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Stdlib tempfile #189

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Merged
merged 4 commits into from
May 25, 2022
Merged

Stdlib tempfile #189

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795df15
stdlib/os: add mkdir, makedirs, remove, removedirs and rmdir
sbinet May 25, 2022
88633c0
py: introduce FileModeFrom
sbinet May 25, 2022
fda1751
stdlib/os: implement fdopen
sbinet May 25, 2022
3e1daa8
stdlib/tempfile: first import
sbinet May 25, 2022
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131 changes: 67 additions & 64 deletions py/file.go
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Original file line number Diff line number Diff line change
Expand Up @@ -166,71 +166,10 @@ func (o *File) M__exit__(exc_type, exc_value, traceback Object) (Object, error)
}

func OpenFile(filename, mode string, buffering int) (Object, error) {
var fileMode FileMode
var truncate bool
var exclusive bool

for _, m := range mode {
switch m {
case 'r':
if fileMode&FileReadWrite != 0 {
return nil, ExceptionNewf(ValueError, "must have exactly one of create/read/write/append mode")
}
fileMode |= FileRead

case 'w':
if fileMode&FileReadWrite != 0 {
return nil, ExceptionNewf(ValueError, "must have exactly one of create/read/write/append mode")
}
fileMode |= FileWrite
truncate = true

case 'x':
if fileMode&FileReadWrite != 0 {
return nil, ExceptionNewf(ValueError, "must have exactly one of create/read/write/append mode")
}
fileMode |= FileWrite
exclusive = true

case 'a':
if fileMode&FileReadWrite != 0 {
return nil, ExceptionNewf(ValueError, "must have exactly one of create/read/write/append mode")
}
fileMode |= FileWrite
truncate = false

case '+':
if fileMode&FileReadWrite == 0 {
return nil, ExceptionNewf(ValueError, "Must have exactly one of create/read/write/append mode and at most one plus")
}

truncate = (fileMode & FileWrite) != 0
fileMode |= FileReadWrite

case 'b':
if fileMode&FileReadWrite == 0 {
return nil, ExceptionNewf(ValueError, "Must have exactly one of create/read/write/append mode and at most one plus")
}

if fileMode&FileText != 0 {
return nil, ExceptionNewf(ValueError, "can't have text and binary mode at once")
}

fileMode |= FileBinary

case 't':
if fileMode&FileReadWrite == 0 {
return nil, ExceptionNewf(ValueError, "Must have exactly one of create/read/write/append mode and at most one plus")
}

if fileMode&FileBinary != 0 {
return nil, ExceptionNewf(ValueError, "can't have text and binary mode at once")
}

fileMode |= FileText
}
fileMode, truncate, exclusive, err := FileModeFrom(mode)
if err != nil {
return nil, err
}

var fmode int

switch fileMode & FileReadWrite {
Expand Down Expand Up @@ -280,3 +219,67 @@ func OpenFile(filename, mode string, buffering int) (Object, error) {
// Check interface is satisfied
var _ I__enter__ = (*File)(nil)
var _ I__exit__ = (*File)(nil)

func FileModeFrom(mode string) (perm FileMode, trunc, excl bool, err error) {
for _, m := range mode {
switch m {
case 'r':
if perm&FileReadWrite != 0 {
return 0, false, false, ExceptionNewf(ValueError, "must have exactly one of create/read/write/append mode")
}
perm |= FileRead

case 'w':
if perm&FileReadWrite != 0 {
return 0, false, false, ExceptionNewf(ValueError, "must have exactly one of create/read/write/append mode")
}
perm |= FileWrite
trunc = true

case 'x':
if perm&FileReadWrite != 0 {
return 0, false, false, ExceptionNewf(ValueError, "must have exactly one of create/read/write/append mode")
}
perm |= FileWrite
excl = true

case 'a':
if perm&FileReadWrite != 0 {
return 0, false, false, ExceptionNewf(ValueError, "must have exactly one of create/read/write/append mode")
}
perm |= FileWrite
trunc = false

case '+':
if perm&FileReadWrite == 0 {
return 0, false, false, ExceptionNewf(ValueError, "Must have exactly one of create/read/write/append mode and at most one plus")
}

trunc = (perm & FileWrite) != 0
perm |= FileReadWrite

case 'b':
if perm&FileReadWrite == 0 {
return 0, false, false, ExceptionNewf(ValueError, "Must have exactly one of create/read/write/append mode and at most one plus")
}

if perm&FileText != 0 {
return 0, false, false, ExceptionNewf(ValueError, "can't have text and binary mode at once")
}

perm |= FileBinary

case 't':
if perm&FileReadWrite == 0 {
return 0, false, false, ExceptionNewf(ValueError, "Must have exactly one of create/read/write/append mode and at most one plus")
}

if perm&FileBinary != 0 {
return 0, false, false, ExceptionNewf(ValueError, "can't have text and binary mode at once")
}

perm |= FileText
}
}
return perm, trunc, excl, nil
}
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