/*
* __wt_getline --
* Get a line from a stream.
*
* Implementation of the POSIX getline or BSD fgetln functions (finding the
* function in a portable way is hard, it's simple enough to write it instead).
*
* Note: Unlike the standard getline calls, this function doesn't include the
* trailing newline character in the returned buffer and discards empty lines
* (so the caller's EOF marker is a returned line length of 0).
*/
int
__wt_getline(WT_SESSION_IMPL *session, WT_ITEM *buf, FILE *fp)
{
int c;
/*
* We always NUL-terminate the returned string (even if it's empty),
* make sure there's buffer space for a trailing NUL in all cases.
*/
WT_RET(__wt_buf_init(session, buf, 100));
while ((c = fgetc(fp)) != EOF) {
/* Leave space for a trailing NUL. */
WT_RET(__wt_buf_extend(session, buf, buf->size + 2));
if (c == '\n') {
if (buf->size == 0)
continue;
break;
}
((char *)buf->mem)[buf->size++] = (char)c;
}
if (c == EOF && ferror(fp))
WT_RET_MSG(session, __wt_errno(), "file read");
((char *)buf->mem)[buf->size] = '\0';
return (0);
}
/*
* __fstream_printf --
* ANSI C vfprintf.
*/
static int
__fstream_printf(
WT_SESSION_IMPL *session, WT_FSTREAM *fstr, const char *fmt, va_list ap)
{
WT_ITEM *buf;
va_list ap_copy;
size_t len, space;
char *p;
buf = &fstr->buf;
for (;;) {
va_copy(ap_copy, ap);
p = (char *)((uint8_t *)buf->mem + buf->size);
WT_ASSERT(session, buf->memsize >= buf->size);
space = buf->memsize - buf->size;
len = (size_t)vsnprintf(p, space, fmt, ap_copy);
va_end(ap_copy);
if (len < space) {
buf->size += len;
return (buf->size >= WT_STREAM_BUFSIZE ?
__wt_fflush(session, fstr) : 0);
}
WT_RET(__wt_buf_extend(session, buf, buf->size + len + 1));
}
}
/*
* __fstream_getline --
* Get a line from a stream.
*
* Implementation of the POSIX getline or BSD fgetln functions (finding the
* function in a portable way is hard, it's simple enough to write it instead).
*
* Note: Unlike the standard getline calls, this function doesn't include the
* trailing newline character in the returned buffer and discards empty lines
* (so the caller's EOF marker is a returned line length of 0).
*/
static int
__fstream_getline(WT_SESSION_IMPL *session, WT_FSTREAM *fstr, WT_ITEM *buf)
{
const char *p;
size_t len;
char c;
/*
* We always NUL-terminate the returned string (even if it's empty),
* make sure there's buffer space for a trailing NUL in all cases.
*/
WT_RET(__wt_buf_init(session, buf, 100));
for (;;) {
/* Check if we need to refill the buffer. */
if (WT_PTRDIFF(fstr->buf.data, fstr->buf.mem) >=
fstr->buf.size) {
len = WT_MIN(WT_STREAM_BUFSIZE,
(size_t)(fstr->size - fstr->off));
if (len == 0)
break; /* EOF */
WT_RET(__wt_buf_initsize(session, &fstr->buf, len));
WT_RET(__wt_read(
session, fstr->fh, fstr->off, len, fstr->buf.mem));
fstr->off += (wt_off_t)len;
}
c = *(p = fstr->buf.data);
fstr->buf.data = ++p;
/* Leave space for a trailing NUL. */
WT_RET(__wt_buf_extend(session, buf, buf->size + 2));
if (c == '\n') {
if (buf->size == 0)
continue;
break;
}
((char *)buf->mem)[buf->size++] = c;
}
((char *)buf->mem)[buf->size] = '\0';
return (0);
}
int
__wt_logop_col_put_pack(
WT_SESSION_IMPL *session, WT_ITEM *logrec,
uint32_t fileid, uint64_t recno, WT_ITEM *value)
{
const char *fmt = WT_UNCHECKED_STRING(IIIru);
size_t size;
uint32_t optype, recsize;
optype = WT_LOGOP_COL_PUT;
WT_RET(__wt_struct_size(session, &size, fmt,
optype, 0, fileid, recno, value));
__wt_struct_size_adjust(session, &size);
WT_RET(__wt_buf_extend(session, logrec, logrec->size + size));
recsize = (uint32_t)size;
WT_RET(__wt_struct_pack(session,
(uint8_t *)logrec->data + logrec->size, size, fmt,
optype, recsize, fileid, recno, value));
logrec->size += (uint32_t)size;
return (0);
}
int
__wt_logop_row_truncate_pack(
WT_SESSION_IMPL *session, WT_ITEM *logrec,
uint32_t fileid, WT_ITEM *start, WT_ITEM *stop, uint32_t mode)
{
const char *fmt = WT_UNCHECKED_STRING(IIIuuI);
size_t size;
uint32_t optype, recsize;
optype = WT_LOGOP_ROW_TRUNCATE;
WT_RET(__wt_struct_size(session, &size, fmt,
optype, 0, fileid, start, stop, mode));
__wt_struct_size_adjust(session, &size);
WT_RET(__wt_buf_extend(session, logrec, logrec->size + size));
recsize = (uint32_t)size;
WT_RET(__wt_struct_pack(session,
(uint8_t *)logrec->data + logrec->size, size, fmt,
optype, recsize, fileid, start, stop, mode));
logrec->size += (uint32_t)size;
return (0);
}