+++ /dev/null
-/*\r
-** $Id: liolib.c,v 2.112.1.1 2013/04/12 18:48:47 roberto Exp $\r
-** Standard I/O (and system) library\r
-** See Copyright Notice in lua.h\r
-*/\r
-\r
-\r
-/*\r
-** This definition must come before the inclusion of 'stdio.h'; it\r
-** should not affect non-POSIX systems\r
-*/\r
-#if !defined(_FILE_OFFSET_BITS)\r
-#define _LARGEFILE_SOURCE 1\r
-#define _FILE_OFFSET_BITS 64\r
-#endif\r
-\r
-\r
-#include <errno.h>\r
-#include <stdio.h>\r
-#include <stdlib.h>\r
-#include <string.h>\r
-\r
-#define liolib_c\r
-#define LUA_LIB\r
-\r
-#include "lua.h"\r
-\r
-#include "lauxlib.h"\r
-#include "lualib.h"\r
-\r
-\r
-#if !defined(lua_checkmode)\r
-\r
-/*\r
-** Check whether 'mode' matches '[rwa]%+?b?'.\r
-** Change this macro to accept other modes for 'fopen' besides\r
-** the standard ones.\r
-*/\r
-#define lua_checkmode(mode) \\r
- (*mode != '\0' && strchr("rwa", *(mode++)) != NULL && \\r
- (*mode != '+' || ++mode) && /* skip if char is '+' */ \\r
- (*mode != 'b' || ++mode) && /* skip if char is 'b' */ \\r
- (*mode == '\0'))\r
-\r
-#endif\r
-\r
-/*\r
-** {======================================================\r
-** lua_popen spawns a new process connected to the current\r
-** one through the file streams.\r
-** =======================================================\r
-*/\r
-\r
-#if !defined(lua_popen) /* { */\r
-\r
-#if defined(LUA_USE_POPEN) /* { */\r
-\r
-#define lua_popen(L,c,m) ((void)L, fflush(NULL), popen(c,m))\r
-#define lua_pclose(L,file) ((void)L, pclose(file))\r
-\r
-#elif defined(LUA_WIN) /* }{ */\r
-\r
-#define lua_popen(L,c,m) ((void)L, _popen(c,m))\r
-#define lua_pclose(L,file) ((void)L, _pclose(file))\r
-\r
-\r
-#else /* }{ */\r
-\r
-#define lua_popen(L,c,m) ((void)((void)c, m), \\r
- luaL_error(L, LUA_QL("popen") " not supported"), (FILE*)0)\r
-#define lua_pclose(L,file) ((void)((void)L, file), -1)\r
-\r
-\r
-#endif /* } */\r
-\r
-#endif /* } */\r
-\r
-/* }====================================================== */\r
-\r
-\r
-/*\r
-** {======================================================\r
-** lua_fseek: configuration for longer offsets\r
-** =======================================================\r
-*/\r
-\r
-#if !defined(lua_fseek) && !defined(LUA_ANSI) /* { */\r
-\r
-#if defined(LUA_USE_POSIX) /* { */\r
-\r
-#define l_fseek(f,o,w) fseeko(f,o,w)\r
-#define l_ftell(f) ftello(f)\r
-#define l_seeknum off_t\r
-\r
-#elif defined(LUA_WIN) && !defined(_CRTIMP_TYPEINFO) \\r
- && defined(_MSC_VER) && (_MSC_VER >= 1400) /* }{ */\r
-/* Windows (but not DDK) and Visual C++ 2005 or higher */\r
-\r
-#define l_fseek(f,o,w) _fseeki64(f,o,w)\r
-#define l_ftell(f) _ftelli64(f)\r
-#define l_seeknum __int64\r
-\r
-#endif /* } */\r
-\r
-#endif /* } */\r
-\r
-\r
-#if !defined(l_fseek) /* default definitions */\r
-#define l_fseek(f,o,w) fseek(f,o,w)\r
-#define l_ftell(f) ftell(f)\r
-#define l_seeknum long\r
-#endif\r
-\r
-/* }====================================================== */\r
-\r
-\r
-#define IO_PREFIX "_IO_"\r
-#define IO_INPUT (IO_PREFIX "input")\r
-#define IO_OUTPUT (IO_PREFIX "output")\r
