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/*
* ptr.h -- type definitions for ptr (aka "pointer"), a char* replacement
* which allows for '\0' inside a string.
*/
#ifndef _PTR_H_
#define _PTR_H_
typedef struct s_ptr {
int len;
int max;
} _ptr;
typedef _ptr * ptr;
#define sizeofptr ((int)(1 + sizeof(_ptr)))
/* the + 0 below is to prohibit using the macros for altering the ptr */
#define ptrlen(p) ((p)->len + 0)
#define ptrmax(p) ((p)->max + 0)
#define ptrdata(p) ((char *)((ptr)(p) + 1))
/* if p is a valid (ptr), ptrdata(p) is guaranteed to be a valid (char *) */
ptr ptrnew __P ((int max));
ptr ptrdup2 __P ((ptr src, int newmax));
ptr ptrdup __P ((ptr src));
void ptrdel __P ((ptr p));
void ptrzero __P ((ptr p));
void ptrshrink __P ((ptr p, int len));
void ptrtrunc __P ((ptr p, int len));
ptr ptrpad __P ((ptr p, int len));
ptr ptrsetlen __P ((ptr p, int len));
ptr ptrcpy __P ((ptr dst, ptr src));
ptr ptrmcpy __P ((ptr dst, char *src, int len));
ptr ptrcat __P ((ptr dst, ptr src));
ptr ptrmcat __P ((ptr dst, char *src, int len));
ptr __ptrcat __P ((ptr dst, char *src, int len, int shrink));
ptr __ptrmcpy __P ((ptr dst, char *src, int len, int shrink));
int ptrcmp __P ((ptr p, ptr q));
int ptrmcmp __P ((ptr p, char *q, int lenq));
char *ptrchr __P ((ptr p, char c));
char *ptrrchr __P ((ptr p, char c));
char *ptrfind __P ((ptr p, ptr q));
char *ptrmfind __P ((ptr p, char *q, int lenq));
char *ptrchrs __P ((ptr p, ptr q));
char *ptrmchrs __P ((ptr p, char *q, int lenq));
char *ptrrchrs __P ((ptr p, ptr q));
char *ptrmrchrs __P ((ptr p, char *q, int lenq));
char *memchrs __P ((char *p, int lenp, char *q, int lenq));
char *memrchrs __P ((char *p, int lenp, char *q, int lenq));
#ifdef _GNU_SOURCE
# define memfind memmem
#else
char *memfind __P ((char *hay, int haylen, char *needle, int needlelen));
/* TODO: watch memrchr, it is defined differently here than under _GNU_SOURCE,
* so it could cause bizarre results if a module makes use of a library that
* uses it */
char *memrchr __P ((char *p, int lenp, char c));
#endif
#endif /* _PTR_H_ */
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