--- /dev/null
+/*
+ * lar - Lua Archive Library
+ *
+ * Copyright (C) 2009 Jo-Philipp Wich <xm@subsignal.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+#include "lua.h"
+#include "lualib.h"
+#include "lauxlib.h"
+#include "lar.h"
+
+typedef struct {
+ int fd;
+ char *data;
+ size_t length;
+} mmap_handle;
+
+static int larlib_perror( lua_State *L, const char *message )
+{
+ lua_pushnil(L);
+ lua_pushstring(L, message);
+
+ return 2;
+}
+
+int larlib_open( lua_State *L )
+{
+ lar_archive *ar, **udata;
+ const char *filename = luaL_checkstring( L, 1 );
+
+ if( filename != NULL && (ar = lar_open(filename)) != NULL )
+ {
+ if( (udata = lua_newuserdata(L, sizeof(lar_archive *))) != NULL )
+ {
+ *udata = ar;
+ luaL_getmetatable(L, "lar.archive");
+ lua_setmetatable(L, -2);
+ }
+ else
+ {
+ return luaL_error(L, "Out of memory");
+ }
+ }
+ else
+ {
+ return larlib_perror(L, "Archive not found");
+ }
+
+ return 1;
+}
+
+int larlib_find( lua_State *L )
+{
+ const char *filename = luaL_checkstring( L, 1 );
+ const char *basepath = luaL_optstring( L, 2, "./" );
+ int is_pkg = strstr(filename, "/") ? 0 : 1;
+ lar_archive *ar, **udata;
+
+ if( ((ar = lar_find_archive(filename, basepath, is_pkg)) != NULL) ||
+ ((ar = lar_find_archive(filename, LUA_LDIR, is_pkg)) != NULL) ||
+ ((ar = lar_find_archive(filename, LUA_CDIR, is_pkg)) != NULL) )
+ {
+ if( (udata = lua_newuserdata(L, sizeof(lar_archive *))) != NULL )
+ {
+ *udata = ar;
+ luaL_getmetatable(L, "lar.archive");
+ lua_setmetatable(L, -2);
+ }
+ else
+ {
+ return luaL_error(L, "Out of memory");
+ }
+ }
+ else
+ {
+ return larlib_perror(L, "Archive not found");
+ }
+
+ return 1;
+}
+
+int larlib_md5( lua_State *L )
+{
+ int i;
+ char md5[16], md5_hex[33];
+ const char *data = luaL_checkstring( L, 1 );
+ md5_state_t state;
+
+ md5_init(&state);
+ md5_append(&state, (const md5_byte_t *)data, strlen(data));
+ md5_finish(&state, (md5_byte_t *)md5);
+
+ for( i = 0; i < 16; i++ )
+ sprintf(&md5_hex[i*2], "%02x", (unsigned char)md5[i]);
+
+ lua_pushstring(L, md5_hex);
+ return 1;
+}
+
+int larlib_md5_file( lua_State *L )
+{
+ int i, fd, len;
+ char md5[16], md5_hex[33], buffer[1024];
+ const char *filename = luaL_checkstring( L, 1 );
+ md5_state_t state;
+
+ if( (fd = open(filename, O_RDONLY)) != -1 )
+ {
+ md5_init(&state);
+
+ while( (len = read(fd, buffer, 1024)) > 0 )
+ md5_append(&state, (const md5_byte_t *)buffer, len);
+
+ md5_finish(&state, (md5_byte_t *)md5);
+
+ for( i = 0; i < 16; i++ )
+ sprintf(&md5_hex[i*2], "%02x", (unsigned char)md5[i]);
+
+ close(fd);
+ lua_pushstring(L, md5_hex);
+ }
+ else
+ {
+ return larlib_perror(L, strerror(errno));
+ }
+
+ return 1;
+}
+
+static int larlib_mkpath( const char *name, const char *path, char *buffer )
+{
+ int nlen = strlen(name);
+ int plen = strlen(path);
+
+ if( (nlen + plen + 1) <= 1024 )
