Adding LUA

1 files changed, 750 insertions, 0 deletions

diff --git a/lib/lua/src/LuaLib/liolib.c b/lib/lua/src/LuaLib/liolib.c
new file mode 100644
index 0000000..0fe2704
--- /dev/null
+++ b/lib/lua/src/LuaLib/liolib.c
@@ -0,0 +1,750 @@
+/*

+** $Id: liolib.c,v 1.1 2003-11-06 11:56:07 pixel Exp $

+** Standard I/O (and system) library

+** See Copyright Notice in lua.h

+*/

+

+

+#include <errno.h>

+#include <locale.h>

+#include <stdio.h>

+#include <stdlib.h>

+#include <string.h>

+#include <time.h>

+

+#define liolib_c

+

+#include "lua.h"

+

+#include "lauxlib.h"

+#include "lualib.h"

+

+

+

+/*

+** by default, gcc does not get `tmpname'

+*/

+#ifndef USE_TMPNAME

+#ifdef __GNUC__

+#define USE_TMPNAME	0

+#else

+#define USE_TMPNAME	1

+#endif

+#endif

+

+

+/*

+** by default, posix systems get `popen'

+*/

+#ifndef USE_POPEN

+#ifdef _POSIX_C_SOURCE

+#if _POSIX_C_SOURCE >= 2

+#define USE_POPEN	1

+#endif

+#endif

+#endif

+

+#ifndef USE_POPEN

+#define USE_POPEN	0

+#endif

+

+

+

+

+/*

+** {======================================================

+** FILE Operations

+** =======================================================

+*/

+

+

+#if !USE_POPEN

+#define pclose(f)    (-1)

+#endif

+

+

+#define FILEHANDLE		"FILE*"

+

+#define IO_INPUT		"_input"

+#define IO_OUTPUT		"_output"

+

+

+static int pushresult (lua_State *L, int i, const char *filename) {

+  if (i) {

+    lua_pushboolean(L, 1);

+    return 1;

+  }

+  else {

+    lua_pushnil(L);

+    if (filename)

+      lua_pushfstring(L, "%s: %s", filename, strerror(errno));

+    else

+      lua_pushfstring(L, "%s", strerror(errno));

+    lua_pushnumber(L, errno);

+    return 3;

+  }

+}

+

+

+static FILE **topfile (lua_State *L, int findex) {

+  FILE **f = (FILE **)luaL_checkudata(L, findex, FILEHANDLE);

+  if (f == NULL) luaL_argerror(L, findex, "bad file");

+  return f;

+}

+

+

+static int io_type (lua_State *L) {

+  FILE **f = (FILE **)luaL_checkudata(L, 1, FILEHANDLE);

+  if (f == NULL) lua_pushnil(L);

+  else if (*f == NULL)

+    lua_pushliteral(L, "closed file");

+  else

+    lua_pushliteral(L, "file");

+  return 1;

+}

+

+

+static FILE *tofile (lua_State *L, int findex) {

+  FILE **f = topfile(L, findex);

+  if (*f == NULL)

+    luaL_error(L, "attempt to use a closed file");

+  return *f;

+}

+

+

+

+/*

+** When creating file handles, always creates a `closed' file handle

+** before opening the actual file; so, if there is a memory error, the

+** file is not left opened.

+*/

+static FILE **newfile (lua_State *L) {

+  FILE **pf = (FILE **)lua_newuserdata(L, sizeof(FILE *));

+  *pf = NULL;  /* file handle is currently `closed' */

+  luaL_getmetatable(L, FILEHANDLE);

+  lua_setmetatable(L, -2);

+  return pf;

+}

+

+

+/*

+** assumes that top of the stack is the `io' library, and next is

+** the `io' metatable

+*/

+static void registerfile (lua_State *L, FILE *f, const char *name,

+                                                 const char *impname) {

+  lua_pushstring(L, name);

+  *newfile(L) = f;

+  if (impname) {

+    lua_pushstring(L, impname);

+    lua_pushvalue(L, -2);

