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-rw-r--r--test/regression/buffer-discard.c67
1 files changed, 67 insertions, 0 deletions
diff --git a/test/regression/buffer-discard.c b/test/regression/buffer-discard.c
new file mode 100644
index 0000000..d3eefb8
--- a/dev/null
+++ b/test/regression/buffer-discard.c
@@ -0,0 +1,67 @@
+#include <stdio.h>
+#include <string.h>
+
+#include <parserutils/parserutils.h>
+#include <parserutils/utils/buffer.h>
+
+#include "utils/utils.h"
+
+#include "testutils.h"
+
+#define BUFF_LEN 2000
+
+int main(int argc, char **argv)
+{
+ uint8_t data[BUFF_LEN];
+ parserutils_buffer *buf;
+ int i;
+
+ UNUSED(argc);
+ UNUSED(argv);
+
+ assert(parserutils_buffer_create(&buf) == PARSERUTILS_OK);
+
+ /* Populate the data with '4's */
+ for (i = 0; i < BUFF_LEN; i++)
+ data[i] = '4';
+
+ assert(parserutils_buffer_append(buf, data, BUFF_LEN) ==
+ PARSERUTILS_OK);
+
+ /* Double the size, appending 'c's */
+ for (i = 0; i < BUFF_LEN; i++)
+ data[i] = 'c';
+
+ assert(parserutils_buffer_append(buf, data, BUFF_LEN) ==
+ PARSERUTILS_OK);
+ assert(buf->length == 2 * BUFF_LEN);
+
+ /* Now reduce the length by half */
+ /* Buffer length is all '4's now */
+ buf->length = BUFF_LEN;
+
+ /* Now discard half of the 4s from the middle of the buffer */
+ assert(parserutils_buffer_discard(buf, BUFF_LEN / 4, BUFF_LEN / 2) ==
+ PARSERUTILS_OK);
+
+ /* Now check that the length is what we expect */
+ assert(buf->length == BUFF_LEN / 2);
+
+ /* Now check that the buffer contains what we expect */
+ for (i = 0; i < BUFF_LEN / 2; i++)
+ assert(buf->data[i] == '4');
+
+ /* Now check that the space we allocated beyond the buffer length is
+ * as we expect, and not overwritten with 'c', which should be beyond
+ * what the buffer_ code is allowed to move. */
+ for (i = BUFF_LEN / 2; i < BUFF_LEN; i++)
+ assert(buf->data[i] != 'c');
+
+
+ assert(parserutils_buffer_destroy(buf) == PARSERUTILS_OK);
+
+ printf("PASS\n");
+
+ return 0;
+}
+