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-rw-r--r--lib/lua/src/llex.c884
1 files changed, 442 insertions, 442 deletions
diff --git a/lib/lua/src/llex.c b/lib/lua/src/llex.c
index 6382cce..ff88f92 100644
--- a/lib/lua/src/llex.c
+++ b/lib/lua/src/llex.c
@@ -1,442 +1,442 @@
-/*
-** $Id: llex.c,v 1.4 2004-11-27 21:35:20 pixel Exp $
-** Lexical Analyzer
-** See Copyright Notice in lua.h
-*/
-
-
-#include <ctype.h>
-#include <string.h>
-
-#define llex_c
-
-#include "lua.h"
-
-#include "ldo.h"
-#include "llex.h"
-#include "lobject.h"
-#include "lparser.h"
-#include "lstate.h"
-#include "lstring.h"
-#include "lzio.h"
-
-
-
-#define next(LS) (LS->current = zgetc(LS->z))
-
-
-
-/* ORDER RESERVED */
-static const char *const token2string [] = {
- "and", "break", "do", "else", "elseif",
- "end", "false", "for", "function", "if",
- "in", "local", "nil", "not", "or", "repeat",
- "return", "then", "true", "until", "while", "*name",
- "..", "...", "==", ">=", "<=", "~=",
- "*number", "*string", "<eof>"
-};
-
-
-void luaX_init (lua_State *L) {
- int i;
- for (i=0; i<NUM_RESERVED; i++) {
- TString *ts = luaS_new(L, token2string[i]);
- luaS_fix(ts); /* reserved words are never collected */
- lua_assert(strlen(token2string[i])+1 <= TOKEN_LEN);
- ts->tsv.reserved = cast(lu_byte, i+1); /* reserved word */
- }
-}
-
-
-#define MAXSRC 80
-
-
-void luaX_checklimit (LexState *ls, int val, int limit, const char *msg) {
- if (val > limit) {
- msg = luaO_pushfstring(ls->L, "too many %s (limit=%d)", msg, limit);
- luaX_syntaxerror(ls, msg);
- }
-}
-
-
-void luaX_errorline (LexState *ls, const char *s, const char *token, int line) {
- lua_State *L = ls->L;
- char buff[MAXSRC];
- luaO_chunkid(buff, getstr(ls->source), MAXSRC);
- luaO_pushfstring(L, "%s:%d: %s near `%s'", buff, line, s, token);
- luaD_throw(L, LUA_ERRSYNTAX);
-}
-
-
-static void luaX_error (LexState *ls, const char *s, const char *token) {
- luaX_errorline(ls, s, token, ls->linenumber);
-}
-
-
-void luaX_syntaxerror (LexState *ls, const char *msg) {
- const char *lasttoken;
- switch (ls->t.token) {
- case TK_NAME:
- lasttoken = getstr(ls->t.seminfo.ts);
- break;
- case TK_STRING:
- case TK_NUMBER:
- lasttoken = luaZ_buffer(ls->buff);
- break;
- default:
- lasttoken = luaX_token2str(ls, ls->t.token);
- break;
- }
- luaX_error(ls, msg, lasttoken);
-}
-
-
-const char *luaX_token2str (LexState *ls, int token) {
- if (token < FIRST_RESERVED) {
- lua_assert(token == (unsigned char)token);
- return luaO_pushfstring(ls->L, "%c", token);
- }
- else
- return token2string[token-FIRST_RESERVED];
-}
-
-
-static void luaX_lexerror (LexState *ls, const char *s, int token) {
- if (token == TK_EOS)
- luaX_error(ls, s, luaX_token2str(ls, token));
- else
- luaX_error(ls, s, luaZ_buffer(ls->buff));
-}
-
-
-static void inclinenumber (LexState *LS) {
- next(LS); /* skip `\n' */
- ++LS->linenumber;
- luaX_checklimit(LS, LS->linenumber, MAX_INT, "lines in a chunk");
-}
-
-
-void luaX_setinput (lua_State *L, LexState *LS, ZIO *z, TString *source) {
