diff options
Diffstat (limited to 'crawl-ref/source/util/lua/src/lua.c')
| -rw-r--r-- | crawl-ref/source/util/lua/src/lua.c | 392 |
1 files changed, 0 insertions, 392 deletions
diff --git a/crawl-ref/source/util/lua/src/lua.c b/crawl-ref/source/util/lua/src/lua.c deleted file mode 100644 index 3a46609328..0000000000 --- a/crawl-ref/source/util/lua/src/lua.c +++ /dev/null @@ -1,392 +0,0 @@ -/* -** $Id: lua.c,v 1.160.1.2 2007/12/28 15:32:23 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" - - - -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 (void) { - fprintf(stderr, - "usage: %s [options] [script [args]].\n" - "Available options are:\n" - " -e stat execute string " LUA_QL("stat") "\n" - " -l name require library " LUA_QL("name") "\n" - " -i enter interactive mode after executing " LUA_QL("script") "\n" - " -v show version information\n" - " -- stop handling options\n" - " - execute stdin and stop handling options\n" - , - progname); - fflush(stderr); -} - - -static void l_message (const char *pname, const char *msg) { - if (pname) fprintf(stderr, "%s: ", pname); - fprintf(stderr, "%s\n", msg); - fflush(stderr); -} - - -static int report (lua_State *L, int status) { - if (status && !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); - } - return status; -} - - -static int traceback (lua_State *L) { - if (!lua_isstring(L, 1)) /* 'message' not a string? */ - return 1; /* keep it intact */ - lua_getfield(L, LUA_GLOBALSINDEX, "debug"); - if (!lua_istable(L, -1)) { - lua_pop(L, 1); - return 1; - } - lua_getfield(L, -1, "traceback"); - if (!lua_isfunction(L, -1)) { - lua_pop(L, 2); - return 1; - } - lua_pushvalue(L, 1); /* pass error message */ - lua_pushinteger(L, 2); /* skip this function and traceback */ - lua_call(L, 2, 1); /* call debug.traceback */ - return 1; -} - - -static int docall (lua_State *L, int narg, int clear) { - 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 */ - signal(SIGINT, laction); - status = lua_pcall(L, narg, (clear ? 0 : LUA_MULTRET), base); - signal(SIGINT, SIG_DFL); - lua_remove(L, base); /* remove traceback function */ - /* force a complete garbage collection in case of errors */ - if (status != 0) lua_gc(L, LUA_GCCOLLECT, 0); - return status; -} - - -static void print_version (void) { - l_message(NULL, LUA_RELEASE " " LUA_COPYRIGHT); -} - - -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) || docall(L, 0, 1); - 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) || docall(L, 0, 1); - return report(L, status); -} - - -static int dolibrary (lua_State *L, const char *name) { - lua_getglobal(L, "require"); - lua_pushstring(L, name); - return report(L, docall(L, 1, 1)); -} - - -static const char *get_prompt (lua_State *L, int firstline) { - const char *p; - lua_getfield(L, LUA_GLOBALSINDEX, firstline ? "_PROMPT" : "_PROMPT2"); - p = lua_tostring(L, -1); - if (p == NULL) p = (firstline ? LUA_PROMPT : LUA_PROMPT2); - lua_pop(L, 1); /* remove global */ - return p; -} - - -static int incomplete (lua_State *L, int status) { - if (status == LUA_ERRSYNTAX) { - size_t lmsg; - const char *msg = lua_tolstring(L, -1, &lmsg); - const char *tp = msg + lmsg - (sizeof(LUA_QL("<eof>")) - 1); - if (strstr(msg, LUA_QL("<eof>")) == tp) { - 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); - if (lua_readline(L, b, prmt) == 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 */ - status = luaL_loadbuffer(L, lua_tostring(L, 1), lua_strlen(L, 1), "=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 == 0) status = docall(L, 0, 0); - report(L, 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 " LUA_QL("print") " (%s)", - lua_tostring(L, -1))); - } - } - lua_settop(L, 0); /* clear stack */ - fputs("\n", stdout); - fflush(stdout); - 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 == 0) - status = docall(L, narg, 0); - else - lua_pop(L, narg); - return report(L, status); -} - - -/* check that argument has no extra characters at the end */ -#define notail(x) {if ((x)[2] != '\0') return -1;} - - -static int collectargs (char **argv, int *pi, int *pv, int *pe) { - int i; - for (i = 1; argv[i] != NULL; i++) { - if (argv[i][0] != '-') /* not an option? */ - return i; - switch (argv[i][1]) { /* option */ - case '-': - notail(argv[i]); - return (argv[i+1] != NULL ? i+1 : 0); - case '\0': - return i; - case 'i': - notail(argv[i]); - *pi = 1; /* go through */ - case 'v': - notail(argv[i]); - *pv = 1; - break; - case 'e': - *pe = 1; /* go through */ - case 'l': - if (argv[i][2] == '\0') { - i++; - if (argv[i] == NULL) return -1; - } - break; - default: return -1; /* invalid option */ - } - } - return 0; -} - - -static int runargs (lua_State *L, char **argv, int n) { - int i; - for (i = 1; i < n; i++) { - if (argv[i] == NULL) continue; - 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)") != 0) - return 1; - break; - } - case 'l': { - const char *filename = argv[i] + 2; - if (*filename == '\0') filename = argv[++i]; - lua_assert(filename != NULL); - if (dolibrary(L, filename)) - return 1; /* stop if file fails */ - break; - } - default: break; - } - } - return 0; -} - - -static int handle_luainit (lua_State *L) { - const char *init = getenv(LUA_INIT); - if (init == NULL) return 0; /* status OK */ - else if (init[0] == '@') - return dofile(L, init+1); - else - return dostring(L, 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); - char **argv = s->argv; - int script; - int has_i = 0, has_v = 0, has_e = 0; - globalL = L; - if (argv[0] && argv[0][0]) progname = argv[0]; - lua_gc(L, LUA_GCSTOP, 0); /* stop collector during initialization */ - luaL_openlibs(L); /* open libraries */ - lua_gc(L, LUA_GCRESTART, 0); - s->status = handle_luainit(L); - if (s->status != 0) return 0; - script = collectargs(argv, &has_i, &has_v, &has_e); - if (script < 0) { /* invalid args? */ - print_usage(); - s->status = 1; - return 0; - } - if (has_v) print_version(); - s->status = runargs(L, argv, (script > 0) ? script : s->argc); - if (s->status != 0) return 0; - if (script) - s->status = handle_script(L, argv, script); - if (s->status != 0) return 0; - if (has_i) - dotty(L); - else if (script == 0 && !has_e && !has_v) { - if (lua_stdin_is_tty()) { - print_version(); - dotty(L); - } - else dofile(L, NULL); /* executes stdin as a file */ - } - 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(L, status); - lua_close(L); - return (status || s.status) ? EXIT_FAILURE : EXIT_SUCCESS; -} - |