1 files changed, 106 insertions, 0 deletions
diff --git a/test/fuzz/buffer-fuzzer.c b/test/fuzz/buffer-fuzzer.c
new file mode 100644
index 0000000..fea3ec8
--- /dev/null
+++ b/test/fuzz/buffer-fuzzer.c
@@ -0,0 +1,106 @@
+#include <stddef.h>
+#include <stdbool.h>
+#include <string.h>
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+#include "fuzzer.h"
+#include "buffer.h"
+#include "util.h"
+
+#ifndef BUFSIZ
+#define BUFSIZ 1024
+#endif
+
+typedef enum CmdStatus (*Cmd)(Buffer *buf, const char *cmd);
+
+static enum CmdStatus cmd_insert(Buffer *buf, const char *cmd) {
+	char data[BUFSIZ];
+	size_t pos;
+	if (sscanf(cmd, "%zu %s\n", &pos, data) != 2)
+		return CMD_ERR;
+	return buffer_insert0(buf, pos, data);
+}
+
+static enum CmdStatus cmd_set(Buffer *buf, const char *cmd) {
+	char data[BUFSIZ];
+	if (sscanf(cmd, "%s\n", data) != 1)
+		return CMD_ERR;
+	return buffer_put0(buf, data);
+}
+
+static enum CmdStatus cmd_delete(Buffer *buf, const char *cmd) {
+	size_t pos, len;
+	if (sscanf(cmd, "%zu %zu", &pos, &len) != 2)
+		return CMD_ERR;
+	return buffer_remove(buf, pos, len);
+}
+
+static enum CmdStatus cmd_clear(Buffer *buf, const char *cmd) {
+	buffer_clear(buf);
+	return CMD_OK;
+}
+
+static enum CmdStatus cmd_size(Buffer *buf, const char *cmd) {
+	printf("%zu bytes\n", buffer_length(buf));
+	return CMD_OK;
+}
+
+static enum CmdStatus cmd_capacity(Buffer *buf, const char *cmd) {
+	printf("%zu bytes\n", buffer_capacity(buf));
+	return CMD_OK;
+}
+
+static enum CmdStatus cmd_print(Buffer *buf, const char *cmd) {
+	size_t len = buffer_length(buf);
+	const char *data = buffer_content(buf);
+	if (data && fwrite(data, len, 1, stdout) != 1)
+		return CMD_ERR;
+	if (data)
+		puts("");
+	return CMD_OK;
+}
+
+static enum CmdStatus cmd_quit(Buffer *buf, const char *cmd) {
+	return CMD_QUIT;
+}
+
+static Cmd commands[] = {
+	['?'] = cmd_capacity,
+	['='] = cmd_set,
+	['#'] = cmd_size,
+	['c'] = cmd_clear,
+	['d'] = cmd_delete,
+	['i'] = cmd_insert,
+	['p'] = cmd_print,
+	['q'] = cmd_quit,
+};
+
+int main(int argc, char *argv[]) {
+	char line[BUFSIZ];
+	Buffer buf;
+	buffer_init(&buf);
+
+	for (;;) {
+		printf("> ");
+		if (!fgets(line, sizeof(line), stdin))
+			break;
+		if (!isatty(0))
+			printf("%s", line);
+		if (line[0] == '\n')
+			continue;
+		size_t idx = line[0];
+		if (idx < LENGTH(commands) && commands[idx]) {
+			enum CmdStatus ret = commands[idx](&buf, line+1);
+			printf("%s", cmd_status_msg[ret]);
+			if (ret == CMD_QUIT)
+				break;
+		} else {
+			puts("Invalid command");
+		}
+	}
+
+	buffer_release(&buf);
+
+	return 0;
+}