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Diffstat (limited to '3rdparty/lua/src/lua.c')
-rw-r--r--3rdparty/lua/src/lua.c486
1 files changed, 270 insertions, 216 deletions
diff --git a/3rdparty/lua/src/lua.c b/3rdparty/lua/src/lua.c
index 3f082da6be6..0f190044449 100644
--- a/3rdparty/lua/src/lua.c
+++ b/3rdparty/lua/src/lua.c
@@ -1,5 +1,5 @@
/*
-** $Id: lua.c,v 1.230 2017/01/12 17:14:26 roberto Exp $
+** $Id: lua.c $
** Lua stand-alone interpreter
** See Copyright Notice in lua.h
*/
@@ -9,31 +9,22 @@
#include "lprefix.h"
-#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <signal.h>
+
#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"
-
-#if !defined(LUA_PROMPT)
-#define LUA_PROMPT "> "
-#define LUA_PROMPT2 ">> "
-#endif
-
#if !defined(LUA_PROGNAME)
#define LUA_PROGNAME "lua"
#endif
-#if !defined(LUA_MAXINPUT)
-#define LUA_MAXINPUT 512
-#endif
-
#if !defined(LUA_INIT_VAR)
#define LUA_INIT_VAR "LUA_INIT"
#endif
@@ -41,68 +32,29 @@
#define LUA_INITVARVERSION LUA_INIT_VAR LUA_VERSUFFIX
-/*
-** lua_stdin_is_tty detects whether the standard input is a 'tty' (that
-** is, whether we're running lua interactively).
-*/
-#if !defined(lua_stdin_is_tty) /* { */
-
-#if defined(LUA_USE_POSIX) /* { */
-
-#include <unistd.h>
-#define lua_stdin_is_tty() isatty(0)
-
-#elif defined(LUA_USE_WINDOWS) /* }{ */
-
-#include <io.h>
-#include <windows.h>
-
-#define lua_stdin_is_tty() _isatty(_fileno(stdin))
-
-#else /* }{ */
-
-/* ISO C definition */
-#define lua_stdin_is_tty() 1 /* assume stdin is a tty */
+static lua_State *globalL = NULL;
-#endif /* } */
+static const char *progname = LUA_PROGNAME;
-#endif /* } */
+#if defined(LUA_USE_POSIX) /* { */
/*
-** lua_readline defines how to show a prompt and then read a line from
-** the standard input.
-** lua_saveline defines how to "save" a read line in a "history".
-** lua_freeline defines how to free a line read by lua_readline.
+** Use 'sigaction' when available.
*/
-#if !defined(lua_readline) /* { */
-
-#if defined(LUA_USE_READLINE) /* { */
-
-#include <readline/readline.h>
-#include <readline/history.h>
-#define lua_readline(L,b,p) ((void)L, ((b)=readline(p)) != NULL)
-#define lua_saveline(L,line) ((void)L, add_history(line))
-#define lua_freeline(L,b) ((void)L, free(b))
-
-#else /* }{ */
-
-#define lua_readline(L,b,p) \
- ((void)L, fputs(p, stdout), fflush(stdout), /* show prompt */ \
- fgets(b, LUA_MAXINPUT, stdin) != NULL) /* get line */
-#define lua_saveline(L,line) { (void)L; (void)line; }
-#define lua_freeline(L,b) { (void)L; (void)b; }
-
-#endif /* } */
-
-#endif /* } */
-
-
+static void setsignal (int sig, void (*handler)(int)) {
+ struct sigaction sa;
+ sa.sa_handler = handler;
+ sa.sa_flags = 0;
+ sigemptyset(&sa.sa_mask); /* do not mask any signal */
+ sigaction(sig, &sa, NULL);
+}
+#else /* }{ */
-static lua_State *globalL = NULL;
+#define setsignal signal
-static const char *progname = LUA_PROGNAME;
