commit 60af694fd1f413eac9c275fe53639f9b51e2a71e
parent 764c1a14ee02adf8ffdb13c278a4965b07e63abb
Author: Christian Grothoff <christian@grothoff.org>
Date: Thu, 8 Nov 2012 21:28:35 +0000
-include tsearch.h only where needed, use local version if OS does not support it
Diffstat:
4 files changed, 173 insertions(+), 0 deletions(-)
diff --git a/src/daemon/Makefile.am b/src/daemon/Makefile.am
@@ -29,6 +29,11 @@ if USE_COVERAGE
AM_CFLAGS = --coverage
endif
+if !HAVE_TSEARCH
+libmicrohttpd_la_SOURCES += \
+ tsearch.c tsearch.h
+endif
+
if HAVE_POSTPROCESSOR
libmicrohttpd_la_SOURCES += \
postprocessor.c
diff --git a/src/daemon/daemon.c b/src/daemon/daemon.c
@@ -31,6 +31,12 @@
#include "memorypool.h"
#include <limits.h>
+#if HAVE_SEARCH_H
+#include <search.h>
+#else
+#include "tsearch.h"
+#endif
+
#if HTTPS_SUPPORT
#include "connection_https.h"
#include <gnutls/gnutls.h>
diff --git a/src/daemon/tsearch.c b/src/daemon/tsearch.c
@@ -0,0 +1,123 @@
+/* $NetBSD: tsearch.c,v 1.3 1999/09/16 11:45:37 lukem Exp $ */
+
+/*
+ * Tree search generalized from Knuth (6.2.2) Algorithm T just like
+ * the AT&T man page says.
+ *
+ * The node_t structure is for internal use only, lint doesn't grok it.
+ *
+ * Written by reading the System V Interface Definition, not the code.
+ *
+ * Totally public domain.
+ */
+
+#include <sys/cdefs.h>
+#define _SEARCH_PRIVATE
+#include <tsearch.h>
+#include <stdlib.h>
+
+/* find or insert datum into search tree */
+void *
+tsearch(vkey, vrootp, compar)
+ const void *vkey; /* key to be located */
+ void **vrootp; /* address of tree root */
+ int (*compar)(const void *, const void *);
+{
+ node_t *q;
+ node_t **rootp = (node_t **)vrootp;
+
+ if (rootp == NULL)
+ return NULL;
+
+ while (*rootp != NULL) { /* Knuth's T1: */
+ int r;
+
+ if ((r = (*compar)(vkey, (*rootp)->key)) == 0) /* T2: */
+ return *rootp; /* we found it! */
+
+ rootp = (r < 0) ?
+ &(*rootp)->llink : /* T3: follow left branch */
+ &(*rootp)->rlink; /* T4: follow right branch */
+ }
+
+ q = malloc(sizeof(node_t)); /* T5: key not found */
+ if (q != 0) { /* make new node */
+ *rootp = q; /* link new node to old */
+ /* LINTED const castaway ok */
+ q->key = (void *)vkey; /* initialize new node */
+ q->llink = q->rlink = NULL;
+ }
+ return q;
+}
+
+/* find a node, or return 0 */
+void *
+tfind(vkey, vrootp, compar)
+ const void *vkey; /* key to be found */
+ void * const *vrootp; /* address of the tree root */
+ int (*compar)(const void *, const void *);
+{
+ node_t **rootp = (node_t **)vrootp;
+
+ if (rootp == NULL)
+ return NULL;
+
+ while (*rootp != NULL) { /* T1: */
+ int r;
+
+ if ((r = (*compar)(vkey, (*rootp)->key)) == 0) /* T2: */
+ return *rootp; /* key found */
+ rootp = (r < 0) ?
+ &(*rootp)->llink : /* T3: follow left branch */
+ &(*rootp)->rlink; /* T4: follow right branch */
+ }
+ return NULL;
+}
+
+/*
+ * delete node with given key
+ *
+ * vkey: key to be deleted
+ * vrootp: address of the root of the tree
+ * compar: function to carry out node comparisons
+ */
+void *
+tdelete(const void * __restrict vkey, void ** __restrict vrootp,
+ int (*compar)(const void *, const void *))
+{
+ node_t **rootp = (node_t **)vrootp;
+ node_t *p, *q, *r;
+ int cmp;
+
+ if (rootp == NULL || (p = *rootp) == NULL)
+ return NULL;
+
+ while ((cmp = (*compar)(vkey, (*rootp)->key)) != 0) {
+ p = *rootp;
+ rootp = (cmp < 0) ?
+ &(*rootp)->llink : /* follow llink branch */
+ &(*rootp)->rlink; /* follow rlink branch */
+ if (*rootp == NULL)
+ return NULL; /* key not found */
+ }
+ r = (*rootp)->rlink; /* D1: */
+ if ((q = (*rootp)->llink) == NULL) /* Left NULL? */
+ q = r;
+ else if (r != NULL) { /* Right link is NULL? */
+ if (r->llink == NULL) { /* D2: Find successor */
+ r->llink = q;
+ q = r;
+ } else { /* D3: Find NULL link */
+ for (q = r->llink; q->llink != NULL; q = r->llink)
+ r = q;
+ r->llink = q->rlink;
+ q->llink = (*rootp)->llink;
+ q->rlink = (*rootp)->rlink;
+ }
+ }
+ free(*rootp); /* D4: Free node */
+ *rootp = q; /* link parent to new node */
+ return p;
+}
+
+/* end of tsearch.c */
diff --git a/src/daemon/tsearch.h b/src/daemon/tsearch.h
@@ -0,0 +1,39 @@
+/*-
+ * Written by J.T. Conklin <jtc@netbsd.org>
+ * Public domain.
+ *
+ * $NetBSD: search.h,v 1.12 1999/02/22 10:34:28 christos Exp $
+ * $FreeBSD: release/9.0.0/include/search.h 105250 2002-10-16 14:29:23Z robert $
+ */
+
+#ifndef _SEARCH_H_
+#define _SEARCH_H_
+
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+typedef enum {
+ preorder,
+ postorder,
+ endorder,
+ leaf
+} VISIT;
+
+#ifdef _SEARCH_PRIVATE
+typedef struct node {
+ char *key;
+ struct node *llink, *rlink;
+} node_t;
+#endif
+
+__BEGIN_DECLS
+void *tdelete(const void * __restrict, void ** __restrict,
+ int (*)(const void *, const void *));
+void *tfind(const void *, void * const *,
+ int (*)(const void *, const void *));
+void *tsearch(const void *, void **, int (*)(const void *, const void *));
+void twalk(const void *, void (*)(const void *, VISIT, int));
+void tdestroy(void *, void (*)(void *));
+__END_DECLS
+
+#endif /* !_SEARCH_H_ */
