Espresso 0.0.1a

lib/string.c

@@ -1,6 +1,8 @@
+#include <stdlib.h>
+#include <vector_extentions/sse.h>
+
 #include <string.h>
 
-#include <vector_extentions/sse.h>
 
 extern int16_t sse_initialized;
 
@@ -77,6 +79,82 @@ void strcat(char *dest, const char *src)
     *end = '\0';
 }
 
+char* strdup(const char* s)
+{
+  if (!s)
+  {
+    return NULL;
+  }
+
+  size_t len = strlen(s);
+  char* copy = (char*)malloc(len + 1);
+
+  if (!copy)
+  {
+    return NULL;
+  }
+
+  memcpy(copy, s, len);
+  copy[len] = '\0';
+
+  return copy;
+}
+
+char* strtok(char* str, const char* delim)
+{
+  static char* next_token = NULL;
+
+  if (str != NULL)
+  {
+    next_token = str;
+  }
+  else if (next_token == NULL)
+  {
+    return NULL;
+  }
+
+  while (*next_token && strchr(delim, *next_token))
+  {
+    next_token++;
+  }
+
+  if (*next_token == '\0')
+  {
+    return NULL;
+  }
+
+  char* token_start = next_token;
+
+  while (*next_token && !strchr(delim, *next_token))
+  {
+    next_token++;
+  }
+
+  if (*next_token)
+  {
+    *next_token = '\0';
+    next_token++;
+  }
+
+  return token_start;
+}
+
+char* strchr(const char* s, int c)
+{
+  while (*s)
+  {
+      if (*s == (char)c)
+      {
+        return (char*)s;
+      }
+      s++;
+  }
+
+  return NULL;
+}
+
+
+
 void *memset(void *dst, char c, uint32_t n)
 {
   char *temp = dst;