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