Added exit, _Exit, atexit.

[pdclib] / includes / stdlib.h

diff --git a/includes/stdlib.h b/includes/stdlib.h
index b48dae99da6211fc731d0c2dfecad4eaed0b06de..a83bd1e75fdea86f51b23f41cb86f60f725c7a76 100644 (file)
--- a/includes/stdlib.h
+++ b/includes/stdlib.h
@@ -16,10 +16,6 @@
 #include <_PDCLIB_int.h>
 #endif
 
-typedef struct _PDCLIB_div_t     div_t;
-typedef struct _PDCLIB_ldiv_t   ldiv_t;
-typedef struct _PDCLIB_lldiv_t lldiv_t;
-
 #ifndef _PDCLIB_SIZE_T_DEFINED
 #define _PDCLIB_SIZE_T_DEFINED _PDCLIB_SIZE_T_DEFINED
 typedef _PDCLIB_size_t size_t;
@@ -31,31 +27,72 @@ typedef _PDCLIB_size_t size_t;
 
 /* Numeric conversion functions */
 
-int atoi( const char * nptr );
-long int atol( const char * nptr );
-long long int atoll( const char * nptr );
-
+/* TODO: atof(), strtof(), strtod(), strtold() */
+
+/* Seperate the character array nptr into three parts: A (possibly empty)
+   sequence of whitespace characters, a character representation of an integer
+   to the given base, and trailing invalid characters (including the terminating
+   null character). If base is 0, assume it to be 10, unless the integer
+   representation starts with 0x / 0X (setting base to 16) or 0 (setting base to
+   8). If given, base can be anything from 0 to 36, using the 26 letters of the
+   base alphabet (both lowercase and uppercase) as digits 10 through 35.
+   The integer representation is then converted into the return type of the
+   function. It can start with a '+' or '-' sign. If the sign is '-', the result
+   of the conversion is negated.
+   If the conversion is successful, the converted value is returned. If endptr
+   is not a NULL pointer, a pointer to the first trailing invalid character is
+   returned in *endptr.
+   If no conversion could be performed, zero is returned (and nptr in *endptr,
+   if endptr is not a NULL pointer). If the converted value does not fit into
+   the return type, the functions return LONG_MIN, LONG_MAX, ULONG_MAX,
+   LLONG_MIN, LLONG_MAX, or ULLONG_MAX respectively, depending on the sign of
+   the integer representation and the return type, and errno is set to ERANGE.
+*/
 long int strtol( const char * _PDCLIB_restrict nptr, char * * _PDCLIB_restrict endptr, int base );
 long long int strtoll( const char * _PDCLIB_restrict nptr, char * * _PDCLIB_restrict endptr, int base );
 unsigned long int strtoul( const char * _PDCLIB_restrict nptr, char * * _PDCLIB_restrict endptr, int base );
 unsigned long long int strtoull( const char * _PDCLIB_restrict nptr, char * * _PDCLIB_restrict endptr, int base );
 
+/* These functions are the equivalent of (int)strtol( nptr, NULL, 10 ),
+   strtol( nptr, NULL, 10 ) and strtoll(nptr, NULL, 10 ) respectively, with the
+   exception that they do not have to handle overflow situations in any defined
+   way.
+   (PDCLib does not simply forward these to their strtox() equivalents, but
+   provides a simpler atox() function that saves a couple of tests and simply
+   continues with the conversion in case of overflow.)
+*/
+int atoi( const char * nptr );
+long int atol( const char * nptr );
+long long int atoll( const char * nptr );
+
 /* Pseudo-random sequence generation functions */
 
 extern unsigned long int _PDCLIB_seed;
 
 #define RAND_MAX 32767
 
+/* Returns the next number in a pseudo-random sequence, which is between 0 and
+   RAND_MAX.
+   (PDCLib uses the implementation suggested by the standard document, which is
+   next = next * 1103515245 + 12345; return (unsigned int)(next/65536) % 32768;)
+*/
 int rand();
+
+/* Initialize a new pseudo-random sequence with the starting seed. Same seeds
+   result in the same pseudo-random sequence. The default seed is 1.
+*/
 void srand( unsigned int seed );
 
 /* Memory management functions */
 
+void * malloc( size_t size );
+void free( void * ptr );
 
 /* Communication with the environment */
 
 void abort();
 void exit( int status );
+void _Exit( int status );
 
 /* Searching and sorting */
 
@@ -68,6 +105,10 @@ int abs( int j );
 long int labs( long int j );
 long long int llabs( long long int j );
 
+typedef struct _PDCLIB_div_t     div_t;
+typedef struct _PDCLIB_ldiv_t   ldiv_t;
+typedef struct _PDCLIB_lldiv_t lldiv_t;
+
 div_t div( int numer, int denom );
 ldiv_t ldiv( long int numer, long int denom );
 lldiv_t lldiv( long long int numer, long long int denom );