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.c

@@ -0,0 +1,63 @@
+#include <string.h>
+
+#include "string_utils.h"
+#include "utils.h"
+/**
+ * Allocate the space and copy a string.
+ */
+char *mstrcpy(const char *src) {
+  char *str = cmalloc(strlen(src) + 1, char);
+
+  strcpy(str, src);
+
+  return str;
+}
+
+/**
+ * Allocate the space and copy a string.
+ */
+char *mstrncpy(const char *src, unsigned len) {
+  char *str = cmalloc(len + 1, char);
+
+  strncpy(str, src, len);
+  str[len] = '\0';
+
+  return str;
+}
+
+/**
+ * Allocate the space and join two strings.
+ */
+char *mstrjoin(const char *src1, const char *src2) {
+  char *str = cmalloc(strlen(src1) + strlen(src2) + 1, char);
+
+  strcpy(str, src1);
+  strcat(str, src2);
+
+  return str;
+}
+
+/**
+ * Allocate the space and join two strings;
+ */
+char *
+mstrjoin3(const char *src1, const char *src2, const char *src3) {
+  char *str = cmalloc(strlen(src1) + strlen(src2)
+        + strlen(src3) + 1, char);
+
+  strcpy(str, src1);
+  strcat(str, src2);
+  strcat(str, src3);
+
+  return str;
+}
+
+/**
+ * Concatenate a string on heap with another string.
+ */
+void mstrextend(char **psrc1, const char *src2) {
+  *psrc1 = crealloc(*psrc1, (*psrc1 ? strlen(*psrc1): 0) + strlen(src2) + 1,
+      char);
+
+  strcat(*psrc1, src2);
+}