C语言对unicode的支持情况如何
我只知道string一类的函数一碰到unicode就马上歇菜了。。有没有什么unicode相关的函数啊
我这边有点USC2 的string操作函数，是我从别处copy过来的
给你起个抛砖引玉的作用吧
#include "stdio.h"
#include "stdlib.h"
#include "string.h"
typedef unsigned char kal_uint8;
typedef signed char kal_int8;
typedef char kal_char;
typedef unsigned short kal_wchar;
typedef unsigned short int kal_uint16;
typedef signed short int kal_int16;
typedef unsigned int kal_uint32;
typedef signed int kal_int32;
typedef enum
{
KAL_FALSE,
KAL_TRUE
} kal_bool;
#ifndef NULL
#define NULL (void *)0x0000
#endif
#define ENCODING_LENGTH 2
/*****************************************************************************
* FUNCTION
* app_unicode_to_ucs2encoding
* DESCRIPTION
* convert unicode to UCS2 encoding
* PARAMETERS
* unicode [IN] Value to be encoded
* charLength [OUT]
* arrOut [OUT]
* array [OUT] Of kal_uint8
* RETURNS
* kal_uint8 -> Status
*****************************************************************************/
kal_uint8 app_unicode_to_ucs2encoding(kal_wchar unicode, kal_uint8 *charLength, kal_uint8 *arrOut)
{
/*----------------------------------------------------------------*/
/* Local Variables */
/*----------------------------------------------------------------*/
kal_uint8 status = 1;
kal_uint8 index = 0;
/*----------------------------------------------------------------*/
/* Code Body */
/*----------------------------------------------------------------*/
if (arrOut != 0)
{
if (unicode < 256)
{
arrOut[index++] = *((kal_uint8*) (&unicode));
arrOut[index] = 0;
}
else
{
arrOut[index++] = *((kal_uint8*) (&unicode));
arrOut[index] = *(((kal_uint8*) (&unicode)) + 1);
}
*charLength = 2;
}
else
{
status = 0;
}
#ifdef __FOR_TESTING /* MMI_ON_HARDWARE_P */
if (arrOut != 0)
{
if (unicode < 256)
{
arrOut[index++] = 0; /* *((kal_uint8*)(&unicode)); */
arrOut[index] = *((kal_uint8*) (&unicode));
}
else
{
arrOut[index++] = *(((kal_uint8*) (&unicode)) + 1); /* *((kal_uint8*)(&unicode)); */
arrOut[index] = *((kal_uint8*) (&unicode)); /* *(((kal_uint8*)(&unicode)) + 1); */
}
*charLength = 2;
}
else
{
status = 0;
}
#endif /* __FOR_TESTING */
return status;
}
/*****************************************************************************
* FUNCTION
* app_ucs2encoding_to_unicode
* DESCRIPTION
* convert UCS2 encoded scheme to unicode
* PARAMETERS
* pUnicode [OUT] Equivalent
* arr [IN] array containing UCS2 encoded characters
* RETURNS
* kal_uint8 -> Status
*****************************************************************************/
kal_uint8 app_ucs2encoding_to_unicode(kal_wchar *pUnicode, kal_uint8 *arr)
{
/*----------------------------------------------------------------*/
/* Local Variables */
/*----------------------------------------------------------------*/
kal_uint8 index = 0;
kal_uint8 status = 1;
/*----------------------------------------------------------------*/
/* Code Body */
/*----------------------------------------------------------------*/
if ((arr != NULL) && (pUnicode != NULL))
{
*((kal_uint8*) (pUnicode)) = arr[index++];
*(((kal_uint8*) (pUnicode)) + 1) = arr[index];
}
else
{
status = 0;
}
#ifdef __FOR_TESTING /* MMI_ON_HARDWARE_P */
if ((arr != NULL) && (pUnicode != NULL))
{
*((kal_uint8*) (pUnicode)) = arr[index]; /* arr[index++]; */
*(((kal_uint8*) (pUnicode)) + 1) = arr[index++]; /* arr[index]; */
}
else
{
status = 0;
}
#endif /* __FOR_TESTING */
return status;
}
/*****************************************************************************
* FUNCTION
* app_ucs2_strlen
* DESCRIPTION
* The function is used for query UCS2 string length in character not in bytes.
