text: 
  #ifndef __STRING_H__
  #define __STRING_H__
  
  /* String routines */
  
  void *memset(void *buf, int chr, unsigned int len);
  
  char *strcpy(char *dst, const char *src);
  
  char *strcat(char *dst, const char * src);
  
  int strcmp(const char *a,const char*b);
  
  int strlen(const char *a);
  
  #endif
  