Rewrite librecrypt_add_algorithm to use string building functions

Signed-off-by: Mattias Andrée <m@maandree.se>

1 files changed, 62 insertions, 0 deletions

diff --git a/librecrypt_concat_memmove_.c b/librecrypt_concat_memmove_.c
new file mode 100644
index 0000000..d25ca44
--- /dev/null
+++ b/librecrypt_concat_memmove_.c
@@ -0,0 +1,62 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+#ifndef TEST
+
+
+extern inline void librecrypt_concat_memmove_(struct concat_state *state, const char *text, size_t len);
+
+
+#else
+
+
+int
+main(void)
+{
+	char buf[5];
+	struct concat_state state = {buf, sizeof(buf), 0u};
+
+	SET_UP_ALARM();
+	INIT_RESOURCE_TEST();
+
+	memset(buf, 'x', sizeof(buf));
+
+	librecrypt_concat_memmove_(&state, "abcdef", 6u);
+	assert(!memcmp(buf, "abcd\0", sizeof(buf)));
+	assert(state.buf == &buf[4u]);
+	assert(state.size == 1u);
+	assert(state.len == 6u);
+	librecrypt_concat_memmove_(&state, "z", 1u);
+	assert(!memcmp(buf, "abcd\0", sizeof(buf)));
+	assert(state.len == 7u);
+
+	state = (struct concat_state){NULL, 0u, 0u};
+	librecrypt_concat_memmove_(&state, "abc", 3u);
+	assert(state.len == 3u);
+
+	buf[0u] = 'a';
+	buf[1u] = 'b';
+	buf[2u] = 'c';
+	buf[3u] = 'd';
+	buf[4u] = 'e';
+	state = (struct concat_state){buf, 5u, 0u};
+	librecrypt_concat_memmove_(&state, buf, 4u);
+	assert(!memcmp(buf, "abcd", 5u));
+	assert(state.len == 4u);
+
+	buf[0u] = 'a';
+	buf[1u] = 'b';
+	buf[2u] = 'c';
+	buf[3u] = 'd';
+	buf[4u] = 'e';
+	state = (struct concat_state){buf, 5u, 0u};
+	librecrypt_concat_memmove_(&state, &buf[1u], 3u);
+	fprintf(stderr, "[[%s]]\n", buf);
+	assert(!memcmp(buf, "bcd", 3u));
+	assert(state.len == 3u);
+
+	STOP_RESOURCE_TEST();
+	return 0;
+}
+
+
+#endif