* PARAMETERS
* arrOut [IN] UCS2 string
* RETURNS
* Return UCS2 string length in character not in bytes
*****************************************************************************/
kal_int32 app_ucs2_strlen(const kal_int8 *arrOut)
{
/*----------------------------------------------------------------*/
/* Local Variables */
/*----------------------------------------------------------------*/
kal_int32 nCount = 0;
kal_int32 nLength = 0;
/*----------------------------------------------------------------*/
/* Code Body */
/*----------------------------------------------------------------*/
/* Check for NULL character only at the odd no. of bytes
assuming forst byte start from zero */
if (arrOut)
{
while (arrOut[nCount] != 0 || arrOut[nCount + 1] != 0)
{
++nLength;
nCount += 2;
}
}
return nLength; /* One is added to count 0th byte */
}
/*****************************************************************************
* FUNCTION
* app_ucs2_strcmp
* DESCRIPTION
* The function is used for compare UCS2 strings.
* PARAMETERS
* string1 [IN] UCS2 string1
* string2 [IN] UCS2 string2
* RETURNS
* <0 - string1 less than string2
* 0 - string1 identical to string2
* >0 - string1 greater than string2
*****************************************************************************/
kal_int32 app_ucs2_strcmp(const kal_int8 *string1, const kal_int8 *string2)
{
/*----------------------------------------------------------------*/
/* Local Variables */
/*----------------------------------------------------------------*/
/*----------------------------------------------------------------*/
/* Code Body */
/*----------------------------------------------------------------*/
while ((*string1 == *string2) && (*(string1 + 1) == *(string2 + 1)))
{
if ((*string1 == 0) && (*(string1 + 1) == 0))
{
return 0;
}
string1 += 2;
string2 += 2;
} /* End of while */
/* The return value indicates the lexicographic relation of string1 to string2 */
/* ie < 0 , > 0 and 0 */
if (*string1 == *string2 && *(string1 + 1) != *(string2 + 1))
{
return (*(string1 + 1) - *(string2 + 1));
}
else
{
return (*string1 - *string2);
}
}
/*****************************************************************************
* FUNCTION
* app_ucs2_unconditional_strcmp
* DESCRIPTION
* compares two strings no conditional about uppercase and lowercase.
* PARAMETERS
* string1 [IN] > first String
* string2 [IN] > Second String
* RETURNS
*
*****************************************************************************/
kal_int32 app_ucs2_unconditional_strcmp(const kal_int8 *string1, const kal_int8 *string2)
{
/*----------------------------------------------------------------*/
/* Local Variables */
/*----------------------------------------------------------------*/
/*----------------------------------------------------------------*/
/* Code Body */
/*----------------------------------------------------------------*/
while ((*string1 == *string2) ||
((*string1 + 0x20) == *string2) ||
(*string1 == (*string2 + 0x20)) &&
(*(string1 + 1) == *(string2 + 1)))
{
if ((*string1 == 0) && (*(string1 + 1) == 0))
{
return 0;
}
string1 += 2;
string2 += 2;
} /* End of while */
/* The return value indicates the lexicographic relation of string1 to string2 */
/* ie < 0 , > 0 and 0 */
if (*string1 == *string2 && *(string1 + 1) != *(string2 + 1))
{
return (*(string1 + 1) - *(string2 + 1));
}
else
{
return (*string1 - *string2);
}
}
/*****************************************************************************
* FUNCTION
* app_ucs2_strcpy
* DESCRIPTION
* The function is used for copy UCS2 string.
