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https://github.com/koreader/koreader.git
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8496ccb073
1. Enhance FileInfo:FileSize() to handle gigabytes and rename it to FileInfo:FormatSize() as it is not just for file sizes. 2. Add "Free space" field to file info because it is useful to see it when deciding whether to remove this file or not.
95 lines
2.3 KiB
C
95 lines
2.3 KiB
C
/*
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KindlePDFViewer: miscellaneous utility functions for Lua
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Copyright (C) 2011 Hans-Werner Hilse <hilse@web.de>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <sys/time.h>
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#include <sys/statvfs.h>
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#include <unistd.h>
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#include "util.h"
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static int gettime(lua_State *L) {
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struct timeval tv;
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gettimeofday(&tv, NULL);
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lua_pushinteger(L, tv.tv_sec);
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lua_pushinteger(L, tv.tv_usec);
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return 2;
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}
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static int util_sleep(lua_State *L) {
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unsigned int seconds = luaL_optint(L, 1, 0);
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sleep(seconds);
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return 0;
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}
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static int util_usleep(lua_State *L) {
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useconds_t useconds = luaL_optint(L, 1, 0);
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usleep(useconds);
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return 0;
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}
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static int util_df(lua_State *L) {
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char *path = luaL_checkstring(L, 1);
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struct statvfs vfs;
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statvfs(path, &vfs);
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lua_pushnumber(L, (double)vfs.f_bfree * (double)vfs.f_bsize);
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return 1;
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}
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/* Turn UTF-8 char code to Unicode */
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static int utf8charcode(lua_State *L) {
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size_t len;
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const char *utf8char = luaL_checklstring(L, 1, &len);
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int c;
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if(len == 1) {
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c = utf8char[0] & 0x7F; /* should not be needed */
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} else if(len == 2) {
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c = ((utf8char[0] & 0x1F) << 6) | (utf8char[1] & 0x3F);
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} else if(len == 3) {
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c = ((utf8char[0] & 0x0F) << 12) | ((utf8char[1] & 0x3F) << 6) | (utf8char[2] & 0x3F);
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} else {
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// 4, 5, 6 byte cases still missing
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return 0;
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}
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lua_pushinteger(L, c);
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return 1;
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}
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static int isEmulated(lua_State *L) {
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#ifdef EMULATE_READER
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lua_pushinteger(L, 1);
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#else
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lua_pushinteger(L, 0);
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#endif
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return 1;
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}
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static const struct luaL_Reg util_func[] = {
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{"gettime", gettime},
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{"sleep", util_sleep},
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{"usleep", util_usleep},
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{"utf8charcode", utf8charcode},
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{"isEmulated", isEmulated},
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{"df", util_df},
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{NULL, NULL}
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};
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int luaopen_util(lua_State *L) {
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luaL_register(L, "util", util_func);
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return 1;
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}
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