- LS->L = L;
- LS->lookahead.token = TK_EOS; /* no look-ahead token */
- LS->z = z;
- LS->fs = NULL;
- LS->linenumber = 1;
- LS->lastline = 1;
- LS->source = source;
- next(LS); /* read first char */
- if (LS->current == '#') {
- do { /* skip first line */
- next(LS);
- } while (LS->current != '\n' && LS->current != EOZ);
- }
-}
-
-
-
-/*
-** =======================================================
-** LEXICAL ANALYZER
-** =======================================================
-*/
-
-
-/* use buffer to store names, literal strings and numbers */
-
-/* extra space to allocate when growing buffer */
-#define EXTRABUFF 32
-
-/* maximum number of chars that can be read without checking buffer size */
-#define MAXNOCHECK 5
-
-#define checkbuffer(LS, len) \
- if (((len)+MAXNOCHECK)*sizeof(char) > luaZ_sizebuffer((LS)->buff)) \
- luaZ_openspace((LS)->L, (LS)->buff, (len)+EXTRABUFF)
-
-#define save(LS, c, l) \
- (luaZ_buffer((LS)->buff)[l++] = cast(char, c))
-#define save_and_next(LS, l) (save(LS, LS->current, l), next(LS))
-
-
-static size_t readname (LexState *LS) {
- size_t l = 0;
- checkbuffer(LS, l);
- do {
- checkbuffer(LS, l);
- save_and_next(LS, l);
- } while (isalnum(LS->current) || LS->current == '_');
- save(LS, '\0', l);
- return l-1;
-}
-
-
-/* LUA_NUMBER */
-static void read_numeral (LexState *LS, int comma, SemInfo *seminfo) {
- int oct = 0, hex = 0;
- size_t l = 0;
- checkbuffer(LS, l);
- if (comma) save(LS, '.', l);
- else if (LS->current == '0') {
- oct = 1;
- checkbuffer(LS, 1);
- save_and_next(LS, l);
- if (LS->current == 'x') {
- oct = 0;
- hex = 1;
- checkbuffer(LS, 1);
- save_and_next(LS, l);
- }
- }
- while (isdigit(LS->current) || (hex && isxdigit(LS->current))) {
- checkbuffer(LS, l);
- save_and_next(LS, l);
- }
- checkbuffer(LS, 1);
- if (LS->current == '.') {
- save_and_next(LS, l);
- if (hex || oct) {
- save(LS, '\0', l);
- luaX_lexerror(LS,
- "error in number, mixing decimal point with octal or hexadecimal",
- TK_NUMBER);
- }
- if (LS->current == '.') {
- save_and_next(LS, l);
- save(LS, '\0', l);
- luaX_lexerror(LS,
- "ambiguous syntax (decimal point x string concatenation)",
- TK_NUMBER);
- }
- }
- while (isdigit(LS->current)) {
- checkbuffer(LS, l);
- save_and_next(LS, l);
- }
- if (LS->current == 'e' || LS->current == 'E') {
- save_and_next(LS, l); /* read `E' */
- if (hex || oct) {
- save(LS, '\0', l);
- luaX_lexerror(LS,
- "error in number, mixing exponential with octal or hexadecimal",
- TK_NUMBER);
- }
- if (LS->current == '+' || LS->current == '-')
- save_and_next(LS, l); /* optional exponent sign */
- while (isdigit(LS->current)) {
- checkbuffer(LS, l);
- save_and_next(LS, l);
- }
- }
- save(LS, '\0', l);
- if (!luaO_str2d(luaZ_buffer(LS->buff), &seminfo->r))
- luaX_lexerror(LS, "malformed number", TK_NUMBER);
-}
-
-
-static void read_long_string (LexState *LS, SemInfo *seminfo) {
- int cont = 0;
- size_t l = 0;
- checkbuffer(LS, l);
- save(LS, '[', l); /* save first `[' */
- save_and_next(LS, l); /* pass the second `[' */