+#endif /* } */
/*
@@ -122,8 +74,9 @@ static void lstop (lua_State *L, lua_Debug *ar) {
** interpreter.
*/
static void laction (int i) {
- signal(i, SIG_DFL); /* if another SIGINT happens, terminate process */
- lua_sethook(globalL, lstop, LUA_MASKCALL | LUA_MASKRET | LUA_MASKCOUNT, 1);
+ int flag = LUA_MASKCALL | LUA_MASKRET | LUA_MASKLINE | LUA_MASKCOUNT;
+ setsignal(i, SIG_DFL); /* if another SIGINT happens, terminate process */
+ lua_sethook(globalL, lstop, flag, 1);
}
@@ -136,13 +89,15 @@ static void print_usage (const char *badoption) {
lua_writestringerror(
"usage: %s [options] [script [args]]\n"
"Available options are:\n"
- " -e stat execute string 'stat'\n"
- " -i enter interactive mode after executing 'script'\n"
- " -l name require library 'name'\n"
- " -v show version information\n"
- " -E ignore environment variables\n"
- " -- stop handling options\n"
- " - stop handling options and execute stdin\n"
+ " -e stat execute string 'stat'\n"
+ " -i enter interactive mode after executing 'script'\n"
+ " -l mod require library 'mod' into global 'mod'\n"
+ " -l g=mod require library 'mod' into global 'g'\n"
+ " -v show version information\n"
+ " -E ignore environment variables\n"
+ " -W turn warnings on\n"
+ " -- stop handling options\n"
+ " - stop handling options and execute stdin\n"
,
progname);
}
@@ -201,9 +156,9 @@ static int docall (lua_State *L, int narg, int nres) {
lua_pushcfunction(L, msghandler); /* push message handler */
lua_insert(L, base); /* put it under function and args */
globalL = L; /* to be available to 'laction' */
- signal(SIGINT, laction); /* set C-signal handler */
+ setsignal(SIGINT, laction); /* set C-signal handler */
status = lua_pcall(L, narg, nres, base);
- signal(SIGINT, SIG_DFL); /* reset C-signal handler */
+ setsignal(SIGINT, SIG_DFL); /* reset C-signal handler */
lua_remove(L, base); /* remove message handler from the stack */
return status;
}
@@ -253,29 +208,253 @@ static int dostring (lua_State *L, const char *s, const char *name) {
/*
-** Calls 'require(name)' and stores the result in a global variable
-** with the given name.
+** Receives 'globname[=modname]' and runs 'globname = require(modname)'.
*/
-static int dolibrary (lua_State *L, const char *name) {
+static int dolibrary (lua_State *L, char *globname) {
int status;
+ char *modname = strchr(globname, '=');
+ if (modname == NULL) /* no explicit name? */
+ modname = globname; /* module name is equal to global name */
+ else {
+ *modname = '\0'; /* global name ends here */
+ modname++; /* module name starts after the '=' */
+ }
lua_getglobal(L, "require");
- lua_pushstring(L, name);
- status = docall(L, 1, 1); /* call 'require(name)' */
+ lua_pushstring(L, modname);
+ status = docall(L, 1, 1); /* call 'require(modname)' */
if (status == LUA_OK)
- lua_setglobal(L, name); /* global[name] = require return */
+ lua_setglobal(L, globname); /* globname = require(modname) */
return report(L, status);
}
/*
-** Returns the string to be used as a prompt by the interpreter.
+** Push on the stack the contents of table 'arg' from 1 to #arg
+*/
+static int pushargs (lua_State *L) {
+ int i, n;
+ if (lua_getglobal(L, "arg") != LUA_TTABLE)
+ luaL_error(L, "'arg' is not a table");
+ n = (int)luaL_len(L, -1);
+ luaL_checkstack(L, n + 3, "too many arguments to script");
+ for (i = 1; i <= n; i++)
+ lua_rawgeti(L, -i, i);
+ lua_remove(L, -i); /* remove table from the stack */
+ return n;
+}
+
+
+static int handle_script (lua_State *L, char **argv) {
+ int status;
+ const char *fname = argv[0];
+ if (strcmp(fname, "-") == 0 && strcmp(argv[-1], "--") != 0)
+ fname = NULL; /* stdin */
+ status = luaL_loadfile(L, fname);
+ if (status == LUA_OK) {
+ int n = pushargs(L); /* push arguments to script */
+ status = docall(L, n, LUA_MULTRET);
+ }
+ return report(L, status);
+}
+
+
+/* bits of various argument indicators in 'args' */
+#define has_error 1 /* bad option */
+#define has_i 2 /* -i */
+#define has_v 4 /* -v */
+#define has_e 8 /* -e */
+#define has_E 16 /* -E */
+
+
+/*
+** Traverses all arguments from 'argv', returning a mask with those
+** needed before running any Lua code (or an error code if it finds
+** any invalid argument). 'first' returns the first not-handled argument
+** (either the script name or a bad argument in case of error).
