#ifndef _SCRATCHPAD_H
#define _SCRATCHPAD_H
/* Tim Hollebeek
*
* The data must also consist of zero terminated chunks, with lengths in the
* range 0 < len < 256. Longer things can be handled, but they're just
* malloc'ed.
*
* Designed to be used by the compile stack (if pointers get popped off due
* to errors, we don't have to worry about them b/c we'll reclaim the space
* when we throw away the scratchpad; this is another advantage), it could
* be used by other things as well.
*/
#define SCRATCHPAD_SIZE 4096
#define SDEBUG(x)
#define SDEBUG2(x)
#define SCRATCH_MAGIC ((unsigned char)0xbb)
typedef struct sp_block_s {
struct sp_block_s *next, *prev;
char block[2]; /* block[0] must be nonzero, usually SCRATCH_MAGIC */
} sp_block_t;
#define scratch_free_last() \
scr_tail = --scr_last; \
scr_last -= *scr_tail; \
while (!(*scr_last) && scr_tail != scr_last) { \
/* check if the one before was already freed */ \
scr_tail = --scr_last; \
scr_last -= *scr_tail; \
}
extern unsigned char *scr_last;
extern unsigned char *scr_tail;
extern unsigned char *scratch_end;
/*
* scratchpad.c
*/
void scratch_destroy (void);
char *scratch_copy (const char *);
char *scratch_alloc (int);
void scratch_free (char *);
char *scratch_join (char *, char *);
char *scratch_join2 (char *, char *);
char *scratch_realloc (char *, int);
char *scratch_copy_string (char *);
char *scratch_large_alloc (int);
#endif