/**
 * friso string type check function interface, 
 *     like english/CJK, full-wdith/half-width, punctuation or not. 
 * @ses    friso_UTF8.c and friso_GBK.c for detail.
 *
 * @author chenxin <chenxin619315@gmail.com>
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "friso_ctype.h"
#include "friso_API.h"

/* check if the specified string is a cn string.
 * 
 * @return int (true for cn string or false)
 * */
FRISO_API int friso_cn_string( 
    friso_charset_t charset, 
    friso_task_t task )
{
    if ( charset == FRISO_UTF8 ) {
        return utf8_cjk_string(task->unicode);
    } else if ( charset == FRISO_GBK ) {
        return gbk_cn_string(task->buffer);
    }

    return 0;
}

//check if the specified word is a whitespace.
FRISO_API int friso_whitespace( 
    friso_charset_t charset, 
    friso_task_t task )
{
    if ( charset == FRISO_UTF8 ) {
        return utf8_whitespace(task->unicode);
    } else if ( charset == FRISO_GBK ) {
        return gbk_whitespace(task->buffer);
    }

    return 0;
}

//check if the specifiled word is a numeric letter.
FRISO_API int friso_numeric_letter(
    friso_charset_t charset,
    friso_task_t task)
{
    if ( charset == FRISO_UTF8 ) {
        return utf8_numeric_letter((uint_t) task->text[task->idx]);
    } else if ( charset == FRISO_GBK ) {
        return gbk_numeric_letter(task->text + task->idx);
    }

    return 0;
}

//check if the specified word is aa english letter.
FRISO_API int friso_en_letter( 
    friso_charset_t charset, 
    friso_task_t task )
{
    if ( charset == FRISO_UTF8 ) {
        return utf8_en_letter( ( uint_t ) task->text[task->idx]);
    } else if ( charset == FRISO_GBK ) {
        return gbk_en_letter( task->text + task->idx );
    }

    return 0;
}

//check if the specified word is a half-width letter.
//    punctuations are inclued.
FRISO_API int friso_halfwidth_en_char( 
    friso_charset_t charset, 
    friso_task_t task )
{
    if ( charset == FRISO_UTF8 ) {
        return utf8_halfwidth_en_char(task->unicode);
    } else if ( charset == FRISO_GBK ) {
        return gbk_halfwidth_en_char(task->buffer[0]);
    }

    return 0;
}

//check if the specified word is a full-width letter.
//    full-width punctuations are not included.
FRISO_API int friso_fullwidth_en_char( 
    friso_charset_t charset, 
    friso_task_t task )
{
    if ( charset == FRISO_UTF8 ) {
        return utf8_fullwidth_en_char( task->unicode );
    } else if ( charset == FRISO_GBK ) {
        return gbk_fullwidth_en_char( task->buffer );
    }

    return 0;
}

//check if the specified word is an english punctuations.
FRISO_API int friso_en_punctuation(
    friso_charset_t charset,
    friso_task_t task )
{
    if ( charset == FRISO_UTF8 ) {
        return utf8_en_punctuation( task->unicode );
    } else if ( charset == FRISO_GBK ) {
        return gbk_en_punctuation( task->buffer[0] );
    }

    return 0;
}

//check if the specified word ia sn chinese punctuation.
FRISO_API int friso_cn_punctuation( 
    friso_charset_t charset, 
    friso_task_t task )
{
    if ( charset == FRISO_UTF8 ) {
        return utf8_cn_punctuation( task->unicode );
    } else if ( charset == FRISO_GBK ) {
        return gbk_cn_punctuation( task->buffer );
    }

    return 0;
}

FRISO_API int friso_letter_number( 
    friso_charset_t charset, 
    friso_task_t task )
{
    return 0;
}

FRISO_API int friso_other_number( 
    friso_charset_t charset, 
    friso_task_t task )
{
    return 0;
}

//check if the word is a keep punctuation.
//@Deprecated
//FRISO_API int friso_keep_punctuation( 
//    friso_charset_t charset, 
//    friso_task_t task )
//{
//    if ( charset == FRISO_UTF8 )
//    return utf8_keep_punctuation( task->buffer );
//    else if ( charset == FRISO_GBK )
//    return gbk_keep_punctuation( task->buffer );
//    return 0;
//}

//check if the specified char is en english punctuation.
//    this function is the same as friso_en_punctuation.
FRISO_API int is_en_punctuation( 
    friso_charset_t charset, char c )
{
    if ( charset == FRISO_UTF8 ) {
        return utf8_en_punctuation( (uint_t) c);
    } else if ( charset == FRISO_GBK ) {
        return gbk_en_punctuation( c );
    }

    return 0;
}

//check the specified string is make up with numeric. 
FRISO_API int friso_numeric_string( 
    friso_charset_t charset, 
    char *buffer )
{
    if ( charset == FRISO_UTF8 ) {
        return utf8_numeric_string( buffer );
    } else if ( charset == FRISO_GBK ) {
        return gbk_numeric_string( buffer );
    }

    return 0;
}

//check the specified string is a decimal string.
FRISO_API int friso_decimal_string( 
    friso_charset_t charset, char *buffer )
{
    if ( charset == FRISO_UTF8 ) {
        return utf8_decimal_string( buffer );
    } else if ( charset == FRISO_GBK ) {
        return gbk_decimal_string( buffer );
    }

    return 0;
}

//check if the specified char is english uppercase letter.
//    included full-width and half-width letters.
FRISO_API int friso_uppercase_letter( 
    friso_charset_t charset, 
    friso_task_t task )
{
    if ( charset == FRISO_UTF8 ) {
        return utf8_uppercase_letter( task->unicode );
    } else if ( charset == FRISO_GBK ) {
        return gbk_uppercase_letter( task->buffer );
    }

    return 0;
}

/* get the type of the specified char.
 *     the type will be the constants defined above.
 * (include the fullwidth english char.)
 */
FRISO_API friso_enchar_t friso_enchar_type( 
    friso_charset_t charset, 
    friso_task_t task )
{
    //Unicode or ASCII.(Both UTF-8 and GBK are valid)
    uint_t u = 0;

    if ( charset == FRISO_UTF8 ) {
        u = task->unicode;
        //if ( u >= 65280 ) u = 65280 - 65248;
    } else if ( charset == FRISO_GBK ) {
        u = (uchar_t)task->buffer[0];
        //if ( u == 0xa3 ) ; //full-width.
    }

    //range check.
    if ( u > 126 || u < 32 )    return FRISO_EN_UNKNOW;
    if ( u == 32 )              return FRISO_EN_WHITESPACE;
    if ( u >= 48 && u <= 57  )  return FRISO_EN_NUMERIC;
    if ( u >= 65 && u <= 90  )  return FRISO_EN_LETTER;
    if ( u >= 97 && u <= 122 )  return FRISO_EN_LETTER;

    return FRISO_EN_PUNCTUATION;
}

/* get the type of the specified en char.
 *     the type will be the constants defined above.
 * (the char should be half-width english char only)
 */
FRISO_API friso_enchar_t get_enchar_type( char ch )
{
    uint_t u = (uchar_t) ch;

    //range check.
    if ( u > 126 || u < 32 )    return FRISO_EN_UNKNOW;
    if ( u == 32 )              return FRISO_EN_WHITESPACE;
    if ( u >= 48 && u <= 57  )  return FRISO_EN_NUMERIC;
    if ( u >= 65 && u <= 90  )  return FRISO_EN_LETTER;
    if ( u >= 97 && u <= 122 )  return FRISO_EN_LETTER;

    return FRISO_EN_PUNCTUATION;
}