-\r
-\r
-typedef luaL_Stream LStream;\r
-\r
-\r
-#define tolstream(L) ((LStream *)luaL_checkudata(L, 1, LUA_FILEHANDLE))\r
-\r
-#define isclosed(p) ((p)->closef == NULL)\r
-\r
-\r
-static int io_type (lua_State *L) {\r
- LStream *p;\r
- luaL_checkany(L, 1);\r
- p = (LStream *)luaL_testudata(L, 1, LUA_FILEHANDLE);\r
- if (p == NULL)\r
- lua_pushnil(L); /* not a file */\r
- else if (isclosed(p))\r
- lua_pushliteral(L, "closed file");\r
- else\r
- lua_pushliteral(L, "file");\r
- return 1;\r
-}\r
-\r
-\r
-static int f_tostring (lua_State *L) {\r
- LStream *p = tolstream(L);\r
- if (isclosed(p))\r
- lua_pushliteral(L, "file (closed)");\r
- else\r
- lua_pushfstring(L, "file (%p)", p->f);\r
- return 1;\r
-}\r
-\r
-\r
-static FILE *tofile (lua_State *L) {\r
- LStream *p = tolstream(L);\r
- if (isclosed(p))\r
- luaL_error(L, "attempt to use a closed file");\r
- lua_assert(p->f);\r
- return p->f;\r
-}\r
-\r
-\r
-/*\r
-** When creating file handles, always creates a `closed' file handle\r
-** before opening the actual file; so, if there is a memory error, the\r
-** file is not left opened.\r
-*/\r
-static LStream *newprefile (lua_State *L) {\r
- LStream *p = (LStream *)lua_newuserdata(L, sizeof(LStream));\r
- p->closef = NULL; /* mark file handle as 'closed' */\r
- luaL_setmetatable(L, LUA_FILEHANDLE);\r
- return p;\r
-}\r
-\r
-\r
-static int aux_close (lua_State *L) {\r
- LStream *p = tolstream(L);\r
- lua_CFunction cf = p->closef;\r
- p->closef = NULL; /* mark stream as closed */\r
- return (*cf)(L); /* close it */\r
-}\r
-\r
-\r
-static int io_close (lua_State *L) {\r
- if (lua_isnone(L, 1)) /* no argument? */\r
- lua_getfield(L, LUA_REGISTRYINDEX, IO_OUTPUT); /* use standard output */\r
- tofile(L); /* make sure argument is an open stream */\r
- return aux_close(L);\r
-}\r
-\r
-\r
-static int f_gc (lua_State *L) {\r
- LStream *p = tolstream(L);\r
- if (!isclosed(p) && p->f != NULL)\r
- aux_close(L); /* ignore closed and incompletely open files */\r
- return 0;\r
-}\r
-\r
-\r
-/*\r
-** function to close regular files\r
-*/\r
-static int io_fclose (lua_State *L) {\r
- LStream *p = tolstream(L);\r
- int res = fclose(p->f);\r
- return luaL_fileresult(L, (res == 0), NULL);\r
-}\r
-\r
-\r
-static LStream *newfile (lua_State *L) {\r
- LStream *p = newprefile(L);\r
- p->f = NULL;\r
- p->closef = &io_fclose;\r
- return p;\r
-}\r
-\r
-\r
-static void opencheck (lua_State *L, const char *fname, const char *mode) {\r
- LStream *p = newfile(L);\r
- p->f = fopen(fname, mode);\r
- if (p->f == NULL)\r
- luaL_error(L, "cannot open file " LUA_QS " (%s)", fname, strerror(errno));\r
-}\r
-\r
-\r
-static int io_open (lua_State *L) {\r
- const char *filename = luaL_checkstring(L, 1);\r
- const char *mode = luaL_optstring(L, 2, "r");\r
- LStream *p = newfile(L);\r
- const char *md = mode; /* to traverse/check mode */\r
- luaL_argcheck(L, lua_checkmode(md), 2, "invalid mode");\r
- p->f = fopen(filename, mode);\r
- return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1;\r
-}\r
-\r
-\r
-/*\r
-** function to close 'popen' files\r
