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help / color / mirror / Atom feedFrom: Tomas Vondra <[email protected]>
Subject: [PATCH 1/8] introduce bsearch_arg
Date: Fri, 5 Mar 2021 00:16:40 +0100
---
src/backend/statistics/extended_stats.c | 31 --------------
src/include/port.h | 5 +++
.../statistics/extended_stats_internal.h | 5 ---
src/port/Makefile | 1 +
src/port/bsearch_arg.c | 40 +++++++++++++++++++
5 files changed, 46 insertions(+), 36 deletions(-)
create mode 100644 src/port/bsearch_arg.c
diff --git a/src/backend/statistics/extended_stats.c b/src/backend/statistics/extended_stats.c
index a030ea3653..fa42851fd5 100644
--- a/src/backend/statistics/extended_stats.c
+++ b/src/backend/statistics/extended_stats.c
@@ -659,37 +659,6 @@ compare_datums_simple(Datum a, Datum b, SortSupport ssup)
return ApplySortComparator(a, false, b, false, ssup);
}
-/* simple counterpart to qsort_arg */
-void *
-bsearch_arg(const void *key, const void *base, size_t nmemb, size_t size,
- int (*compar) (const void *, const void *, void *),
- void *arg)
-{
- size_t l,
- u,
- idx;
- const void *p;
- int comparison;
-
- l = 0;
- u = nmemb;
- while (l < u)
- {
- idx = (l + u) / 2;
- p = (void *) (((const char *) base) + (idx * size));
- comparison = (*compar) (key, p, arg);
-
- if (comparison < 0)
- u = idx;
- else if (comparison > 0)
- l = idx + 1;
- else
- return (void *) p;
- }
-
- return NULL;
-}
-
/*
* build_attnums_array
* Transforms a bitmap into an array of AttrNumber values.
diff --git a/src/include/port.h b/src/include/port.h
index 227ef4b148..82f63de325 100644
--- a/src/include/port.h
+++ b/src/include/port.h
@@ -508,6 +508,11 @@ typedef int (*qsort_arg_comparator) (const void *a, const void *b, void *arg);
extern void qsort_arg(void *base, size_t nel, size_t elsize,
qsort_arg_comparator cmp, void *arg);
+extern void *bsearch_arg(const void *key, const void *base,
+ size_t nmemb, size_t size,
+ int (*compar) (const void *, const void *, void *),
+ void *arg);
+
/* port/chklocale.c */
extern int pg_get_encoding_from_locale(const char *ctype, bool write_message);
diff --git a/src/include/statistics/extended_stats_internal.h b/src/include/statistics/extended_stats_internal.h
index c849bd57c0..a0a3cf5b0f 100644
--- a/src/include/statistics/extended_stats_internal.h
+++ b/src/include/statistics/extended_stats_internal.h
@@ -85,11 +85,6 @@ extern int multi_sort_compare_dims(int start, int end, const SortItem *a,
extern int compare_scalars_simple(const void *a, const void *b, void *arg);
extern int compare_datums_simple(Datum a, Datum b, SortSupport ssup);
-extern void *bsearch_arg(const void *key, const void *base,
- size_t nmemb, size_t size,
- int (*compar) (const void *, const void *, void *),
- void *arg);
-
extern AttrNumber *build_attnums_array(Bitmapset *attrs, int *numattrs);
extern SortItem *build_sorted_items(int numrows, int *nitems, HeapTuple *rows,
diff --git a/src/port/Makefile b/src/port/Makefile
index e41b005c4f..52dbf5783f 100644
--- a/src/port/Makefile
+++ b/src/port/Makefile
@@ -40,6 +40,7 @@ LIBS += $(PTHREAD_LIBS)
OBJS = \
$(LIBOBJS) \
$(PG_CRC32C_OBJS) \
+ bsearch_arg.o \
chklocale.o \
erand48.o \
inet_net_ntop.o \
diff --git a/src/port/bsearch_arg.c b/src/port/bsearch_arg.c
new file mode 100644
index 0000000000..d24dc4b7c4
--- /dev/null
+++ b/src/port/bsearch_arg.c
@@ -0,0 +1,40 @@
+/*
+ * bsearch_arg.c: bsearch variant with a user-supplied pointer
+ *
+ * src/port/bsearch_arg.c
+ */
+
+
+#include "c.h"
+
+
+/* simple counterpart to qsort_arg */
+void *
+bsearch_arg(const void *key, const void *base, size_t nmemb, size_t size,
+ int (*compar) (const void *, const void *, void *),
+ void *arg)
+{
+ size_t l,
+ u,
+ idx;
+ const void *p;
+ int comparison;
+
+ l = 0;
+ u = nmemb;
+ while (l < u)
+ {
+ idx = (l + u) / 2;
+ p = (void *) (((const char *) base) + (idx * size));
+ comparison = (*compar) (key, p, arg);
+
+ if (comparison < 0)
+ u = idx;
+ else if (comparison > 0)
+ l = idx + 1;
+ else
+ return (void *) p;
+ }
+
+ return NULL;
+}
--
2.26.2
--------------82D677E9F94AC7574E460205
Content-Type: text/x-patch; charset=UTF-8;
name="0002-Pass-all-scan-keys-to-BRIN-consistent-funct-20210308.patch"
Content-Transfer-Encoding: 7bit
Content-Disposition: attachment;
filename*0="0002-Pass-all-scan-keys-to-BRIN-consistent-funct-20210308.pa";
filename*1="tch"
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