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/*
* alloc.h: safe wrappers around malloc, realloc, free, strdup
*/
#ifndef AGEDU_ALLOC_H
#define AGEDU_ALLOC_H
#include <stddef.h>
/*
* smalloc should guarantee to return a useful pointer.
*/
void *smalloc(size_t size);
/*
* srealloc should guaranteeably be able to realloc NULL
*/
void *srealloc(void *p, size_t size);
/*
* sfree should guaranteeably deal gracefully with freeing NULL
*/
void sfree(void *p);
/*
* dupstr is like strdup, but with the never-return-NULL property
* of smalloc (and also reliably defined in all environments :-)
*/
char *dupstr(const char *s);
/*
* dupfmt is a bit like printf, but does its own allocation and
* returns a dynamic string. It also supports a different (and
* much less featureful) set of format directives:
*
* - %D takes no argument, and gives the current date and time in
* a format suitable for an HTTP Date header
* - %d takes an int argument and formats it like normal %d (but
* doesn't support any of the configurability of standard
* printf)
* - %s takes a const char * and formats it like normal %s
* (again, no fine-tuning available)
* - %h takes a const char * but escapes it so that it's safe for
* HTML
* - %S takes an int followed by a const char *. If the int is
* zero, it behaves just like %s. If the int is nonzero, it
* transforms the string by stuffing a \r before every \n.
*/
char *dupfmt(const char *fmt, ...);
/*
* snew allocates one instance of a given type, and casts the
* result so as to type-check that you're assigning it to the
* right kind of pointer. Protects against allocation bugs
* involving allocating the wrong size of thing.
*/
#define snew(type) \
( (type *) smalloc (sizeof (type)) )
/*
* snewn allocates n instances of a given type, for arrays.
*/
#define snewn(number, type) \
( (type *) smalloc ((number) * sizeof (type)) )
/*
* sresize wraps realloc so that you specify the new number of
* elements and the type of the element, with the same type-
* checking advantages. Also type-checks the input pointer.
*/
#define sresize(array, number, type) \
( (void)sizeof((array)-(type *)0), \
(type *) srealloc ((array), (number) * sizeof (type)) )
#endif /* AGEDU_ALLOC_H */
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