-*/\r
-static int io_pclose (lua_State *L) {\r
- LStream *p = tolstream(L);\r
- return luaL_execresult(L, lua_pclose(L, p->f));\r
-}\r
-\r
-\r
-static int io_popen (lua_State *L) {\r
- const char *filename = luaL_checkstring(L, 1);\r
- const char *mode = luaL_optstring(L, 2, "r");\r
- LStream *p = newprefile(L);\r
- p->f = lua_popen(L, filename, mode);\r
- p->closef = &io_pclose;\r
- return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1;\r
-}\r
-\r
-\r
-static int io_tmpfile (lua_State *L) {\r
- LStream *p = newfile(L);\r
- p->f = tmpfile();\r
- return (p->f == NULL) ? luaL_fileresult(L, 0, NULL) : 1;\r
-}\r
-\r
-\r
-static FILE *getiofile (lua_State *L, const char *findex) {\r
- LStream *p;\r
- lua_getfield(L, LUA_REGISTRYINDEX, findex);\r
- p = (LStream *)lua_touserdata(L, -1);\r
- if (isclosed(p))\r
- luaL_error(L, "standard %s file is closed", findex + strlen(IO_PREFIX));\r
- return p->f;\r
-}\r
-\r
-\r
-static int g_iofile (lua_State *L, const char *f, const char *mode) {\r
- if (!lua_isnoneornil(L, 1)) {\r
- const char *filename = lua_tostring(L, 1);\r
- if (filename)\r
- opencheck(L, filename, mode);\r
- else {\r
- tofile(L); /* check that it's a valid file handle */\r
- lua_pushvalue(L, 1);\r
- }\r
- lua_setfield(L, LUA_REGISTRYINDEX, f);\r
- }\r
- /* return current value */\r
- lua_getfield(L, LUA_REGISTRYINDEX, f);\r
- return 1;\r
-}\r
-\r
-\r
-static int io_input (lua_State *L) {\r
- return g_iofile(L, IO_INPUT, "r");\r
-}\r
-\r
-\r
-static int io_output (lua_State *L) {\r
- return g_iofile(L, IO_OUTPUT, "w");\r
-}\r
-\r
-\r
-static int io_readline (lua_State *L);\r
-\r
-\r
-static void aux_lines (lua_State *L, int toclose) {\r
- int i;\r
- int n = lua_gettop(L) - 1; /* number of arguments to read */\r
- /* ensure that arguments will fit here and into 'io_readline' stack */\r
- luaL_argcheck(L, n <= LUA_MINSTACK - 3, LUA_MINSTACK - 3, "too many options");\r
- lua_pushvalue(L, 1); /* file handle */\r
- lua_pushinteger(L, n); /* number of arguments to read */\r
- lua_pushboolean(L, toclose); /* close/not close file when finished */\r
- for (i = 1; i <= n; i++) lua_pushvalue(L, i + 1); /* copy arguments */\r
- lua_pushcclosure(L, io_readline, 3 + n);\r
-}\r
-\r
-\r
-static int f_lines (lua_State *L) {\r
- tofile(L); /* check that it's a valid file handle */\r
- aux_lines(L, 0);\r
- return 1;\r
-}\r
-\r
-\r
-static int io_lines (lua_State *L) {\r
- int toclose;\r
- if (lua_isnone(L, 1)) lua_pushnil(L); /* at least one argument */\r
- if (lua_isnil(L, 1)) { /* no file name? */\r
- lua_getfield(L, LUA_REGISTRYINDEX, IO_INPUT); /* get default input */\r
- lua_replace(L, 1); /* put it at index 1 */\r
- tofile(L); /* check that it's a valid file handle */\r
- toclose = 0; /* do not close it after iteration */\r
- }\r
- else { /* open a new file */\r
- const char *filename = luaL_checkstring(L, 1);\r
- opencheck(L, filename, "r");\r
- lua_replace(L, 1); /* put file at index 1 */\r
- toclose = 1; /* close it after iteration */\r
- }\r
- aux_lines(L, toclose);\r
- return 1;\r
-}\r
-\r
-\r
-/*\r
