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C数组模拟总线结构

分类： C/C++

2015-12-02 16:11:27


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  1. #include <string.h>
  2. #include <stdlib.h>
  3. #include <stdio.h>

  5. #define FMLFLD_NOTARRAY 0 /* 非数组（用于下标参数） */
  6. #define FMLFLD_OPTIONAL 0 /* 可选域 */
  7. #define FMLFLD_REQUIRED 1 /* 必需域 */
  8. #define    SYM_FML_FS    0x40    /* 域分隔符0x1E*/
  9. #define    SYM_FML_NV    ':'     /* 名值分隔符*/
  10. #define    SYM_FML_AN    '#'     /* 数组下标起始符*/
  11. #define RC_SUCC 0
  12. #define RC_NFND -1
  13. #define RC_NSPC -2

  15. #define SZ_DATA_BUS (32*1024) /* 数据总线宽度 */
  16. typedef char T_DATABUS[SZ_DATA_BUS]; /* 数据总线 */

  18. void FmlDataClear(char *    cFmlData);
  19. char *FmlFieldSeek(const char *cFmlData, const char *cFieldName,int    iIndex);
  20. int    FmlFieldPut(char *cFmlData,int iBufSize,char *cFieldName,int iIndex,char *cFieldValue);
  21. int FmlFieldGet(const char *cFmlData,const char *cFieldName,int    iIndex,    char *cFieldValue,int iValueSize);
  22. int    FmlFieldNum(const char *cFmlData, const char *cFieldName, int *iNum);

  24. /*FmlDataClear 函数功能：清空数据总线函数*/
  25. void FmlDataClear(char *    cFmlData)
  26. {
  27.     cFmlData[0] = 0;
  28. }

  30. /*FmlFieldErase函数：擦除总线数据中的指定域，没有这个域就不擦除*/
  31. void    FmlFieldErase(char *cFmlData, const char *cFieldName,int iIndex)
  32. {
  33.     char    *p, *q;
  34.     if ( ( p = FmlFieldSeek( cFmlData, cFieldName, iIndex ) ) == NULL )
  35.         return; /*p指向指定的域名的起始地址*/
  36.     if ( ( q = strchr( p, SYM_FML_FS ) ) == NULL ) /*SYM_FML_FS:域分割符^^*/
  37.         q = p + strlen( p );
  38.     else
  39.         q ++; /*q指向域尾*/
  40.     strcpy( p, q ); /*p到q之间的被跳过*/
  41. }

  43. /*FmlFieldSeek函数功能：检索总线中指定域函数，返回指定域的起始地址*/
  44. char *FmlFieldSeek(const char *cFmlData, const char *cFieldName,int    iIndex)
  45. {
  46.     char    *p = (char *) cFmlData;
  47.     char    *n, *q, *v;
  48.     int    r;

  50.     while ( ( n = strchr( p, SYM_FML_FS ) ) != NULL )/*SYM_FML_FS:域分割符^^*/
  51.     {    
  52.         *n = 0; /*n指向下一个域分割符^^，并截断*/
  53.         q = strchr( p, SYM_FML_NV ); /*SYM_FML_NV:名值分割符：*/
  54.         *n = SYM_FML_FS; /*恢复域分割符，重新连上总线*/
  55.         if ( q != NULL )
  56.         {
  57.             *q = 0; /*q指向名值分割符：，并截断*/
  58.             if ( ( v = strchr( p, SYM_FML_AN ) ) != NULL ) /*0下标时，v=NULL*/
  59.                 *v = 0; /*v指向数组下标起始符#，并截断*/
  60.             if ( ( r = strcmp( p, cFieldName ) ) == 0 ) /*比较p指向的是不是待检索的域名*/
  61.             {
  62.                 if ( v == NULL && iIndex != FMLFLD_NOTARRAY || v != NULL && atoi( v + 1 ) != iIndex )
  63.                     r = -1; /*对下标值的检查，出错时r=-1*/
  64.             }
  65.             if ( v != NULL )
  66.                 *v = SYM_FML_AN; /*重新连上总线*/
  67.             *q = SYM_FML_NV; /*重新连上总线*/
  68.             if ( r == 0 ) /*域名匹配，下标也正确时，查找完毕*/
  69.                 return p; /*返回域名起始地址*/
  70.         }
  71.         p = n + 1; /*p指向下一个域名起始地址，继续循环查找*/
  72.     }
  73.     return NULL;
  74. }


