Imported from /srv/lorry/lorry-area/swig-tarball/swig-1.3.40.tar.gz.HEADswig-1.3.40master

1 files changed, 439 insertions, 0 deletions

diff --git a/Examples/lua/lua.c b/Examples/lua/lua.c
new file mode 100644
index 0000000..b0c0729
--- /dev/null
+++ b/Examples/lua/lua.c
@@ -0,0 +1,439 @@
+/*
+** $Id: lua.c 7470 2005-09-20 19:35:23Z wsfulton $
+** Lua stand-alone interpreter
+** See Copyright Notice in lua.h
+*/
+
+
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define lua_c
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+/*
+** generic extra include file
+*/
+#ifdef LUA_USERCONFIG
+#include LUA_USERCONFIG
+#endif
+
+
+/*
+** definition of `isatty'
+*/
+#ifdef _POSIX_C_SOURCE
+#include <unistd.h>
+#define stdin_is_tty()	isatty(0)
+#else
+#define stdin_is_tty()	1  /* assume stdin is a tty */
+#endif
+
+
+
+#ifndef PROMPT
+#define PROMPT		"> "
+#endif
+
+
+#ifndef PROMPT2
+#define PROMPT2		">> "
+#endif
+
+#ifndef PROGNAME
+#define PROGNAME	"lua"
+#endif
+
+#ifndef lua_userinit
+#define lua_userinit(L)		openstdlibs(L)
+#endif
+
+
+#ifndef LUA_EXTRALIBS
+#define LUA_EXTRALIBS	/* empty */
+#endif
+
+
+static lua_State *L = NULL;
+
+static const char *progname = PROGNAME;
+
+extern int Example_Init(lua_State* L);
+
+static const luaL_reg lualibs[] = {
+  {"base", luaopen_base},
+  {"table", luaopen_table},
+  {"io", luaopen_io},
+  {"string", luaopen_string},
+  {"math", luaopen_math},
+  {"debug", luaopen_debug},
+  {"loadlib", luaopen_loadlib},
+  /* add your libraries here */
+  {"example", Example_Init},
+  LUA_EXTRALIBS
+  {NULL, NULL}
+};
+
+
+
+static void lstop (lua_State *l, lua_Debug *ar) {
+  (void)ar;  /* unused arg. */
+  lua_sethook(l, NULL, 0, 0);
+  luaL_error(l, "interrupted!");
+}
+
+
+static void laction (int i) {
+  signal(i, SIG_DFL); /* if another SIGINT happens before lstop,
+                              terminate process (default action) */
+  lua_sethook(L, lstop, LUA_MASKCALL | LUA_MASKRET | LUA_MASKCOUNT, 1);
+}
+
+
+static void print_usage (void) {
+  fprintf(stderr,
+  "usage: %s [options] [script [args]].\n"
+  "Available options are:\n"
+  "  -        execute stdin as a file\n"
+  "  -e stat  execute string `stat'\n"
+  "  -i       enter interactive mode after executing `script'\n"
+  "  -l name  load and run library `name'\n"
+  "  -v       show version information\n"
+  "  --       stop handling options\n" ,
+  progname);
+}
+
+
+static void l_message (const char *pname, const char *msg) {
+  if (pname) fprintf(stderr, "%s: ", pname);
+  fprintf(stderr, "%s\n", msg);
+}
+
+
+static int report (int status) {
+  const char *msg;
+  if (status) {
+    msg = lua_tostring(L, -1);
+    if (msg == NULL) msg = "(error with no message)";
+    l_message(progname, msg);
+    lua_pop(L, 1);
+  }
+  return status;
+}
+
+
+static int lcall (int narg, int clear) {
+  int status;
+  int base = lua_gettop(L) - narg;  /* function index */
+  lua_pushliteral(L, "_TRACEBACK");
+  lua_rawget(L, LUA_GLOBALSINDEX);  /* get traceback function */
+  lua_insert(L, base);  /* put it under chunk and args */
+  signal(SIGINT, laction);
+  status = lua_pcall(L, narg, (clear ? 0 : LUA_MULTRET), base);
+  signal(SIGINT, SIG_DFL);
+  lua_remove(L, base);  /* remove traceback function */
+  return status;
+}
+
+
+static void print_version (void) {
+  l_message(NULL, LUA_VERSION "  " LUA_COPYRIGHT);
+}
+
+
+static void getargs (char *argv[], int n) {
+  int i;
+  lua_newtable(L);
+  for (i=0; argv[i]; i++) {
+    lua_pushnumber(L, i - n);
+    lua_pushstring(L, argv[i]);
+    lua_rawset(L, -3);