+*/
+static int collectargs (char **argv, int *first) {
+ int args = 0;
+ int i;
+ for (i = 1; argv[i] != NULL; i++) {
+ *first = i;
+ if (argv[i][0] != '-') /* not an option? */
+ return args; /* stop handling options */
+ switch (argv[i][1]) { /* else check option */
+ case '-': /* '--' */
+ if (argv[i][2] != '\0') /* extra characters after '--'? */
+ return has_error; /* invalid option */
+ *first = i + 1;
+ return args;
+ case '\0': /* '-' */
+ return args; /* script "name" is '-' */
+ case 'E':
+ if (argv[i][2] != '\0') /* extra characters? */
+ return has_error; /* invalid option */
+ args |= has_E;
+ break;
+ case 'W':
+ if (argv[i][2] != '\0') /* extra characters? */
+ return has_error; /* invalid option */
+ break;
+ case 'i':
+ args |= has_i; /* (-i implies -v) *//* FALLTHROUGH */
+ case 'v':
+ if (argv[i][2] != '\0') /* extra characters? */
+ return has_error; /* invalid option */
+ args |= has_v;
+ break;
+ case 'e':
+ args |= has_e; /* FALLTHROUGH */
+ case 'l': /* both options need an argument */
+ if (argv[i][2] == '\0') { /* no concatenated argument? */
+ i++; /* try next 'argv' */
+ if (argv[i] == NULL || argv[i][0] == '-')
+ return has_error; /* no next argument or it is another option */
+ }
+ break;
+ default: /* invalid option */
+ return has_error;
+ }
+ }
+ *first = i; /* no script name */
+ return args;
+}
+
+
+/*
+** Processes options 'e' and 'l', which involve running Lua code, and
+** 'W', which also affects the state.
+** Returns 0 if some code raises an error.
+*/
+static int runargs (lua_State *L, char **argv, int n) {
+ int i;
+ for (i = 1; i < n; i++) {
+ int option = argv[i][1];
+ lua_assert(argv[i][0] == '-'); /* already checked */
+ switch (option) {
+ case 'e': case 'l': {
+ int status;
+ char *extra = argv[i] + 2; /* both options need an argument */
+ if (*extra == '\0') extra = argv[++i];
+ lua_assert(extra != NULL);
+ status = (option == 'e')
+ ? dostring(L, extra, "=(command line)")
+ : dolibrary(L, extra);
+ if (status != LUA_OK) return 0;
+ break;
+ }
+ case 'W':
+ lua_warning(L, "@on", 0); /* warnings on */
+ break;
+ }
+ }
+ return 1;
+}
+
+
+static int handle_luainit (lua_State *L) {
+ const char *name = "=" LUA_INITVARVERSION;
+ const char *init = getenv(name + 1);
+ if (init == NULL) {
+ name = "=" LUA_INIT_VAR;
+ init = getenv(name + 1); /* try alternative name */
+ }
+ if (init == NULL) return LUA_OK;
+ else if (init[0] == '@')
+ return dofile(L, init+1);
+ else
+ return dostring(L, init, name);
+}
+
+
+/*
+** {==================================================================
+** Read-Eval-Print Loop (REPL)
+** ===================================================================
+*/
+
+#if !defined(LUA_PROMPT)
+#define LUA_PROMPT "> "
+#define LUA_PROMPT2 ">> "
+#endif
+
+#if !defined(LUA_MAXINPUT)
+#define LUA_MAXINPUT 512
+#endif
+
+
+/*
+** lua_stdin_is_tty detects whether the standard input is a 'tty' (that
+** is, whether we're running lua interactively).
+*/
+#if !defined(lua_stdin_is_tty) /* { */
+
+#if defined(LUA_USE_POSIX) /* { */
+
+#include <unistd.h>
+#define lua_stdin_is_tty() isatty(0)
+
+#elif defined(LUA_USE_WINDOWS) /* }{ */
+
+#include <io.h>
+#include <windows.h>
+
+#define lua_stdin_is_tty() _isatty(_fileno(stdin))
+
+#else /* }{ */
+
+/* ISO C definition */
+#define lua_stdin_is_tty() 1 /* assume stdin is a tty */
+
+#endif /* } */
+
+#endif /* } */
+
+
+/*
+** lua_readline defines how to show a prompt and then read a line from
+** the standard input.
+** lua_saveline defines how to "save" a read line in a "history".
+** lua_freeline defines how to free a line read by lua_readline.
+*/
+#if !defined(lua_readline) /* { */
+
+#if defined(LUA_USE_READLINE) /* { */
+
+#include <readline/readline.h>
+#include <readline/history.h>
+#define lua_initreadline(L) ((void)L, rl_readline_name="lua")
+#define lua_readline(L,b,p) ((void)L, ((b)=readline(p)) != NULL)
+#define lua_saveline(L,line) ((void)L, add_history(line))
+#define lua_freeline(L,b) ((void)L, free(b))
+
+#else /* }{ */
+
+#define lua_initreadline(L) ((void)L)
+#define lua_readline(L,b,p) \
+ ((void)L, fputs(p, stdout), fflush(stdout), /* show prompt */ \
+ fgets(b, LUA_MAXINPUT, stdin) != NULL) /* get line */
+#define lua_saveline(L,line) { (void)L; (void)line; }
+#define lua_freeline(L,b) { (void)L; (void)b; }
+
+#endif /* } */
+
+#endif /* } */
+
+
+/*
+** Return the string to be used as a prompt by the interpreter. Leave
+** the string (or nil, if using the default value) on the stack, to keep
+** it anchored.
*/
static const char *get_prompt (lua_State *L, int firstline) {
- const char *p;
- lua_getglobal(L, firstline ? "_PROMPT" : "_PROMPT2");
- p = lua_tostring(L, -1);
- if (p == NULL) p = (firstline ? LUA_PROMPT : LUA_PROMPT2);
- return p;
+ if (lua_getglobal(L, firstline ? "_PROMPT" : "_PROMPT2") == LUA_TNIL)
+ return (firstline ? LUA_PROMPT : LUA_PROMPT2); /* use the default */
+ else { /* apply 'tostring' over the value */
+ const char *p = luaL_tolstring(L, -1, NULL);
+ lua_remove(L, -2); /* remove original value */
+ return p;
+ }
}
/* mark in error messages for incomplete statements */
@@ -406,6 +585,7 @@ static void doREPL (lua_State *L) {
int status;
const char *oldprogname = progname;
progname = NULL; /* no 'progname' on errors in interactive mode */
+ lua_initreadline(L);
while ((status = loadline(L)) != -1) {
if (status == LUA_OK)
status = docall(L, 0, LUA_MULTRET);
@@ -417,134 +597,7 @@ static void doREPL (lua_State *L) {
progname = oldprogname;
}
-
-/*
-** Push on the stack the contents of table 'arg' from 1 to #arg
-*/
-static int pushargs (lua_State *L) {
- int i, n;
- if (lua_getglobal(L, "arg") != LUA_TTABLE)
- luaL_error(L, "'arg' is not a table");
- n = (int)luaL_len(L, -1);
- luaL_checkstack(L, n + 3, "too many arguments to script");
- for (i = 1; i <= n; i++)
- lua_rawgeti(L, -i, i);
- lua_remove(L, -i); /* remove table from the stack */
- return n;
-}
-
-
-static int handle_script (lua_State *L, char **argv) {
- int status;
- const char *fname = argv[0];
- if (strcmp(fname, "-") == 0 && strcmp(argv[-1], "--") != 0)
- fname = NULL; /* stdin */
- status = luaL_loadfile(L, fname);
- if (status == LUA_OK) {
- int n = pushargs(L); /* push arguments to script */
- status = docall(L, n, LUA_MULTRET);
- }
- return report(L, status);
-}
-
-
-
-/* bits of various argument indicators in 'args' */
-#define has_error 1 /* bad option */
-#define has_i 2 /* -i */
-#define has_v 4 /* -v */
-#define has_e 8 /* -e */
-#define has_E 16 /* -E */
-
-/*
-** Traverses all arguments from 'argv', returning a mask with those
-** needed before running any Lua code (or an error code if it finds
-** any invalid argument). 'first' returns the first not-handled argument
-** (either the script name or a bad argument in case of error).
