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#include "tar.h"
int record_write(int fd, char *s, size_t size)
{
char buf[RECORD_SIZE];
while (size > RECORD_SIZE)
{
memcpy(buf, s, RECORD_SIZE);
s += RECORD_SIZE;
size -= RECORD_SIZE;
if (write(fd, buf, RECORD_SIZE) == -1)
{
perror(NULL);
return -1;
}
}
bzero(buf, RECORD_SIZE);
memcpy(buf, s, size);
if (write(fd, buf, RECORD_SIZE) == -1)
{
perror(NULL);
return -1;
}
return (0);
}
int record_write_blank(int fd, size_t count)
{
char buf[RECORD_SIZE] = {0};
while (count-- > 0)
{
if (write(fd, buf, RECORD_SIZE) == -1)
{
perror(NULL);
return -1;
}
}
return 0;
}
int record_read(int fd, char record[RECORD_SIZE])
{
int ret = read(fd, record, RECORD_SIZE);
if (ret == -1)
{
perror(NULL);
return -1;
}
if (ret != RECORD_SIZE)
return -1;
return 0;
}
static char g_record_blank[RECORD_SIZE] = {0};
bool record_is_blank(char record[RECORD_SIZE])
{
return memcmp(record, g_record_blank, RECORD_SIZE) == 0;
}
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