1 files changed, 149 insertions, 0 deletions
diff --git a/fuzz/text-fuzzer.c b/fuzz/text-fuzzer.c
new file mode 100644
index 0000000..449e0dd
--- /dev/null
+++ b/fuzz/text-fuzzer.c
@@ -0,0 +1,149 @@
+#include <stddef.h>
+#include <stdbool.h>
+#include <string.h>
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+#include "fuzzer.h"
+#include "text.h"
+#include "text-util.h"
+#include "util.h"
+
+#ifndef BUFSIZ
+#define BUFSIZ 1024
+#endif
+
+typedef enum CmdStatus (*Cmd)(Text *txt, const char *cmd);
+
+static Mark mark = EMARK;
+
+static enum CmdStatus cmd_insert(Text *txt, const char *cmd) {
+	char data[BUFSIZ];
+	size_t pos;
+	if (sscanf(cmd, "%zu %s\n", &pos, data) != 2)
+		return CMD_ERR;
+	size_t len = strlen(data);
+	return text_insert(txt, pos, data, len);
+}
+
+static enum CmdStatus cmd_delete(Text *txt, const char *cmd) {
+	size_t pos, len;
+	if (sscanf(cmd, "%zu %zu", &pos, &len) != 2)
+		return CMD_ERR;
+	return text_delete(txt, pos, len);
+}
+
+static enum CmdStatus cmd_size(Text *txt, const char *cmd) {
+	printf("%zu bytes\n", text_size(txt));
+	return CMD_OK;
+}
+
+static enum CmdStatus cmd_snapshot(Text *txt, const char *cmd) {
+	text_snapshot(txt);
+	return CMD_OK;
+}
+
+static enum CmdStatus cmd_undo(Text *txt, const char *cmd) {
+	return text_undo(txt) != EPOS;
+}
+
+static enum CmdStatus cmd_redo(Text *txt, const char *cmd) {
+	return text_redo(txt) != EPOS;
+}
+
+static enum CmdStatus cmd_earlier(Text *txt, const char *cmd) {
+	return text_earlier(txt, 1) != EPOS;
+}
+
+static enum CmdStatus cmd_later(Text *txt, const char *cmd) {
+	return text_later(txt, 1) != EPOS;
+}
+
+static enum CmdStatus cmd_mark_set(Text *txt, const char *cmd) {
+	size_t pos;
+	if (sscanf(cmd, "%zu\n", &pos) != 1)
+		return CMD_ERR;
+	Mark m = text_mark_set(txt, pos);
+	if (m != EMARK)
+		mark = m;
+	return m != EMARK;
+}
+
+static enum CmdStatus cmd_mark_get(Text *txt, const char *cmd) {
+	size_t pos = text_mark_get(txt, mark);
+	if (pos != EPOS)
+		printf("%zu\n", pos);
+	return pos != EPOS;
+}
+
+static enum CmdStatus cmd_print(Text *txt, const char *cmd) {
+	size_t start = 0, size = text_size(txt), rem = size;
+	for (Iterator it = text_iterator_get(txt, start);
+	     rem > 0 && text_iterator_valid(&it);
+	     text_iterator_next(&it)) {
+		size_t prem = it.end - it.text;
+		if (prem > rem)
+			prem = rem;
+		if (fwrite(it.text, prem, 1, stdout) != 1)
+			return CMD_ERR;
+		rem -= prem;
+	}
+	if (rem != size)
+		puts("");
+	return rem == 0; 
+}
+
+static enum CmdStatus cmd_quit(Text *txt, const char *cmd) {
+	return CMD_QUIT;
+}
+
+static Cmd commands[] = {
+	['-'] = cmd_earlier,
+	['+'] = cmd_later,
+	['?'] = cmd_mark_get,
+	['='] = cmd_mark_set,
+	['#'] = cmd_size,
+	['d'] = cmd_delete,
+	['i'] = cmd_insert,
+	['p'] = cmd_print,
+	['q'] = cmd_quit,
+	['r'] = cmd_redo,
+	['s'] = cmd_snapshot,
+	['u'] = cmd_undo,
+};
+
+int main(int argc, char *argv[]) {
+	char line[BUFSIZ], *name = (argc == 1) ? NULL : argv[1];
+	Text *txt = text_load(name);
+	if (!name)
+		name = "-";
+	if (!txt) {
+		fprintf(stderr, "Failed to load text from `%s'\n", name);
+		return 1;
+	}
+
+	printf("Loaded %zu bytes from `%s'\n", text_size(txt), name);
+
+	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](txt, line+1);
+			printf("%s", cmd_status_msg[ret]);
+			if (ret == CMD_QUIT)
+				break;
+		} else {
+			puts("Invalid command");
+		}
+	}
+
+	text_free(txt);
+
+	return 0;
+}