From 58daab21cd043e1dc37024a7f99b396788372918 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sat, 9 Mar 2024 14:19:48 +0100
Subject: Merging upstream version 1.44.3.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 web/server/h2o/libh2o/deps/klib/kgraph.h | 79 ++++++++++++++++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 web/server/h2o/libh2o/deps/klib/kgraph.h

(limited to 'web/server/h2o/libh2o/deps/klib/kgraph.h')

diff --git a/web/server/h2o/libh2o/deps/klib/kgraph.h b/web/server/h2o/libh2o/deps/klib/kgraph.h
new file mode 100644
index 000000000..af008ef7e
--- /dev/null
+++ b/web/server/h2o/libh2o/deps/klib/kgraph.h
@@ -0,0 +1,79 @@
+#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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