  77. /*FmlFieldPut() 功能描述: 为总线中指定域赋值函数*/
  78. int    FmlFieldPut(char *cFmlData,int iBufSize,char *cFieldName,int iIndex,char *cFieldValue)
  79. {
  80.     int    s, l;
  81.     char    a[12];

  83.     FmlFieldErase( cFmlData, cFieldName, iIndex ); /*擦除指定域名域值*/

  85.     if ( iIndex == FMLFLD_NOTARRAY ) /*FMLFLD_NOTARRAY=0,判断是否是0下标*/
  86.         s = 0; /*0下标时，没有数组下标起始符#，也没有小标值0的显示*/
  87.     else
  88.         s = snprintf( a, sizeof( a ), "%d", iIndex ) + 1; /*下标的长度+#号码长度*/
  89.     if ( ( l = strlen( cFmlData ) ) + strlen( cFieldName ) + s + strlen( cFieldValue ) + 2 > iBufSize )
  90.         return RC_NSPC; /*判断是否溢出，其中2=域分隔符+'\0'*/
  91.     if ( l > 0 && cFmlData[l-1] != SYM_FML_FS ) /*SYM_FML_FS域分割符^^，原串没有域分割符时*/
  92.     {
  93.         cFmlData[l] = SYM_FML_FS; /*原串尾加上域分隔符*/
  94.         l ++; /*原串长+1*/
  95.     }

  97.     if ( s != 0 ) /*非0下标时*/
  98.         /*a中保存的是下标值*/
  99.         sprintf( cFmlData + l, "%s%c%s%c%s%c", cFieldName, SYM_FML_AN, a, SYM_FML_NV, cFieldValue, SYM_FML_FS );
  100.     else /*0下标时*/
  101.         sprintf( cFmlData + l, "%s%c%s%c", cFieldName, SYM_FML_NV,
  102.         cFieldValue, SYM_FML_FS );

  104.     return RC_SUCC;
  105. }


  108. /*FmlFieldGet() 功能描述: 从总线中取指定域值函数*/
  109. int FmlFieldGet(const char *cFmlData,const char *cFieldName,int    iIndex,    char *cFieldValue,int iValueSize)
  110. {
  111.     char    *p, *q, *v;
  112.     int    l;
  113.     
  114.     if ( ( p = FmlFieldSeek( cFmlData, cFieldName, iIndex ) ) == NULL )
  115.         return RC_NFND; /*p指向指定域名的起始地址*/
  116.     q = strchr( p, SYM_FML_NV ) + 1; /*SYM_FML_NV名值分隔符：,q指向域值的起始地址*/
  117.     if ( ( v = strchr( q, SYM_FML_FS ) ) == NULL ) /*SYM_FML_FS域分隔符^^,v指向域值的尾部地址*/
  118.         l = strlen( q ); /*没有串尾符^^的长度*/
  119.     else
  120.         l = v - q; /*l=域值的长度*/
  121.     if ( l >= iValueSize ) /*要放域值的空间不能小于域值的长度*/
  122.         return RC_NSPC;
  123.     memcpy( cFieldValue, q, l );
  124.     cFieldValue[l] = 0; /*域值的地址加字符串的结束符*/
  125.     return RC_SUCC;
  126. }


  129. /*FmlFieldNum() 功能描述: 统计总线中重复域的个数函数*/
  130. int    FmlFieldNum(const char *cFmlData, const char *cFieldName, int *iNum)
  131. {
  132.     char    *p = (char *) cFmlData;
  133.     char    *n, *q, *v;
  134.     int    r;
  135.     int    num,flag;

  137.     num=0;
  138.     flag=0;

  140.     while ( ( n = strchr( p, SYM_FML_FS ) ) != NULL )
  141.     {
  142.         *n = 0;
  143.         q = strchr( p, SYM_FML_NV );
  144.         *n = SYM_FML_FS;
  145.         if ( q != NULL )
  146.         {
  147.             *q = 0;
  148.             if ( ( v = strchr( p, SYM_FML_AN ) ) != NULL )
  149.                 *v = 0;
  150.             else
  151.             {
  152.                 *iNum=0;
  153.                 if( v != NULL)
  154.                     *v=SYM_FML_AN;
  155.                 *q=SYM_FML_NV;
  156.                 p = n + 1;
  157.                 continue;
  158.             }
  159.             if ( ( r = strcmp( p, cFieldName ) ) == 0 )
  160.             {
  161.                 num++;
  162.                 flag=1;
  163.             }
  164.                 *v=SYM_FML_AN;
  165.                 *q=SYM_FML_NV;
  166.         }
  167.         p = n + 1;
  168.     }
  169.     *iNum=num;
  170.     if(flag == 1)
  171.         return RC_SUCC;
  172.     else
  173.         return RC_NFND;
  174. }