* PARAMETERS
* strDestination [OUT] UCS2 destination string
* strSource [IN] UCS2 source string
* RETURNS
* Return the destination string.
*****************************************************************************/
kal_int8 *app_ucs2_strcpy(kal_int8 *strDestination, const kal_int8 *strSource)
{
/*----------------------------------------------------------------*/
/* Local Variables */
/*----------------------------------------------------------------*/
kal_wchar count = 1;
kal_int8 *temp = strDestination;
/*----------------------------------------------------------------*/
/* Code Body */
/*----------------------------------------------------------------*/
if (strSource == NULL)
{
if (strDestination)
{
*(strDestination + count - 1) = '\0';
*(strDestination + count) = '\0';
}
return temp;
}
if (strDestination == NULL || strSource == NULL)
{
return NULL;
}
while (!((*(strSource + count) == 0) && (*(strSource + count - 1) == 0)))
{
*(strDestination + count - 1) = *(strSource + count - 1);
*(strDestination + count) = *(strSource + count);
count += 2;
}
*(strDestination + count - 1) = '\0';
*(strDestination + count) = '\0';
return temp;
}
/*****************************************************************************
* FUNCTION
* app_ucs2_strncmp
* DESCRIPTION
* The function is used for compare UCS2 characters of two strings. Size is
* the character number not the byte numbers.
* PARAMETERS
* string1 [IN] UCS2 string1
* string2 [IN] UCS2 string2
* size [IN] Number in character (not byte)
* RETURNS
* <0 - string1 substring less than string2 substring
* 0 - string1 substring identical to string2 substring
* >0 - string1 substring greater than string2 substring
*****************************************************************************/
/* MTK Added by Tim for solve a potential wrong answer when string1 and string2 are the same and less than "size" */
kal_int32 app_ucs2_strncmp(const kal_int8 *string1, const kal_int8 *string2, kal_uint32 size)
{
/*----------------------------------------------------------------*/
/* Local Variables */
/*----------------------------------------------------------------*/
kal_uint32 count = 0;
kal_wchar nStr1;
kal_wchar nStr2;
/*----------------------------------------------------------------*/
/* Code Body */
/*----------------------------------------------------------------*/
size = size << 1; /* User is passing no of charcters not bytes */
while (count < size)
{
nStr1 = (string1[1] << 8) | (kal_uint8)string1[0];
nStr2 = (string2[1] << 8) | (kal_uint8)string2[0];
if (nStr1 == 0 || nStr2 == 0 || nStr1 != nStr2)
{
return nStr1 - nStr2;
}
string1 += 2;
string2 += 2;
count += 2;
}
return 0;
}
/* End MTK: Tim */
/*****************************************************************************
* FUNCTION
* app_ucs2_strncpy
* DESCRIPTION
* The function is used for copy UCS2 characters of one string to another.
* If size is less than the length of strSource, a null character is still
* appended automatically to strDestination. If size is greater than the
* length of strSource, strDestination is padding with null characters up
* to length size. The function behavior is a little bit different from strncpy.
* PARAMETERS
* strDestination [OUT] UCS2 destination string
* strSource [IN] UCS2 source string
* size [IN] Size in character (not byte)
* RETURNS
* Return the destination string.
*****************************************************************************/
kal_int8 *app_ucs2_strncpy(kal_int8 *strDestination, const kal_int8 *strSource, kal_uint32 size)
{
/*----------------------------------------------------------------*/
/* Local Variables */
/*----------------------------------------------------------------*/
kal_wchar count = 1;
kal_uint32 count1 = 0;
kal_int8 *temp = strDestination;
/*----------------------------------------------------------------*/
/* Code Body */
/*----------------------------------------------------------------*/
size = size * 2;
/* MMI_ASSERT(!(strDestination == NULL)); */
while (!((*(strSource + count) == 0) && (*(strSource + count - 1) == 0)) && (count1 < size))
{
*(strDestination + count - 1) = *(strSource + count - 1);
*(strDestination + count) = *(strSource + count);
count += 2;
count1 += 2;
}
*(strDestination + count - 1) = '\0';
*(strDestination + count) = '\0';
return temp;
}
/*****************************************************************************
* FUNCTION
* app_ucs2_strcat
* DESCRIPTION
* The function is used for append strSource to strDestination and terminate
* the resulting string with a null character.
