diff options
Diffstat (limited to 'lib/bytes/bytes_example_test.go')
| -rw-r--r-- | lib/bytes/bytes_example_test.go | 339 |
1 files changed, 279 insertions, 60 deletions
diff --git a/lib/bytes/bytes_example_test.go b/lib/bytes/bytes_example_test.go index c1ef70bb..314275d2 100644 --- a/lib/bytes/bytes_example_test.go +++ b/lib/bytes/bytes_example_test.go @@ -7,6 +7,8 @@ package bytes import ( "fmt" "math" + + "github.com/shuLhan/share/lib/ascii" ) func ExampleAppendInt16() { @@ -73,99 +75,264 @@ func ExampleAppendUint32() { // 1 => 0x1 => []byte{0x0, 0x0, 0x0, 0x1} } +func ExampleConcat() { + fmt.Printf("%s\n", Concat()) + fmt.Printf("%s\n", Concat([]byte{})) + fmt.Printf("%s\n", Concat([]byte{}, []byte("B"))) + fmt.Printf("%s\n", Concat("with []int:", []int{1, 2})) + fmt.Printf("%s\n", Concat([]byte("bytes"), " and ", []byte("string"))) + fmt.Printf("%s\n", Concat([]byte("A"), 1, []int{2}, []byte{}, []byte("C"))) + // Output: + // + // + // B + // with []int: + // bytes and string + // AC +} + +func ExampleCopy() { + // Copying empty slice. + org := []byte{} + cp := Copy(org) + fmt.Printf("%d %q\n", len(cp), cp) + + org = []byte("slice of life") + tmp := org + cp = Copy(org) + fmt.Printf("%d %q\n", len(cp), cp) + fmt.Printf("Original address == tmp address: %v\n", &org[0] == &tmp[0]) + fmt.Printf("Original address == copy address: %v\n", &org[0] == &cp[0]) + + // Output: + // 0 "" + // 13 "slice of life" + // Original address == tmp address: true + // Original address == copy address: false +} + func ExampleCutUntilToken() { - line := []byte(`abc \def ghi`) + text := []byte(`\\abc \def \deg`) - cut, p, found := CutUntilToken(line, []byte("def"), 0, false) - fmt.Printf("'%s' %d %t\n", cut, p, found) + cut, pos, found := CutUntilToken(text, nil, 0, false) + fmt.Printf("'%s' %d %t\n", cut, pos, found) - cut, p, found = CutUntilToken(line, []byte("def"), 0, true) - fmt.Printf("'%s' %d %t\n", cut, p, found) + cut, pos, found = CutUntilToken(text, []byte("def"), 0, false) + fmt.Printf("'%s' %d %t\n", cut, pos, found) - cut, p, found = CutUntilToken(line, []byte("ef"), 0, true) - fmt.Printf("'%s' %d %t\n", cut, p, found) + cut, pos, found = CutUntilToken(text, []byte("def"), 0, true) + fmt.Printf("'%s' %d %t\n", cut, pos, found) - cut, p, found = CutUntilToken(line, []byte("hi"), 0, true) - fmt.Printf("'%s' %d %t\n", cut, p, found) + cut, pos, found = CutUntilToken(text, []byte("ef"), -1, true) + fmt.Printf("'%s' %d %t\n", cut, pos, found) + + cut, pos, found = CutUntilToken(text, []byte("hi"), 0, true) + fmt.Printf("'%s' %d %t\n", cut, pos, found) // Output: - // 'abc \' 8 true - // 'abc def ghi' 12 false - // 'abc \d' 8 true - // 'abc \def g' 12 true + // '\\abc \def \deg' -1 false + // '\\abc \' 10 true + // '\abc def \deg' 15 false + // '\abc \d' 10 true + // '\abc \def \deg' 15 false } func ExampleEncloseRemove() { - line := []byte(`[[ ABC ]] DEF`) - leftcap := []byte(`[[`) - rightcap := []byte(`]]`) + text := []byte(`[[ A ]]-[[ B ]] C`) + + got, isCut := EncloseRemove(text, []byte("[["), []byte("]]")) + fmt.Printf("'%s' %t\n", got, isCut) + + got, isCut = EncloseRemove(text, []byte("[["), []byte("}}")) + fmt.Printf("'%s' %t\n", got, isCut) + + text = []byte(`// Copyright 2016-2018 "Shulhan <ms@kilabit.info>". All rights reserved.