0x2f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2c, 0x25, 0x5f, 0x3e, 0x3f,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x60, 0x3a, 0x23, 0x40, 0x27, 0x3d, 0x22,
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0x00, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x7e, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x00, 0x00, 0x00, 0x5b, 0x00, 0x00,
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0x5e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x5b, 0x5d, 0x00, 0x5d, 0x00, 0x00,
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0x7b, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x7d, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x5c, 0x00, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
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};
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static const uint8_t ebcdicFromAscii[256]={
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0x00, 0x01, 0x02, 0x03, 0x37, 0x2d, 0x2e, 0x2f, 0x16, 0x05, 0x00, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
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0x10, 0x11, 0x12, 0x13, 0x3c, 0x3d, 0x32, 0x26, 0x18, 0x19, 0x3f, 0x27, 0x1c, 0x1d, 0x1e, 0x1f,
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0x40, 0x00, 0x7f, 0x00, 0x00, 0x6c, 0x50, 0x7d, 0x4d, 0x5d, 0x5c, 0x4e, 0x6b, 0x60, 0x4b, 0x61,
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0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0x7a, 0x5e, 0x4c, 0x7e, 0x6e, 0x6f,
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0x00, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6,
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0xd7, 0xd8, 0xd9, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0x00, 0x00, 0x00, 0x00, 0x6d,
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0x00, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96,
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0x97, 0x98, 0x99, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0x00, 0x00, 0x00, 0x00, 0x07,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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};
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/*
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* Bit sets indicating which characters of the ASCII repertoire
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* (by ASCII/Unicode code) are "invariant".
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* See utypes.h for more details.
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*
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* As invariant are considered the characters of the ASCII repertoire except
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* for the following:
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* 21 '!' <exclamation mark>
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* 23 '#' <number sign>
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* 24 '$' <dollar sign>
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*
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* 40 '@' <commercial at>
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*
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* 5b '[' <left bracket>
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* 5c '\' <backslash>
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* 5d ']' <right bracket>
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* 5e '^' <circumflex>
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*
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* 60 '`' <grave accent>
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*
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* 7b '{' <left brace>
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* 7c '|' <vertical line>
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* 7d '}' <right brace>
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* 7e '~' <tilde>
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*/
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static const uint32_t invariantChars[4]={
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0xfffffbff, /* 00..1f but not 0a */
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0xffffffe5, /* 20..3f but not 21 23 24 */
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0x87fffffe, /* 40..5f but not 40 5b..5e */
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0x87fffffe /* 60..7f but not 60 7b..7e */
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};
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/*
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* test unsigned types (or values known to be non-negative) for invariant characters,
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* tests ASCII-family character values
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*/
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#define UCHAR_IS_INVARIANT(c) (((c)<=0x7f) && (invariantChars[(c)>>5]&((uint32_t)1<<((c)&0x1f)))!=0)
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/* test signed types for invariant characters, adds test for positive values */
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#define SCHAR_IS_INVARIANT(c) ((0<=(c)) && UCHAR_IS_INVARIANT(c))
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#if U_CHARSET_FAMILY==U_ASCII_FAMILY
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#define CHAR_TO_UCHAR(c) c
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#define UCHAR_TO_CHAR(c) c
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#elif U_CHARSET_FAMILY==U_EBCDIC_FAMILY
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#define CHAR_TO_UCHAR(u) asciiFromEbcdic[u]
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#define UCHAR_TO_CHAR(u) ebcdicFromAscii[u]
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#else
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# error U_CHARSET_FAMILY is not valid
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#endif
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U_CAPI void U_EXPORT2
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u_charsToUChars(const char *cs, UChar *us, int32_t length) {
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UChar u;
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uint8_t c;
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/*
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* Allow the entire ASCII repertoire to be mapped _to_ Unicode.
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* For EBCDIC systems, this works for characters with codes from
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* codepages 37 and 1047 or compatible.
