/* ******************************************************************************* * * Copyright (C) 1998-1999, International Business Machines * Corporation and others. All Rights Reserved. * ******************************************************************************* * * ucnv_err.c * Implements error behaviour functions called by T_UConverter_{from,to}Unicode * * * Change history: * * 06/29/2000 helena Major rewrite of the callback APIs. */ #include "ucmp8.h" #include "ucmp16.h" #include "unicode/ucnv_err.h" #include "unicode/ucnv_cb.h" #include "ucnv_cnv.h" #include "cmemory.h" #include "unicode/ucnv.h" #define VALUE_STRING_LENGTH 32 /*Magic # 32 = 4(number of char in value string) * 8(max number of bytes per char for any converter) */ #define UNICODE_PERCENT_SIGN_CODEPOINT 0x0025 #define UNICODE_U_CODEPOINT 0x0055 #define UNICODE_X_CODEPOINT 0x0058 #define ToOffset(a) a<=9?(0x0030+a):(0x0030+a+7) UBool CONVERSION_U_SUCCESS (UErrorCode err) { if ((err == U_INVALID_CHAR_FOUND) || (err == U_ILLEGAL_CHAR_FOUND)) return FALSE; else return TRUE; } /*Takes a int32_t and fills in a UChar* string with that number "radix"-based * and padded with "pad" zeroes */ static void itou (UChar * buffer, uint32_t i, uint32_t radix, int32_t pad) { int32_t length = 0; int32_t num = 0; int8_t digit; int32_t j; UChar temp; while (i >= radix) { num = i / radix; digit = (int8_t) (i - num * radix); buffer[length++] = (UChar) (ToOffset (digit)); i = num; } buffer[length] = (UChar) (ToOffset (i)); while (length < pad) buffer[++length] = (UChar) 0x0030; /*zero padding */ buffer[length--] = (UChar) 0x0000; /*Reverses the string */ for (j = 0; j < (pad / 2); j++) { temp = buffer[length - j]; buffer[length - j] = buffer[j]; buffer[j] = temp; } return; } /*Function Pointer STOPS at the ILLEGAL_SEQUENCE */ void UCNV_FROM_U_CALLBACK_STOP ( void *context, UConverterFromUnicodeArgs *fromUArgs, const UChar* codeUnits, int32_t length, UChar32 codePoint, UConverterCallbackReason reason, UErrorCode * err) { /* the caller must have set the error code accordingly */ return; } /*Function Pointer STOPS at the ILLEGAL_SEQUENCE */ void UCNV_TO_U_CALLBACK_STOP ( void *context, UConverterToUnicodeArgs *toUArgs, const char* codePoints, int32_t length, UConverterCallbackReason reason, UErrorCode * err) { /* the caller must have set the error code accordingly */ return; } void UCNV_FROM_U_CALLBACK_SKIP ( void *context, UConverterFromUnicodeArgs *fromUArgs, const UChar* codeUnits, int32_t length, UChar32 codePoint, UConverterCallbackReason reason, UErrorCode * err) { if (reason <= UCNV_IRREGULAR) { *err = U_ZERO_ERROR; } } void UCNV_FROM_U_CALLBACK_SUBSTITUTE ( void *context, UConverterFromUnicodeArgs *fromArgs, const UChar* codeUnits, int32_t length, UChar32 codePoint, UConverterCallbackReason reason, UErrorCode * err) { if (reason > UCNV_IRREGULAR) { return; } *err = U_ZERO_ERROR; ucnv_cbFromUWriteSub(fromArgs, 0, err); } /*uses itou to get a unicode escape sequence of the offensive sequence, *uses a clean copy (resetted) of the converter, to convert that unicode *escape sequence to the target codepage (if conversion failure happens then *we revert to substituting with subchar) */ void UCNV_FROM_U_CALLBACK_ESCAPE ( void *context, UConverterFromUnicodeArgs *fromArgs, const UChar *codeUnits, int32_t length, UChar32 codePoint, UConverterCallbackReason reason, UErrorCode * err) { UChar valueString[VALUE_STRING_LENGTH]; int32_t valueStringLength = 0; int32_t i = 0; const UChar *myValueSource = NULL; UErrorCode err2 = U_ZERO_ERROR; UConverterFromUCallback original = NULL; void *originalContext; UConverterFromUCallback ignoredCallback = NULL; void *ignoredContext; if (reason > UCNV_IRREGULAR) { return; } ucnv_setFromUCallBack (fromArgs->converter, (UConverterFromUCallback) UCNV_FROM_U_CALLBACK_SUBSTITUTE, NULL, /* To Do for HSYS: context is null? */ &original, &originalContext, &err2); if (U_FAILURE (err2)) { *err = err2; return; } /* * ### TODO: * This should actually really work with the codePoint, not with the codeUnits; * how do we represent a code point > 0xffff? It should be one single escape, not * two for a surrogate pair! */ while (i < length) { valueString[valueStringLength++] = (UChar) UNICODE_PERCENT_SIGN_CODEPOINT; /* adding % */ valueString[valueStringLength++] = (UChar) UNICODE_U_CODEPOINT; /* adding U */ itou (valueString + valueStringLength, codeUnits[i++], 16, 4); valueStringLength += 4; } myValueSource = valueString; /* reset the error */ *err = U_ZERO_ERROR; ucnv_cbFromUWriteUChars(fromArgs, &myValueSource, myValueSource+valueStringLength, 0, err); ucnv_setFromUCallBack (fromArgs->converter, original, originalContext, &ignoredCallback, &ignoredContext, &err2); if (U_FAILURE (err2)) { *err = err2; return; } return; } void UCNV_TO_U_CALLBACK_SKIP ( void *context, UConverterToUnicodeArgs *toArgs, const char* codeUnits, int32_t length, UConverterCallbackReason reason, UErrorCode * err) { if (reason <= UCNV_IRREGULAR) { *err = U_ZERO_ERROR; } } void UCNV_TO_U_CALLBACK_SUBSTITUTE ( void *context, UConverterToUnicodeArgs *toArgs, const char* codeUnits, int32_t length, UConverterCallbackReason reason, UErrorCode * err) { if (reason > UCNV_IRREGULAR) { return; } *err = U_ZERO_ERROR; ucnv_cbToUWriteSub(toArgs,0,err); return; } /*uses itou to get a unicode escape sequence of the offensive sequence, *and uses that as the substitution sequence */ void UCNV_TO_U_CALLBACK_ESCAPE ( void *context, UConverterToUnicodeArgs *toArgs, const char* codeUnits, int32_t length, UConverterCallbackReason reason, UErrorCode * err) { UChar uniValueString[VALUE_STRING_LENGTH]; int32_t valueStringLength = 0; int32_t i = 0; if (reason > UCNV_IRREGULAR) { return; } /* ### TODO: * This should use the new ucnv_cbWrite...() functions instead of doing * "tricks" as before we had a good callback API! * (Actually, this function is not all that bad.) */ while (i < length) { uniValueString[valueStringLength++] = (UChar) UNICODE_PERCENT_SIGN_CODEPOINT; /* adding % */ uniValueString[valueStringLength++] = (UChar) UNICODE_X_CODEPOINT; /* adding X */ itou (uniValueString + valueStringLength, (uint8_t) codeUnits[i++], 16, 2); valueStringLength += 2; } /* reset the error */ *err = U_ZERO_ERROR; ucnv_cbToUWriteUChars(toArgs, uniValueString, valueStringLength, 0, err); return; }