+    lua_settable(L, -6);  /* metatable[impname] = file */

+  }

+  lua_settable(L, -3);  /* io[name] = file */

+}

+

+

+static int aux_close (lua_State *L) {

+  FILE *f = tofile(L, 1);

+  if (f == stdin || f == stdout || f == stderr)

+    return 0;  /* file cannot be closed */

+  else {

+    int ok = (pclose(f) != -1) || (fclose(f) == 0);

+    if (ok)

+      *(FILE **)lua_touserdata(L, 1) = NULL;  /* mark file as closed */

+    return ok;

+  }

+}

+

+

+static int io_close (lua_State *L) {

+  if (lua_isnone(L, 1)) {

+    lua_pushstring(L, IO_OUTPUT);

+    lua_rawget(L, lua_upvalueindex(1));

+  }

+  return pushresult(L, aux_close(L), NULL);

+}

+

+

+static int io_gc (lua_State *L) {

+  FILE **f = topfile(L, 1);

+  if (*f != NULL)  /* ignore closed files */

+    aux_close(L);

+  return 0;

+}

+

+

+static int io_tostring (lua_State *L) {

+  char buff[32];

+  FILE **f = topfile(L, 1);

+  if (*f == NULL)

+    strcpy(buff, "closed");

+  else

+    sprintf(buff, "%p", lua_touserdata(L, 1));

+  lua_pushfstring(L, "file (%s)", buff);

+  return 1;

+}

+

+

+static int io_open (lua_State *L) {

+  const char *filename = luaL_checkstring(L, 1);

+  const char *mode = luaL_optstring(L, 2, "r");

+  FILE **pf = newfile(L);

+  *pf = fopen(filename, mode);

+  return (*pf == NULL) ? pushresult(L, 0, filename) : 1;

+}

+

+

+static int io_popen (lua_State *L) {

+#if !USE_POPEN

+  luaL_error(L, "`popen' not supported");

+  return 0;

+#else

+  const char *filename = luaL_checkstring(L, 1);

+  const char *mode = luaL_optstring(L, 2, "r");

+  FILE **pf = newfile(L);

+  *pf = popen(filename, mode);

+  return (*pf == NULL) ? pushresult(L, 0, filename) : 1;

+#endif

+}

+

+

+static int io_tmpfile (lua_State *L) {

+  FILE **pf = newfile(L);

+  *pf = tmpfile();

+  return (*pf == NULL) ? pushresult(L, 0, NULL) : 1;

+}

+

+

+static FILE *getiofile (lua_State *L, const char *name) {

+  lua_pushstring(L, name);

+  lua_rawget(L, lua_upvalueindex(1));

+  return tofile(L, -1);

+}

+

+

+static int g_iofile (lua_State *L, const char *name, const char *mode) {

+  if (!lua_isnoneornil(L, 1)) {

+    const char *filename = lua_tostring(L, 1);

+    lua_pushstring(L, name);

+    if (filename) {

+      FILE **pf = newfile(L);

+      *pf = fopen(filename, mode);

+      if (*pf == NULL) {

+        lua_pushfstring(L, "%s: %s", filename, strerror(errno));

+        luaL_argerror(L, 1, lua_tostring(L, -1));

+      }

+    }

+    else {

+      tofile(L, 1);  /* check that it's a valid file handle */

+      lua_pushvalue(L, 1);

+    }

+    lua_rawset(L, lua_upvalueindex(1));

+  }

+  /* return current value */

+  lua_pushstring(L, name);

+  lua_rawget(L, lua_upvalueindex(1));

+  return 1;

+}

+

+

+static int io_input (lua_State *L) {

+  return g_iofile(L, IO_INPUT, "r");

+}

+

+

+static int io_output (lua_State *L) {

+  return g_iofile(L, IO_OUTPUT, "w");

+}

+

+

+static int io_readline (lua_State *L);

+

+

+static void aux_lines (lua_State *L, int idx, int close) {

+  lua_pushliteral(L, FILEHANDLE);

+  lua_rawget(L, LUA_REGISTRYINDEX);

+  lua_pushvalue(L, idx);

+  lua_pushboolean(L, close);  /* close/not close file when finished */

+  lua_pushcclosure(L, io_readline, 3);