+ {
+ strcpy(buffer, path);
+
+ if( buffer[plen-1] != '/' )
+ buffer[plen++] = '/';
+
+ strcpy(&buffer[plen], name);
+ buffer[plen + nlen] = '\0';
+
+ return 0;
+ }
+
+ return 1;
+}
+
+static int larlib__gc( lua_State *L )
+{
+ lar_archive **archive = luaL_checkudata( L, 1, "lar.archive" );
+
+ if( *archive )
+ lar_close(*archive);
+
+ *archive = NULL;
+ return 0;
+}
+
+
+static int larlib_member__open( lua_State *L, lar_member *mb )
+{
+ lar_archive **archive = NULL;
+ const char *filename = NULL;
+ lar_member **udata;
+
+ if( mb == NULL )
+ {
+ *archive = luaL_checkudata( L, 1, "lar.archive" );
+ filename = luaL_checkstring( L, 2 );
+ }
+
+ if( mb != NULL || (mb = lar_open_member(*archive, filename)) != NULL )
+ {
+ if( (udata = lua_newuserdata(L, sizeof(lar_member *))) != NULL )
+ {
+ *udata = mb;
+ luaL_getmetatable(L, "lar.member");
+ lua_setmetatable(L, -2);
+ }
+ else
+ {
+ return luaL_error(L, "Out of memory");
+ }
+ }
+ else
+ {
+ return larlib_perror(L, "Member not found in archive");
+ }
+
+ return 1;
+}
+
+int larlib_member_open( lua_State *L )
+{
+ return larlib_member__open( L, NULL );
+}
+
+int larlib_member_find( lua_State *L )
+{
+ lar_archive **archive = luaL_checkudata( L, 1, "lar.archive" );
+ const char *package = luaL_checkstring( L, 2 );
+ lar_member *mb, **udata;
+
+ if( (mb = lar_find_member(*archive, package)) != NULL )
+ {
+ if( (udata = lua_newuserdata(L, sizeof(lar_member *))) != NULL )
+ {
+ *udata = mb;
+ luaL_getmetatable(L, "lar.member");
+ lua_setmetatable(L, -2);
+ }
+ else
+ {
+ return luaL_error(L, "Out of memory");
+ }
+ }
+ else
+ {
+ return larlib_perror(L, "Member not found in archive");
+ }
+
+ return 1;
+}
+
+int larlib_member_size( lua_State *L )
+{
+ lar_member **member = luaL_checkudata( L, 1, "lar.member" );
+ lua_pushnumber(L, (*member)->length);
+ return 1;
+}
+
+int larlib_member_type( lua_State *L )
+{
+ lar_member **member = luaL_checkudata( L, 1, "lar.member" );
+ lua_pushnumber(L, (*member)->type);
+ return 1;
+}
+
+int larlib_member_flags( lua_State *L )
+{
+ lar_member **member = luaL_checkudata( L, 1, "lar.member" );
+ lua_pushnumber(L, (*member)->flags);
+ return 1;
+}
+
+int larlib_member_read( lua_State *L )
+{
+ lar_member **member = luaL_checkudata( L, 1, "lar.member" );
+ int start = luaL_checknumber( L, 2 );
+ int length = luaL_optnumber( L, 3, (*member)->length );
+ char *stringcopy;
+
+ if( (start >= 0) && (start < (*member)->length) && (length > 0) )
+ {
+ if( (start + length) >= (*member)->length )
+ length = (*member)->length - start;
+
+ if( (stringcopy = (char *)malloc(length + 1)) != NULL )
+ {
+ memcpy(stringcopy, &(*member)->data[start], length);
+ stringcopy[length] = '\0';
+ lua_pushstring(L, stringcopy);
+ free(stringcopy);
+ }
+ else
+ {
+ return luaL_error(L, "Out of memory");
+ }
+ }
+ else
+ {