* PARAMETERS
* strDestination [OUT] UCS2 destination string
* strSource [IN] UCS2 source string
* RETURNS
* Return the destination string
*****************************************************************************/
kal_int8 *app_ucs2_strcat(kal_int8 *strDestination, const kal_int8 *strSource)
{
/*----------------------------------------------------------------*/
/* Local Variables */
/*----------------------------------------------------------------*/
kal_int8 *dest = strDestination;
/*----------------------------------------------------------------*/
/* Code Body */
/*----------------------------------------------------------------*/
dest = dest + app_ucs2_strlen(strDestination) * ENCODING_LENGTH;
app_ucs2_strcpy(dest, strSource);
return strDestination;
}
/*****************************************************************************
* FUNCTION
* app_ucs2_strncat
* DESCRIPTION
* The function is used for append the first size characters of strSource
* to strDestination and terminate the resulting string with a null character.
* PARAMETERS
* strDestination [OUT] UCS2 destination string
* strSource [IN] UCS2 source string
* size [IN] Size in character (not byte)
* RETURNS
* Return the destination string
*****************************************************************************/
kal_int8 *app_ucs2_strncat(kal_int8 *strDestination, const kal_int8 *strSource, kal_uint32 size)
{
/*----------------------------------------------------------------*/
/* Local Variables */
/*----------------------------------------------------------------*/
kal_int8 *dest = strDestination;
/*----------------------------------------------------------------*/
/* Code Body */
/*----------------------------------------------------------------*/
dest = dest + app_ucs2_strlen(strDestination) * ENCODING_LENGTH;
app_ucs2_strncpy(dest, strSource, size);
return strDestination;
}
/*****************************************************************************
* FUNCTION
* app_ucs2str_appendchar
* DESCRIPTION
*
*
* User has to ensure that enough space is
* available in destination
* PARAMETERS
* strDestination [OUT]
* ch [IN]
* RETURNS
* kal_int8
*****************************************************************************/
kal_int8 *app_ucs2str_appendchar(kal_int8 *strDestination, kal_wchar ch)
{
/*----------------------------------------------------------------*/
/* Local Variables */
/*----------------------------------------------------------------*/
kal_int8 *dest = strDestination;
kal_wchar buffer[2];
/*----------------------------------------------------------------*/
/* Code Body */
/*----------------------------------------------------------------*/
dest = dest + app_ucs2_strlen(strDestination) * ENCODING_LENGTH;
buffer[0] = ch;
buffer[1] = 0;
app_ucs2_strcpy(dest, (const kal_int8*)buffer);
return strDestination;
}
/*****************************************************************************
* FUNCTION
* app_ucs2str_n_appendchar
* DESCRIPTION
*
*
* User has to ensure that enough space is
* available in destination
* PARAMETERS
* strDestination [OUT]
* ch [IN]
* size [IN]
* RETURNS
* kal_int8
*****************************************************************************/
kal_int8 *app_ucs2str_n_appendchar(kal_int8 *strDestination, kal_wchar ch, kal_uint32 size)
{
/*----------------------------------------------------------------*/
/* Local Variables */
/*----------------------------------------------------------------*/
kal_int8 *dest = strDestination;
kal_wchar buffer[2];
/*----------------------------------------------------------------*/
/* Code Body */
/*----------------------------------------------------------------*/
dest = dest + app_ucs2_strlen(strDestination) * ENCODING_LENGTH;
buffer[0] = ch;
buffer[1] = 0;
app_ucs2_strncpy(dest, (const kal_int8*)buffer, size);
return strDestination;
}
/*****************************************************************************
* FUNCTION
* app_ansii_to_unicodestring
* DESCRIPTION
* The function is used for convert ANSII string to UCS2 string. The caller
* need to make sure the pOutBuffer size must have enough space or the function
* causes the memory corruption. The function will add the terminated character
* at the end of pOutBuffer array. The byte order of UCS2 character(output param)
* is little endian.
