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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;
int signature;
} _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(int max);
ptr ptrdup2(ptr src, int newmax);
ptr ptrdup(ptr src);
#define PTR_SIG 91887
#define ptrdel(x) _ptrdel(x);x=(ptr)0;
void _ptrdel(ptr p);
void ptrzero(ptr p);
void ptrshrink(ptr p, int len);
void ptrtrunc(ptr p, int len);
ptr ptrpad(ptr p, int len);
ptr ptrsetlen(ptr p, int len);
ptr ptrcpy(ptr dst, ptr src);
ptr ptrmcpy(ptr dst, char *src, int len);
ptr ptrcat(ptr dst, ptr src);
ptr ptrmcat(ptr dst, char *src, int len);
ptr __ptrcat(ptr dst, char *src, int len, int shrink);
ptr __ptrmcpy(ptr dst, char *src, int len, int shrink);
int ptrcmp(ptr p, ptr q);
int ptrmcmp(ptr p, char *q, int lenq);
char *ptrchr(ptr p, char c);
char *ptrrchr(ptr p, char c);
char *ptrfind(ptr p, ptr q);
char *ptrmfind(ptr p, char *q, int lenq);
char *ptrchrs(ptr p, ptr q);
char *ptrmchrs(ptr p, char *q, int lenq);
char *ptrrchrs(ptr p, ptr q);
char *ptrmrchrs(ptr p, char *q, int lenq);
char *memchrs(char *p, int lenp, char *q, int lenq);
char *memrchrs(char *p, int lenp, char *q, int lenq);
#ifdef _GNU_SOURCE
# define memfind memmem
#else
char *memfind(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(char *p, int lenp, char c);
#endif
#endif /* _PTR_H_ */
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