+ return larlib_perror(L, "Invalid argument");
+ }
+
+ return 1;
+}
+
+int larlib_member_data( lua_State *L )
+{
+ lar_member **member = luaL_checkudata( L, 1, "lar.member" );
+ lua_pushstring(L, (*member)->data);
+ return 1;
+}
+
+int larlib_member_load( lua_State *L )
+{
+ lar_member **member = luaL_checkudata( L, 1, "lar.member" );
+ int status = luaL_loadbuffer( L, (*member)->data, (*member)->length,
+ "=(lar member)" );
+
+ if( status )
+ {
+ lua_pushnil(L);
+ lua_insert(L, -2);
+ return 2;
+ }
+
+ return 1;
+}
+
+static int larlib_member__gc( lua_State *L )
+{
+ lar_member **member = luaL_checkudata( L, 1, "lar.member" );
+
+ if( *member )
+ lar_close_member(*member);
+
+ *member = NULL;
+ return 0;
+}
+
+
+static int larlib_mmfile__open( lua_State *L, const char *filename )
+{
+ struct stat s;
+ mmap_handle *fh, **udata;
+
+ if( filename == NULL )
+ filename = (const char *)luaL_checkstring( L, 1 );
+
+ if( (fh = (mmap_handle *)malloc(sizeof(mmap_handle))) == NULL )
+ return larlib_perror(L, "Out of memory");
+
+ if( stat(filename, &s) > -1 && (fh->fd = open(filename, O_RDONLY)) > -1 )
+ {
+ fh->length = s.st_size;
+ fh->data = mmap( 0, s.st_size, PROT_READ, MAP_PRIVATE, fh->fd, 0 );
+
+ if( fh->data == MAP_FAILED )
+ return larlib_perror(L, "Failed to mmap() file");
+
+ if( (udata = lua_newuserdata(L, sizeof(char *))) != NULL )
+ {
+ *udata = fh;
+ luaL_getmetatable(L, "lar.mmfile");
+ lua_setmetatable(L, -2);
+ }
+ else
+ {
+ return larlib_perror(L, "Out of memory");
+ }
+ }
+ else
+ {
+ return larlib_perror(L, strerror(errno));
+ }
+
+ return 1;
+}
+
+int larlib_mmfile_open( lua_State *L )
+{
+ return larlib_mmfile__open(L, NULL);
+}
+
+int larlib_mmfile_size( lua_State *L )
+{
+ mmap_handle **fh = luaL_checkudata( L, 1, "lar.mmfile" );
+ lua_pushnumber(L, (*fh)->length);
+ return 1;
+}
+
+int larlib_mmfile_read( lua_State *L )
+{
+ mmap_handle **fh = luaL_checkudata( L, 1, "lar.mmfile" );
+ int start = luaL_checknumber( L, 2 );
+ int length = luaL_optnumber( L, 3, (*fh)->length );
+ char *stringcopy;
+
+ if( (start >= 0) && (start < (*fh)->length) && (length > 0) )
+ {
+ if( (start + length) >= (*fh)->length )
+ length = (*fh)->length - start;
+
+ if( (stringcopy = (char *)malloc(length + 1)) != NULL )
+ {
+ memcpy(stringcopy, &(*fh)->data[start], length);
+ stringcopy[length] = '\0';
+ lua_pushstring(L, stringcopy);
+ free(stringcopy);
+ }
+ else
+ {
+ return luaL_error(L, "Out of memory");
+ }
+ }
+ else
+ {
+ return larlib_perror(L, "Invalid argument");
+ }
+
+ return 1;
+}
+
+int larlib_mmfile_data( lua_State *L )
+{
+ mmap_handle **fh = luaL_checkudata( L, 1, "lar.mmfile" );
+ lua_pushstring(L, (*fh)->data);
+ return 1;
+}
+
+int larlib_mmfile_load( lua_State *L )
+{
+ mmap_handle **fh = luaL_checkudata( L, 1, "lar.mmfile" );
+ int status = luaL_loadbuffer(L, (*fh)->data, (*fh)->length, "=(mmap file)");
