refactor(lsm): allow modules to import other internal header files

lsm/src/str/lsm_str.c

@@ -0,0 +1,61 @@
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "lsm.h"
+#include "lsm/str_internal.h"
+
+lsm_error lsm_str_init_zero(lsm_str **ptr) {
+  lsm_str *str = calloc(1, sizeof(lsm_str));
+
+  if (str == NULL) {
+    return lsm_error_failed_alloc;
+  }
+
+  *ptr = str;
+
+  return lsm_error_ok;
+}
+
+void lsm_str_init_prealloc(lsm_str *str, char *s) {
+  str->len = strlen(s);
+
+  if (str->len <= 8) {
+    memcpy(str->data.val, s, str->len);
+    free(s);
+  } else {
+    str->data.ptr = s;
+  }
+}
+
+lsm_error lsm_str_init(lsm_str **ptr, char *s) {
+  lsm_str *str = calloc(1, sizeof(lsm_str));
+
+  if (str == NULL) {
+    return lsm_error_failed_alloc;
+  }
+
+  lsm_str_init_prealloc(str, s);
+
+  *ptr = str;
+
+  return lsm_error_ok;
+}
+
+void lsm_str_zero(lsm_str *str) {
+  if (str->len > 8) {
+    free(str->data.ptr);
+  }
+
+  str->len = 0;
+}
+
+void lsm_str_free(lsm_str *str) {
+  if (str->len > 8) {
+    free(str->data.ptr);
+  }
+
+  free(str);
+}
+
+uint64_t lsm_str_len(lsm_str *str) { return str->len; }