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fix #498

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This commit is contained in:
blueloveTH 2026-04-17 11:10:55 +08:00
parent d62b1b4eec
commit 5d30381e19
2 changed files with 24 additions and 7 deletions
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17
src/modules/os.c
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@ -136,6 +136,7 @@ static bool io_FileIO__exit__(int argc, py_Ref argv) {
static bool io_FileIO_read(int argc, py_Ref argv) {
io_FileIO* ud = py_touserdata(py_arg(0));
if(ud->file == NULL) return ValueError("I/O operation on closed file");
bool is_binary = ud->mode[strlen(ud->mode) - 1] == 'b';
int size;
if(argc == 1) {
@ -146,24 +147,37 @@ static bool io_FileIO_read(int argc, py_Ref argv) {
} else if(argc == 2) {
PY_CHECK_ARG_TYPE(1, tp_int);
size = py_toint(py_arg(1));
if (size < 0) {
long current = ftell(ud->file);
fseek(ud->file, 0, SEEK_END);
size = ftell(ud->file);
fseek(ud->file, current, SEEK_SET);
}
} else {
return TypeError("read() takes at most 2 arguments (%d given)", argc);
}
if(is_binary) {
void* dst = py_newbytes(py_retval(), size);
if(size > 0) {
int actual_size = fread(dst, 1, size, ud->file);
py_bytes_resize(py_retval(), actual_size);
}
} else {
if(size > 0) {
void* dst = PK_MALLOC(size);
int actual_size = fread(dst, 1, size, ud->file);
py_newstrv(py_retval(), (c11_sv){dst, actual_size});
PK_FREE(dst);
} else {
py_newstr(py_retval(), "");
}
}
return true;
}
static bool io_FileIO_tell(int argc, py_Ref argv) {
io_FileIO* ud = py_touserdata(py_arg(0));
if(ud->file == NULL) return ValueError("I/O operation on closed file");
py_newint(py_retval(), ftell(ud->file));
return true;
}
@ -173,6 +187,7 @@ static bool io_FileIO_seek(int argc, py_Ref argv) {
PY_CHECK_ARG_TYPE(1, tp_int);
PY_CHECK_ARG_TYPE(2, tp_int);
io_FileIO* ud = py_touserdata(py_arg(0));
if(ud->file == NULL) return ValueError("I/O operation on closed file");
long cookie = py_toint(py_arg(1));
int whence = py_toint(py_arg(2));
py_newint(py_retval(), fseek(ud->file, cookie, whence));
@ -193,6 +208,7 @@ static bool io_FileIO_close(int argc, py_Ref argv) {
static bool io_FileIO_write(int argc, py_Ref argv) {
PY_CHECK_ARGC(2);
io_FileIO* ud = py_touserdata(py_arg(0));
if(ud->file == NULL) return ValueError("I/O operation on closed file");
size_t written_size;
if(ud->mode[strlen(ud->mode) - 1] == 'b') {
PY_CHECK_ARG_TYPE(1, tp_bytes);
@ -211,6 +227,7 @@ static bool io_FileIO_write(int argc, py_Ref argv) {
static bool io_FileIO_flush(int argc, py_Ref argv) {
PY_CHECK_ARGC(1);
io_FileIO* ud = py_touserdata(py_arg(0));
if(ud->file == NULL) return ValueError("I/O operation on closed file");
fflush(ud->file);
py_newnone(py_retval());
return true;

2
tests/792_file.py
View File

@ -38,7 +38,7 @@ with open('123.txt', 'rt') as f:
assert f.read() == ''
f.seek(3, io.SEEK_SET)
assert f.tell() == 3
assert f.read() == '456'
assert f.read(-1) == '456'
assert f.tell() == 6
with open('123.txt', 'a') as f: