/*get the num after the "=" of the string
一行字符串有等號“=”連接前後兩部分,等號後面爲十進制數字,本函數是獲取等號後面的“數字”字符串,並把它轉換爲十進制數值返回。
本函數只適用於整形數字轉換,不支持浮點型。
*/
int64_t getEndIntNum(char *str_data)
{
int64_t ret = 0;
uint16_t i = 0;
uint8_t j = 0;
uint8_t strTemp[64] = {0};
char charTemp = 0;
uint8_t startFlag = 0;
uint8_t fistNumStart = 0;
for(i = 0; charTemp = (*(str_data + i)), ( charTemp != '\n' ) && ( charTemp != '\r' ) && ( charTemp != '\0' ); i++ ) {
if(startFlag){//checked the "="
if ( fistNumStart ) {//checked the first valid number
if ( ( charTemp > '9' ) || ( charTemp < '0' ) ) {
printf("\r\n the end of the number");
break;//checked the end of the valid number
} else {
strTemp[j++] = charTemp;
printf("%d",charTemp - '0');
}
} else {
if ( ( charTemp <= '9' ) && ( charTemp >= '0' ) ) {
fistNumStart = 1;
strTemp[j++] = charTemp;
printf("first num is found:%d",charTemp - '0');
continue;
}
}
} else {
if( charTemp != '=' ) {
continue;
} else {
startFlag = 1;
printf("= is found\r\n");
continue;
}
}
}
strTemp[j] = '\0';//the end of one string
ret = strtol((const char *)strTemp,NULL,0);
return ret;
}
該函數,可以自動過濾數字字符串前後的空白字符。通過簡單修改,可以不僅限於“=”連接,也可以是“:”連接前後兩部分。