`) + + got, isCut = EncloseRemove(text, []byte("<"), []byte(">")) + fmt.Printf("'%s' %t\n", got, isCut) + + got, isCut = EncloseRemove(text, []byte(`"`), []byte(`"`)) + fmt.Printf("'%s' %t\n", got, isCut) + + got, isCut = EncloseRemove(text, []byte(`/`), []byte(`/`)) + fmt.Printf("'%s' %t\n", got, isCut) + + text = []byte(`/* TEST */`) - got, changed := EncloseRemove(line, leftcap, rightcap) + got, isCut = EncloseRemove(text, []byte(`/*`), []byte(`*/`)) + fmt.Printf("'%s' %t\n", got, isCut) - fmt.Printf("'%s' %t\n", got, changed) - // Output: ' DEF' true + // Output: + // '- C' true + // '[[ A ]]-[[ B ]] C' false + // '// Copyright 2016-2018 "Shulhan ". All rights reserved.' true + // '// Copyright 2016-2018 . All rights reserved.' true + // ' Copyright 2016-2018 "Shulhan <ms@kilabit.info>". All rights reserved.' true + // '' true } func ExampleEncloseToken() { - line := []byte(`// Copyright 2016-2018 "Shulhan <ms@kilabit.info>". All rights reserved.`) - token := []byte(`"`) - leftcap := []byte(`\`) - rightcap := []byte(`_`) + text := []byte(`// Copyright 2016-2018 "Shulhan <ms@kilabit.info>". All rights reserved.`) + + got, isChanged := EncloseToken(text, []byte(`"`), []byte(`\`), []byte(`_`)) + fmt.Printf("%t '%s'\n", isChanged, got) + + got, isChanged = EncloseToken(text, []byte(`_`), []byte(`-`), []byte(`-`)) + fmt.Printf("%t '%s'\n", isChanged, got) + + got, isChanged = EncloseToken(text, []byte(`/`), []byte(`\`), nil) + fmt.Printf("%t '%s'\n", isChanged, got) - got, changed := EncloseToken(line, token, leftcap, rightcap) + got, isChanged = EncloseToken(text, []byte(`<`), []byte(`<`), []byte(` `)) + fmt.Printf("%t '%s'\n", isChanged, got) - fmt.Printf("'%s' %t\n", got, changed) // Output: - // '// Copyright 2016-2018 \"_Shulhan <ms@kilabit.info>\"_. All rights reserved.' true + // true '// Copyright 2016-2018 \"_Shulhan <ms@kilabit.info>\"_. All rights reserved.' + // false '// Copyright 2016-2018 "Shulhan <ms@kilabit.info>". All rights reserved.' + // true '\/\/ Copyright 2016-2018 "Shulhan <ms@kilabit.info>". All rights reserved.' + // true '// Copyright 2016-2018 "Shulhan << ms@kilabit.info>". All rights reserved.' } -func ExampleIndexes() { - s := []byte("moo moomoo") - token := []byte("moo") +func ExampleInReplace() { + text := InReplace([]byte{}, []byte(ascii.LettersNumber), '_') + fmt.Printf("%q\n", text) + + text = InReplace([]byte("/a/b/c"), []byte(ascii.LettersNumber), '_') + fmt.Printf("%q\n", text) + + _ = InReplace(text, []byte(ascii.LettersNumber), '/') + fmt.Printf("%q\n", text) + + // Output: + // "" + // "_a_b_c" + // "/a/b/c" +} - idxs := Indexes(s, token) - fmt.Println(idxs) +func