+}

+

+

+static int f_lines (lua_State *L) {

+  tofile(L, 1);  /* check that it's a valid file handle */

+  aux_lines(L, 1, 0);

+  return 1;

+}

+

+

+static int io_lines (lua_State *L) {

+  if (lua_isnoneornil(L, 1)) {  /* no arguments? */

+    lua_pushstring(L, IO_INPUT);

+    lua_rawget(L, lua_upvalueindex(1));  /* will iterate over default input */

+    return f_lines(L);

+  }

+  else {

+    const char *filename = luaL_checkstring(L, 1);

+    FILE **pf = newfile(L);

+    *pf = fopen(filename, "r");

+    luaL_argcheck(L, *pf, 1,  strerror(errno));

+    aux_lines(L, lua_gettop(L), 1);

+    return 1;

+  }

+}

+

+

+/*

+** {======================================================

+** READ

+** =======================================================

+*/

+

+

+static int read_number (lua_State *L, FILE *f) {

+  lua_Number d;

+  if (fscanf(f, LUA_NUMBER_SCAN, &d) == 1) {

+    lua_pushnumber(L, d);

+    return 1;

+  }

+  else return 0;  /* read fails */

+}

+

+

+static int test_eof (lua_State *L, FILE *f) {

+  int c = getc(f);

+  ungetc(c, f);

+  lua_pushlstring(L, NULL, 0);

+  return (c != EOF);

+}

+

+

+static int read_line (lua_State *L, FILE *f) {

+  luaL_Buffer b;

+  luaL_buffinit(L, &b);

+  for (;;) {

+    size_t l;

+    char *p = luaL_prepbuffer(&b);

+    if (fgets(p, LUAL_BUFFERSIZE, f) == NULL) {  /* eof? */

+      luaL_pushresult(&b);  /* close buffer */

+      return (lua_strlen(L, -1) > 0);  /* check whether read something */

+    }

+    l = strlen(p);

+    if (p[l-1] != '\n')

+      luaL_addsize(&b, l);

+    else {

+      luaL_addsize(&b, l - 1);  /* do not include `eol' */

+      luaL_pushresult(&b);  /* close buffer */

+      return 1;  /* read at least an `eol' */

+    }

+  }

+}

+

+

+static int read_chars (lua_State *L, FILE *f, size_t n) {

+  size_t rlen;  /* how much to read */

+  size_t nr;  /* number of chars actually read */

+  luaL_Buffer b;

+  luaL_buffinit(L, &b);

+  rlen = LUAL_BUFFERSIZE;  /* try to read that much each time */

+  do {

+    char *p = luaL_prepbuffer(&b);

+    if (rlen > n) rlen = n;  /* cannot read more than asked */

+    nr = fread(p, sizeof(char), rlen, f);

+    luaL_addsize(&b, nr);

+    n -= nr;  /* still have to read `n' chars */

+  } while (n > 0 && nr == rlen);  /* until end of count or eof */

+  luaL_pushresult(&b);  /* close buffer */

+  return (n == 0 || lua_strlen(L, -1) > 0);

+}

+

+

+static int g_read (lua_State *L, FILE *f, int first) {

+  int nargs = lua_gettop(L) - 1;

+  int success;

+  int n;

+  if (nargs == 0) {  /* no arguments? */

+    success = read_line(L, f);

+    n = first+1;  /* to return 1 result */

+  }

+  else {  /* ensure stack space for all results and for auxlib's buffer */

+    luaL_checkstack(L, nargs+LUA_MINSTACK, "too many arguments");

+    success = 1;

+    for (n = first; nargs-- && success; n++) {

+      if (lua_type(L, n) == LUA_TNUMBER) {

+        size_t l = (size_t)lua_tonumber(L, n);

+        success = (l == 0) ? test_eof(L, f) : read_chars(L, f, l);

+      }

+      else {

+        const char *p = lua_tostring(L, n);

+        luaL_argcheck(L, p && p[0] == '*', n, "invalid option");

+        switch (p[1]) {

+          case 'n':  /* number */

+            success = read_number(L, f);