* PARAMETERS
* pOutBuffer [OUT] UCS2 destination string
* pInBuffer [IN] ANSII source string
* RETURNS
* Return the bytes to convert.
*****************************************************************************/
kal_uint16 app_ansii_to_unicodestring(kal_int8 *pOutBuffer, kal_int8 *pInBuffer)
{
/*----------------------------------------------------------------*/
/* Local Variables */
/*----------------------------------------------------------------*/
kal_int16 count = -1;
kal_uint8 charLen = 0;
kal_uint8 arrOut[2];
/*----------------------------------------------------------------*/
/* Code Body */
/*----------------------------------------------------------------*/
while (*pInBuffer != '\0')
{
app_unicode_to_ucs2encoding((kal_wchar) (*((kal_uint8 *)pInBuffer)), &charLen, arrOut);
// #ifdef MMI_ON_WIN32
pOutBuffer[++count] = arrOut[0];
pOutBuffer[++count] = arrOut[1];
pInBuffer++;
// #endif
#ifdef __FOR_TESTING /* MMI_ON_HARDWARE_P */
pOutBuffer[++count] = arrOut[1]; /* arrOut[0]; */
pOutBuffer[++count] = arrOut[0]; /* arrOut[1]; */
pInBuffer++;
#endif /* __FOR_TESTING */
}
pOutBuffer[++count] = '\0';
pOutBuffer[++count] = '\0';
return count + 1;
}
/*****************************************************************************
* FUNCTION
* app_ansii_n_to_unicodestring
* DESCRIPTION
* The function is used for convert the characters of ANSII string to UCS2
* string. The caller need to make sure the pOutBuffer size is greater than
* len and the function doesn't add the terminated character at the end of
* the pOutBuffer array. The byte order of UCS2 character(output param) is
* little endian.
* PARAMETERS
* pOutBuffer [OUT] UCS2 destination string.
* pInBuffer [IN] ANSII source string
* len [IN] Length in bytes
* RETURNS
* Return the bytes to convert.
*****************************************************************************/
kal_uint16 app_ansii_n_to_unicodestring(kal_int8 *pOutBuffer, kal_int8 *pInBuffer, kal_uint32 len)
{
/*----------------------------------------------------------------*/
/* Local Variables */
/*----------------------------------------------------------------*/
kal_int16 count = -1;
kal_uint8 charLen = 0;
kal_uint8 arrOut[2];
/*----------------------------------------------------------------*/
/* Code Body */
/*----------------------------------------------------------------*/
while (len)
{
app_unicode_to_ucs2encoding((kal_wchar) (*((kal_uint8 *)pInBuffer)), &charLen, arrOut);
// #ifdef MMI_ON_WIN32
pOutBuffer[++count] = arrOut[0];
pOutBuffer[++count] = arrOut[1];
pInBuffer++;
// #endif
#ifdef __FOR_TESTING /* MMI_ON_HARDWARE_P */
pOutBuffer[++count] = arrOut[1]; /* arrOut[0]; */
pOutBuffer[++count] = arrOut[0]; /* arrOut[1]; */
pInBuffer++;
#endif /* __FOR_TESTING */
len--;
}
return count + 1;
}
/*****************************************************************************
* FUNCTION
* app_ansii_to_unicodestring_ex
* DESCRIPTION
* The function is used for convert ANSII string to UCS2 string. The caller
* need to make sure the pOutBuffer size must have enough space or the function
* causes the memory corruption. The function will add the terminated character
* at the end of pOutBuffer array. The byte order of UCS2 character(output param)
* is little endian.
