11 void lexerror(lex_file *lex, const char *fmt, ...)
17 con_vprintmsg(LVL_ERROR, lex->name, lex->sline, "parse error", fmt, ap);
19 con_vprintmsg(LVL_ERROR, "", 0, "parse error", fmt, ap);
23 bool lexwarn(lex_file *lex, int warntype, const char *fmt, ...)
26 int lvl = LVL_WARNING;
28 if (!OPTS_WARN(warntype))
35 con_vprintmsg(lvl, lex->name, lex->sline, "warning", fmt, ap);
45 token *tok = (token*)mem_a(sizeof(token));
48 memset(tok, 0, sizeof(*tok));
52 void token_delete(token *self)
54 if (self->next && self->next->prev == self)
55 self->next->prev = self->prev;
56 if (self->prev && self->prev->next == self)
57 self->prev->next = self->next;
58 MEM_VECTOR_CLEAR(self, value);
62 token* token_copy(const token *cp)
64 token* self = token_new();
68 self->value_alloc = cp->value_count + 1;
69 self->value_count = cp->value_count;
70 self->value = (char*)mem_a(self->value_alloc);
75 memcpy(self->value, cp->value, cp->value_count);
76 self->value[self->value_alloc-1] = 0;
80 self->ttype = cp->ttype;
81 memcpy(&self->constval, &cp->constval, sizeof(self->constval));
85 void token_delete_all(token *t)
96 token* token_copy_all(const token *cp)
101 out = cur = token_copy(cp);
107 cur->next = token_copy(cp);
109 token_delete_all(out);
112 cur->next->prev = cur;
119 static void lex_token_new(lex_file *lex)
123 token_delete(lex->tok);
124 lex->tok = token_new();
127 vec_shrinkto(lex->tok.value, 0);
128 lex->tok.constval.t = 0;
129 lex->tok.ctx.line = lex->sline;
130 lex->tok.ctx.file = lex->name;
135 lex_file* lex_open(const char *file)
138 FILE *in = util_fopen(file, "rb");
141 lexerror(NULL, "open failed: '%s'\n", file);
145 lex = (lex_file*)mem_a(sizeof(*lex));
148 lexerror(NULL, "out of memory\n");
152 memset(lex, 0, sizeof(*lex));
155 lex->name = util_strdup(file);
156 lex->line = 1; /* we start counting at 1 */
161 vec_push(lex_filenames, lex->name);
165 lex_file* lex_open_string(const char *str, size_t len, const char *name)
169 lex = (lex_file*)mem_a(sizeof(*lex));
171 lexerror(NULL, "out of memory\n");
175 memset(lex, 0, sizeof(*lex));
178 lex->open_string = str;
179 lex->open_string_length = len;
180 lex->open_string_pos = 0;
182 lex->name = util_strdup(name ? name : "<string-source>");
183 lex->line = 1; /* we start counting at 1 */
188 vec_push(lex_filenames, lex->name);
193 void lex_cleanup(void)
196 for (i = 0; i < vec_size(lex_filenames); ++i)
197 mem_d(lex_filenames[i]);
198 vec_free(lex_filenames);
201 void lex_close(lex_file *lex)
204 for (i = 0; i < vec_size(lex->frames); ++i)
205 mem_d(lex->frames[i].name);
206 vec_free(lex->frames);
209 vec_free(lex->modelname);
215 token_delete(lex->tok);
217 vec_free(lex->tok.value);
219 /* mem_d(lex->name); collected in lex_filenames */
223 static int lex_fgetc(lex_file *lex)
226 return fgetc(lex->file);
227 if (lex->open_string) {
228 if (lex->open_string_pos >= lex->open_string_length)
230 return lex->open_string[lex->open_string_pos++];
235 /* Get or put-back data
236 * The following to functions do NOT understand what kind of data they
238 * The are merely wrapping get/put in order to count line numbers.
240 static void lex_ungetch(lex_file *lex, int ch);
241 static int lex_try_trigraph(lex_file *lex, int old)
246 lex_ungetch(lex, c2);
252 case '=': return '#';
253 case '/': return '\\';
254 case '\'': return '^';
255 case '(': return '[';
256 case ')': return ']';
257 case '!': return '|';
258 case '<': return '{';
259 case '>': return '}';
260 case '-': return '~';
262 lex_ungetch(lex, c3);
263 lex_ungetch(lex, c2);
268 static int lex_try_digraph(lex_file *lex, int ch)
272 if (ch == '<' && c2 == ':')
274 else if (ch == ':' && c2 == '>')
276 else if (ch == '<' && c2 == '%')
278 else if (ch == '%' && c2 == '>')
280 else if (ch == '%' && c2 == ':')
282 lex_ungetch(lex, c2);
286 static int lex_getch(lex_file *lex)
292 if (!lex->push_line && lex->peek[lex->peekpos] == '\n')
294 return lex->peek[lex->peekpos];
298 if (!lex->push_line && ch == '\n')
301 return lex_try_trigraph(lex, ch);
302 else if (!lex->flags.nodigraphs && (ch == '<' || ch == ':' || ch == '%'))
303 return lex_try_digraph(lex, ch);
307 static void lex_ungetch(lex_file *lex, int ch)
309 lex->peek[lex->peekpos++] = ch;
310 if (!lex->push_line && ch == '\n')
314 /* classify characters
315 * some additions to the is*() functions of ctype.h
318 /* Idents are alphanumberic, but they start with alpha or _ */
319 static bool isident_start(int ch)
321 return isalpha(ch) || ch == '_';
324 static bool isident(int ch)
326 return isident_start(ch) || isdigit(ch);
329 /* isxdigit_only is used when we already know it's not a digit
330 * and want to see if it's a hex digit anyway.