+            break;

+          case 'l':  /* line */

+            success = read_line(L, f);

+            break;

+          case 'a':  /* file */

+            read_chars(L, f, ~((size_t)0));  /* read MAX_SIZE_T chars */

+            success = 1; /* always success */

+            break;

+          case 'w':  /* word */

+            return luaL_error(L, "obsolete option `*w' to `read'");

+          default:

+            return luaL_argerror(L, n, "invalid format");

+        }

+      }

+    }

+  }

+  if (!success) {

+    lua_pop(L, 1);  /* remove last result */

+    lua_pushnil(L);  /* push nil instead */

+  }

+  return n - first;

+}

+

+

+static int io_read (lua_State *L) {

+  return g_read(L, getiofile(L, IO_INPUT), 1);

+}

+

+

+static int f_read (lua_State *L) {

+  return g_read(L, tofile(L, 1), 2);

+}

+

+

+static int io_readline (lua_State *L) {

+  FILE *f = *(FILE **)lua_touserdata(L, lua_upvalueindex(2));

+  if (f == NULL)  /* file is already closed? */

+    luaL_error(L, "file is already closed");

+  if (read_line(L, f)) return 1;

+  else {  /* EOF */

+    if (lua_toboolean(L, lua_upvalueindex(3))) {  /* generator created file? */

+      lua_settop(L, 0);

+      lua_pushvalue(L, lua_upvalueindex(2));

+      aux_close(L);  /* close it */

+    }

+    return 0;

+  }

+}

+

+/* }====================================================== */

+

+

+static int g_write (lua_State *L, FILE *f, int arg) {

+  int nargs = lua_gettop(L) - 1;

+  int status = 1;

+  for (; nargs--; arg++) {

+    if (lua_type(L, arg) == LUA_TNUMBER) {

+      /* optimization: could be done exactly as for strings */

+      status = status &&

+          fprintf(f, LUA_NUMBER_FMT, lua_tonumber(L, arg)) > 0;

+    }

+    else {

+      size_t l;

+      const char *s = luaL_checklstring(L, arg, &l);

+      status = status && (fwrite(s, sizeof(char), l, f) == l);

+    }

+  }

+  return pushresult(L, status, NULL);

+}

+

+

+static int io_write (lua_State *L) {

+  return g_write(L, getiofile(L, IO_OUTPUT), 1);

+}

+

+

+static int f_write (lua_State *L) {

+  return g_write(L, tofile(L, 1), 2);

+}

+

+

+static int f_seek (lua_State *L) {

+  static const int mode[] = {SEEK_SET, SEEK_CUR, SEEK_END};

+  static const char *const modenames[] = {"set", "cur", "end", NULL};

+  FILE *f = tofile(L, 1);

+  int op = luaL_findstring(luaL_optstring(L, 2, "cur"), modenames);

+  long offset = luaL_optlong(L, 3, 0);

+  luaL_argcheck(L, op != -1, 2, "invalid mode");

+  op = fseek(f, offset, mode[op]);

+  if (op)

+    return pushresult(L, 0, NULL);  /* error */

+  else {

+    lua_pushnumber(L, ftell(f));

+    return 1;

+  }

+}

+

+

+static int io_flush (lua_State *L) {

+  return pushresult(L, fflush(getiofile(L, IO_OUTPUT)) == 0, NULL);

+}

+

+

+static int f_flush (lua_State *L) {

+  return pushresult(L, fflush(tofile(L, 1)) == 0, NULL);

+}

+

+

+static const luaL_reg iolib[] = {

+  {"input", io_input},

+  {"output", io_output},

+  {"lines", io_lines},

+  {"close", io_close},

+  {"flush", io_flush},

+  {"open", io_open},

+  {"popen", io_popen},

+  {"read", io_read},

+  {"tmpfile", io_tmpfile},

+  {"type", io_type},

+  {"write", io_write},

+  {NULL, NULL}

+};

+

+

+static const luaL_reg flib[] = {

+  {"flush", f_flush},

+  {"read", f_read},

+  {"lines", f_lines},

+  {"seek", f_seek},

+  {"write", f_write},

+  {"close", io_close},

+  {"__gc", io_gc},

+  {"__tostring", io_tostring},

+  {NULL, NULL}

+};