+
+ if( status )
+ {
+ lua_pushnil(L);
+ lua_insert(L, -2);
+ return 2;
+ }
+
+ return 1;
+}
+
+static int larlib_mmfile__gc( lua_State *L )
+{
+ mmap_handle **fh = luaL_checkudata( L, 1, "lar.mmfile" );
+
+ if( *fh )
+ {
+ close((*fh)->fd);
+ munmap((*fh)->data, (*fh)->length);
+ free(*fh);
+ *fh = NULL;
+ }
+
+ return 0;
+}
+
+
+int larlib_findfile( lua_State *L )
+{
+ int i;
+ const char *filename = luaL_checkstring( L, 1 );
+ const char *basepath = luaL_optstring( L, 2, "./" );
+ char filepath[1024];
+ struct stat s;
+ lar_archive *ar;
+ lar_member *mb;
+
+ const char *searchpath[3] = { basepath, LUA_LDIR, LUA_CDIR };
+
+ for( i = 0; i < 3; i++ )
+ if( !larlib_mkpath(filename, searchpath[i], filepath) )
+ if( stat(filepath, &s) > -1 && (s.st_mode & S_IFREG) )
+ return larlib_mmfile__open( L, filepath );
+
+ for( i = 0; i < 3; i++ )
+ if( (ar = lar_find_archive(filename, searchpath[i], 0)) != NULL )
+ if( (mb = lar_open_member(ar, filename)) != NULL )
+ return larlib_member__open( L, mb );
+
+ return larlib_perror(L, "File not found");
+}
+
+
+static const luaL_reg LAR_REG[] = {
+ { "open", larlib_open },
+ { "find", larlib_find },
+ { "md5", larlib_md5 },
+ { "md5_file", larlib_md5_file },
+ { "mmap", larlib_mmfile_open },
+ { "findfile", larlib_findfile },
+ { NULL, NULL }
+};
+
+static const luaL_reg LAR_ARCHIVE_REG[] = {
+ { "member", larlib_member_open },
+ { "find", larlib_member_find },
+ { "__gc", larlib__gc },
+ { NULL, NULL }
+};
+
+static const luaL_reg LAR_MEMBER_REG[] = {
+ { "size", larlib_member_size },
+ { "type", larlib_member_type },
+ { "flags", larlib_member_flags },
+ { "read", larlib_member_read },
+ { "data", larlib_member_data },
+ { "load", larlib_member_load },
+ { "__gc", larlib_member__gc },
+ { NULL, NULL }
+};
+
+static const luaL_reg LAR_MMFILE_REG[] = {
+ { "size", larlib_mmfile_size },
+ { "read", larlib_mmfile_read },
+ { "data", larlib_mmfile_data },
+ { "load", larlib_mmfile_load },
+ { "__gc", larlib_mmfile__gc },
+ { NULL, NULL }
+};
+
+
+LUALIB_API int luaopen_larlib( lua_State *L )
+{
+ luaL_newmetatable(L, "lar");
+ luaL_register(L, NULL, LAR_REG);
+ lua_pushvalue(L, -1);
+ lua_setfield(L, -2, "__index");
+ lua_setglobal(L, "lar");
+
+ luaL_newmetatable(L, "lar.archive");
+ luaL_register(L, NULL, LAR_ARCHIVE_REG);
+ lua_pushvalue(L, -1);
+ lua_setfield(L, -2, "__index");
+ lua_setglobal(L, "lar.archive");
+
+ luaL_newmetatable(L, "lar.member");
+ luaL_register(L, NULL, LAR_MEMBER_REG);
+ lua_pushvalue(L, -1);
+ lua_setfield(L, -2, "__index");
+ lua_setglobal(L, "lar.member");
+
+ luaL_newmetatable(L, "lar.mmfile");
+ luaL_register(L, NULL, LAR_MMFILE_REG);
+ lua_pushvalue(L, -1);
+ lua_setfield(L, -2, "__index");
+ lua_setglobal(L, "lar.mmfile");
+
+ return 1;
+}
projects / project / luci.git / blobdiff