- if (LS->current == '\n') /* string starts with a newline? */
- inclinenumber(LS); /* skip it */
- for (;;) {
- checkbuffer(LS, l);
- switch (LS->current) {
- case EOZ:
- save(LS, '\0', l);
- luaX_lexerror(LS, (seminfo) ? "unfinished long string" :
- "unfinished long comment", TK_EOS);
- break; /* to avoid warnings */
- case '[':
- save_and_next(LS, l);
- if (LS->current == '[') {
- cont++;
- save_and_next(LS, l);
- }
- continue;
- case ']':
- save_and_next(LS, l);
- if (LS->current == ']') {
- if (cont == 0) goto endloop;
- cont--;
- save_and_next(LS, l);
- }
- continue;
- case '\n':
- save(LS, '\n', l);
- inclinenumber(LS);
- if (!seminfo) l = 0; /* reset buffer to avoid wasting space */
- continue;
- default:
- save_and_next(LS, l);
- }
- } endloop:
- save_and_next(LS, l); /* skip the second `]' */
- save(LS, '\0', l);
- if (seminfo)
- seminfo->ts = luaS_newlstr(LS->L, luaZ_buffer(LS->buff) + 2, l - 5);
-}
-
-
-static void read_string (LexState *LS, int del, SemInfo *seminfo) {
- size_t l = 0;
- checkbuffer(LS, l);
- save_and_next(LS, l);
- while (LS->current != del) {
- checkbuffer(LS, l);
- switch (LS->current) {
- case EOZ:
- save(LS, '\0', l);
- luaX_lexerror(LS, "unfinished string", TK_EOS);
- break; /* to avoid warnings */
- case '\n':
- save(LS, '\0', l);
- luaX_lexerror(LS, "unfinished string", TK_STRING);
- break; /* to avoid warnings */
- case '\\':
- next(LS); /* do not save the `\' */
- switch (LS->current) {
- case 'a': save(LS, '\a', l); next(LS); break;
- case 'b': save(LS, '\b', l); next(LS); break;
- case 'f': save(LS, '\f', l); next(LS); break;
- case 'n': save(LS, '\n', l); next(LS); break;
- case 'r': save(LS, '\r', l); next(LS); break;
- case 't': save(LS, '\t', l); next(LS); break;
- case 'v': save(LS, '\v', l); next(LS); break;
- case '\n': save(LS, '\n', l); inclinenumber(LS); break;
- case EOZ: break; /* will raise an error next loop */
- default: {
- if (!isdigit(LS->current))
- save_and_next(LS, l); /* handles \\, \", \', and \? */
- else { /* \xxx */
- int c = 0;
- int i = 0;
- do {
- c = 10*c + (LS->current-'0');
- next(LS);
- } while (++i<3 && isdigit(LS->current));
- if (c > UCHAR_MAX) {
- save(LS, '\0', l);
- luaX_lexerror(LS, "escape sequence too large", TK_STRING);
- }
- save(LS, c, l);
- }
- }
- }
- break;
- default:
- save_and_next(LS, l);
- }
- }
- save_and_next(LS, l); /* skip delimiter */
- save(LS, '\0', l);
- seminfo->ts = luaS_newlstr(LS->L, luaZ_buffer(LS->buff) + 1, l - 3);
-}
-
-
-int luaX_lex (LexState *LS, SemInfo *seminfo) {
- for (;;) {
- switch (LS->current) {
-
- case '\n': {
- inclinenumber(LS);
- continue;
- }
- case '-': {
- next(LS);
- if (LS->current != '-') return '-';
- /* else is a comment */
- next(LS);
- if (LS->current == '[' && (next(LS), LS->current == '['))
- read_long_string(LS, NULL); /* long comment */
- else /* short comment */
- while (LS->current != '\n' && LS->current != EOZ)
- next(LS);
- continue;
- }
- case '[': {
- next(LS);
- if (LS->current != '[') return '[';
