BCD and ASCII transcoding-C language implementation

Recently because of the project needs, need to convert the BCD code to the corresponding string, the following is the C language implementation, tested good!

Reprint please indicate the source!

/*BCD and ASCII code conversion *//******************************************************************* function name:  ASC2BCD Function Description: Convert ASCII code to BCD parameter: BCD:             converted BCD Code         ASC: ASCII string to convert         len: ASCII string length to be converted return value:  uint32                               0: Success                              Other: Failure /uint32 ASC2BCD (uint8* BCD, const uint8* ASC, UInt32 len);/******************************************************************* function Name: Bcd2asc function Description: Convert BCD code to ASCII string parameter:             ASC: Converted ASCII string BCD: BCD code to be converted         len: BCD code length to convert:  uint32                               0: Success                              Other: Failure /uint32 BCD2ASC (uint8* ASC, const uint8* BCD, UInt32 Len);

#include <assert.h> #include "utils.h"//Based on look-up table for conversion between BCD and ASCII static uint8 bcd2ascii[16] = {' 0 ', ' 1 ', ' 2 ', ' 3 ', ' 4 ', ' 5 ', ' 6 ', ' 7 ', ' 8 ', ' 9 ', ' A ', ' B ', ' C ', ' D ', ' E ', ' F '};static uint8 ascii2bcd1[10] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};static Uint8 Ascii2bcd2[6]  = {0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F};

UInt32 ASC2BCD (uint8 *bcd, const uint8 *ASC, UInt32 len) {    uint8 c = 0;    Uint8 index = 0;    Uint8 i = 0;          Len >>= 1;        for (; i < Len; i++) {        //first BCD        if (*asc >= ' A ' && *asc <= ' F ') {            index = *asc-' A ';             c  = Ascii2bcd2[index] << 4;        } else if (*asc >= ' 0 ' && *asc <= ' 9 ') {            index = *ASC-' 0 '; C12/>c  = Ascii2bcd1[index] << 4;        }        asc++;        Second BCD        if (*asc >= ' a ' && *asc <= ' F ') {            index = *asc-' a ';             C  |= Ascii2bcd2[index];        } else if (*asc >= ' 0 ' && *asc <= ' 9 ') {            index = *ASC-' 0 ';            C  |= Ascii2bcd1[index];        }        asc++;        *bcd++ = C;    }       return 0;}

UINT32BCD2ASC (uint8 *asc, const uint8 *BCD, UInt32 len) {    uint8 c = 0;    Uint8 i;    for (i = 0; i < len; i++) {        //first BCD        c = *bcd >> 4;        *asc++ = Bcd2ascii[c];        Second        C = *bcd & 0x0f;        *asc++ = Bcd2ascii[c];        bcd++;    }    return 0;}

int main (void)//test program {    const unsigned char ascii[12] = {' 1 ', ' 2 ', ' 3 ', ' 4 ', ' 5 ', ' 6 ', ' 7 ', ' 8 ', ' 9 ', ' A ', ' B ', ' C '};
   unsigned Char bcd[6];    ASC2BCD (BCD, ASCII, 0);         int i = 0;    printf ("ASCII =%s\n", ASCII);    for (; i < 6; i++) {        printf ("BCD = 0x%.2x\n", bcd[i]);    }       /*         unsigned char ascii[13] = {0};       Const unsigned char bcd[6] = {0x01, 0x23, 0x45, 0xCD, 0xEF, 0xAB};       BCD2ASC (ASCII, BCD, 6, 0);       printf ("ASCII =%s\n", ASCII);       */    return 0;}

BCD and ASCII transcoding-C language implementation