diff options
author | Luigi Scarso <luigi.scarso@gmail.com> | 2019-01-06 18:57:01 +0000 |
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committer | Luigi Scarso <luigi.scarso@gmail.com> | 2019-01-06 18:57:01 +0000 |
commit | 0c14fd18747b9f6fbbecb75ba8beef6d449c460a (patch) | |
tree | 6c60915cf22ba35f9f4fff0048ebe3a6c073662d /Build/source/libs/lua52/lua52-src/src/lua.c | |
parent | 2a4260012f7ef1890dd351aabe4befd60922d5a6 (diff) |
luatex 1.09.2; r-mpost alias of mpost -restricted
git-svn-id: svn://tug.org/texlive/trunk@49614 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/libs/lua52/lua52-src/src/lua.c')
-rw-r--r-- | Build/source/libs/lua52/lua52-src/src/lua.c | 497 |
1 files changed, 0 insertions, 497 deletions
diff --git a/Build/source/libs/lua52/lua52-src/src/lua.c b/Build/source/libs/lua52/lua52-src/src/lua.c deleted file mode 100644 index 4345e554e92..00000000000 --- a/Build/source/libs/lua52/lua52-src/src/lua.c +++ /dev/null @@ -1,497 +0,0 @@ -/* -** $Id: lua.c,v 1.206.1.1 2013/04/12 18:48:47 roberto Exp $ -** 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" - - -#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) -#define LUA_INIT "LUA_INIT" -#endif - -#define LUA_INITVERSION \ - LUA_INIT "_" LUA_VERSION_MAJOR "_" LUA_VERSION_MINOR - - -/* -** lua_stdin_is_tty detects whether the standard input is a 'tty' (that -** is, whether we're running lua interactively). -*/ -#if defined(LUA_USE_ISATTY) -#include <unistd.h> -#define lua_stdin_is_tty() isatty(0) -#elif defined(LUA_WIN) -#include <io.h> -#include <stdio.h> -#define lua_stdin_is_tty() _isatty(_fileno(stdin)) -#else -#define lua_stdin_is_tty() 1 /* assume stdin is a tty */ -#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_USE_READLINE) - -#include <stdio.h> -#include <readline/readline.h> -#include <readline/history.h> -#define lua_readline(L,b,p) ((void)L, ((b)=readline(p)) != NULL) -#define lua_saveline(L,idx) \ - if (lua_rawlen(L,idx) > 0) /* non-empty line? */ \ - add_history(lua_tostring(L, idx)); /* add it to history */ -#define lua_freeline(L,b) ((void)L, free(b)) - -#elif !defined(lua_readline) - -#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,idx) { (void)L; (void)idx; } -#define lua_freeline(L,b) { (void)L; (void)b; } - -#endif - - - - -static lua_State *globalL = NULL; - -static const char *progname = LUA_PROGNAME; - - - -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(globalL, lstop, LUA_MASKCALL | LUA_MASKRET | LUA_MASKCOUNT, 1); -} - - -static void print_usage (const char *badoption) { - luai_writestringerror("%s: ", progname); - if (badoption[1] == 'e' || badoption[1] == 'l') - luai_writestringerror("'%s' needs argument\n", badoption); - else - luai_writestringerror("unrecognized option '%s'\n", badoption); - luai_writestringerror( - "usage: %s [options] [script [args]]\n" - "Available options are:\n" - " -e stat execute string " LUA_QL("stat") "\n" - " -i enter interactive mode after executing " LUA_QL("script") "\n" - " -l name require library " LUA_QL("name") "\n" - " -v show version information\n" - " -E ignore environment variables\n" - " -- stop handling options\n" - " - stop handling options and execute stdin\n" - , - progname); -} - - -static void l_message (const char *pname, const char *msg) { - if (pname) luai_writestringerror("%s: ", pname); - luai_writestringerror("%s\n", msg); -} - - -static int report (lua_State *L, int status) { - if (status != LUA_OK && !lua_isnil(L, -1)) { - const char *msg = lua_tostring(L, -1); - if (msg == NULL) msg = "(error object is not a string)"; - l_message(progname, msg); - lua_pop(L, 1); - /* force a complete garbage collection in case of errors */ - lua_gc(L, LUA_GCCOLLECT, 0); - } - return status; -} - - -/* the next function is called unprotected, so it must avoid errors */ -static void finalreport (lua_State *L, int status) { - if (status != LUA_OK) { - const char *msg = (lua_type(L, -1) == LUA_TSTRING) ? lua_tostring(L, -1) - : NULL; - if (msg == NULL) msg = "(error object is not a string)"; - l_message(progname, msg); - lua_pop(L, 1); - } -} - - -static int traceback (lua_State *L) { - const char *msg = lua_tostring(L, 1); - if (msg) - luaL_traceback(L, L, msg, 1); - else if (!lua_isnoneornil(L, 1)) { /* is there an error object? */ - if (!luaL_callmeta(L, 1, "__tostring")) /* try its 'tostring' metamethod */ - lua_pushliteral(L, "(no error message)"); - } - return 1; -} - - -static int docall (lua_State *L, int narg, int nres) { - int status; - int base = lua_gettop(L) - narg; /* function index */ - lua_pushcfunction(L, traceback); /* push traceback function */ - lua_insert(L, base); /* put it under chunk and args */ - globalL = L; /* to be available to 'laction' */ - signal(SIGINT, laction); - status = lua_pcall(L, narg, nres, base); - signal(SIGINT, SIG_DFL); - lua_remove(L, base); /* remove traceback function */ - return status; -} - - -static void print_version (void) { - luai_writestring(LUA_COPYRIGHT, strlen(LUA_COPYRIGHT)); - luai_writeline(); -} - - -static int getargs (lua_State *L, char **argv, int n) { - int narg; - int i; - int argc = 0; - while (argv[argc]) argc++; /* count total number of arguments */ - narg = argc - (n + 1); /* number of arguments to the script */ - luaL_checkstack(L, narg + 3, "too many arguments to script"); - for (i=n+1; i < argc; i++) - lua_pushstring(L, argv[i]); - lua_createtable(L, narg, n + 1); - for (i=0; i < argc; i++) { - lua_pushstring(L, argv[i]); - lua_rawseti(L, -2, i - n); - } - return narg; -} - - -static int dofile (lua_State *L, const char *name) { - int status = luaL_loadfile(L, name); - if (status == LUA_OK) status = docall(L, 0, 0); - return report(L, status); -} - - -static int dostring (lua_State *L, const char *s, const char *name) { - int status = luaL_loadbuffer(L, s, strlen(s), name); - if (status == LUA_OK) status = docall(L, 0, 0); - return report(L, status); -} - - -static int dolibrary (lua_State *L, const char *name) { - int status; - lua_getglobal(L, "require"); - lua_pushstring(L, name); - status = docall(L, 1, 1); /* call 'require(name)' */ - if (status == LUA_OK) - lua_setglobal(L, name); /* global[name] = require return */ - return report(L, status); -} - - -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; -} - -/* mark in error messages for incomplete statements */ -#define EOFMARK "<eof>" -#define marklen (sizeof(EOFMARK)/sizeof(char) - 1) - -static int incomplete (lua_State *L, int status) { - if (status == LUA_ERRSYNTAX) { - size_t lmsg; - const char *msg = lua_tolstring(L, -1, &lmsg); - if (lmsg >= marklen && strcmp(msg + lmsg - marklen, EOFMARK) == 0) { - lua_pop(L, 1); - return 1; - } - } - return 0; /* else... */ -} - - -static int pushline (lua_State *L, int firstline) { - char buffer[LUA_MAXINPUT]; - char *b = buffer; - size_t l; - const char *prmt = get_prompt(L, firstline); - int readstatus = lua_readline(L, b, prmt); - lua_pop(L, 1); /* remove result from 'get_prompt' */ - if (readstatus == 0) - return 0; /* no input */ - l = strlen(b); - if (l > 0 && b[l-1] == '\n') /* line ends with newline? */ - b[l-1] = '\0'; /* remove it */ - if (firstline && b[0] == '=') /* first line starts with `=' ? */ - lua_pushfstring(L, "return %s", b+1); /* change it to `return' */ - else - lua_pushstring(L, b); - lua_freeline(L, b); - return 1; -} - - -static int loadline (lua_State *L) { - int status; - lua_settop(L, 0); - if (!pushline(L, 1)) - return -1; /* no input */ - for (;;) { /* repeat until gets a complete line */ - size_t l; - const char *line = lua_tolstring(L, 1, &l); - status = luaL_loadbuffer(L, line, l, "=stdin"); - if (!incomplete(L, status)) break; /* cannot try to add lines? */ - if (!pushline(L, 0)) /* no more input? */ - return -1; - lua_pushliteral(L, "\n"); /* add a new line... */ - lua_insert(L, -2); /* ...between the two lines */ - lua_concat(L, 3); /* join them */ - } - lua_saveline(L, 1); - lua_remove(L, 1); /* remove line */ - return status; -} - - -static void dotty (lua_State *L) { - int status; - const char *oldprogname = progname; - progname = NULL; - while ((status = loadline(L)) != -1) { - if (status == LUA_OK) status = docall(L, 0, LUA_MULTRET); - report(L, status); - if (status == LUA_OK && lua_gettop(L) > 0) { /* any result to print? */ - luaL_checkstack(L, LUA_MINSTACK, "too many results to print"); - lua_getglobal(L, "print"); - lua_insert(L, 1); - if (lua_pcall(L, lua_gettop(L)-1, 0, 0) != LUA_OK) - l_message(progname, lua_pushfstring(L, - "error calling " LUA_QL("print") " (%s)", - lua_tostring(L, -1))); - } - } - lua_settop(L, 0); /* clear stack */ - luai_writeline(); - progname = oldprogname; -} - - -static int handle_script (lua_State *L, char **argv, int n) { - int status; - const char *fname; - int narg = getargs(L, argv, n); /* collect arguments */ - lua_setglobal(L, "arg"); - fname = argv[n]; - if (strcmp(fname, "-") == 0 && strcmp(argv[n-1], "--") != 0) - fname = NULL; /* stdin */ - status = luaL_loadfile(L, fname); - lua_insert(L, -(narg+1)); - if (status == LUA_OK) - status = docall(L, narg, LUA_MULTRET); - else - lua_pop(L, narg); - return report(L, status); -} - - -/* check that argument has no extra characters at the end */ -#define noextrachars(x) {if ((x)[2] != '\0') return -1;} - - -/* indices of various argument indicators in array args */ -#define has_i 0 /* -i */ -#define has_v 1 /* -v */ -#define has_e 2 /* -e */ -#define has_E 3 /* -E */ - -#define num_has 4 /* number of 'has_*' */ - - -static int collectargs (char **argv, int *args) { - int i; - for (i = 1; argv[i] != NULL; i++) { - if (argv[i][0] != '-') /* not an option? */ - return i; - switch (argv[i][1]) { /* option */ - case '-': - noextrachars(argv[i]); - return (argv[i+1] != NULL ? i+1 : 0); - case '\0': - return i; - case 'E': - args[has_E] = 1; - break; - case 'i': - noextrachars(argv[i]); - args[has_i] = 1; /* go through */ - case 'v': - noextrachars(argv[i]); - args[has_v] = 1; - break; - case 'e': - args[has_e] = 1; /* go through */ - 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 -(i - 1); /* no next argument or it is another option */ - } - break; - default: /* invalid option; return its index... */ - return -i; /* ...as a negative value */ - } - } - return 0; -} - - -static int runargs (lua_State *L, char **argv, int n) { - int i; - for (i = 1; i < n; i++) { - lua_assert(argv[i][0] == '-'); - switch (argv[i][1]) { /* option */ - case 'e': { - const char *chunk = argv[i] + 2; - if (*chunk == '\0') chunk = argv[++i]; - lua_assert(chunk != NULL); - if (dostring(L, chunk, "=(command line)") != LUA_OK) - return 0; - break; - } - case 'l': { - const char *filename = argv[i] + 2; - if (*filename == '\0') filename = argv[++i]; - lua_assert(filename != NULL); - if (dolibrary(L, filename) != LUA_OK) - return 0; /* stop if file fails */ - break; - } - default: break; - } - } - return 1; -} - - -static int handle_luainit (lua_State *L) { - const char *name = "=" LUA_INITVERSION; - const char *init = getenv(name + 1); - if (init == NULL) { - name = "=" LUA_INIT; - 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); -} - - -static int pmain (lua_State *L) { - int argc = (int)lua_tointeger(L, 1); - char **argv = (char **)lua_touserdata(L, 2); - int script; - int args[num_has]; - args[has_i] = args[has_v] = args[has_e] = args[has_E] = 0; - if (argv[0] && argv[0][0]) progname = argv[0]; - script = collectargs(argv, args); - if (script < 0) { /* invalid arg? */ - print_usage(argv[-script]); - return 0; - } - if (args[has_v]) print_version(); - if (args[has_E]) { /* option '-E'? */ - lua_pushboolean(L, 1); /* signal for libraries to ignore env. vars. */ - lua_setfield(L, LUA_REGISTRYINDEX, "LUA_NOENV"); - } - /* open standard libraries */ - luaL_checkversion(L); - lua_gc(L, LUA_GCSTOP, 0); /* stop collector during initialization */ - luaL_openlibs(L); /* open libraries */ - lua_gc(L, LUA_GCRESTART, 0); - if (!args[has_E] && handle_luainit(L) != LUA_OK) - return 0; /* error running LUA_INIT */ - /* execute arguments -e and -l */ - if (!runargs(L, argv, (script > 0) ? script : argc)) return 0; - /* execute main script (if there is one) */ - if (script && handle_script(L, argv, script) != LUA_OK) return 0; - if (args[has_i]) /* -i option? */ - dotty(L); - else if (script == 0 && !args[has_e] && !args[has_v]) { /* no arguments? */ - if (lua_stdin_is_tty()) { - print_version(); - dotty(L); - } - else dofile(L, NULL); /* executes stdin as a file */ - } - lua_pushboolean(L, 1); /* signal no errors */ - return 1; -} - - -int main (int argc, char **argv) { - int status, result; - lua_State *L = luaL_newstate(); /* create state */ - if (L == NULL) { - l_message(argv[0], "cannot create state: not enough memory"); - return EXIT_FAILURE; - } - /* call 'pmain' in protected mode */ - lua_pushcfunction(L, &pmain); - lua_pushinteger(L, argc); /* 1st argument */ - lua_pushlightuserdata(L, argv); /* 2nd argument */ - status = lua_pcall(L, 2, 1, 0); - result = lua_toboolean(L, -1); /* get result */ - finalreport(L, status); - lua_close(L); - return (result && status == LUA_OK) ? EXIT_SUCCESS : EXIT_FAILURE; -} - |