C语言中字符串的形式打印16进制数据

C语言中字符串的形式打印16进制数据。这样写，输出更直观些

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#define PRINT_BUF_MAX (32)
#define TAG_STRING_MAX (32)
static void print_step_hex_data(const char *tag, void *pbuf, size_t len)
{
int i;
char buf[PRINT_BUF_MAX * 4] = {0};
char temp_buf[4] = {0};

sprintf(buf,"%s",tag);

for (i=0;i<len;i++) {
if(i % 16 ==0)
strcat(buf,"\n");
sprintf(temp_buf," %02x",*((char *)pbuf + i)&0xff);
strcat(buf, temp_buf);
}
strcat(buf,"\n");

LOGI("%s", buf);
}

void print_hex_data(const char *tag, void *pbuf, size_t len)
{
int i;
uint32_t block;
uint32_t remainder;
void *p;
char tag_buf[TAG_STRING_MAX + 6] = {0};
char tail_buf[6+1] = {0};

p = pbuf;
if (len<=PRINT_BUF_MAX)
return print_step_hex_data(tag, p, len);
else {
block = len / PRINT_BUF_MAX;
remainder = len % PRINT_BUF_MAX;
for (i=0;i<block;i++) {
memcpy(tag_buf,tag,TAG_STRING_MAX);
sprintf(tail_buf,"[%i]",i);
strcat(tag_buf, tail_buf);
print_step_hex_data(tag_buf, p, PRINT_BUF_MAX);
p = (char *)p + PRINT_BUF_MAX;
}
if (remainder) {
memcpy(tag_buf,tag,TAG_STRING_MAX);
sprintf(tail_buf,"[%i]",i);
strcat(tag_buf, tail_buf);
print_step_hex_data(tag_buf, p, remainder);
}
}
}