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FileID: implement FileID struct

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`FileID` should encapsulate `st_dev` and `st_ino`. It is a new abstraction
used to check if two files are the same. `FileID`s will be embeded inside
other struts like `buf_t` or `ff_visited_T`, where a full `FileInfo` would be
to big.
This commit is contained in:
Stefan Hoffmann
2014-05-10 11:49:25 +02:00
parent 8a85b37253
commit 4a22fb06b9
4 changed files with 152 additions and 7 deletions
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70
test/unit/os/fs.moon
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@@ -314,6 +314,12 @@ describe 'fs function', ->
is_file_info_filled = (file_info) ->
file_info[0].stat.st_ino > 0 and file_info[0].stat.st_dev > 0
file_id_new = () ->
file_info = ffi.new 'FileID[1]'
file_info[0].inode = 0
file_info[0].device_id = 0
file_info
describe 'os_get_file_info', ->
it 'returns false if given a non-existing file', ->
file_info = file_info_new!
@@ -392,3 +398,67 @@ describe 'fs function', ->
assert.is_true (fs.os_get_file_info path_2, file_info_2)
assert.is_true (fs.os_file_info_id_equal file_info_1, file_info_2)
describe 'os_file_info_get_id', ->
it 'extracts ino/dev from file_info into file_id', ->
file_info = file_info_new!
file_id = file_id_new!
path = 'unit-test-directory/test.file'
assert.is_true (fs.os_get_file_info path, file_info)
fs.os_file_info_get_id(file_info, file_id)
eq file_info[0].stat.st_ino, file_id[0].inode
eq file_info[0].stat.st_dev, file_id[0].device_id
describe 'os_file_info_get_inode', ->
it 'returns the inode from file_info', ->
file_info = file_info_new!
path = 'unit-test-directory/test.file'
assert.is_true (fs.os_get_file_info path, file_info)
inode = fs.os_file_info_get_inode(file_info)
eq file_info[0].stat.st_ino, inode
describe 'os_get_file_id', ->
it 'returns false if given an non-existing file', ->
file_id = file_id_new!
assert.is_false (fs.os_get_file_id '/non-existent', file_id)
it 'returns true if given an existing file and fills file_id', ->
file_id = file_id_new!
path = 'unit-test-directory/test.file'
assert.is_true (fs.os_get_file_id path, file_id)
assert.is_true 0 < file_id[0].inode
assert.is_true 0 < file_id[0].device_id
describe 'os_file_id_equal', ->
it 'returns true if two FileIDs are equal', ->
file_id = file_id_new!
path = 'unit-test-directory/test.file'
assert.is_true (fs.os_get_file_id path, file_id)
assert.is_true (fs.os_file_id_equal file_id, file_id)
it 'returns false if two FileIDs are not equal', ->
file_id_1 = file_id_new!
file_id_2 = file_id_new!
path_1 = 'unit-test-directory/test.file'
path_2 = 'unit-test-directory/test_2.file'
assert.is_true (fs.os_get_file_id path_1, file_id_1)
assert.is_true (fs.os_get_file_id path_2, file_id_2)
assert.is_false (fs.os_file_id_equal file_id_1, file_id_2)
describe 'os_file_id_equal_file_info', ->
it 'returns true if file_id and file_info represent the same file', ->
file_id = file_id_new!
file_info = file_info_new!
path = 'unit-test-directory/test.file'
assert.is_true (fs.os_get_file_id path, file_id)
assert.is_true (fs.os_get_file_info path, file_info)
assert.is_true (fs.os_file_id_equal_file_info file_id, file_info)
it 'returns false if file_id and file_info represent different files',->
file_id = file_id_new!
file_info = file_info_new!
path_1 = 'unit-test-directory/test.file'
path_2 = 'unit-test-directory/test_2.file'
assert.is_true (fs.os_get_file_id path_1, file_id)
assert.is_true (fs.os_get_file_info path_2, file_info)
assert.is_false (fs.os_file_id_equal_file_info file_id, file_info)