ExampleIndexes() { + fmt.Println(Indexes([]byte(""), []byte("moo"))) + fmt.Println(Indexes([]byte("moo moomoo"), []byte{})) + fmt.Println(Indexes([]byte("moo moomoo"), []byte("moo"))) // Output: + // [] + // [] // [0 4 7] } func ExampleIsTokenAt() { - line := []byte("Hello, world") - token := []byte("world") - token2 := []byte("worlds") + text := []byte("Hello, world") + tokenWorld := []byte("world") + tokenWorlds := []byte("worlds") tokenEmpty := []byte{} - fmt.Printf("%t\n", IsTokenAt(line, tokenEmpty, 6)) - fmt.Printf("%t\n", IsTokenAt(line, token, 6)) - fmt.Printf("%t\n", IsTokenAt(line, token, 7)) - fmt.Printf("%t\n", IsTokenAt(line, token, 8)) - fmt.Printf("%t\n", IsTokenAt(line, token2, 8)) + fmt.Printf("%t\n", IsTokenAt(text, tokenEmpty, 6)) + fmt.Printf("%t\n", IsTokenAt(text, tokenWorld, -1)) + fmt.Printf("%t\n", IsTokenAt(text, tokenWorld, 6)) + fmt.Printf("%t\n", IsTokenAt(text, tokenWorld, 7)) + fmt.Printf("%t\n", IsTokenAt(text, tokenWorld, 8)) + fmt.Printf("%t\n", IsTokenAt(text, tokenWorlds, 8)) // Output: // false // false + // false // true // false // false } -func ExampleSkipAfterToken() { - line := []byte(`abc \def ghi`) +func ExampleMergeSpaces() { + fmt.Printf("%s\n", MergeSpaces([]byte(""))) + fmt.Printf("%s\n", MergeSpaces([]byte(" \t\v\r\n\r\n\fa \t\v\r\n\r\n\f"))) + // Output: + // + // a +} - p, found := SkipAfterToken(line, []byte("def"), 0, false) - fmt.Printf("%d %t\n", p, found) +func ExamplePrintHex() { + title := "PrintHex" + data := []byte("Hello, world !") + PrintHex(title, data, 5) + // Output: + // PrintHex + // 0 - 48 65 6C 6C 6F || H e l l o + // 5 - 2C 20 77 6F 72 || , . w o r + // 10 - 6C 64 20 21 || l d . ! +} + +func ExampleReadHexByte() { + fmt.Println(ReadHexByte([]byte{}, 0)) + fmt.Println(ReadHexByte([]byte("x0"), 0)) + fmt.Println(ReadHexByte([]byte("00"), 0)) + fmt.Println(ReadHexByte([]byte("01"), 0)) + fmt.Println(ReadHexByte([]byte("10"), 0)) + fmt.Println(ReadHexByte([]byte("1A"), 0)) + fmt.Println(ReadHexByte([]byte("1a"), 0)) + fmt.Println(ReadHexByte([]byte("1a"), -1)) + // Output: + // 0 false + // 0 false + // 0 true + // 1 true + // 16 true + // 26 true + // 26 true + // 0 false +} + +func ExampleReadInt16() { + fmt.Println(ReadInt16([]byte{0x01, 0x02, 0x03, 0x04}, 3)) // x is out of range. + fmt.Println(ReadInt16([]byte{0x01, 0x02, 0x03, 0x04}, 0)) // 0x0102 + fmt.Println(ReadInt16([]byte{0x01, 0x02, 0xf0, 0x04}, 2)) // 0xf004 + // Output: + // 0 + // 258 + // -4092 +} + +func ExampleReadInt32() { + fmt.Println(ReadInt32([]byte{0x01, 0x02, 0x03, 0x04}, 1)) // x is out of range. + fmt.Println(ReadInt32([]byte{0x01, 0x02, 0x03, 0x04}, 0)) // 0x01020304 + fmt.Println(ReadInt32([]byte{0xf1, 0x02, 0x03, 0x04}, 0)) // 0xf1020304 + // Output: + // 0 + // 16909060 + // -251526396 +} - p, found = SkipAfterToken(line, []byte("def"), 0, true) - fmt.Printf("%d %t\n", p, found) +func ExampleReadUint16() { + fmt.Println(ReadUint16([]byte{0x01, 0x02, 0xf0, 0x04}, 3)) // x is out of range. + fmt.Println(ReadUint16([]byte{0x01, 