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(getline): When a search of already-read input for CRLF

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fails, store the fact that we've searched it and don't search it
again after reading more data.

(getline): When determining whether or not it's necessary
to grow the input buffer, take into account the null that's stored
at the end of already-read input in the buffer.
This commit is contained in:
Richard M. Stallman 1994-10-24 04:41:21 +00:00
parent c3a646c2ab
commit b6606ad821
1 changed files with 16 additions and 3 deletions
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19
lib-src/pop.c
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@ -1184,7 +1184,8 @@ getline (server)
#define GETLINE_ERROR "Error reading from server: "
int ret;
int search_offset = 0;
if (server->data)
{
char *cp = find_crlf (server->buffer + server->buffer_index);
@ -1208,6 +1209,14 @@ getline (server)
{
bcopy (server->buffer + server->buffer_index,
server->buffer, server->data);
/* Record the fact that we've searched the data already in
the buffer for a CRLF, so that when we search below, we
don't have to search the same data twice. There's a "-
1" here to account for the fact that the last character
of the data we have may be the CR of a CRLF pair, of
which we haven't read the second half yet, so we may have
to search it again when we read more data. */
search_offset = server->data - 1;
server->buffer_index = 0;
}
}
@ -1218,7 +1227,10 @@ getline (server)
while (1)
{
if (server->data == server->buffer_size)
/* There's a "- 1" here to leave room for the null that we put
at the end of the read data below. We put the null there so
that find_crlf knows where to stop when we call it. */
if (server->data == server->buffer_size - 1)
{
server->buffer_size += GETLINE_INCR;
server->buffer = realloc (server->buffer, server->buffer_size);
@ -1251,7 +1263,7 @@ getline (server)
server->data += ret;
server->buffer[server->data] = '\0';
cp = find_crlf (server->buffer);
cp = find_crlf (server->buffer + search_offset);
if (cp)
{
int data_used = (cp + 2) - server->buffer;
@ -1263,6 +1275,7 @@ getline (server)
fprintf (stderr, "<<< %s\n", server->buffer);
return (server->buffer);
}
search_offset += ret;
}
}