-** {======================================================\r
-** READ\r
-** =======================================================\r
-*/\r
-\r
-\r
-static int read_number (lua_State *L, FILE *f) {\r
- lua_Number d;\r
- if (fscanf(f, LUA_NUMBER_SCAN, &d) == 1) {\r
- lua_pushnumber(L, d);\r
- return 1;\r
- }\r
- else {\r
- lua_pushnil(L); /* "result" to be removed */\r
- return 0; /* read fails */\r
- }\r
-}\r
-\r
-\r
-static int test_eof (lua_State *L, FILE *f) {\r
- int c = getc(f);\r
- ungetc(c, f);\r
- lua_pushlstring(L, NULL, 0);\r
- return (c != EOF);\r
-}\r
-\r
-\r
-static int read_line (lua_State *L, FILE *f, int chop) {\r
- luaL_Buffer b;\r
- luaL_buffinit(L, &b);\r
- for (;;) {\r
- size_t l;\r
- char *p = luaL_prepbuffer(&b);\r
- if (fgets(p, LUAL_BUFFERSIZE, f) == NULL) { /* eof? */\r
- luaL_pushresult(&b); /* close buffer */\r
- return (lua_rawlen(L, -1) > 0); /* check whether read something */\r
- }\r
- l = strlen(p);\r
- if (l == 0 || p[l-1] != '\n')\r
- luaL_addsize(&b, l);\r
- else {\r
- luaL_addsize(&b, l - chop); /* chop 'eol' if needed */\r
- luaL_pushresult(&b); /* close buffer */\r
- return 1; /* read at least an `eol' */\r
- }\r
- }\r
-}\r
-\r
-\r
-#define MAX_SIZE_T (~(size_t)0)\r
-\r
-static void read_all (lua_State *L, FILE *f) {\r
- size_t rlen = LUAL_BUFFERSIZE; /* how much to read in each cycle */\r
- luaL_Buffer b;\r
- luaL_buffinit(L, &b);\r
- for (;;) {\r
- char *p = luaL_prepbuffsize(&b, rlen);\r
- size_t nr = fread(p, sizeof(char), rlen, f);\r
- luaL_addsize(&b, nr);\r
- if (nr < rlen) break; /* eof? */\r
- else if (rlen <= (MAX_SIZE_T / 4)) /* avoid buffers too large */\r
- rlen *= 2; /* double buffer size at each iteration */\r
- }\r
- luaL_pushresult(&b); /* close buffer */\r
-}\r
-\r
-\r
-static int read_chars (lua_State *L, FILE *f, size_t n) {\r
- size_t nr; /* number of chars actually read */\r
- char *p;\r
- luaL_Buffer b;\r
- luaL_buffinit(L, &b);\r
- p = luaL_prepbuffsize(&b, n); /* prepare buffer to read whole block */\r
- nr = fread(p, sizeof(char), n, f); /* try to read 'n' chars */\r
- luaL_addsize(&b, nr);\r
- luaL_pushresult(&b); /* close buffer */\r
- return (nr > 0); /* true iff read something */\r
-}\r
-\r
-\r
-static int g_read (lua_State *L, FILE *f, int first) {\r
- int nargs = lua_gettop(L) - 1;\r
- int success;\r
- int n;\r
- clearerr(f);\r
- if (nargs == 0) { /* no arguments? */\r
- success = read_line(L, f, 1);\r
- n = first+1; /* to return 1 result */\r
- }\r
- else { /* ensure stack space for all results and for auxlib's buffer */\r
- luaL_checkstack(L, nargs+LUA_MINSTACK, "too many arguments");\r
- success = 1;\r
- for (n = first; nargs-- && success; n++) {\r
- if (lua_type(L, n) == LUA_TNUMBER) {\r
- size_t l = (size_t)lua_tointeger(L, n);\r
- success = (l == 0) ? test_eof(L, f) : read_chars(L, f, l);\r
- }\r
- else {\r
- const char *p = lua_tostring(L, n);\r
- luaL_argcheck(L, p && p[0] == '*', n, "invalid option");\r
- switch (p[1]) {\r
- case 'n': /* number */\r
- success = read_number(L, f);\r
- break;\r
- case 'l': /* line */\r