- else {
- read_long_string(LS, seminfo);
- return TK_STRING;
- }
- }
- case '=': {
- next(LS);
- if (LS->current != '=') return '=';
- else { next(LS); return TK_EQ; }
- }
- case '<': {
- next(LS);
- if (LS->current != '=') return '<';
- else { next(LS); return TK_LE; }
- }
- case '>': {
- next(LS);
- if (LS->current != '=') return '>';
- else { next(LS); return TK_GE; }
- }
- case '~': {
- next(LS);
- if (LS->current != '=') return '~';
- else { next(LS); return TK_NE; }
- }
- case '"':
- case '\'': {
- read_string(LS, LS->current, seminfo);
- return TK_STRING;
- }
- case '.': {
- next(LS);
- if (LS->current == '.') {
- next(LS);
- if (LS->current == '.') {
- next(LS);
- return TK_DOTS; /* ... */
- }
- else return TK_CONCAT; /* .. */
- }
- else if (!isdigit(LS->current)) return '.';
- else {
- read_numeral(LS, 1, seminfo);
- return TK_NUMBER;
- }
- }
- case EOZ: {
- return TK_EOS;
- }
- default: {
- if (isspace(LS->current)) {
- next(LS);
- continue;
- }
- else if (isdigit(LS->current)) {
- read_numeral(LS, 0, seminfo);
- return TK_NUMBER;
- }
- else if (isalpha(LS->current) || LS->current == '_') {
- /* identifier or reserved word */
- size_t l = readname(LS);
- TString *ts = luaS_newlstr(LS->L, luaZ_buffer(LS->buff), l);
- if (ts->tsv.reserved > 0) /* reserved word? */
- return ts->tsv.reserved - 1 + FIRST_RESERVED;
- seminfo->ts = ts;
- return TK_NAME;
- }
- else {
- int c = LS->current;
- if (iscntrl(c))
- luaX_error(LS, "invalid control char",
- luaO_pushfstring(LS->L, "char(%d)", c));
- next(LS);
- return c; /* single-char tokens (+ - / ...) */
- }
- }
- }
- }
-}
-
-#undef next
+/*
+** $Id: llex.c,v 1.5 2004-11-27 21:46:07 pixel Exp $
+** Lexical Analyzer
+** See Copyright Notice in lua.h
+*/
+
+
+#include <ctype.h>
+#include <string.h>
+
+#define llex_c
+
+#include "lua.h"
+
+#include "ldo.h"
+#include "llex.h"
+#include "lobject.h"
+#include "lparser.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "lzio.h"
+
+
+
+#define next(LS) (LS->current = zgetc(LS->z))
+
+
+
+/* ORDER RESERVED */
+static const char *const token2string [] = {
+ "and", "break", "do", "else", "elseif",
+ "end", "false", "for", "function", "if",
+ "in", "local", "nil", "not", "or", "repeat",
+ "return", "then", "true", "until", "while", "*name",
+ "..", "...", "==", ">=", "<=", "~=",
+ "*number", "*string", "<eof>"
+};
+
+
+void luaX_init (lua_State *L) {
+ int i;
+ for (i=0; i<NUM_RESERVED; i++) {
+ TString *ts = luaS_new(L, token2string[i]);
+ luaS_fix(ts); /* reserved words are never collected */
+ lua_assert(strlen(token2string[i])+1 <= TOKEN_LEN);
+ ts->tsv.reserved = cast(lu_byte, i+1); /* reserved word */
+ }
+}
+
+
+#define MAXSRC 80
+
+
+void luaX_checklimit (LexState *ls, int val, int limit, const char *msg) {
+ if (val > limit) {
+ msg = luaO_pushfstring(ls->L, "too many %s (limit=%d)", msg, limit);
+ luaX_syntaxerror(ls, msg);
+ }
+}
+
+
+void luaX_errorline (LexState *ls, const char *s, const char *token, int line) {
+ lua_State *L = ls->L;
+ char buff[MAXSRC];