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*/
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while(length>0) {
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c=(uint8_t)(*cs++);
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u=(UChar)CHAR_TO_UCHAR(c);
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U_ASSERT((u!=0 || c==0)); /* only invariant chars converted? */
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*us++=u;
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--length;
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}
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}
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U_CAPI void U_EXPORT2
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u_UCharsToChars(const UChar *us, char *cs, int32_t length) {
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UChar u;
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while(length>0) {
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u=*us++;
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if(!UCHAR_IS_INVARIANT(u)) {
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U_ASSERT(FALSE); /* Variant characters were used. These are not portable in ICU. */
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u=0;
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}
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*cs++=(char)UCHAR_TO_CHAR(u);
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--length;
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}
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}
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U_CAPI UBool U_EXPORT2
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uprv_isInvariantString(const char *s, int32_t length) {
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uint8_t c;
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for(;;) {
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if(length<0) {
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/* NUL-terminated */
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c=(uint8_t)*s++;
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if(c==0) {
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break;
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}
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} else {
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/* count length */
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if(length==0) {
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break;
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}
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--length;
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c=(uint8_t)*s++;
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if(c==0) {
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continue; /* NUL is invariant */
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}
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}
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/* c!=0 now, one branch below checks c==0 for variant characters */
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/*
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* no assertions here because these functions are legitimately called
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* for strings with variant characters
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*/
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#if U_CHARSET_FAMILY==U_ASCII_FAMILY
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if(!UCHAR_IS_INVARIANT(c)) {
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return FALSE; /* found a variant char */
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}
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#elif U_CHARSET_FAMILY==U_EBCDIC_FAMILY
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c=CHAR_TO_UCHAR(c);
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if(c==0 || !UCHAR_IS_INVARIANT(c)) {
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return FALSE; /* found a variant char */
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}
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#else
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# error U_CHARSET_FAMILY is not valid
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#endif
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}
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return TRUE;
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}
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U_CAPI UBool U_EXPORT2
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uprv_isInvariantUString(const UChar *s, int32_t length) {
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UChar c;
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for(;;) {
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if(length<0) {
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/* NUL-terminated */
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c=*s++;
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if(c==0) {
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break;
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}
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} else {
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/* count length */
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if(length==0) {
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break;
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}
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--length;
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c=*s++;
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}
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/*
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* no assertions here because these functions are legitimately called
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* for strings with variant characters
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*/
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if(!UCHAR_IS_INVARIANT(c)) {
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return FALSE; /* found a variant char */
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}
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}
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return TRUE;
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}
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/* UDataSwapFn implementations used in udataswp.c ------- */
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/* convert ASCII to EBCDIC and verify that all characters are invariant */
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U_CAPI int32_t U_EXPORT2
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uprv_ebcdicFromAscii(const UDataSwapper *ds,