+  }
+  /* arg.n = maximum index in table `arg' */
+  lua_pushliteral(L, "n");
+  lua_pushnumber(L, i-n-1);
+  lua_rawset(L, -3);
+}
+
+
+static int docall (int status) {
+  if (status == 0) status = lcall(0, 1);
+  return report(status);
+}
+
+
+static int file_input (const char *name) {
+  return docall(luaL_loadfile(L, name));
+}
+
+
+static int dostring (const char *s, const char *name) {
+  return docall(luaL_loadbuffer(L, s, strlen(s), name));
+}
+
+
+static int load_file (const char *name) {
+  lua_pushliteral(L, "require");
+  lua_rawget(L, LUA_GLOBALSINDEX);
+  if (!lua_isfunction(L, -1)) {  /* no `require' defined? */
+    lua_pop(L, 1);
+    return file_input(name);
+  }
+  else {
+    lua_pushstring(L, name);
+    return report(lcall(1, 1));
+  }
+}
+
+
+/*
+** this macro can be used by some `history' system to save lines
+** read in manual input
+*/
+#ifndef lua_saveline
+#define lua_saveline(L,line)	/* empty */
+#endif
+
+
+/*
+** this macro defines a function to show the prompt and reads the
+** next line for manual input
+*/
+#ifndef lua_readline
+#define lua_readline(L,prompt)		readline(L,prompt)
+
+/* maximum length of an input line */
+#ifndef MAXINPUT
+#define MAXINPUT	512
+#endif
+
+
+static int readline (lua_State *l, const char *prompt) {
+  static char buffer[MAXINPUT];
+  if (prompt) {
+    fputs(prompt, stdout);
+    fflush(stdout);
+  }
+  if (fgets(buffer, sizeof(buffer), stdin) == NULL)
+    return 0;  /* read fails */
+  else {
+    lua_pushstring(l, buffer);
+    return 1;
+  }
+}
+
+#endif
+
+
+static const char *get_prompt (int firstline) {
+  const char *p = NULL;
+  lua_pushstring(L, firstline ? "_PROMPT" : "_PROMPT2");
+  lua_rawget(L, LUA_GLOBALSINDEX);
+  p = lua_tostring(L, -1);
+  if (p == NULL) p = (firstline ? PROMPT : PROMPT2);
+  lua_pop(L, 1);  /* remove global */
+  return p;
+}
+
+
+static int incomplete (int status) {
+  if (status == LUA_ERRSYNTAX &&
+         strstr(lua_tostring(L, -1), "near `<eof>'") != NULL) {
+    lua_pop(L, 1);
+    return 1;
+  }
+  else
+    return 0;
+}
+
+
+static int load_string (void) {
+  int status;
+  lua_settop(L, 0);
+  if (lua_readline(L, get_prompt(1)) == 0)  /* no input? */
+    return -1;
+  if (lua_tostring(L, -1)[0] == '=') {  /* line starts with `=' ? */
+    lua_pushfstring(L, "return %s", lua_tostring(L, -1)+1);/* `=' -> `return' */
+    lua_remove(L, -2);  /* remove original line */
+  }
+  for (;;) {  /* repeat until gets a complete line */
+    status = luaL_loadbuffer(L, lua_tostring(L, 1), lua_strlen(L, 1), "=stdin");
+    if (!incomplete(status)) break;  /* cannot try to add lines? */
+    if (lua_readline(L, get_prompt(0)) == 0)  /* no more input? */
+      return -1;
+    lua_concat(L, lua_gettop(L));  /* join lines */
+  }
+  lua_saveline(L, lua_tostring(L, 1));
+  lua_remove(L, 1);  /* remove line */
+  return status;
+}
+
+
+static void manual_input (void) {
+  int status;
+  const char *oldprogname = progname;
+  progname = NULL;
+  while ((status = load_string()) != -1) {
+    if (status == 0) status = lcall(0, 0);
+    report(status);
+    if (status == 0 && lua_gettop(L) > 0) {  /* any result to print? */
+      lua_getglobal(L, "print");
+      lua_insert(L, 1);
+      if (lua_pcall(L, lua_gettop(L)-1, 0, 0) != 0)
+        l_message(progname, lua_pushfstring(L, "error calling `print' (%s)",
+                                               lua_tostring(L, -1)));
+    }
+  }
+  lua_settop(L, 0);  /* clear stack */
+  fputs("\n", stdout);
+  progname = oldprogname;
+}
+
+