+ luaO_chunkid(buff, getstr(ls->source), MAXSRC);
+ luaO_pushfstring(L, "%s:%d: %s near `%s'", buff, line, s, token);
+ luaD_throw(L, LUA_ERRSYNTAX);
+}
+
+
+static void luaX_error (LexState *ls, const char *s, const char *token) {
+ luaX_errorline(ls, s, token, ls->linenumber);
+}
+
+
+void luaX_syntaxerror (LexState *ls, const char *msg) {
+ const char *lasttoken;
+ switch (ls->t.token) {
+ case TK_NAME:
+ lasttoken = getstr(ls->t.seminfo.ts);
+ break;
+ case TK_STRING:
+ case TK_NUMBER:
+ lasttoken = luaZ_buffer(ls->buff);
+ break;
+ default:
+ lasttoken = luaX_token2str(ls, ls->t.token);
+ break;
+ }
+ luaX_error(ls, msg, lasttoken);
+}
+
+
+const char *luaX_token2str (LexState *ls, int token) {
+ if (token < FIRST_RESERVED) {
+ lua_assert(token == (unsigned char)token);
+ return luaO_pushfstring(ls->L, "%c", token);
+ }
+ else
+ return token2string[token-FIRST_RESERVED];
+}
+
+
+static void luaX_lexerror (LexState *ls, const char *s, int token) {
+ if (token == TK_EOS)
+ luaX_error(ls, s, luaX_token2str(ls, token));
+ else
+ luaX_error(ls, s, luaZ_buffer(ls->buff));
+}
+
+
+static void inclinenumber (LexState *LS) {
+ next(LS); /* skip `\n' */
+ ++LS->linenumber;
+ luaX_checklimit(LS, LS->linenumber, MAX_INT, "lines in a chunk");
+}
+
+
+void luaX_setinput (lua_State *L, LexState *LS, ZIO *z, TString *source) {
+ LS->L = L;
+ LS->lookahead.token = TK_EOS; /* no look-ahead token */
+ LS->z = z;
+ LS->fs = NULL;
+ LS->linenumber = 1;
+ LS->lastline = 1;
+ LS->source = source;
+ next(LS); /* read first char */
+ if (LS->current == '#') {
+ do { /* skip first line */
+ next(LS);
+ } while (LS->current != '\n' && LS->current != EOZ);
+ }
+}
+
+
+
+/*
+** =======================================================
+** LEXICAL ANALYZER
+** =======================================================
+*/
+
+
+/* use buffer to store names, literal strings and numbers */
+
+/* extra space to allocate when growing buffer */
+#define EXTRABUFF 32
+
+/* maximum number of chars that can be read without checking buffer size */
+#define MAXNOCHECK 5
+
+#define checkbuffer(LS, len) \
+ if (((len)+MAXNOCHECK)*sizeof(char) > luaZ_sizebuffer((LS)->buff)) \
+ luaZ_openspace((LS)->L, (LS)->buff, (len)+EXTRABUFF)
+
+#define save(LS, c, l) \
+ (luaZ_buffer((LS)->buff)[l++] = cast(char, c))
+#define save_and_next(LS, l) (save(LS, LS->current, l), next(LS))
+
+
+static size_t readname (LexState *LS) {
+ size_t l = 0;
+ checkbuffer(LS, l);
+ do {
+ checkbuffer(LS, l);
+ save_and_next(LS, l);
+ } while (isalnum(LS->current) || LS->current == '_');
+ save(LS, '\0', l);
+ return l-1;
+}
+
+
+/* LUA_NUMBER */
+static void read_numeral (LexState *LS, int comma, SemInfo *seminfo) {
+ int oct = 0, hex = 0;
+ size_t l = 0;
+ checkbuffer(LS, l);
+ if (comma) save(LS, '.', l);
+ else if (LS->current == '0') {
+ oct = 1;
+ checkbuffer(LS, 1);
+ save_and_next(LS, l);
+ if (LS->current == 'x') {
+ oct = 0;
+ hex = 1;
+ checkbuffer(LS, 1);
+ save_and_next(LS, l);
+ }
+ }
