int write_file(int f,char *buf,size_t len)
{
int ret = 0;
if (!sparse_files) {
return write(f,buf,len);
}
while (len>0) {
int len1 = MIN(len, SPARSE_WRITE_SIZE);
int r1 = write_sparse(f, buf, len1);
if (r1 <= 0) {
if (ret > 0) return ret;
return r1;
}
len -= r1;
buf += r1;
ret += r1;
}
return ret;
}
/* write_file does not allow incomplete writes. It loops internally
* until len bytes are written or errno is set. Note that use_seek and
* offset are only used in sparse processing (see write_sparse()). */
int write_file(int f, int use_seek, OFF_T offset, const char *buf, int len)
{
int ret = 0;
while (len > 0) {
int r1;
if (sparse_files > 0) {
int len1 = MIN(len, SPARSE_WRITE_SIZE);
r1 = write_sparse(f, use_seek, offset, buf, len1);
offset += r1;
} else {
if (!wf_writeBuf) {
wf_writeBufSize = WRITE_SIZE * 8;
wf_writeBufCnt = 0;
wf_writeBuf = new_array(char, wf_writeBufSize);
if (!wf_writeBuf)
out_of_memory("write_file");
}
r1 = (int)MIN((size_t)len, wf_writeBufSize - wf_writeBufCnt);
if (r1) {
memcpy(wf_writeBuf + wf_writeBufCnt, buf, r1);
wf_writeBufCnt += r1;
}
if (wf_writeBufCnt == wf_writeBufSize) {
if (flush_write_file(f) < 0)
return -1;
if (!r1 && len)
continue;
}
}
if (r1 <= 0) {
if (ret > 0)
return ret;
return r1;
}
len -= r1;
buf += r1;
ret += r1;
}