332 static bool isxdigit_only(int ch)
334 return (ch >= 'a' && ch <= 'f') || (ch >= 'A' && ch <= 'F');
337 /* Append a character to the token buffer */
338 static void lex_tokench(lex_file *lex, int ch)
340 vec_push(lex->tok.value, ch);
343 /* Append a trailing null-byte */
344 static void lex_endtoken(lex_file *lex)
346 vec_push(lex->tok.value, 0);
347 vec_shrinkby(lex->tok.value, 1);
350 static bool lex_try_pragma(lex_file *lex)
354 char *command = NULL;
357 if (lex->flags.preprocessing)
362 lex_ungetch(lex, ch);
366 for (ch = lex_getch(lex); vec_size(pragma) < 8 && ch >= 'a' && ch <= 'z'; ch = lex_getch(lex))
367 vec_push(pragma, ch);
370 if (ch != ' ' || strcmp(pragma, "pragma")) {
371 lex_ungetch(lex, ch);
375 for (ch = lex_getch(lex); vec_size(command) < 32 && ch >= 'a' && ch <= 'z'; ch = lex_getch(lex))
376 vec_push(command, ch);
377 vec_push(command, 0);
380 lex_ungetch(lex, ch);
384 for (ch = lex_getch(lex); vec_size(param) < 32 && ch != ')' && ch != '\n'; ch = lex_getch(lex))
389 lex_ungetch(lex, ch);
393 if (!strcmp(command, "push")) {
394 if (!strcmp(param, "line")) {
401 else if (!strcmp(command, "pop")) {
402 if (!strcmp(param, "line")) {
420 while (vec_size(command)) {
421 lex_ungetch(lex, vec_last(command));
428 while (vec_size(command)) {
429 lex_ungetch(lex, vec_last(command));
436 while (vec_size(pragma)) {
437 lex_ungetch(lex, vec_last(pragma));
442 lex_ungetch(lex, '#');
446 /* Skip whitespace and comments and return the first
447 * non-white character.
448 * As this makes use of the above getch() ungetch() functions,
449 * we don't need to care at all about line numbering anymore.
451 * In theory, this function should only be used at the beginning
452 * of lexing, or when we *know* the next character is part of the token.
453 * Otherwise, if the parser throws an error, the linenumber may not be
454 * the line of the error, but the line of the next token AFTER the error.
456 * This is currently only problematic when using c-like string-continuation,
457 * since comments and whitespaces are allowed between 2 such strings.
461 "A continuation of the previous string"
462 // This line is skipped
465 * In this case, if the parse decides it didn't actually want a string,
466 * and uses lex->line to print an error, it will show the ', foo);' line's
469 * On the other hand, the parser is supposed to remember the line of the next
470 * token's beginning. In this case we would want skipwhite() to be called
471 * AFTER reading a token, so that the parser, before reading the NEXT token,
472 * doesn't store teh *comment's* linenumber, but the actual token's linenumber.
475 * here is to store the line of the first character after skipping
476 * the initial whitespace in lex->sline, this happens in lex_do.