-*/
-static int collectargs (char **argv, int *first) {
- int args = 0;
- int i;
- for (i = 1; argv[i] != NULL; i++) {
- *first = i;
- if (argv[i][0] != '-') /* not an option? */
- return args; /* stop handling options */
- switch (argv[i][1]) { /* else check option */
- case '-': /* '--' */
- if (argv[i][2] != '\0') /* extra characters after '--'? */
- return has_error; /* invalid option */
- *first = i + 1;
- return args;
- case '\0': /* '-' */
- return args; /* script "name" is '-' */
- case 'E':
- if (argv[i][2] != '\0') /* extra characters after 1st? */
- return has_error; /* invalid option */
- args |= has_E;
- break;
- case 'i':
- args |= has_i; /* (-i implies -v) *//* FALLTHROUGH */
- case 'v':
- if (argv[i][2] != '\0') /* extra characters after 1st? */
- return has_error; /* invalid option */
- args |= has_v;
- break;
- case 'e':
- args |= has_e; /* FALLTHROUGH */
- case 'l': /* both options need an argument */
- if (argv[i][2] == '\0') { /* no concatenated argument? */
- i++; /* try next 'argv' */
- if (argv[i] == NULL || argv[i][0] == '-')
- return has_error; /* no next argument or it is another option */
- }
- break;
- default: /* invalid option */
- return has_error;
- }
- }
- *first = i; /* no script name */
- return args;
-}
-
-
-/*
-** Processes options 'e' and 'l', which involve running Lua code.
-** Returns 0 if some code raises an error.
-*/
-static int runargs (lua_State *L, char **argv, int n) {
- int i;
- for (i = 1; i < n; i++) {
- int option = argv[i][1];
- lua_assert(argv[i][0] == '-'); /* already checked */
- if (option == 'e' || option == 'l') {
- int status;
- const char *extra = argv[i] + 2; /* both options need an argument */
- if (*extra == '\0') extra = argv[++i];
- lua_assert(extra != NULL);
- status = (option == 'e')
- ? dostring(L, extra, "=(command line)")
- : dolibrary(L, extra);
- if (status != LUA_OK) return 0;
- }
- }
- return 1;
-}
-
-
-
-static int handle_luainit (lua_State *L) {
- const char *name = "=" LUA_INITVARVERSION;
- const char *init = getenv(name + 1);
- if (init == NULL) {
- name = "=" LUA_INIT_VAR;
- init = getenv(name + 1); /* try alternative name */
- }
- if (init == NULL) return LUA_OK;
- else if (init[0] == '@')
- return dofile(L, init+1);
- else
- return dostring(L, init, name);
-}
+/* }================================================================== */
/*
@@ -570,6 +623,7 @@ static int pmain (lua_State *L) {
}
luaL_openlibs(L); /* open standard libraries */
createargtable(L, argv, argc, script); /* create table 'arg' */
+ lua_gc(L, LUA_GCGEN, 0, 0); /* GC in generational mode */
if (!(args & has_E)) { /* no option '-E'? */
if (handle_luainit(L) != LUA_OK) /* run LUA_INIT */
return 0; /* error running LUA_INIT */