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7b64d42d22
Interning short strings with high probability of duplicates can reduce the memory footprint and speed up comparisons. Add strintern() and memintern() APIs that use a hashmap to manage the pool of unique, interned strings. Note: strintern(getenv()) could be used to sanitize git's use of getenv(), in case we ever encounter a platform where a call to getenv() invalidates previous getenv() results (which is allowed by POSIX). Signed-off-by: Karsten Blees <blees@dcon.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
253 lines
3.6 KiB
Bash
Executable file
253 lines
3.6 KiB
Bash
Executable file
#!/bin/sh
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test_description='test hashmap and string hash functions'
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. ./test-lib.sh
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test_hashmap() {
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echo "$1" | test-hashmap $3 > actual &&
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echo "$2" > expect &&
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test_cmp expect actual
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}
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test_expect_success 'hash functions' '
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test_hashmap "hash key1" "2215982743 2215982743 116372151 116372151" &&
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test_hashmap "hash key2" "2215982740 2215982740 116372148 116372148" &&
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test_hashmap "hash fooBarFrotz" "1383912807 1383912807 3189766727 3189766727" &&
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test_hashmap "hash foobarfrotz" "2862305959 2862305959 3189766727 3189766727"
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'
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test_expect_success 'put' '
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test_hashmap "put key1 value1
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put key2 value2
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put fooBarFrotz value3
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put foobarfrotz value4
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size" "NULL
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NULL
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NULL
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NULL
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64 4"
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'
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test_expect_success 'put (case insensitive)' '
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test_hashmap "put key1 value1
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put key2 value2
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put fooBarFrotz value3
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size" "NULL
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NULL
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NULL
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64 3" ignorecase
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'
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test_expect_success 'replace' '
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test_hashmap "put key1 value1
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put key1 value2
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put fooBarFrotz value3
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put fooBarFrotz value4
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size" "NULL
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value1
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NULL
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value3
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64 2"
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'
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test_expect_success 'replace (case insensitive)' '
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test_hashmap "put key1 value1
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put Key1 value2
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put fooBarFrotz value3
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put foobarfrotz value4
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size" "NULL
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value1
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NULL
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value3
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64 2" ignorecase
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'
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test_expect_success 'get' '
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test_hashmap "put key1 value1
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put key2 value2
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put fooBarFrotz value3
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put foobarfrotz value4
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get key1
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get key2
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get fooBarFrotz
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get notInMap" "NULL
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NULL
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NULL
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NULL
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value1
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value2
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value3
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NULL"
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'
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test_expect_success 'get (case insensitive)' '
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test_hashmap "put key1 value1
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put key2 value2
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put fooBarFrotz value3
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get Key1
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get keY2
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get foobarfrotz
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get notInMap" "NULL
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NULL
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NULL
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value1
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value2
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value3
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NULL" ignorecase
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'
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test_expect_success 'add' '
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test_hashmap "add key1 value1
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add key1 value2
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add fooBarFrotz value3
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add fooBarFrotz value4
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get key1
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get fooBarFrotz
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get notInMap" "value2
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value1
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value4
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value3
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NULL"
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'
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test_expect_success 'add (case insensitive)' '
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test_hashmap "add key1 value1
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add Key1 value2
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add fooBarFrotz value3
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add foobarfrotz value4
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get key1
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get Foobarfrotz
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get notInMap" "value2
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value1
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value4
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value3
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NULL" ignorecase
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'
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test_expect_success 'remove' '
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test_hashmap "put key1 value1
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put key2 value2
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put fooBarFrotz value3
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remove key1
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remove key2
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remove notInMap
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size" "NULL
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NULL
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NULL
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value1
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value2
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NULL
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64 1"
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'
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test_expect_success 'remove (case insensitive)' '
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test_hashmap "put key1 value1
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put key2 value2
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put fooBarFrotz value3
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remove Key1
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remove keY2
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remove notInMap
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size" "NULL
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NULL
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NULL
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value1
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value2
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NULL
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64 1" ignorecase
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'
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test_expect_success 'iterate' '
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test_hashmap "put key1 value1
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put key2 value2
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put fooBarFrotz value3
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iterate" "NULL
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NULL
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NULL
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key2 value2
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key1 value1
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fooBarFrotz value3"
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'
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test_expect_success 'iterate (case insensitive)' '
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test_hashmap "put key1 value1
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put key2 value2
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put fooBarFrotz value3
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iterate" "NULL
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NULL
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NULL
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fooBarFrotz value3
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key2 value2
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key1 value1" ignorecase
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'
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test_expect_success 'grow / shrink' '
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rm -f in &&
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rm -f expect &&
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for n in $(test_seq 51)
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do
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echo put key$n value$n >> in &&
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echo NULL >> expect
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done &&
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echo size >> in &&
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echo 64 51 >> expect &&
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echo put key52 value52 >> in &&
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echo NULL >> expect
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echo size >> in &&
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echo 256 52 >> expect &&
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for n in $(test_seq 12)
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do
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echo remove key$n >> in &&
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echo value$n >> expect
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done &&
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echo size >> in &&
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echo 256 40 >> expect &&
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echo remove key40 >> in &&
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echo value40 >> expect &&
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echo size >> in &&
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echo 64 39 >> expect &&
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cat in | test-hashmap > out &&
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test_cmp expect out
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'
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test_expect_success 'string interning' '
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test_hashmap "intern value1
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intern Value1
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intern value2
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intern value2
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" "value1
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Value1
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value2
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value2"
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'
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test_done
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