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#ifndef AC_KGRAPH_H
#define AC_KGRAPH_H
#include <stdint.h>
#include <stdlib.h>
#include "khash.h"
#include "kbtree.h"
typedef unsigned kgint_t;
#define kgraph_t(name) kh_##name##_t
#define __KG_BASIC(name, SCOPE, vertex_t, arc_t, ehn) \
SCOPE kgraph_t(name) *kg_init_##name(void) { return kh_init(name); } \
SCOPE void kg_destroy_##name(kgraph_t(name) *g) { \
khint_t k; \
if (g == 0) return; \
for (k = kh_begin(g); k != kh_end(g); ++k) \
if (kh_exist(g, k)) kh_destroy(ehn, kh_val(g, k)._arc); \
kh_destroy(name, g); \
} \
SCOPE vertex_t *kg_get_v_##name(kgraph_t(name) *g, kgint_t v) { \
khint_t k = kh_get(name, g, v); \
return k == kh_end(g)? 0 : &kh_val(g, k); \
} \
SCOPE vertex_t *kg_put_v_##name(kgraph_t(name) *g, kgint_t v, int *absent) { \
khint_t k; \
k = kh_put(name, g, v, absent); \
if (*absent) kh_val(g, k)._arc = kh_init(ehn); \
return &kh_val(g, k); \
} \
SCOPE void kg_put_a_##name(kgraph_t(name) *g, kgint_t vbeg, kgint_t vend, int dir, arc_t **pb, arc_t **pe) { \
vertex_t *p; \
khint_t k; \
int absent; \
p = kg_put_v_##name(g, vbeg, &absent); \
k = kh_put(ehn, p->_arc, vend<<2|dir, &absent); \
*pb = &kh_val(p->_arc, k); \
p = kg_put_v_##name(g, vend, &absent); \
k = kh_put(ehn, p->_arc, vbeg<<2|(~dir&3), &absent); \
*pe = &kh_val(p->_arc, k); \
} \
SCOPE vertex_t *kg_del_v_##name(kgraph_t(name) *g, kgint_t v) { \
khint_t k, k0, k2, k3; \
khash_t(ehn) *h; \
k0 = k = kh_get(name, g, v); \
if (k == kh_end(g)) return 0; /* not present in the graph */ \
h = kh_val(g, k)._arc; \
for (k = kh_begin(h); k != kh_end(h); ++k) /* remove v from its neighbors */ \
if (kh_exist(h, k)) { \
k2 = kh_get(name, g, kh_key(h, k)>>2); \
/* assert(k2 != kh_end(g)); */ \
k3 = kh_get(ehn, kh_val(g, k2)._arc, v<<2|(~kh_key(h, k)&3)); \
/* assert(k3 != kh_end(kh_val(g, k2)._arc)); */ \
kh_del(ehn, kh_val(g, k2)._arc, k3); \
} \
kh_destroy(ehn, h); \
kh_del(name, g, k0); \
return &kh_val(g, k0); \
}
#define KGRAPH_PRINT(name, SCOPE) \
SCOPE void kg_print_##name(kgraph_t(name) *g) { \
khint_t k, k2; \
for (k = kh_begin(g); k != kh_end(g); ++k) \
if (kh_exist(g, k)) { \
printf("v %u\n", kh_key(g, k)); \
for (k2 = kh_begin(kh_val(g, k)._arc); k2 != kh_end(kh_val(g, k)._arc); ++k2) \
if (kh_exist(kh_val(g, k)._arc, k2) && kh_key(g, k) < kh_key(kh_val(g, k)._arc, k2)>>2) \
printf("a %u%c%c%u\n", kh_key(g, k), "><"[kh_key(kh_val(g, k)._arc, k2)>>1&1], \
"><"[kh_key(kh_val(g, k)._arc, k2)&1], kh_key(kh_val(g, k)._arc, k2)>>2); \
} \
}
#define KGRAPH_INIT(name, SCOPE, vertex_t, arc_t, ehn) \
KHASH_INIT2(name, SCOPE, kgint_t, vertex_t, 1, kh_int_hash_func, kh_int_hash_equal) \
__KG_BASIC(name, SCOPE, vertex_t, arc_t, ehn)
#endif
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