FilesExpand file tree

master

/

string_spec.rb

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

162 lines (145 loc) · 5.27 KB

master

/

string_spec.rb

Copy path

Top

File metadata and controls

• Code
• Blame

162 lines (145 loc) · 5.27 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

#

# This file is part of ruby-ffi.

# For licensing, see LICENSE.SPECS

#

require File.expand_path(File.join(File.dirname(__FILE__), "spec_helper"))

describe "String tests" do

include FFI

module StrLibTest

extend FFI::Library

ffi_lib TestLibrary::PATH

attach_function :ptr_ret_pointer, [ :pointer, :int], :string

attach_function :pointer_buffer_equals, :buffer_equals, [ :pointer, :string, :size_t ], :int

attach_function :string_dummy, [ :string ], :void

attach_function :string_null, [ ], :string

end

it "A String can be passed to a :pointer argument" do

str = "string buffer"

expect(StrLibTest.pointer_buffer_equals(str, str, str.bytesize)).to eq(1)

expect(StrLibTest.pointer_buffer_equals(str + "a", str + "a", str.bytesize + 1)).to eq(1)

expect(StrLibTest.pointer_buffer_equals(str + "\0", str, str.bytesize + 1)).to eq(1)

expect(StrLibTest.pointer_buffer_equals(str + "a", str + "b", str.bytesize + 1)).to eq(0)

end

it "Poison null byte raises error" do

s = "123\0abc"

expect{ StrLibTest.pointer_buffer_equals("", s, 0) }.to raise_error(ArgumentError)

expect( StrLibTest.pointer_buffer_equals(s, "", 0) ).to eq(1)

end

it "casts nil as NULL pointer" do

expect(StrLibTest.string_dummy(nil)).to be_nil

end

it "return nil for NULL char*" do

expect(StrLibTest.string_null).to be_nil

end

it "reads an array of strings until encountering a NULL pointer" do

strings = ["foo", "bar", "baz", "testing", "ffi"]

ptrary = FFI::MemoryPointer.new(:pointer, 6)

ary = strings.inject([]) do |a, str|

f = FFI::MemoryPointer.new(1024)

f.put_string(0, str)

a << f

end

ary.insert(3, nil)

ptrary.write_array_of_pointer(ary)

expect(ptrary.get_array_of_string(0)).to eq(["foo", "bar", "baz"])

end

it "reads an array of strings of the size specified, substituting nil when a pointer is NULL" do

strings = ["foo", "bar", "baz", "testing", "ffi"]

ptrary = FFI::MemoryPointer.new(:pointer, 6)

ary = strings.inject([]) do |a, str|

f = FFI::MemoryPointer.new(1024)

f.put_string(0, str)

a << f

end

ary.insert(2, nil)

ptrary.write_array_of_pointer(ary)

expect(ptrary.get_array_of_string(0, 4)).to eq(["foo", "bar", nil, "baz"])

end

it "reads an array of strings, taking a memory offset parameter" do

strings = ["foo", "bar", "baz", "testing", "ffi"]

ptrary = FFI::MemoryPointer.new(:pointer, 5)

ary = strings.inject([]) do |a, str|

f = FFI::MemoryPointer.new(1024)

f.put_string(0, str)

a << f

end

ptrary.write_array_of_pointer(ary)

expect(ptrary.get_array_of_string(2 * FFI.type_size(:pointer), 3)).to eq(["baz", "testing", "ffi"])

end

it "raises an IndexError when trying to read an array of strings out of bounds" do

strings = ["foo", "bar", "baz", "testing", "ffi"]

ptrary = FFI::MemoryPointer.new(:pointer, 5)

ary = strings.inject([]) do |a, str|

f = FFI::MemoryPointer.new(1024)

f.put_string(0, str)

a << f

end

ptrary.write_array_of_pointer(ary)

expect { ptrary.get_array_of_string(0, 6) }.to raise_error(IndexError)

end

it "raises an IndexError when trying to read an array of strings using a negative offset" do

strings = ["foo", "bar", "baz", "testing", "ffi"]

ptrary = FFI::MemoryPointer.new(:pointer, 5)

ary = strings.inject([]) do |a, str|

f = FFI::MemoryPointer.new(1024)

f.put_string(0, str)

a << f

end

ptrary.write_array_of_pointer(ary)

expect { ptrary.get_array_of_string(-1) }.to raise_error(IndexError)

end

describe "#write_string" do

# https://github.com/ffi/ffi/issues/805

describe "with no length given" do

it "writes no final \\0" do

ptr = FFI::MemoryPointer.new(8)

ptr.write_int64(-1)

ptr.write_string("äbc")

expect(ptr.read_bytes(5)).to eq("äbc\xff".b)

end

it "doesn't write anything when size is exceeded" do

ptr = FFI::MemoryPointer.new(8)

ptr.write_int64(-1)

expect do

ptr.write_string("äbcdefgh")

end.to raise_error(IndexError, /out of bounds/i)

expect(ptr.read_int64).to eq(-1)

end

it "fits into memory" do

ptr = FFI::MemoryPointer.new(5)

ptr.write_string("äbcd")

expect(ptr.read_string).to eq("äbcd".b)

end

end

describe "with a length" do

it "writes a final \\0" do

ptr = FFI::MemoryPointer.new(8)

ptr.write_int64(-1)

ptr.write_string("äbcd", 3)

expect(ptr.read_bytes(5)).to eq("äb\xFF\xFF".b)

end

it "doesn't write anything when size is exceeded" do

ptr = FFI::MemoryPointer.new(8)

ptr.write_int64(-1)

expect do

ptr.write_string("äbcdefghi", 9)

end.to raise_error(IndexError, /out of bounds/i)

expect(ptr.read_int64).to eq(-1)

end

it "fits into memory" do

ptr = FFI::MemoryPointer.new(5)

ptr.write_string("äbcde", 5)

expect(ptr.read_string).to eq("äbcd".b)

end

end

end

describe "#put_string" do

it "writes a final \\0" do

ptr = FFI::MemoryPointer.new(8)

ptr.write_int64(-1)

ptr.put_string(0, "äbc")

expect(ptr.read_bytes(5)).to eq("äbc\x00".b)

expect(ptr.read_string).to eq("äbc".b)

end

end

end