Function movements

* string functions mstr*() are moved to string_utils.c
* allocation wrappers are moved to utils.h
* printf_* functions are moved to log.h

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>

src/string_utils.h

@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: MPL-2.0
+// Copyright (c) Yuxuan Shui <yshuiv7@gmail.com>
+#pragma once
+#include <ctype.h>
+#include <stddef.h>
+
+#define mstrncmp(s1, s2) strncmp((s1), (s2), strlen(s1))
+
+char *mstrcpy(const char *src);
+char *mstrncpy(const char *src, unsigned len);
+char *mstrjoin(const char *src1, const char *src2);
+char *
+mstrjoin3(const char *src1, const char *src2, const char *src3);
+void mstrextend(char **psrc1, const char *src2);
+
+static inline const char *
+skip_space_const(const char *src) {
+  if (!src)
+    return NULL;
+  while (*src && isspace(*src))
+    src++;
+  return src;
+}
+
+static inline char *
+skip_space_mut(char *src) {
+  if (!src)
+    return NULL;
+  while (*src && isspace(*src))
+    src++;
+  return src;
+}
+
+#define skip_space(x) _Generic((x), \
+  char *: skip_space_mut, \
+  const char *: skip_space_const \
+)(x)