ascii码转换为int java ASCII码转换为BCD

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1. /*BCD 与 ASCII码转换*/  
2.   
3. /******************************************************************* 
4. 函数名:  asc2bcd  
5. 功能描述:将ascii码转换为bcd码 
6. 参数:     
7.          bcd:转换后的BCD码 
8.          asc:需转换的ASCII码串 
9.          len:需转换的ascii码串长度 
10.  
11. 返回值:  uint32  
12.                               0：成功 
13.                               其他:失败 
14. ********************************************************************/  
15. uint32 asc2bcd(uint8* bcd, const uint8* asc, uint32 len);  
16.   
17. /******************************************************************* 
18. 函数名: bcd2asc  
19. 功能描述:将bcd码转换为ascii码串 
20. 参数:     
21.          asc:转换的ASCII码串 
22.          bcd:需转换的BCD码 
23.          len:需转换的BCD码长度 
24.  
25. 返回值:  uint32  
26.                               0：成功 
27.                               其他:失败 
28. ********************************************************************/  
29. uint32 bcd2asc(uint8* asc, const uint8* bcd, uint32 len);  
    
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1. #include <assert.h>  
2.   
3. #include "utils.h"  
4. //基于查表实现BCD与Ascii之间的转换  
5. static uint8 bcd2ascii[16] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};  
6.   
7. static uint8 ascii2bcd1[10] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};  
8. static uint8 ascii2bcd2[6]  = {0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F};  
 
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1. uint32   
2. ASC2BCD(uint8 *bcd, const uint8 *asc, uint32 len)  
3. {  
4.     uint8 c = 0;  
5.     uint8 index = 0;  
6.     uint8 i = 0;    
7.       
8.     len >>= 1;      
9.   
10. for(; i < len; i++) {  
11. //first BCD  
12. if(*asc >= 'A' && *asc <= 'F') {  
13. 'A';   
14.             c  = ascii2bcd2[index] << 4;  
15. else if(*asc >= '0' && *asc <= '9') {  
16. '0';  
17.             c  = ascii2bcd1[index] << 4;  
18.         }  
19.         asc++;  
20.   
21. //second BCD  
22. if(*asc >= 'A' && *asc <= 'F') {  
23. 'A';   
24.             c  |= ascii2bcd2[index];  
25. else if(*asc >= '0' && *asc <= '9') {  
26. '0';  
27.             c  |= ascii2bcd1[index];  
28.         }  
29.         asc++;  
30.   
31.         *bcd++ = c;  
32.     }     
33.   
34. return 0;  
35. }  
 
 
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1. uint32  
2. BCD2ASC (uint8 *asc, const uint8 *bcd, uint32 len)  
3. {  
4.     uint8 c = 0;  
5.     uint8 i;  
6.   
7.   
8. for(i = 0; i < len; i++) {  
9. //first BCD  
10.         c = *bcd >> 4;  
11.         *asc++ = bcd2ascii[c];  
12.   
13.   
14. //second  
15.         c = *bcd & 0x0f;  
16.         *asc++ = bcd2ascii[c];  
17.         bcd++;  
18.     }  
19.   
20.   
21. return 0;  
22. }  
 
 
 
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1. int main(void)//测试程序  
2. {  
3. const unsigned char ascii[12] = {'1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C'};  
4. char bcd[6];  
5.   
6.     ASC2BCD(bcd, ascii, 12, 0);   
7.       
8. int i = 0;  
9.   
10. "ascii = %s\n", ascii);  
11.   
12. for(; i < 6; i++) {  
13. "bcd = 0x%.2x\n", bcd[i]);  
14.     }     
15.   
16. /*   
17.        unsigned char ascii[13] = {0}; 
18.        const unsigned char bcd[6] = {0x01, 0x23, 0x45, 0xCD, 0xEF, 0xAB}; 
19.  
20.        BCD2ASC(ascii, bcd, 6, 0); 
21.        printf("ascii = %s\n", ascii); 
22.        */  
23. return 0;  
24. }