+ while (isdigit(LS->current) || (hex && isxdigit(LS->current))) {
+ checkbuffer(LS, l);
+ save_and_next(LS, l);
+ }
+ checkbuffer(LS, 1);
+ if (LS->current == '.') {
+ save_and_next(LS, l);
+ if (hex || oct) {
+ save(LS, '\0', l);
+ luaX_lexerror(LS,
+ "error in number, mixing decimal point with octal or hexadecimal",
+ TK_NUMBER);
+ }
+ if (LS->current == '.') {
+ save_and_next(LS, l);
+ save(LS, '\0', l);
+ luaX_lexerror(LS,
+ "ambiguous syntax (decimal point x string concatenation)",
+ TK_NUMBER);
+ }
+ }
+ while (isdigit(LS->current)) {
+ checkbuffer(LS, l);
+ save_and_next(LS, l);
+ }
+ if (LS->current == 'e' || LS->current == 'E') {
+ save_and_next(LS, l); /* read `E' */
+ if (hex || oct) {
+ save(LS, '\0', l);
+ luaX_lexerror(LS,
+ "error in number, mixing exponential with octal or hexadecimal",
+ TK_NUMBER);
+ }
+ if (LS->current == '+' || LS->current == '-')
+ save_and_next(LS, l); /* optional exponent sign */
+ while (isdigit(LS->current)) {
+ checkbuffer(LS, l);
+ save_and_next(LS, l);
+ }
+ }
+ save(LS, '\0', l);
+ if (!luaO_str2d(luaZ_buffer(LS->buff), &seminfo->r))
+ luaX_lexerror(LS, "malformed number", TK_NUMBER);
+}
+
+
+static void read_long_string (LexState *LS, SemInfo *seminfo) {
+ int cont = 0;
+ size_t l = 0;
+ checkbuffer(LS, l);
+ save(LS, '[', l); /* save first `[' */
+ save_and_next(LS, l); /* pass the second `[' */
+ if (LS->current == '\n') /* string starts with a newline? */
+ inclinenumber(LS); /* skip it */
+ for (;;) {
+ checkbuffer(LS, l);
+ switch (LS->current) {
+ case EOZ:
+ save(LS, '\0', l);
+ luaX_lexerror(LS, (seminfo) ? "unfinished long string" :
+ "unfinished long comment", TK_EOS);
+ break; /* to avoid warnings */
+ case '[':
+ save_and_next(LS, l);
+ if (LS->current == '[') {
+ cont++;
+ save_and_next(LS, l);
+ }
+ continue;
+ case ']':
+ save_and_next(LS, l);
+ if (LS->current == ']') {
+ if (cont == 0) goto endloop;
+ cont--;
+ save_and_next(LS, l);
+ }
+ continue;
+ case '\n':
+ save(LS, '\n', l);
+ inclinenumber(LS);
+ if (!seminfo) l = 0; /* reset buffer to avoid wasting space */
+ continue;
+ default:
+ save_and_next(LS, l);
+ }
+ } endloop:
+ save_and_next(LS, l); /* skip the second `]' */
+ save(LS, '\0', l);
+ if (seminfo)
+ seminfo->ts = luaS_newlstr(LS->L, luaZ_buffer(LS->buff) + 2, l - 5);
+}
+
+
+static void read_string (LexState *LS, int del, SemInfo *seminfo) {
+ size_t l = 0;
+ checkbuffer(LS, l);
+ save_and_next(LS, l);
+ while (LS->current != del) {
+ checkbuffer(LS, l);
+ switch (LS->current) {
+ case EOZ:
+ save(LS, '\0', l);
+ luaX_lexerror(LS, "unfinished string", TK_EOS);
+ break; /* to avoid warnings */
+ case '\n':
+ save(LS, '\0', l);
+ luaX_lexerror(LS, "unfinished string", TK_STRING);
+ break; /* to avoid warnings */
+ case '\\':
+ next(LS); /* do not save the `\' */
+ switch (LS->current) {
+ case 'a': save(LS, '\a', l); next(LS); break;
+ case 'b': save(LS, '\b', l); next(LS); break;
+ case 'f': save(LS, '\f', l); next(LS); break;
+ case 'n': save(LS, '\n', l); next(LS); break;
+ case 'r': save(LS, '\r', l); next(LS); break;
