src/include/stdlib.h

   1 #ifndef STDLIB_H
   2 #define STDLIB_H
   3
   4 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
   5
   6 #include <stdint.h>
   7 #include <assert.h>
   8
   9 /*****************************************************************************
  10  *
  11  * Numeric parsing
  12  *
  13  ****************************************************************************
  14  */
  15
  16 extern unsigned long strtoul ( const char *string, char **endp, int base );
  17 extern unsigned long long strtoull ( const char *string, char **endp,
  18                                      int base );
  19
  20 /*****************************************************************************
  21  *
  22  * Memory allocation
  23  *
  24  ****************************************************************************
  25  */
  26
  27 extern void * __malloc malloc ( size_t size );
  28 extern void * realloc ( void *old_ptr, size_t new_size );
  29 extern void free ( void *ptr );
  30 extern void * __malloc zalloc ( size_t len );
  31
  32 /**
  33  * Allocate cleared memory
  34  *
  35  * @v nmemb             Number of members
  36  * @v size              Size of each member
  37  * @ret ptr             Allocated memory
  38  *
  39  * Allocate memory as per malloc(), and zero it.
  40  *
  41  * This is implemented as a static inline, with the body of the
  42  * function in zalloc(), since in most cases @c nmemb will be 1 and
  43  * doing the multiply is just wasteful.
  44  */
  45 static inline void * __malloc calloc ( size_t nmemb, size_t size ) {
  46         return zalloc ( nmemb * size );
  47 }
  48
  49 /*****************************************************************************
  50  *
  51  * Random number generation
  52  *
  53  ****************************************************************************
  54  */
  55
  56 extern long int random ( void );
  57 extern void srandom ( unsigned int seed );
  58
  59 static inline int rand ( void ) {
  60         return random();
  61 }
  62
  63 static inline void srand ( unsigned int seed ) {
  64         srandom ( seed );
  65 }
  66
  67 /*****************************************************************************
  68  *
  69  * Miscellaneous
  70  *
  71  ****************************************************************************
  72  */
  73
  74 static inline __attribute__ (( always_inline )) int abs ( int value ) {
  75         return __builtin_abs ( value );
  76 }
  77
  78 extern int system ( const char *command );
  79 extern __asmcall int main ( void );
  80
  81 #endif /* STDLIB_H */