forked from cory/tildefriends
Cory McWilliams
470814f147
git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@3667 ed5197a5-7fde-0310-b194-c3ffbd925b24
256 lines
9.2 KiB
C
256 lines
9.2 KiB
C
#include "file.h"
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#include "task.h"
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#include <malloc.h>
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#include <stdbool.h>
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#include <uv.h>
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#ifdef _WIN32
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#include <windows.h>
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#else
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#include <dirent.h>
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#include <unistd.h>
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#endif
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static JSValue _file_make_directory(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv);
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static JSValue _file_read_directory(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv);
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static JSValue _file_read_file(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv);
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static JSValue _file_rename_file(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv);
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static JSValue _file_stat(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv);
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static JSValue _file_unlink_file(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv);
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static JSValue _file_write_file(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv);
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static double _time_spec_to_double(const uv_timespec_t* time_spec);
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static void _file_on_stat_complete(uv_fs_t* request);
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typedef struct file_stat_t {
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void* _task;
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JSContext* _context;
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promiseid_t _promise;
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uv_fs_t _request;
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} file_stat_t;
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void tf_file_init(JSContext* context) {
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JSValue global = JS_GetGlobalObject(context);
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JSValue file = JS_NewObject(context);
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JS_SetPropertyStr(context, global, "File", file);
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JS_SetPropertyStr(context, file, "makeDirectory", JS_NewCFunction(context, _file_make_directory, "makeDirectory", 1));
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JS_SetPropertyStr(context, file, "readDirectory", JS_NewCFunction(context, _file_read_directory, "readDirectory", 1));
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JS_SetPropertyStr(context, file, "readFile", JS_NewCFunction(context, _file_read_file, "readFile", 1));
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JS_SetPropertyStr(context, file, "renameFile", JS_NewCFunction(context, _file_rename_file, "renameFile", 2));
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JS_SetPropertyStr(context, file, "stat", JS_NewCFunction(context, _file_stat, "stat", 1));
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JS_SetPropertyStr(context, file, "unlinkFile", JS_NewCFunction(context, _file_unlink_file, "unlinkFile", 1));
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JS_SetPropertyStr(context, file, "writeFile", JS_NewCFunction(context, _file_write_file, "writeFile", 2));
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JS_FreeValue(context, global);
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}
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static const int k_file_read_max = 4 * 1024 * 1024;
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static void _file_read_close_callback(uv_fs_t* req)
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{
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uv_fs_req_cleanup(req);
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free(req);
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}
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static void _file_read_read_callback(uv_fs_t* req)
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{
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uv_fs_req_cleanup(req);
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tf_task_t* task = req->loop->data;
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JSContext* context = tf_task_get_context(task);
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promiseid_t promise = (promiseid_t)(intptr_t)req->data;
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if (req->result >= 0)
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{
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JSValue arrayBuffer = JS_NewArrayBufferCopy(context, (uint8_t*)(req + 1), req->result);
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JSValue global = JS_GetGlobalObject(context);
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JSValue constructor = JS_GetPropertyStr(context, global, "Uint8Array");
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JSValue typedArray = JS_CallConstructor(context, constructor, 1, &arrayBuffer);
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JS_FreeValue(context, constructor);
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JS_FreeValue(context, global);
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JS_FreeValue(context, arrayBuffer);
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tf_task_resolve_promise(task, promise, typedArray);
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JS_FreeValue(context, typedArray);
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}
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else
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{
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tf_task_reject_promise(task, promise, JS_ThrowInternalError(context, uv_strerror(req->result)));
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}
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int result = uv_fs_close(req->loop, req, req->file, _file_read_close_callback);
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if (result < 0)
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{
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free(req);
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}
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}
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static void _file_read_open_callback(uv_fs_t* req)
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{
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uv_fs_req_cleanup(req);
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tf_task_t* task = req->loop->data;
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JSContext* context = tf_task_get_context(task);
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promiseid_t promise = (promiseid_t)(intptr_t)req->data;
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if (req->result >= 0)
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{
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uv_buf_t buf = { .base = (char*)(req + 1), .len = k_file_read_max };
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uv_file file = req->result;
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int result = uv_fs_read(req->loop, req, file, &buf, 1, 0, _file_read_read_callback);
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if (result < 0)
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{
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tf_task_reject_promise(task, promise, JS_ThrowInternalError(context, uv_strerror(result)));
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result = uv_fs_close(req->loop, req, file, _file_read_close_callback);
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}
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}
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else
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{
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tf_task_reject_promise(task, promise, JS_ThrowInternalError(context, uv_strerror(req->result)));
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free(req);
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}
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}
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static JSValue _file_read_file(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv) {
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void* task = JS_GetContextOpaque(context);
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const char* file_name = JS_ToCString(context, argv[0]);
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promiseid_t promise = tf_task_allocate_promise(task);
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uv_fs_t* req = malloc(sizeof(uv_fs_t) + k_file_read_max);
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*req = (uv_fs_t)
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{
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.data = (void*)(intptr_t)promise,
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};
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int result = uv_fs_open(tf_task_get_loop(task), req, file_name, UV_FS_O_RDONLY, 0, _file_read_open_callback);
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if (result < 0)
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{
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tf_task_reject_promise(task, promise, JS_ThrowInternalError(context, uv_strerror(result)));
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}
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JS_FreeCString(context, file_name);
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return tf_task_get_promise(task, promise);