+static int handle_argv (char *argv[], int *interactive) {
+  if (argv[1] == NULL) {  /* no more arguments? */
+    if (stdin_is_tty()) {
+      print_version();
+      manual_input();
+    }
+    else
+      file_input(NULL);  /* executes stdin as a file */
+  }
+  else {  /* other arguments; loop over them */
+    int i;
+    for (i = 1; argv[i] != NULL; i++) {
+      if (argv[i][0] != '-') break;  /* not an option? */
+      switch (argv[i][1]) {  /* option */
+        case '-': {  /* `--' */
+          if (argv[i][2] != '\0') {
+            print_usage();
+            return 1;
+          }
+          i++;  /* skip this argument */
+          goto endloop;  /* stop handling arguments */
+        }
+        case '\0': {
+          file_input(NULL);  /* executes stdin as a file */
+          break;
+        }
+        case 'i': {
+          *interactive = 1;
+          break;
+        }
+        case 'v': {
+          print_version();
+          break;
+        }
+        case 'e': {
+          const char *chunk = argv[i] + 2;
+          if (*chunk == '\0') chunk = argv[++i];
+          if (chunk == NULL) {
+            print_usage();
+            return 1;
+          }
+          if (dostring(chunk, "=<command line>") != 0)
+            return 1;
+          break;
+        }
+        case 'l': {
+          const char *filename = argv[i] + 2;
+          if (*filename == '\0') filename = argv[++i];
+          if (filename == NULL) {
+            print_usage();
+            return 1;
+          }
+          if (load_file(filename))
+            return 1;  /* stop if file fails */
+          break;
+        }
+        case 'c': {
+          l_message(progname, "option `-c' is deprecated");
+          break;
+        }
+        case 's': {
+          l_message(progname, "option `-s' is deprecated");
+          break;
+        }
+        default: {
+          print_usage();
+          return 1;
+        }
+      }
+    } endloop:
+    if (argv[i] != NULL) {
+      const char *filename = argv[i];
+      getargs(argv, i);  /* collect arguments */
+      lua_setglobal(L, "arg");
+      return file_input(filename);  /* stop scanning arguments */
+    }
+  }
+  return 0;
+}
+
+
+static void openstdlibs (lua_State *l) {
+  const luaL_reg *lib = lualibs;
+  for (; lib->func; lib++) {
+    lib->func(l);  /* open library */
+    lua_settop(l, 0);  /* discard any results */
+  }
+}
+
+
+static int handle_luainit (void) {
+  const char *init = getenv("LUA_INIT");
+  if (init == NULL) return 0;  /* status OK */
+  else if (init[0] == '@')
+    return file_input(init+1);
+  else
+    return dostring(init, "=LUA_INIT");
+}
+
+
+struct Smain {
+  int argc;
+  char **argv;
+  int status;
+};
+
+
+static int pmain (lua_State *l) {
+  struct Smain *s = (struct Smain *)lua_touserdata(l, 1);
+  int status;
+  int interactive = 0;
+  if (s->argv[0] && s->argv[0][0]) progname = s->argv[0];
+  L = l;
+  lua_userinit(l);  /* open libraries */
+  status = handle_luainit();
+  if (status == 0) {
+    status = handle_argv(s->argv, &interactive);
+    if (status == 0 && interactive) manual_input();
+  }
+  s->status = status;
+  return 0;
+}
+
+
+int main (int argc, char *argv[]) {
+  int status;
+  struct Smain s;
+  lua_State *l = lua_open();  /* create state */
+  if (l == NULL) {
+    l_message(argv[0], "cannot create state: not enough memory");
+    return EXIT_FAILURE;
+  }
+  s.argc = argc;
+  s.argv = argv;
+  status = lua_cpcall(l, &pmain, &s);
+  report(status);
+  lua_close(l);
+  return (status || s.status) ? EXIT_FAILURE : EXIT_SUCCESS;
+}
+