常用的XML解析函数

分享几个XML解析函数

解析XML字符串字段

// 返回值：0-成功，-1-失败。
int GetXMLBuffer_Str(const char *in_XMLBuffer,const char *in_FieldName,char *out_Value)
{
    if(in_XMLBuffer == NULL || 
       in_FieldName == NULL || 
       out_Value == NULL) {
        return -1;
    }
    char *p_start, *p_end;
    p_start = p_end = NULL;

    char start_buf[51], end_buf[51];
    memset(start_buf, 0, sizeof(start_buf));
    memset(end_buf, 0, sizeof(end_buf));

    snprintf(start_buf, 50, "<%s>", in_FieldName);
    snprintf(end_buf, 50, "</%s>", in_FieldName);

    p_start = (char *)strstr(in_XMLBuffer, start_buf);
    if(p_start != NULL)
        p_end = (char *)strstr(p_start, end_buf);

    if(p_start == NULL || p_end == NULL)
        return -1;

    int m_NameLen = strlen(in_FieldName);
    int m_ValueLen = p_end - p_start - m_NameLen - 2 + 1 ;

    strncpy(out_Value, p_start + m_NameLen+2, m_ValueLen-1);
    out_Value[m_ValueLen-1] = 0;

    delete_lr_char(out_Value,' ');

    return 0;
}

解析int字段内容

// 返回值：0-成功，-1-失败。
int GetXMLBuffer_Int(const char *in_XMLBuffer,const char *in_FieldName,int *out_Value)
{
    if(in_XMLBuffer == NULL ||
       in_FieldName == NULL ||
       out_Value == NULL) {
        return -1;
    }

    int ret = -1;
    char value[25]; // 字段内容缓冲区大小
    memset(value, 0, sizeof(value));

    ret = GetXMLBuffer_Str(in_XMLBuffer, in_FieldName, value);

    if(ret == -1)
        return -1;

    *out_Value = atoi(value);

    return 0;
}

解析Double字段内容

// 返回值：0-成功，-1-失败。
int GetXMLBuffer_Double(const char *in_XMLBuffer,const char *in_FieldName,double *out_Value)
{

    if(in_XMLBuffer == NULL ||
       in_FieldName == NULL ||
       out_Value == NULL) {
        return -1;
    }

    int ret = -1;
    char value[51]; // 字段内容缓冲区大小
    memset(value, 0, sizeof(value));

    ret = GetXMLBuffer_Str(in_XMLBuffer, in_FieldName, value);

    if(ret == -1)
        return -1;

    *out_Value = atof(value);

    return 0;
}