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}
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static JSValue _file_write_file(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv) {
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JSValue result = JS_NULL;
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const char* fileName = JS_ToCString(context, argv[0]);
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FILE* file = fopen(fileName, "wb");
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JS_FreeCString(context, fileName);
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if (file) {
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size_t size;
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uint8_t* buffer = tf_try_get_array_buffer(context, &size, argv[1]);
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if (buffer) {
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int written = fwrite((const char*)buffer, 1, size, file);
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result = JS_NewInt32(context, (size_t)written == size ? 0 : written);
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} else {
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const char* data = JS_ToCStringLen(context, &size, argv[1]);
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int written = fwrite((const char*)data, 1, size, file);
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result = JS_NewInt32(context, (size_t)written == size ? 0 : written);
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JS_FreeCString(context, data);
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}
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fclose(file);
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}
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return result;
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}
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static JSValue _file_rename_file(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv) {
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void* task = JS_GetContextOpaque(context);
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const char* oldName = JS_ToCString(context, argv[0]);
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const char* newName = JS_ToCString(context, argv[1]);
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uv_fs_t req;
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int result = uv_fs_rename(tf_task_get_loop(task), &req, oldName, newName, 0);
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JS_FreeCString(context, oldName);
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JS_FreeCString(context, newName);
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return JS_NewInt32(context, result);
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}
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static JSValue _file_unlink_file(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv) {
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void* task = JS_GetContextOpaque(context);
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const char* fileName = JS_ToCString(context, argv[0]);
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uv_fs_t req;
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int result = uv_fs_unlink(tf_task_get_loop(task), &req, fileName, 0);
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JS_FreeCString(context, fileName);
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return JS_NewInt32(context, result);
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}
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static JSValue _file_read_directory(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv) {
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const char* directory = JS_ToCString(context, argv[0]);
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JSValue array = JS_NewArray(context);
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#ifdef _WIN32
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WIN32_FIND_DATA find;
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std::string pattern = directory;
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pattern += "\\*";
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HANDLE handle = FindFirstFile(pattern.c_str(), &find);
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if (handle != INVALID_HANDLE_VALUE) {
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int index = 0;
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do {
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JS_SetPropertyUint32(context, array, index++, JS_NewString(context, find.cFileName));
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} while (FindNextFile(handle, &find) != 0);
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FindClose(handle);
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}
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#else
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DIR* dir = opendir(directory);
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if (dir) {
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uint32_t index = 0;
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struct dirent* entry = readdir(dir);
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while (entry) {
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JS_SetPropertyUint32(context, array, index++, JS_NewString(context, entry->d_name));
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entry = readdir(dir);
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}
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closedir(dir);
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}
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#endif
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JS_FreeCString(context, directory);
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return array;
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}
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JSValue _file_make_directory(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv) {
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void* task = JS_GetContextOpaque(context);
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const char* directory = JS_ToCString(context, argv[0]);
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uv_fs_t req;
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int result = uv_fs_mkdir(tf_task_get_loop(task), &req, directory, 0755, 0);
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JS_FreeCString(context, directory);
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return JS_NewInt32(context, result);
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}
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JSValue _file_stat(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv) {
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void* task = JS_GetContextOpaque(context);
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const char* path = JS_ToCString(context, argv[0]);
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promiseid_t promise = tf_task_allocate_promise(task);
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file_stat_t* data = malloc(sizeof(file_stat_t));
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data->_task = task;
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data->_promise = promise;
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data->_request.data = data;
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data->_context = context;
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int result = uv_fs_stat(tf_task_get_loop(task), &data->_request, path, _file_on_stat_complete);
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if (result) {
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tf_task_reject_promise(task, promise, JS_NewInt32(context, result));
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free(data);
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}
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JS_FreeCString(context, path);
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return tf_task_get_promise(task, promise);
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}
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static double _time_spec_to_double(const uv_timespec_t* time_spec) {
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return time_spec->tv_sec + (double)(time_spec->tv_nsec) / 1e9;
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}
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static void _file_on_stat_complete(uv_fs_t* request) {
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file_stat_t* data = (file_stat_t*)(request->data);
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JSContext* context = data->_context;
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if (request->result) {
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tf_task_reject_promise(data->_task, data->_promise, JS_NewInt32(context, request->result));
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} else {
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JSValue result = JS_NewObject(context);
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JS_SetPropertyStr(context, result, "mtime", JS_NewFloat64(context, _time_spec_to_double(&request->statbuf.st_mtim)));
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JS_SetPropertyStr(context, result, "ctime", JS_NewFloat64(context, _time_spec_to_double(&request->statbuf.st_ctim)));
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JS_SetPropertyStr(context, result, "atime", JS_NewFloat64(context, _time_spec_to_double(&request->statbuf.st_atim)));
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JS_SetPropertyStr(context, result, "size", JS_NewFloat64(context, request->statbuf.st_size));
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tf_task_resolve_promise(data->_task, data->_promise, result);
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JS_FreeValue(context, result);
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}
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uv_fs_req_cleanup(request);
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free(data);
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}
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