- success = read_line(L, f, 1);\r
- break;\r
- case 'L': /* line with end-of-line */\r
- success = read_line(L, f, 0);\r
- break;\r
- case 'a': /* file */\r
- read_all(L, f); /* read entire file */\r
- success = 1; /* always success */\r
- break;\r
- default:\r
- return luaL_argerror(L, n, "invalid format");\r
- }\r
- }\r
- }\r
- }\r
- if (ferror(f))\r
- return luaL_fileresult(L, 0, NULL);\r
- if (!success) {\r
- lua_pop(L, 1); /* remove last result */\r
- lua_pushnil(L); /* push nil instead */\r
- }\r
- return n - first;\r
-}\r
-\r
-\r
-static int io_read (lua_State *L) {\r
- return g_read(L, getiofile(L, IO_INPUT), 1);\r
-}\r
-\r
-\r
-static int f_read (lua_State *L) {\r
- return g_read(L, tofile(L), 2);\r
-}\r
-\r
-\r
-static int io_readline (lua_State *L) {\r
- LStream *p = (LStream *)lua_touserdata(L, lua_upvalueindex(1));\r
- int i;\r
- int n = (int)lua_tointeger(L, lua_upvalueindex(2));\r
- if (isclosed(p)) /* file is already closed? */\r
- return luaL_error(L, "file is already closed");\r
- lua_settop(L , 1);\r
- for (i = 1; i <= n; i++) /* push arguments to 'g_read' */\r
- lua_pushvalue(L, lua_upvalueindex(3 + i));\r
- n = g_read(L, p->f, 2); /* 'n' is number of results */\r
- lua_assert(n > 0); /* should return at least a nil */\r
- if (!lua_isnil(L, -n)) /* read at least one value? */\r
- return n; /* return them */\r
- else { /* first result is nil: EOF or error */\r
- if (n > 1) { /* is there error information? */\r
- /* 2nd result is error message */\r
- return luaL_error(L, "%s", lua_tostring(L, -n + 1));\r
- }\r
- if (lua_toboolean(L, lua_upvalueindex(3))) { /* generator created file? */\r
- lua_settop(L, 0);\r
- lua_pushvalue(L, lua_upvalueindex(1));\r
- aux_close(L); /* close it */\r
- }\r
- return 0;\r
- }\r
-}\r
-\r
-/* }====================================================== */\r
-\r
-\r
-static int g_write (lua_State *L, FILE *f, int arg) {\r
- int nargs = lua_gettop(L) - arg;\r
- int status = 1;\r
- for (; nargs--; arg++) {\r
- if (lua_type(L, arg) == LUA_TNUMBER) {\r
- /* optimization: could be done exactly as for strings */\r
- status = status &&\r
- fprintf(f, LUA_NUMBER_FMT, lua_tonumber(L, arg)) > 0;\r
- }\r
- else {\r
- size_t l;\r
- const char *s = luaL_checklstring(L, arg, &l);\r
- status = status && (fwrite(s, sizeof(char), l, f) == l);\r
- }\r
- }\r
- if (status) return 1; /* file handle already on stack top */\r
- else return luaL_fileresult(L, status, NULL);\r
-}\r
-\r
-\r
-static int io_write (lua_State *L) {\r
- return g_write(L, getiofile(L, IO_OUTPUT), 1);\r
-}\r
-\r
-\r
-static int f_write (lua_State *L) {\r
- FILE *f = tofile(L);\r
- lua_pushvalue(L, 1); /* push file at the stack top (to be returned) */\r
- return g_write(L, f, 2);\r
-}\r
-\r
-\r
-static int f_seek (lua_State *L) {\r
- static const int mode[] = {SEEK_SET, SEEK_CUR, SEEK_END};\r
- static const char *const modenames[] = {"set", "cur", "end", NULL};\r
- FILE *f = tofile(L);\r
- int op = luaL_checkoption(L, 2, "cur", modenames);\r
- lua_Number p3 = luaL_optnumber(L, 3, 0);\r
- l_seeknum offset = (l_seeknum)p3;\r