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const void *inData, int32_t length, void *outData,
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UErrorCode *pErrorCode) {
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const uint8_t *s;
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uint8_t *t;
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uint8_t c;
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int32_t count;
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if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
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return 0;
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}
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if(ds==NULL || inData==NULL || length<0 || (length>0 && outData==NULL)) {
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*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
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return 0;
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}
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/* setup and swapping */
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s=(const uint8_t *)inData;
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t=(uint8_t *)outData;
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count=length;
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while(count>0) {
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c=*s++;
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if(!UCHAR_IS_INVARIANT(c)) {
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udata_printError(ds, "uprv_ebcdicFromAscii() string[%d] contains a variant character in position %d\n",
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length, length-count);
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*pErrorCode=U_INVALID_CHAR_FOUND;
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return 0;
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}
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*t++=ebcdicFromAscii[c];
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--count;
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}
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return length;
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}
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/* this function only checks and copies ASCII strings without conversion */
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U_CFUNC int32_t
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uprv_copyAscii(const UDataSwapper *ds,
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const void *inData, int32_t length, void *outData,
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UErrorCode *pErrorCode) {
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const uint8_t *s;
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uint8_t c;
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int32_t count;
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if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
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return 0;
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}
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if(ds==NULL || inData==NULL || length<0 || (length>0 && outData==NULL)) {
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*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
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return 0;
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}
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/* setup and checking */
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s=(const uint8_t *)inData;
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count=length;
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while(count>0) {
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c=*s++;
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if(!UCHAR_IS_INVARIANT(c)) {
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udata_printError(ds, "uprv_copyFromAscii() string[%d] contains a variant character in position %d\n",
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length, length-count);
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*pErrorCode=U_INVALID_CHAR_FOUND;
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return 0;
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}
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--count;
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}
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if(length>0 && inData!=outData) {
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uprv_memcpy(outData, inData, length);
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}
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return length;
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}
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/* convert EBCDIC to ASCII and verify that all characters are invariant */
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U_CFUNC int32_t
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uprv_asciiFromEbcdic(const UDataSwapper *ds,
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const void *inData, int32_t length, void *outData,
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UErrorCode *pErrorCode) {
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const uint8_t *s;
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uint8_t *t;
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uint8_t c;
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int32_t count;
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if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
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return 0;
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}
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if(ds==NULL || inData==NULL || length<0 || (length>0 && outData==NULL)) {
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*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
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return 0;
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}
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/* setup and swapping */
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s=(const uint8_t *)inData;
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t=(uint8_t *)outData;
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count=length;
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while(count>0) {
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c=*s++;
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if(c!=0 && ((c=asciiFromEbcdic[c])==0 || !UCHAR_IS_INVARIANT(c))) {
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udata_printError(ds, "uprv_asciiFromEbcdic() string[%d] contains a variant character in position %d\n",