* Unlike app_ansii_to_unicodestring, it will ignore the controls in ANSII string.
* PARAMETERS
* pOutBuffer [OUT] UCS2 destination string
* pInBuffer [IN] ANSII source string
* RETURNS
* Return the bytes to convert.
*****************************************************************************/
kal_uint16 app_ansii_to_unicodestring_ex(kal_int8 *pOutBuffer, kal_int8 *pInBuffer)
{
/*----------------------------------------------------------------*/
/* Local Variables */
/*----------------------------------------------------------------*/
kal_int16 count = -1;
kal_uint8 charLen = 0;
kal_uint8 arrOut[2];
/*----------------------------------------------------------------*/
/* Code Body */
/*----------------------------------------------------------------*/
while (*pInBuffer != '\0')
{
if ((*pInBuffer > 0x00)&&(*pInBuffer < 0x20)||(*pInBuffer == 0x07F))
{
pInBuffer++;
continue;
}
app_unicode_to_ucs2encoding((kal_wchar) (*((kal_uint8 *)pInBuffer)), &charLen, arrOut);
pOutBuffer[++count] = arrOut[0];
pOutBuffer[++count] = arrOut[1];
pInBuffer++;
}
pOutBuffer[++count] = '\0';
pOutBuffer[++count] = '\0';
return count + 1;
}
/*****************************************************************************
* FUNCTION
* app_ansii_n_to_unicodestring_ex
* DESCRIPTION
* The function is used for convert the characters of ANSII string to UCS2
* string. The caller need to make sure the pOutBuffer size is greater than
* len and the function doesn't add the terminated character at the end of
* the pOutBuffer array. The byte order of UCS2 character(output param) is
* little endian.
* Unlike app_ansii_n_to_unicodestring, it will ignore the controls in ANSII string.
* PARAMETERS
* pOutBuffer [OUT] UCS2 destination string.
* pInBuffer [IN] ANSII source string
* len [IN] Length in bytes
* RETURNS
* Return the bytes to convert.
*****************************************************************************/
kal_uint16 app_ansii_n_to_unicodestring_ex(kal_int8 *pOutBuffer, kal_int8 *pInBuffer, kal_uint32 len)
{
/*----------------------------------------------------------------*/
/* Local Variables */
/*----------------------------------------------------------------*/
kal_int16 count = -1;
kal_uint8 charLen = 0;
kal_uint8 arrOut[2];
/*----------------------------------------------------------------*/
/* Code Body */
/*----------------------------------------------------------------*/
while (len)
{
if ((*pInBuffer > 0x00)&&(*pInBuffer < 0x20)||(*pInBuffer == 0x07F))
{
pInBuffer++;
len--;
continue;
}
app_unicode_to_ucs2encoding((kal_wchar) (*((kal_uint8 *)pInBuffer)), &charLen, arrOut);
pOutBuffer[++count] = arrOut[0];
pOutBuffer[++count] = arrOut[1];
if (*pInBuffer == '\0')
{
break;
}
else
{
pInBuffer++;
}
len--;
}
return count + 1;
}
/*****************************************************************************
* FUNCTION
* app_unicode_to_ansii
* DESCRIPTION
* The function is used for convert UCS2 string to ANSII string.
* The caller need to make sure the pOutBuffer size must have enough space
* or the function causes the memory corruption. The function will add the
* terminated character at the end of pOutBuffer array. The byte order of
* UCS2 character(input param) is little endian.
* PARAMETERS
* pOutBuffer [OUT] ANSII destination string
* pInBuffer [IN] UCS2 source string
* RETURNS
* Return the bytes to convert.
