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#include <config.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <stdlib.h>
#include "iobuf.h"
static int
every_other_filter (void *opaque, int control,
iobuf_t chain, byte *buf, size_t *len)
{
(void) opaque;
if (control == IOBUFCTRL_DESC)
{
*(char **) buf = "every_other_filter";
}
if (control == IOBUFCTRL_UNDERFLOW)
{
int c = iobuf_readbyte (chain);
int c2;
if (c == -1)
c2 = -1;
else
c2 = iobuf_readbyte (chain);
// printf ("Discarding %d (%c); return %d (%c)\n", c, c, c2, c2);
if (c2 == -1)
{
*len = 0;
return -1;
}
*buf = c2;
*len = 1;
return 0;
}
return 0;
}
int
main (int argc, char *argv[])
{
(void) argc;
(void) argv;
/* A simple test to make sure filters work. We use a static buffer
and then add a filter in front of it that returns every other
character. */
{
char *content = "0123456789abcdefghijklm";
iobuf_t iobuf;
int c;
int n;
int rc;
iobuf = iobuf_temp_with_content (content, strlen (content));
rc = iobuf_push_filter (iobuf, every_other_filter, NULL);
assert (rc == 0);
n = 0;
while ((c = iobuf_readbyte (iobuf)) != -1)
{
// printf ("%d: %c\n", n + 1, (char) c);
assert (content[2 * n + 1] == c);
n ++;
}
// printf ("Got EOF after reading %d bytes (content: %d)\n",
// n, strlen (content));
assert (n == strlen (content) / 2);
iobuf_close (iobuf);
}
/* A simple test to check buffering. Make sure that when we add a
filter to a pipeline, any buffered data gets processed by the */
{
char *content = "0123456789abcdefghijklm";
iobuf_t iobuf;
int c;
int n;
int rc;
int i;
iobuf = iobuf_temp_with_content (content, strlen (content));
n = 0;
for (i = 0; i < 10; i ++)
{
c = iobuf_readbyte (iobuf);
assert (content[i] == c);
n ++;
}
rc = iobuf_push_filter (iobuf, every_other_filter, NULL);
assert (rc == 0);
while ((c = iobuf_readbyte (iobuf)) != -1)
{
// printf ("%d: %c\n", n + 1, (char) c);
assert (content[2 * (n - 5) + 1] == c);
n ++;
}
assert (n == 10 + (strlen (content) - 10) / 2);
}
/* A simple test to check that iobuf_read_line works. */
{
/* - 3 characters plus new line
- 4 characters plus new line
- 5 characters plus new line
- 5 characters, no new line
*/
char *content = "abc\ndefg\nhijkl\nmnopq";
iobuf_t iobuf;
byte *buffer;
unsigned size;
unsigned max_len;
int n;
iobuf = iobuf_temp_with_content (content, strlen(content));
/* We read a line with 3 characters plus a newline. If we
allocate a buffer that is 5 bytes long, then no reallocation
should be required. */
size = 5;
buffer = malloc (size);
assert (buffer);
max_len = 100;
n = iobuf_read_line (iobuf, &buffer, &size, &max_len);
assert (n == 4);
assert (strcmp (buffer, "abc\n") == 0);
assert (size == 5);
assert (max_len == 100);
free (buffer);
/* We now read a line with 4 characters plus a newline. This
requires 6 bytes of storage. We pass a buffer that is 5 bytes
large and we allow the buffer to be grown. */
size = 5;
buffer = malloc (size);
max_len = 100;
n = iobuf_read_line (iobuf, &buffer, &size, &max_len);
assert (n == 5);
assert (strcmp (buffer, "defg\n") == 0);
assert (size >= 6);
/* The string shouldn't have been truncated (max_len == 0). */
assert (max_len == 100);
free (buffer);
/* We now read a line with 5 characters plus a newline. This
requires 7 bytes of storage. We pass a buffer that is 5 bytes
large and we don't allow the buffer to be grown. */
size = 5;
buffer = malloc (size);
max_len = 5;
n = iobuf_read_line (iobuf, &buffer, &size, &max_len);
assert (n == 4);
/* Note: the string should still have a trailing \n. */
assert (strcmp (buffer, "hij\n") == 0);
assert (size == 5);
/* The string should have been truncated (max_len == 0). */
assert (max_len == 0);
free (buffer);
/* We now read a line with 6 characters without a newline. This
requires 7 bytes of storage. We pass a NULL buffer and we
don't allow the buffer to be grown larger than 5 bytes. */
size = 5;
buffer = NULL;
max_len = 5;
n = iobuf_read_line (iobuf, &buffer, &size, &max_len);
assert (n == 4);
/* Note: the string should still have a trailing \n. */
assert (strcmp (buffer, "mno\n") == 0);
assert (size == 5);
/* The string should have been truncated (max_len == 0). */
assert (max_len == 0);
free (buffer);
}
return 0;
}
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