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length, length-count);
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*pErrorCode=U_INVALID_CHAR_FOUND;
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return 0;
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}
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*t++=c;
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--count;
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}
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return length;
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}
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/* this function only checks and copies EBCDIC strings without conversion */
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U_CFUNC int32_t
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uprv_copyEbcdic(const UDataSwapper *ds,
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const void *inData, int32_t length, void *outData,
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UErrorCode *pErrorCode) {
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const uint8_t *s;
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uint8_t c;
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int32_t count;
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if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
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return 0;
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}
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if(ds==NULL || inData==NULL || length<0 || (length>0 && outData==NULL)) {
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*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
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return 0;
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}
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/* setup and checking */
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s=(const uint8_t *)inData;
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count=length;
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while(count>0) {
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c=*s++;
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if(c!=0 && ((c=asciiFromEbcdic[c])==0 || !UCHAR_IS_INVARIANT(c))) {
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udata_printError(ds, "uprv_copyEbcdic() string[%] contains a variant character in position %d\n",
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length, length-count);
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*pErrorCode=U_INVALID_CHAR_FOUND;
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return 0;
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}
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--count;
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}
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if(length>0 && inData!=outData) {
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uprv_memcpy(outData, inData, length);
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}
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return length;
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}
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/* compare invariant strings; variant characters compare less than others and unlike each other */
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U_CFUNC int32_t
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uprv_compareInvAscii(const UDataSwapper *ds,
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const char *outString, int32_t outLength,
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const UChar *localString, int32_t localLength) {
|
|
int32_t minLength;
|
|
UChar32 c1, c2;
|
|
uint8_t c;
|
|
|
|
if(outString==NULL || outLength<-1 || localString==NULL || localLength<-1) {
|
|
return 0;
|
|
}
|
|
|
|
if(outLength<0) {
|
|
outLength=(int32_t)uprv_strlen(outString);
|
|
}
|
|
if(localLength<0) {
|
|
localLength=u_strlen(localString);
|
|
}
|
|
|
|
minLength= outLength<localLength ? outLength : localLength;
|
|
|
|
while(minLength>0) {
|
|
c=(uint8_t)*outString++;
|
|
if(UCHAR_IS_INVARIANT(c)) {
|
|
c1=c;
|
|
} else {
|
|
c1=-1;
|
|
}
|
|
|
|
c2=*localString++;
|
|
if(!UCHAR_IS_INVARIANT(c2)) {
|
|
c2=-2;
|
|
}
|
|
|
|
if((c1-=c2)!=0) {
|
|
return c1;
|
|
}
|
|
|
|
--minLength;
|
|
}
|
|
|
|
/* strings start with same prefix, compare lengths */
|
|
return outLength-localLength;
|
|
}
|
|
|
|
U_CFUNC int32_t
|
|
uprv_compareInvEbcdic(const UDataSwapper *ds,
|
|
const char *outString, int32_t outLength,
|
|
const UChar *localString, int32_t localLength) {
|
|
int32_t minLength;
|
|
UChar32 c1, c2;
|
|
uint8_t c;
|
|
|
|
if(outString==NULL || outLength<-1 || localString==NULL || localLength<-1) {
|
|
return 0;
|
|
}
|
|
|
|
if(outLength<0) {
|
|
outLength=(int32_t)uprv_strlen(outString);
|
|
}
|
|
if(localLength<0) {
|
|
localLength=u_strlen(localString);
|
|
}
|
|
|
|
minLength= outLength<localLength ? outLength : localLength;
|
|
|
|
while(minLength>0) {
|
|
c=(uint8_t)*outString++;
|
|
if(c==0) {
|
|
c1=0;
|
|
} else if((c1=asciiFromEbcdic[c])!=0 && UCHAR_IS_INVARIANT(c1)) {
|
|
/* c1 is set */
|
|
} else {
|
|
c1=-1;
|
|
}
|
|
|
|
c2=*localString++;
|
|
if(!UCHAR_IS_INVARIANT(c2)) {
|
|
c2=-2;
|
|
}
|
|
|
|
if((c1-=c2)!=0) {
|
|
return c1;
|
|
}
|
|
|
|
--minLength;
|
|
}
|
|
|
|
/* strings start with same prefix, compare lengths */
|
|
return outLength-localLength;
|
|
}
|
|
|
|
U_CAPI int32_t U_EXPORT2
|
|
uprv_compareInvEbcdicAsAscii(const char *s1, const char *s2) {
|
|
int32_t c1, c2;
|
|
|
|
for(;; ++s1, ++s2) {
|
|
c1=(uint8_t)*s1;
|
|
c2=(uint8_t)*s2;
|
|
if(c1!=c2) {
|
|
if(c1!=0 && ((c1=asciiFromEbcdic[c1])==0 || !UCHAR_IS_INVARIANT(c1))) {
|
|
c1=-(int32_t)(uint8_t)*s1;
|
|
}
|
|
if(c2!=0 && ((c2=asciiFromEbcdic[c2])==0 || !UCHAR_IS_INVARIANT(c2))) {
|
|
c2=-(int32_t)(uint8_t)*s2;
|
|
}
|
|
return c1-c2;
|
|
} else if(c1==0) {
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
U_INTERNAL uint8_t* U_EXPORT2
|
|
uprv_aestrncpy(uint8_t *dst, const uint8_t *src, int32_t n)
|
|
{
|
|
uint8_t *orig_dst = dst;
|
|
|
|
if(n==-1) {
|
|
n = uprv_strlen((const char*)src)+1; /* copy NUL */
|
|
}
|
|
/* copy non-null */
|
|
while(*src && n>0) {
|
|
*(dst++) = asciiFromEbcdic[*(src++)];
|
|
n--;
|
|
}
|
|
/* pad */
|
|
while(n>0) {
|
|
*(dst++) = 0;
|
|
n--;
|
|
}
|
|
return orig_dst;
|
|
}
|
|
|
|
U_INTERNAL uint8_t* U_EXPORT2
|
|
uprv_eastrncpy(uint8_t *dst, const uint8_t *src, int32_t n)
|
|
{
|
|
uint8_t *orig_dst = dst;
|
|
|
|
if(n==-1) {
|
|
n = uprv_strlen((const char*)src)+1; /* copy NUL */
|
|
}
|
|
/* copy non-null */
|
|
while(*src && n>0) {
|
|
char ch = ebcdicFromAscii[*(src++)];
|
|
if(ch == 0) {
|
|
ch = ebcdicFromAscii[0x3f]; /* questionmark (subchar) */
|
|
}
|
|
*(dst++) = ch;
|
|
n--;
|
|
}
|
|
/* pad */
|
|
while(n>0) {
|
|
*(dst++) = 0;
|
|
n--;
|
|
}
|
|
return orig_dst;
|
|
}
|
|
|