+

+

+static void createmeta (lua_State *L) {

+  luaL_newmetatable(L, FILEHANDLE);  /* create new metatable for file handles */

+  /* file methods */

+  lua_pushliteral(L, "__index");

+  lua_pushvalue(L, -2);  /* push metatable */

+  lua_rawset(L, -3);  /* metatable.__index = metatable */

+  luaL_openlib(L, NULL, flib, 0);

+}

+

+/* }====================================================== */

+

+

+/*

+** {======================================================

+** Other O.S. Operations

+** =======================================================

+*/

+

+static int io_execute (lua_State *L) {

+  lua_pushnumber(L, system(luaL_checkstring(L, 1)));

+  return 1;

+}

+

+

+static int io_remove (lua_State *L) {

+  const char *filename = luaL_checkstring(L, 1);

+  return pushresult(L, remove(filename) == 0, filename);

+}

+

+

+static int io_rename (lua_State *L) {

+  const char *fromname = luaL_checkstring(L, 1);

+  const char *toname = luaL_checkstring(L, 2);

+  return pushresult(L, rename(fromname, toname) == 0, fromname);

+}

+

+

+static int io_tmpname (lua_State *L) {

+#if !USE_TMPNAME

+  luaL_error(L, "`tmpname' not supported");

+  return 0;

+#else

+  char buff[L_tmpnam];

+  if (tmpnam(buff) != buff)

+    return luaL_error(L, "unable to generate a unique filename in `tmpname'");

+  lua_pushstring(L, buff);

+  return 1;

+#endif

+}

+

+

+static int io_getenv (lua_State *L) {

+  lua_pushstring(L, getenv(luaL_checkstring(L, 1)));  /* if NULL push nil */

+  return 1;

+}

+

+

+static int io_clock (lua_State *L) {

+  lua_pushnumber(L, ((lua_Number)clock())/(lua_Number)CLOCKS_PER_SEC);

+  return 1;

+}

+

+

+/*

+** {======================================================

+** Time/Date operations

+** { year=%Y, month=%m, day=%d, hour=%H, min=%M, sec=%S,

+**   wday=%w+1, yday=%j, isdst=? }

+** =======================================================

+*/

+

+static void setfield (lua_State *L, const char *key, int value) {

+  lua_pushstring(L, key);

+  lua_pushnumber(L, value);

+  lua_rawset(L, -3);

+}

+

+static void setboolfield (lua_State *L, const char *key, int value) {

+  lua_pushstring(L, key);

+  lua_pushboolean(L, value);

+  lua_rawset(L, -3);

+}

+

+static int getboolfield (lua_State *L, const char *key) {

+  int res;

+  lua_pushstring(L, key);

+  lua_gettable(L, -2);

+  res = lua_toboolean(L, -1);

+  lua_pop(L, 1);

+  return res;

+}

+

+

+static int getfield (lua_State *L, const char *key, int d) {

+  int res;

+  lua_pushstring(L, key);

+  lua_gettable(L, -2);

+  if (lua_isnumber(L, -1))

+    res = (int)(lua_tonumber(L, -1));

+  else {

+    if (d == -2)

+      return luaL_error(L, "field `%s' missing in date table", key);

+    res = d;

+  }

+  lua_pop(L, 1);

+  return res;

+}

+

+

+static int io_date (lua_State *L) {

+  const char *s = luaL_optstring(L, 1, "%c");

+  time_t t = (time_t)(luaL_optnumber(L, 2, -1));

+  struct tm *stm;

+  if (t == (time_t)(-1))  /* no time given? */

+    t = time(NULL);  /* use current time */

+  if (*s == '!') {  /* UTC? */

+    stm = gmtime(&t);

+    s++;  /* skip `!' */

+  }

+  else

+    stm = localtime(&t);

+  if (stm == NULL)  /* invalid date? */

+    lua_pushnil(L);

+  else if (strcmp(s, "*t") == 0) {

+    lua_newtable(L);