  177. int main(int argc, char ** argv)
  178. {

  180.     int length = sizeof(T_DATABUS);
  181.     printf("length = [%d]\n", length);
  182.     
  183.     char    sMesg[256];
  184.     char    seqno_0[128];
  185.     char    seqno_1[128];
  186.     char    seqno_2[128];
  187.     char    seqno_3[128];
  188.     char    name[128];
  189.     int        ret = -1;
  190.     int        count = -1;
  191.     T_DATABUS tDataBus; /*内部数据总线*/

  193.     memset(sMesg, 0, sizeof(sMesg));
  194.     memset(seqno_0, 0, sizeof(seqno_0));
  195.     memset(seqno_1, 0, sizeof(seqno_1));
  196.     memset(seqno_2, 0, sizeof(seqno_2));
  197.     memset(seqno_3, 0, sizeof(seqno_3));
  198.     memset(name, 0, sizeof(name));

  200.     FmlDataClear(tDataBus);
  201.     FmlFieldPut(tDataBus, SZ_DATA_BUS, "retmsg", 0, "取平台流水号失败");
  202.     printf("tdataBus = [%s]\n", tDataBus);
  203.     FmlFieldPut(tDataBus, SZ_DATA_BUS, "wangxiancai", 0, "");
  204.     printf("tdataBus = [%s]\n", tDataBus);
  205.     FmlFieldPut(tDataBus, SZ_DATA_BUS, "retcode", 0, "999999");
  206.     printf("tdataBus = [%s]\n", tDataBus);
  207.     FmlFieldPut(tDataBus, SZ_DATA_BUS, "seqno", 0, "000000");
  208.     FmlFieldPut(tDataBus, SZ_DATA_BUS, "seqno", 1, "111111");
  209.     FmlFieldPut(tDataBus, SZ_DATA_BUS, "seqno", 2, "222222");
  210.     FmlFieldPut(tDataBus, SZ_DATA_BUS, "seqno", 3, "333333");
  211.     FmlFieldPut(tDataBus, SZ_DATA_BUS, "seqno", 4, "444444");
  212.     FmlFieldPut(tDataBus, SZ_DATA_BUS, "seqno", 5, "222222");
  213.     FmlFieldPut(tDataBus, SZ_DATA_BUS, "seqno", 6, "666666");
  214.     FmlFieldPut(tDataBus, SZ_DATA_BUS, "seqno", 7, "777777");
  215.     FmlFieldPut(tDataBus, SZ_DATA_BUS, "seqno", 8, "888888");
  216.     FmlFieldPut(tDataBus, SZ_DATA_BUS, "seqno", 9, "999999");
  217.     FmlFieldPut(tDataBus, SZ_DATA_BUS, "seqno", 20, "aaaaa");
  218.     FmlFieldPut(tDataBus, SZ_DATA_BUS, "seqno", 30000, "bbbbb");
  219.     ret=FmlFieldGet(tDataBus, "retmsg", 0, sMesg, sizeof(sMesg));
  220.     printf("sMesg = [%s]\n", sMesg);
  221.     /*ret = FmlFieldGet(tDataBus, "seqno", 0, seqno_0, sizeof(seqno_0));*/
  222.     ret = FmlFieldGet(tDataBus, "seqno", 1, seqno_1, sizeof(seqno_1));
  223.     ret = FmlFieldGet(tDataBus, "seqno", 10, seqno_2, sizeof(seqno_2));
  224.     
  225.     ret = FmlFieldNum(tDataBus, "seqno", &count);
  226.     
  227.     printf("seqno_0 = [%s]\n", seqno_0);
  228.     printf("seqno_1 = [%s]\n", seqno_1);
  229.     printf("seqno_2 = [%s]\n", seqno_2);
  230.     printf("count(seqno) = [%d]\n",count);
  231.     
  232.     FmlFieldPut(tDataBus, SZ_DATA_BUS, "retmsg", 0, "第二次向databus中put retmsg");
  233.     printf("tdataBus = [%s]\n", tDataBus);
  234.     ret=FmlFieldGet(tDataBus, "wangxiancai", 2, name, sizeof(name));
  235.     printf("name = [%s]\n", name);
  236.     memset(name, 0, sizeof(name));
  237.     ret=FmlFieldGet(tDataBus, "wangxiancai111", 0, name, sizeof(name));
  238.     printf("ret = [%d]\n", ret);
  239.     printf("name = [%s]\n", name);
  240.     return 0;
  241. }

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