/* [ʞ] src/type.h
* ~ lexi hale <lexi@hale.su>
* 🄯 AGPLv3
* ? miscellaneous useful types & macros
*/
#pragma once
#define _strDynSz(a) \
__builtin_choose_expr( \
/* if */ __builtin_types_compatible_p(typeof(a), pstr), \
/* then */ ((pstr*)&(a))->sz, \
/* else */ strlen(*(char const**)&(a)))
#define _strDynMem(a) \
__builtin_choose_expr( \
/* if */ __builtin_types_compatible_p(typeof(a), pstr), \
/* then */ ((pstr*)&(a))->v, \
/* else */ *(char**)&(a))
#define _pstrOf(a) ((pstr){.v=_strDynMem(a), .sz=_strDynSz(a)})
#define _array(t) struct {t* v; size_t sz;}
typedef _array(char) pstr;
#define _pstrLit(a) ((pstr){.v=(a),.sz=sizeof(a)-1})
#define _drop(x) { \
if (x.v) { \
_free (x.v); \
x.v = nullptr; \
x.sz = 0; \
} \
}
#define _new(T, n) ((T){ \
.v = _alloc( typeof( *((typeof(T)) {}).v ), n), \
.sz = n, \
})
static inline pstr
pstrDup(pstr p) {
if (p.v == nullptr) return p;
if (p.sz == 0) p.sz = strlen(p.v);
auto n = _new(pstr, p.sz + 1);
memcpy(n.v, p.v, p.sz);
n.v[p.sz] = 0;
n.sz = p.sz;
return n;
}