+    setfield(L, "sec", stm->tm_sec);

+    setfield(L, "min", stm->tm_min);

+    setfield(L, "hour", stm->tm_hour);

+    setfield(L, "day", stm->tm_mday);

+    setfield(L, "month", stm->tm_mon+1);

+    setfield(L, "year", stm->tm_year+1900);

+    setfield(L, "wday", stm->tm_wday+1);

+    setfield(L, "yday", stm->tm_yday+1);

+    setboolfield(L, "isdst", stm->tm_isdst);

+  }

+  else {

+    char b[256];

+    if (strftime(b, sizeof(b), s, stm))

+      lua_pushstring(L, b);

+    else

+      return luaL_error(L, "`date' format too long");

+  }

+  return 1;

+}

+

+

+static int io_time (lua_State *L) {

+  if (lua_isnoneornil(L, 1))  /* called without args? */

+    lua_pushnumber(L, time(NULL));  /* return current time */

+  else {

+    time_t t;

+    struct tm ts;

+    luaL_checktype(L, 1, LUA_TTABLE);

+    lua_settop(L, 1);  /* make sure table is at the top */

+    ts.tm_sec = getfield(L, "sec", 0);

+    ts.tm_min = getfield(L, "min", 0);

+    ts.tm_hour = getfield(L, "hour", 12);

+    ts.tm_mday = getfield(L, "day", -2);

+    ts.tm_mon = getfield(L, "month", -2) - 1;

+    ts.tm_year = getfield(L, "year", -2) - 1900;

+    ts.tm_isdst = getboolfield(L, "isdst");

+    t = mktime(&ts);

+    if (t == (time_t)(-1))

+      lua_pushnil(L);

+    else

+      lua_pushnumber(L, t);

+  }

+  return 1;

+}

+

+

+static int io_difftime (lua_State *L) {

+  lua_pushnumber(L, difftime((time_t)(luaL_checknumber(L, 1)),

+                             (time_t)(luaL_optnumber(L, 2, 0))));

+  return 1;

+}

+

+/* }====================================================== */

+

+

+static int io_setloc (lua_State *L) {

+  static const int cat[] = {LC_ALL, LC_COLLATE, LC_CTYPE, LC_MONETARY,

+                      LC_NUMERIC, LC_TIME};

+  static const char *const catnames[] = {"all", "collate", "ctype", "monetary",

+     "numeric", "time", NULL};

+  const char *l = lua_tostring(L, 1);

+  int op = luaL_findstring(luaL_optstring(L, 2, "all"), catnames);

+  luaL_argcheck(L, l || lua_isnoneornil(L, 1), 1, "string expected");

+  luaL_argcheck(L, op != -1, 2, "invalid option");

+  lua_pushstring(L, setlocale(cat[op], l));

+  return 1;

+}

+

+

+static int io_exit (lua_State *L) {

+  exit(luaL_optint(L, 1, EXIT_SUCCESS));

+  return 0;  /* to avoid warnings */

+}

+

+static const luaL_reg syslib[] = {

+  {"clock",     io_clock},

+  {"date",      io_date},

+  {"difftime",  io_difftime},

+  {"execute",   io_execute},

+  {"exit",      io_exit},

+  {"getenv",    io_getenv},

+  {"remove",    io_remove},

+  {"rename",    io_rename},

+  {"setlocale", io_setloc},

+  {"time",      io_time},

+  {"tmpname",   io_tmpname},

+  {NULL, NULL}

+};

+

+/* }====================================================== */

+

+

+

+LUALIB_API int luaopen_io (lua_State *L) {

+  luaL_openlib(L, LUA_OSLIBNAME, syslib, 0);

+  createmeta(L);

+  lua_pushvalue(L, -1);

+  luaL_openlib(L, LUA_IOLIBNAME, iolib, 1);

+  /* put predefined file handles into `io' table */

+  registerfile(L, stdin, "stdin", IO_INPUT);

+  registerfile(L, stdout, "stdout", IO_OUTPUT);

+  registerfile(L, stderr, "stderr", NULL);

+  return 1;

+}

+