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much better NULL handling/detection for xlsxreader

develop
Myk Taylor 2020-08-15 22:35:20 -07:00
parent 1e068ef247
commit 4e331ce4ce
1 changed files with 17 additions and 5 deletions
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22
plugins/xlsxreader.cpp
Unescape Escape View File

@ -14,13 +14,18 @@ using namespace DFHack;
DFHACK_PLUGIN("xlsxreader");
// returns NULL on error
// returns NULL if the file failed to open
xlsx_file_handle* open_xlsx_file(std::string filename) {
return new xlsx_file_handle(xlsxioread_open(filename.c_str()));
xlsxioreader opaque_file_handle = xlsxioread_open(filename.c_str());
if (!opaque_file_handle) {
return NULL;
}
return new xlsx_file_handle(opaque_file_handle);
}
void close_xlsx_file(xlsx_file_handle *file_handle) {
CHECK_NULL_POINTER(file_handle);
CHECK_NULL_POINTER(file_handle->handle);
xlsxioread_close(file_handle->handle);
delete(file_handle);
}
@ -29,13 +34,18 @@ void close_xlsx_file(xlsx_file_handle *file_handle) {
xlsx_sheet_handle* open_sheet(xlsx_file_handle *file_handle,
std::string sheet_name) {
CHECK_NULL_POINTER(file_handle);
return new xlsx_sheet_handle(
xlsxioread_sheet_open(file_handle->handle,
sheet_name.c_str(), XLSXIOREAD_SKIP_NONE));
CHECK_NULL_POINTER(file_handle->handle);
xlsxioreadersheet opaque_sheet_handle = xlsxioread_sheet_open(
file_handle->handle, sheet_name.c_str(), XLSXIOREAD_SKIP_NONE);
if (!opaque_sheet_handle) {
return NULL;
}
return new xlsx_sheet_handle(opaque_sheet_handle);
}
void close_sheet(xlsx_sheet_handle *sheet_handle) {
CHECK_NULL_POINTER(sheet_handle);
CHECK_NULL_POINTER(sheet_handle->handle);
xlsxioread_sheet_close(sheet_handle->handle);
delete(sheet_handle);
}
@ -78,6 +88,7 @@ static void * get_xlsxreader_handle(lua_State *L) {
// takes a file handle and returns a table-list of sheet names
int list_sheets(lua_State *L) {
auto file_handle = (xlsx_file_handle *)get_xlsxreader_handle(L);
CHECK_NULL_POINTER(file_handle->handle);
auto sheetNames = std::vector<std::string>();
xlsxioread_list_sheets(file_handle->handle, list_callback, &sheetNames);
Lua::PushVector(L, sheetNames, true);
@ -88,6 +99,7 @@ int list_sheets(lua_State *L) {
// already processed the last row in the file.
int get_row(lua_State *L) {
auto sheet_handle = (xlsx_sheet_handle *)get_xlsxreader_handle(L);
CHECK_NULL_POINTER(sheet_handle->handle);
bool ok = get_next_row(sheet_handle);
if (!ok) {
lua_pushnil(L);