*****************************************************************************/
kal_uint16 app_unicode_to_ansii(kal_int8 *pOutBuffer, kal_int8 *pInBuffer)
{
/*----------------------------------------------------------------*/
/* Local Variables */
/*----------------------------------------------------------------*/
kal_uint16 count = 0;
/*----------------------------------------------------------------*/
/* Code Body */
/*----------------------------------------------------------------*/
while (!((*pInBuffer == 0) && (*(pInBuffer + 1) == 0)))
{
*pOutBuffer = *(pInBuffer);
#ifdef __FOR_TESTING /* MMI_ON_HARDWARE_P */
*pOutBuffer = *(pInBuffer + 1);
#endif
pInBuffer += 2;
pOutBuffer++;
count++;
}
*pOutBuffer = 0;
return count;
}
/*****************************************************************************
* FUNCTION
* app_unicode_n_to_ansii
* DESCRIPTION
* The function is used for convert the characters of UCS2 string to ANSII
* string. The caller need to make sure the pOutBuffer size is greater than
* len and the function doesn't add the terminated character at the end of
* the pOutBuffer array. The byte order of UCS2 character(input param) is l
* ittle endian.
* PARAMETERS
* pOutBuffer [OUT] ANSII destination string.
* pInBuffer [IN] UCS2 source string.
* len [IN] Length in bytes.
* RETURNS
* Return the bytes to convert.
*****************************************************************************/
kal_uint16 app_unicode_n_to_ansii(kal_int8 *pOutBuffer, kal_int8 *pInBuffer, kal_uint32 len)
{
/*----------------------------------------------------------------*/
/* Local Variables */
/*----------------------------------------------------------------*/
kal_uint16 count = 0;
/*----------------------------------------------------------------*/
/* Code Body */
/*----------------------------------------------------------------*/
while ((len) && (!((*pInBuffer == 0) && (*(pInBuffer + 1) == 0))))
{
*pOutBuffer = *(pInBuffer);
#ifdef __FOR_TESTING /* MMI_ON_HARDWARE_P */
*pOutBuffer = *(pInBuffer + 1);
#endif
pInBuffer += 2;
pOutBuffer++;
count++;
len -= 2;
}
return count;
}
/*****************************************************************************
* FUNCTION
* app_unicode_to_utf8_len
* DESCRIPTION
* Calculate the byte number that convert Unicode encode to UTF8 encode
* PARAMETERS
* ucs2 [IN]
* RETURNS
* kal_int32
*****************************************************************************/
kal_int32 app_unicode_to_utf8_len(kal_wchar ucs2)
{
if (ucs2 < (kal_wchar) 0x80)
return 1;
else if (ucs2 < (kal_wchar) 0x800)
return 2;
else
return 3;
}
/*****************************************************************************
* FUNCTION
* app_stricmp
* DESCRIPTION
* Case-insensitive string comparison.
* app_stricmp() compares string s to string t case-insensitively;
* PARAMETERS
* s [IN]
* t [IN]
* RETURNS
* return <0 if s<t, 0 if s==t, or >0 if s>t
*****************************************************************************/
kal_int32 app_stricmp(kal_char *s, kal_char *t)
{
for ( ; tolower(*s) == tolower(*t); s++, t++)
if (*s == '\0')
return 0;
return tolower(*s) - tolower(*t);
}
/*****************************************************************************
* FUNCTION
* app_strnicmp
* DESCRIPTION
* Case-insensitive string comparison for up to n characters.
* PARAMETERS
* s [IN]
* t [IN]
* n [IN] number of compared characters
* RETURNS
* return <0 if s<t, 0 if s==t, or >0 if s>t.
*****************************************************************************/
kal_int32 app_strnicmp(kal_char *s, kal_char *t, int n)
{
if (n < 0)
return n;
for ( ; --n >= 0 && tolower(*s) == tolower(*t); s++, t++)
if (*s == '\0')
return 0;
if (n < 0)
return 0;
else
return tolower(*s) - tolower(*t);
}
/*****************************************************************************
* FUNCTION
* app_strtolower
* DESCRIPTION
* Convert a string to all-lower-case string
* PARAMETERS
* s [IN/OUT]
* RETURNS
* return pointer to the character string passed in.