- luaL_argcheck(L, (lua_Number)offset == p3, 3,\r
- "not an integer in proper range");\r
- op = l_fseek(f, offset, mode[op]);\r
- if (op)\r
- return luaL_fileresult(L, 0, NULL); /* error */\r
- else {\r
- lua_pushnumber(L, (lua_Number)l_ftell(f));\r
- return 1;\r
- }\r
-}\r
-\r
-\r
-static int f_setvbuf (lua_State *L) {\r
- static const int mode[] = {_IONBF, _IOFBF, _IOLBF};\r
- static const char *const modenames[] = {"no", "full", "line", NULL};\r
- FILE *f = tofile(L);\r
- int op = luaL_checkoption(L, 2, NULL, modenames);\r
- lua_Integer sz = luaL_optinteger(L, 3, LUAL_BUFFERSIZE);\r
- int res = setvbuf(f, NULL, mode[op], sz);\r
- return luaL_fileresult(L, res == 0, NULL);\r
-}\r
-\r
-\r
-\r
-static int io_flush (lua_State *L) {\r
- return luaL_fileresult(L, fflush(getiofile(L, IO_OUTPUT)) == 0, NULL);\r
-}\r
-\r
-\r
-static int f_flush (lua_State *L) {\r
- return luaL_fileresult(L, fflush(tofile(L)) == 0, NULL);\r
-}\r
-\r
-\r
-/*\r
-** functions for 'io' library\r
-*/\r
-static const luaL_Reg iolib[] = {\r
- {"close", io_close},\r
- {"flush", io_flush},\r
- {"input", io_input},\r
- {"lines", io_lines},\r
- {"open", io_open},\r
- {"output", io_output},\r
- {"popen", io_popen},\r
- {"read", io_read},\r
- {"tmpfile", io_tmpfile},\r
- {"type", io_type},\r
- {"write", io_write},\r
- {NULL, NULL}\r
-};\r
-\r
-\r
-/*\r
-** methods for file handles\r
-*/\r
-static const luaL_Reg flib[] = {\r
- {"close", io_close},\r
- {"flush", f_flush},\r
- {"lines", f_lines},\r
- {"read", f_read},\r
- {"seek", f_seek},\r
- {"setvbuf", f_setvbuf},\r
- {"write", f_write},\r
- {"__gc", f_gc},\r
- {"__tostring", f_tostring},\r
- {NULL, NULL}\r
-};\r
-\r
-\r
-static void createmeta (lua_State *L) {\r
- luaL_newmetatable(L, LUA_FILEHANDLE); /* create metatable for file handles */\r
- lua_pushvalue(L, -1); /* push metatable */\r
- lua_setfield(L, -2, "__index"); /* metatable.__index = metatable */\r
- luaL_setfuncs(L, flib, 0); /* add file methods to new metatable */\r
- lua_pop(L, 1); /* pop new metatable */\r
-}\r
-\r
-\r
-/*\r
-** function to (not) close the standard files stdin, stdout, and stderr\r
-*/\r
-static int io_noclose (lua_State *L) {\r
- LStream *p = tolstream(L);\r
- p->closef = &io_noclose; /* keep file opened */\r
- lua_pushnil(L);\r
- lua_pushliteral(L, "cannot close standard file");\r
- return 2;\r
-}\r
-\r
-\r
-static void createstdfile (lua_State *L, FILE *f, const char *k,\r
- const char *fname) {\r
- LStream *p = newprefile(L);\r
- p->f = f;\r
- p->closef = &io_noclose;\r
- if (k != NULL) {\r
- lua_pushvalue(L, -1);\r
- lua_setfield(L, LUA_REGISTRYINDEX, k); /* add file to registry */\r
- }\r
- lua_setfield(L, -2, fname); /* add file to module */\r
-}\r
-\r
-\r
-LUAMOD_API int luaopen_io (lua_State *L) {\r
- luaL_newlib(L, iolib); /* new module */\r
- createmeta(L);\r
- /* create (and set) default files */\r
- createstdfile(L, stdin, IO_INPUT, "stdin");\r
- createstdfile(L, stdout, IO_OUTPUT, "stdout");\r
- createstdfile(L, stderr, NULL, "stderr");\r
- return 1;\r
-}\r
-\r
projects / mirror_edk2.git / blobdiff