195 lines
4.6 KiB
C
195 lines
4.6 KiB
C
/*
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******************************************************************************
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*
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* Copyright (C) 1998-2003, 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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*
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* File ufmt_cmn.c
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*
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* Modification History:
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*
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* Date Name Description
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* 12/02/98 stephen Creation.
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* 03/12/99 stephen Modified for new C API.
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* 03/15/99 stephen Added defaultCPToUnicode, unicodeToDefaultCP
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* 07/19/99 stephen Fixed bug in defaultCPToUnicode
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******************************************************************************
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*/
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#include "cstring.h"
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#include "cmemory.h"
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#include "ufmt_cmn.h"
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#include "unicode/uchar.h"
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#include "unicode/ucnv.h"
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#include "ustr_imp.h"
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#define DIGIT_0 0x0030
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#define DIGIT_9 0x0039
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#define LOWERCASE_A 0x0061
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#define UPPERCASE_A 0x0041
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#define LOWERCASE_Z 0x007A
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#define UPPERCASE_Z 0x005A
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int
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ufmt_digitvalue(UChar c)
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{
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if( ((c>=DIGIT_0)&&(c<=DIGIT_9)) ||
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((c>=LOWERCASE_A)&&(c<=LOWERCASE_Z)) ||
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((c>=UPPERCASE_A)&&(c<=UPPERCASE_Z)) )
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{
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return c - 0x0030 - (c >= 0x0041 ? (c >= 0x0061 ? 39 : 7) : 0);
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}
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else
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{
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return -1;
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}
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}
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UBool
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ufmt_isdigit(UChar c,
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int32_t radix)
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{
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int digitVal = ufmt_digitvalue(c);
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return (UBool)(digitVal < radix && digitVal >= 0);
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}
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#define TO_UC_DIGIT(a) a <= 9 ? (0x0030 + a) : (0x0030 + a + 7)
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#define TO_LC_DIGIT(a) a <= 9 ? (0x0030 + a) : (0x0030 + a + 39)
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void
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ufmt_64tou(UChar *buffer,
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int32_t *len,
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uint64_t value,
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uint8_t radix,
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UBool uselower,
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int32_t minDigits)
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{
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int32_t length = 0;
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uint32_t digit;
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UChar *left, *right, temp;
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do {
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digit = (uint32_t)(value % radix);
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value = value / radix;
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buffer[length++] = (UChar)(uselower ? TO_LC_DIGIT(digit)
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: TO_UC_DIGIT(digit));
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} while(value);
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/* pad with zeroes to make it minDigits long */
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if(minDigits != -1 && length < minDigits) {
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while(length < minDigits && length < *len)
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buffer[length++] = 0x0030; /*zero padding */
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}
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/* reverse the buffer */
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left = buffer;
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right = buffer + length;
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while(left < --right) {
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temp = *left;
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*left++ = *right;
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*right = temp;
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}
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*len = length;
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}
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int64_t
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ufmt_uto64(const UChar *buffer,
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int32_t *len,
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int8_t radix)
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{
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const UChar *limit;
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int32_t count;
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int64_t result;
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/* intialize parameters */
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limit = buffer + *len;
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count = 0;
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result = 0;
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/* iterate through buffer */
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while(ufmt_isdigit(*buffer, radix) && buffer < limit) {
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/* read the next digit */
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result *= radix;
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result += ufmt_digitvalue(*buffer++);
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/* increment our count */
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++count;
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}
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*len = count;
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return result;
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}
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UChar*
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ufmt_defaultCPToUnicode(const char *s, int32_t sSize,
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UChar *target, int32_t tSize)
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{
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UChar *alias;
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UErrorCode status = U_ZERO_ERROR;
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UConverter *defConverter = u_getDefaultConverter(&status);
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if(U_FAILURE(status) || defConverter == 0)
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return 0;
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if(sSize <= 0) {
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sSize = uprv_strlen(s) + 1;
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}
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/* perform the conversion in one swoop */
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if(target != 0) {
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alias = target;
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ucnv_toUnicode(defConverter, &alias, alias + tSize, &s, s + sSize - 1,
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NULL, TRUE, &status);
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/* add the null terminator */
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*alias = 0x0000;
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}
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u_releaseDefaultConverter(defConverter);
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return target;
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}
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char*
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ufmt_unicodeToDefaultCP(const UChar *s,
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int32_t len)
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{
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int32_t size;
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char *target, *alias;
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UErrorCode status = U_ZERO_ERROR;
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UConverter *defConverter = u_getDefaultConverter(&status);
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if(U_FAILURE(status) || defConverter == 0)
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return 0;
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/* perform the conversion in one swoop */
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target = (char*)
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uprv_malloc((len + 1) * ucnv_getMaxCharSize(defConverter) * sizeof(char));
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size = (len) * ucnv_getMaxCharSize(defConverter) * sizeof(char);
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if(target != 0) {
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alias = target;
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ucnv_fromUnicode(defConverter, &alias, alias + size, &s, s + len,
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NULL, TRUE, &status);
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/* add the null terminator */
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*alias = 0x00;
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}
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u_releaseDefaultConverter(defConverter);
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return target;
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}
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