*****************************************************************************/
kal_char *app_strtolower(kal_char *s)
{
kal_char *orig = s;
for ( ; *s != '\0'; s++)
*s = tolower(*s);
return orig;
}
/*****************************************************************************
* FUNCTION
* app_log2
* DESCRIPTION
* Find the log base 2 of an integer. The log base 2 of an integer is
* the same as the position of the highest bit set.
* PARAMETERS
* i [IN]
* RETURNS
* the log base 2 of an integer
*****************************************************************************/
kal_int32 app_log2(kal_uint32 i)
{
int r = 0;
while (i >>= 1)
r++;
return r;
}
/*****************************************************************************
* FUNCTION
* app_log10
* DESCRIPTION
* Find the log base 10 of an integer.
* log10(i) = log2(i) / log2(10) = log2(i) * (1/log2(10)
* ~= log2(v) * 1233/4096 = log2(v) * 1233 >> 12
* Adding one is needed because the log2() rounds down.
* Finally, since the value t is only an approximation, that may be off
* by one, hte exact value is found by substracting the vlaue of
* v < power_of_10[t].
*
* PARAMETERS
* i [IN]
* RETURNS
* the log base 10 of an integer
*****************************************************************************/
kal_int32 app_log10(kal_uint32 i)
{
kal_int32 t;
kal_uint32 power_of_10[] = {
1, 10, 100, 1000, 10000, 100000,
1000000, 10000000, 100000000, 1000000000};
t = (app_log2(i) + 1) * 1233 >> 12;
return (t - (i < power_of_10[t]));
}
/*****************************************************************************
* FUNCTION
* app_digits
* DESCRIPTION
* return the digits in decimal format of an unsigned integer
* PARAMETERS
* i [IN]
* RETURNS
* the digits of a unsigned integer in decimal format.
*****************************************************************************/
kal_int32 app_intdigits(kal_uint32 i)
{
return app_log10(i) + 1;
}
/*****************************************************************************
* FUNCTION
* app_ucs2_tolower
* DESCRIPTION
* Convert a character to all-lower-case character
* PARAMETERS
* ch [IN] UCS2 encoded character.
* RETURNS
* return the converted character.
*****************************************************************************/
kal_wchar app_ucs2_tolower(kal_wchar ch)
{
if( ch >=L'A' && ch <= L'Z' )
return (kal_wchar)( ch + ('a' - 'A') );
return ch;
}
/*****************************************************************************
* FUNCTION
* app_ucs2_strtolower
* DESCRIPTION
* Convert a string to all-lower-case string
* PARAMETERS
* s [IN/OUT] UCS2 encoded string
* RETURNS
* return pointer to the character string passed in.
*****************************************************************************/
kal_wchar *app_ucs2_strtolower(kal_wchar *s)
{
kal_wchar *orig = s;
for ( ; *s != L'\0'; s++)
*s = app_ucs2_tolower(*s);
return orig;
}
/*****************************************************************************
* FUNCTION
* app_ucs2_strstr
* DESCRIPTION
*
* PARAMETERS
* a [IN]
* p [IN]
* RETURNS
*
*****************************************************************************/
kal_wchar *app_ucs2_strstr(const kal_wchar *a, const kal_wchar *p)
{
/*----------------------------------------------------------------*/
/* Local Variables */
/*----------------------------------------------------------------*/
int i, m, n;
/*----------------------------------------------------------------*/
/* Code Body */
/*----------------------------------------------------------------*/
if (p == NULL || a == NULL)
{
return NULL;
}
m = app_ucs2_wcslen(a);
n = app_ucs2_wcslen(p);
for (i = 0; i < m; i++)
{
int i_tmp = i;
int j = 0;
while (*(a + i) == *(p + j))
{
i++;
j++;
if (j == n)
{
return (kal_wchar*) (a + i_tmp);
}
else if (i >= m)
{
return NULL;
}
}
i = i_tmp;
}
return NULL;
}
