Fix asan errors

It found some really nasty ones :)

4 files changed, 21 insertions, 4 deletions

diff --git a/src/dged/buffer.c b/src/dged/buffer.c
index d25297f..ab86dc6 100644
--- a/src/dged/buffer.c
+++ b/src/dged/buffer.c
@@ -837,6 +837,9 @@ void buffer_find(struct buffer *buffer, const char *pattern,
 
   *matches = VEC_ENTRIES(&data.matches);
   *nmatches = VEC_SIZE(&data.matches);
+
+  VEC_DISOWN_ENTRIES(&data.matches);
+  VEC_DESTROY(&data.matches);
 }
 
 struct location buffer_copy(struct buffer *buffer, struct region region) {
diff --git a/src/dged/settings.c b/src/dged/settings.c
index df3af1c..3dc92ef 100644
--- a/src/dged/settings.c
+++ b/src/dged/settings.c
@@ -63,7 +63,6 @@ struct setting *settings_get(const char *path) {
 void settings_get_prefix(const char *prefix, struct setting **settings_out[],
                          uint32_t *nsettings_out) {
 
-  uint32_t capacity = 16;
   VEC(struct setting *) res;
   VEC_INIT(&res, 16);
   HASHMAP_FOR_EACH(&g_settings.settings, struct setting_entry * entry) {
@@ -75,6 +74,9 @@ void settings_get_prefix(const char *prefix, struct setting **settings_out[],
 
   *nsettings_out = VEC_SIZE(&res);
   *settings_out = VEC_ENTRIES(&res);
+
+  VEC_DISOWN_ENTRIES(&res);
+  VEC_DESTROY(&res);
 }
 
 void settings_set(const char *path, struct setting_value value) {
@@ -194,13 +196,18 @@ static int32_t parse_toml(struct parser *state, char **errmsgs[]) {
     free(curkey);
   }
 
+  uint32_t ret = 0;
   if (!VEC_EMPTY(&errs)) {
     *errmsgs = VEC_ENTRIES(&errs);
+    ret = VEC_SIZE(&errs);
+
+    VEC_DISOWN_ENTRIES(&errs);
+    VEC_DESTROY(&errs);
   } else {
     *errmsgs = NULL;
     VEC_DESTROY(&errs);
   }
-  return VEC_SIZE(&errs);
+  return ret;
 }
 
 struct str_cursor {
@@ -272,7 +279,7 @@ static size_t get_bytes_from_file(size_t nbytes, uint8_t *buf, void *userdata) {
   memcpy(buf, r->buffer, to_read);
 
   r->buflen -= to_read;
-  memcpy(r->buffer, r->buffer + to_read, r->buflen);
+  memmove(r->buffer, r->buffer + to_read, r->buflen);
   return to_read;
 }
 
diff --git a/src/dged/text.c b/src/dged/text.c
index 0a92933..82c49bc 100644
--- a/src/dged/text.c
+++ b/src/dged/text.c
@@ -77,9 +77,14 @@ void text_clear(struct text *text) {
 
 // given `char_idx` as a character index, return the byte index
 uint32_t charidx_to_byteidx(struct line *line, uint32_t char_idx) {
+  if (line->nchars == 0) {
+    return 0;
+  }
+
   if (char_idx > line->nchars) {
-    return line->nbytes;
+    return line->nbytes - 1;
   }
+
   return utf8_nbytes(line->data, line->nbytes, char_idx);
 }
 
diff --git a/src/dged/vec.h b/src/dged/vec.h
index 8b17fa5..929c8d5 100644
--- a/src/dged/vec.h
+++ b/src/dged/vec.h
@@ -17,6 +17,8 @@
   (vec)->capacity = initial_capacity;                                          \
   (vec)->nentries = 0;
 
+#define VEC_DISOWN_ENTRIES(vec) (vec)->entries = NULL;
+
 #define VEC_DESTROY(vec)                                                       \
   free((vec)->temp);                                                           \
   free((vec)->entries);                                                        \