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Copying file contents rather than memory mapping

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This commit is contained in:
gingerBill
2021-10-12 11:06:39 +01:00
parent 75e3df6da2
commit 2ad6aa7886
4 changed files with 47 additions and 44 deletions
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50
src/common.cpp
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@@ -883,33 +883,33 @@ ReadDirectoryError read_directory(String path, Array<FileInfo> *fi) {
struct MemoryMappedFile {
struct LoadedFile {
void *handle;
void *data;
i32 size;
void const *data;
i32 size;
};
enum MemoryMappedFileError {
MemoryMappedFile_None,
enum LoadedFileError {
LoadedFile_None,
MemoryMappedFile_Empty,
MemoryMappedFile_FileTooLarge,
MemoryMappedFile_Invalid,
MemoryMappedFile_NotExists,
MemoryMappedFile_Permission,
LoadedFile_Empty,
LoadedFile_FileTooLarge,
LoadedFile_Invalid,
LoadedFile_NotExists,
LoadedFile_Permission,
MemoryMappedFile_COUNT,
LoadedFile_COUNT,
};
MemoryMappedFileError memory_map_file_32(char const *fullpath, MemoryMappedFile *memory_mapped_file, bool copy_file_contents) {
MemoryMappedFileError err = MemoryMappedFile_None;
LoadedFileError load_file_32(char const *fullpath, LoadedFile *memory_mapped_file, bool copy_file_contents) {
LoadedFileError err = LoadedFile_None;
if (!copy_file_contents) {
#if defined(GB_SYSTEM_WINDOWS)
isize w_len = 0;
wchar_t *w_str = gb__alloc_utf8_to_ucs2(temporary_allocator(), fullpath, &w_len);
if (w_str == nullptr) {
return MemoryMappedFile_Invalid;
return LoadedFile_Invalid;
}
i64 file_size = 0;
LARGE_INTEGER li_file_size = {};
@@ -930,12 +930,12 @@ MemoryMappedFileError memory_map_file_32(char const *fullpath, MemoryMappedFile
file_size = cast(i64)li_file_size.QuadPart;
if (file_size > I32_MAX) {
CloseHandle(handle);
return MemoryMappedFile_FileTooLarge;
return LoadedFile_FileTooLarge;
}
if (file_size == 0) {
CloseHandle(handle);
err = MemoryMappedFile_Empty;
err = LoadedFile_Empty;
memory_mapped_file->handle = nullptr;
memory_mapped_file->data = nullptr;
memory_mapped_file->size = 0;
@@ -955,16 +955,16 @@ MemoryMappedFileError memory_map_file_32(char const *fullpath, MemoryMappedFile
{
DWORD handle_err = GetLastError();
CloseHandle(handle);
err = MemoryMappedFile_Invalid;
err = LoadedFile_Invalid;
switch (handle_err) {
case ERROR_FILE_NOT_FOUND:
case ERROR_PATH_NOT_FOUND:
case ERROR_INVALID_DRIVE:
err = MemoryMappedFile_NotExists;
err = LoadedFile_NotExists;
break;
case ERROR_ACCESS_DENIED:
case ERROR_INVALID_ACCESS:
err = MemoryMappedFile_Permission;
err = LoadedFile_Permission;
break;
}
return err;
@@ -975,7 +975,7 @@ MemoryMappedFileError memory_map_file_32(char const *fullpath, MemoryMappedFile
gbFileContents fc = gb_file_read_contents(heap_allocator(), true, fullpath);
if (fc.size > I32_MAX) {
err = MemoryMappedFile_FileTooLarge;
err = LoadedFile_FileTooLarge;
gb_file_free_contents(&fc);
} else if (fc.data != nullptr) {
memory_mapped_file->handle = nullptr;
@@ -987,13 +987,13 @@ MemoryMappedFileError memory_map_file_32(char const *fullpath, MemoryMappedFile
defer (gb_file_close(&f));
switch (file_err) {
case gbFileError_Invalid: err = MemoryMappedFile_Invalid; break;
case gbFileError_NotExists: err = MemoryMappedFile_NotExists; break;
case gbFileError_Permission: err = MemoryMappedFile_Permission; break;
case gbFileError_Invalid: err = LoadedFile_Invalid; break;
case gbFileError_NotExists: err = LoadedFile_NotExists; break;
case gbFileError_Permission: err = LoadedFile_Permission; break;
}
if (err == MemoryMappedFile_None && gb_file_size(&f) == 0) {
err = MemoryMappedFile_Empty;
if (err == LoadedFile_None && gb_file_size(&f) == 0) {
err = LoadedFile_Empty;
}
}
return err;