+ case 't': save(LS, '\t', l); next(LS); break;
+ case 'v': save(LS, '\v', l); next(LS); break;
+ case '\n': save(LS, '\n', l); inclinenumber(LS); break;
+ case EOZ: break; /* will raise an error next loop */
+ default: {
+ if (!isdigit(LS->current))
+ save_and_next(LS, l); /* handles \\, \", \', and \? */
+ else { /* \xxx */
+ int c = 0;
+ int i = 0;
+ do {
+ c = 10*c + (LS->current-'0');
+ next(LS);
+ } while (++i<3 && isdigit(LS->current));
+ if (c > UCHAR_MAX) {
+ save(LS, '\0', l);
+ luaX_lexerror(LS, "escape sequence too large", TK_STRING);
+ }
+ save(LS, c, l);
+ }
+ }
+ }
+ break;
+ default:
+ save_and_next(LS, l);
+ }
+ }
+ save_and_next(LS, l); /* skip delimiter */
+ save(LS, '\0', l);
+ seminfo->ts = luaS_newlstr(LS->L, luaZ_buffer(LS->buff) + 1, l - 3);
+}
+
+
+int luaX_lex (LexState *LS, SemInfo *seminfo) {
+ for (;;) {
+ switch (LS->current) {
+
+ case '\n': {
+ inclinenumber(LS);
+ continue;
+ }
+ case '-': {
+ next(LS);
+ if (LS->current != '-') return '-';
+ /* else is a comment */
+ next(LS);
+ if (LS->current == '[' && (next(LS), LS->current == '['))
+ read_long_string(LS, NULL); /* long comment */
+ else /* short comment */
+ while (LS->current != '\n' && LS->current != EOZ)
+ next(LS);
+ continue;
+ }
+ case '[': {
+ next(LS);
+ if (LS->current != '[') return '[';
+ else {
+ read_long_string(LS, seminfo);
+ return TK_STRING;
+ }
+ }
+ case '=': {
+ next(LS);
+ if (LS->current != '=') return '=';
+ else { next(LS); return TK_EQ; }
+ }
+ case '<': {
+ next(LS);
+ if (LS->current != '=') return '<';
+ else { next(LS); return TK_LE; }
+ }
+ case '>': {
+ next(LS);
+ if (LS->current != '=') return '>';
+ else { next(LS); return TK_GE; }
+ }
+ case '~': {
+ next(LS);
+ if (LS->current != '=') return '~';
+ else { next(LS); return TK_NE; }
+ }
+ case '"':
+ case '\'': {
+ read_string(LS, LS->current, seminfo);
+ return TK_STRING;
+ }
+ case '.': {
+ next(LS);
+ if (LS->current == '.') {
+ next(LS);
+ if (LS->current == '.') {
+ next(LS);
+ return TK_DOTS; /* ... */
+ }
+ else return TK_CONCAT; /* .. */
+ }
+ else if (!isdigit(LS->current)) return '.';
+ else {
+ read_numeral(LS, 1, seminfo);
+ return TK_NUMBER;
+ }
+ }
+ case EOZ: {
+ return TK_EOS;
+ }
+ default: {
+ if (isspace(LS->current)) {
+ next(LS);
+ continue;
+ }
+ else if (isdigit(LS->current)) {
+ read_numeral(LS, 0, seminfo);
+ return TK_NUMBER;
+ }
+ else if (isalpha(LS->current) || LS->current == '_') {
+ /* identifier or reserved word */
+ size_t l = readname(LS);
+ TString *ts = luaS_newlstr(LS->L, luaZ_buffer(LS->buff), l);
+ if (ts->tsv.reserved > 0) /* reserved word? */
+ return ts->tsv.reserved - 1 + FIRST_RESERVED;
+ seminfo->ts = ts;
+ return TK_NAME;
+ }
+ else {
+ int c = LS->current;
+ if (iscntrl(c))
+ luaX_error(LS, "invalid control char",
+ luaO_pushfstring(LS->L, "char(%d)", c));
+ next(LS);
+ return c; /* single-char tokens (+ - / ...) */
+ }
+ }
+ }
+ }
+}
+
+#undef next
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 20:35:05 +0000