0x02, 0xf0, 0x04}, 0)) // 0x0102 + fmt.Println(ReadUint16([]byte{0x01, 0x02, 0xf0, 0x04}, 2)) // 0xf004 + // Output: + // 0 + // 258 + // 61444 +} - p, found = SkipAfterToken(line, []byte("ef"), 0, true) - fmt.Printf("%d %t\n", p, found) +func ExampleReadUint32() { + fmt.Println(ReadUint32([]byte{0x01, 0x02, 0x03, 0x04}, 1)) // x is out of range. + fmt.Println(ReadUint32([]byte{0x01, 0x02, 0x03, 0x04}, 0)) // 0x01020304 + fmt.Println(ReadUint32([]byte{0xf1, 0x02, 0x03, 0x04}, 0)) // 0xf1020304 + // Output: + // 0 + // 16909060 + // 4043440900 +} - p, found = SkipAfterToken(line, []byte("hi"), 0, true) - fmt.Printf("%d %t\n", p, found) +func ExampleSkipAfterToken() { + text := []byte(`abc \def ghi`) + fmt.Println(SkipAfterToken(text, []byte("def"), -1, false)) + fmt.Println(SkipAfterToken(text, []byte("def"), 0, true)) + fmt.Println(SkipAfterToken(text, []byte("deg"), 0, false)) + fmt.Println(SkipAfterToken(text, []byte("deg"), 0, true)) + fmt.Println(SkipAfterToken(text, []byte("ef"), 0, true)) + fmt.Println(SkipAfterToken(text, []byte("hi"), 0, true)) // Output: // 8 true - // 12 false + // -1 false + // -1 false + // -1 false // 8 true // 12 true } @@ -185,21 +352,73 @@ func ExampleSnippetByIndexes() { } func ExampleTokenFind() { - line := []byte("// Copyright 2018, Shulhan <ms@kilabit.info>. All rights reserved.") - token := []byte("right") - - at := TokenFind(line, token, 0) + text := []byte("// Copyright 2018, Shulhan <ms@kilabit.info>. All rights reserved.") - fmt.Printf("%d\n", at) - // Output: 7 + fmt.Println(TokenFind(text, []byte{}, 0)) + fmt.Println(TokenFind(text, []byte("right"), -1)) + fmt.Println(TokenFind(text, []byte("."), 0)) + fmt.Println(TokenFind(text, []byte("."), 42)) + fmt.Println(TokenFind(text, []byte("."), 48)) + fmt.Println(TokenFind(text, []byte("d."), 0)) + // Output: + // -1 + // 7 + // 38 + // 44 + // 65 + // 64 } func ExampleWordIndexes() { - s := []byte("moo moomoo moo") - token := []byte("moo") + text := []byte("moo moomoo moo") - idxs := WordIndexes(s, token) - fmt.Println(idxs) + fmt.Println(WordIndexes(text, []byte("mo"))) + fmt.Println(WordIndexes(text, []byte("moo"))) + fmt.Println(WordIndexes(text, []byte("mooo"))) // Output: + // [] // [0 11] + // [] +} + +func ExampleWriteUint16() { + data := []byte("Hello, world!") + + var v uint16 + + v = 'h' << 8 + v |= 'E' + + WriteUint16(data, uint(len(data)-1), v) // Index out of range + fmt.Println(string(data)) + + WriteUint16(data, 0, v) + fmt.Println(string(data)) + // Output: + // Hello, world! + // hEllo, world! +} + +func ExampleWriteUint32() { + data := []byte("Hello, world!") + + var v uint32 + + v = 'h' << 24 + v |= 'E' << 16 + v |= 'L' << 8 + v |= 'L' + + WriteUint32(data, uint(len(data)-1), v) // Index out of range + fmt.Println(string(data)) + + WriteUint32(data, 0, v) + fmt.Println(string(data)) + + WriteUint32(data, 7, v) + fmt.Println(string(data)) + // Output: + // Hello, world! + // hELLo, world! + // hELLo, hELLd! } |