478 static int lex_skipwhite(lex_file *lex)
481 bool haswhite = false;
486 while (ch != EOF && isspace(ch)) {
488 if (lex_try_pragma(lex)) {
493 if (lex->flags.preprocessing) {
496 /* see if there was whitespace first */
497 if (haswhite) { /* (vec_size(lex->tok.value)) { */
498 lex_ungetch(lex, ch);
502 /* otherwise return EOL */
506 lex_tokench(lex, ch);
515 /* one line comment */
518 if (lex->flags.preprocessing) {
521 lex_tokench(lex, '/');
522 lex_tokench(lex, '/');
524 lex_tokench(lex, ' ');
525 lex_tokench(lex, ' ');
528 while (ch != EOF && ch != '\n') {
529 if (lex->flags.preprocessing)
530 lex_tokench(lex, ' '); /* ch); */
533 if (lex->flags.preprocessing) {
534 lex_ungetch(lex, '\n');
542 /* multiline comment */
543 if (lex->flags.preprocessing) {
546 lex_tokench(lex, '/');
547 lex_tokench(lex, '*');
549 lex_tokench(lex, ' ');
550 lex_tokench(lex, ' ');
559 if (lex->flags.preprocessing) {
561 lex_tokench(lex, '*');
562 lex_tokench(lex, '/');
564 lex_tokench(lex, ' ');
565 lex_tokench(lex, ' ');
570 if (lex->flags.preprocessing) {
571 lex_tokench(lex, ' '); /* ch); */
574 ch = ' '; /* cause TRUE in the isspace check */
577 /* Otherwise roll back to the slash and break out of the loop */
578 lex_ungetch(lex, ch);
582 } while (ch != EOF && isspace(ch));
586 lex_ungetch(lex, ch);
593 static bool GMQCC_WARN lex_finish_ident(lex_file *lex)
598 while (ch != EOF && isident(ch))
600 lex_tokench(lex, ch);
604 /* last ch was not an ident ch: */
605 lex_ungetch(lex, ch);
610 /* read one ident for the frame list */
611 static int lex_parse_frame(lex_file *lex)
618 while (ch != EOF && ch != '\n' && isspace(ch))
624 if (!isident_start(ch)) {
625 lexerror(lex, "invalid framename, must start with one of a-z or _, got %c", ch);
629 lex_tokench(lex, ch);
630 if (!lex_finish_ident(lex))
636 /* read a list of $frames */
637 static bool lex_finish_frames(lex_file *lex)
644 rc = lex_parse_frame(lex);
645 if (rc > 0) /* end of line */
647 if (rc < 0) /* error */
650 for (i = 0; i < vec_size(lex->frames); ++i) {
651 if (!strcmp(lex->tok.value, lex->frames[i].name)) {
652 lex->frames[i].value = lex->framevalue++;
653 if (lexwarn(lex, WARN_FRAME_MACROS, "duplicate frame macro defined: `%s`", lex->tok.value))
658 if (i < vec_size(lex->frames))
661 m.value = lex->framevalue++;
662 m.name = util_strdup(lex->tok.value);
663 vec_shrinkto(lex->tok.value, 0);
664 vec_push(lex->frames, m);
668 static int GMQCC_WARN lex_finish_string(lex_file *lex, int quote)
676 return TOKEN_STRINGCONST;
678 if (lex->flags.preprocessing && ch == '\\') {
679 lex_tokench(lex, ch);
682 lexerror(lex, "unexpected end of file");
683 lex_ungetch(lex, EOF); /* next token to be TOKEN_EOF */
684 return (lex->tok.ttype = TOKEN_ERROR);
686 lex_tokench(lex, ch);
688 else if (ch == '\\') {
691 lexerror(lex, "unexpected end of file");
692 lex_ungetch(lex, EOF); /* next token to be TOKEN_EOF */
693 return (lex->tok.ttype = TOKEN_ERROR);
700 case 'a': ch = '\a'; break;
701 case 'b': ch = '\b'; break;
702 case 'r': ch = '\r'; break;
703 case 'n': ch = '\n'; break;
704 case 't': ch = '\t'; break;
705 case 'f': ch = '\f'; break;
706 case 'v': ch = '\v'; break;
708 lexwarn(lex, WARN_UNKNOWN_CONTROL_SEQUENCE, "unrecognized control sequence: \\%c", ch);
709 /* so we just add the character plus backslash no matter what it actually is */
710 lex_tokench(lex, '\\');
712 /* add the character finally */
713 lex_tokench(lex, ch);
716 lex_tokench(lex, ch);
718 lexerror(lex, "unexpected end of file within string constant");
719 lex_ungetch(lex, EOF); /* next token to be TOKEN_EOF */
720 return (lex->tok.ttype = TOKEN_ERROR);
723 static int GMQCC_WARN lex_finish_digit(lex_file *lex, int lastch)
729 /* parse a number... */
730 lex->tok.ttype = TOKEN_INTCONST;
732 lex_tokench(lex, ch);
735 if (ch != '.' && !isdigit(ch))
737 if (lastch != '0' || ch != 'x')
739 /* end of the number or EOF */
740 lex_ungetch(lex, ch);
743 lex->tok.constval.i = lastch - '0';
744 return lex->tok.ttype;
750 /* EOF would have been caught above */
754 lex_tokench(lex, ch);
756 while (isdigit(ch) || (ishex && isxdigit_only(ch)))
758 lex_tokench(lex, ch);
762 /* NOT else, '.' can come from above as well */
763 if (ch == '.' && !ishex)
765 /* Allow floating comma in non-hex mode */
766 lex->tok.ttype = TOKEN_FLOATCONST;
767 lex_tokench(lex, ch);
769 /* continue digits-only */
773 lex_tokench(lex, ch);
777 /* put back the last character */
778 /* but do not put back the trailing 'f' or a float */
779 if (lex->tok.ttype == TOKEN_FLOATCONST && ch == 'f')
782 /* generally we don't want words to follow numbers: */
784 lexerror(lex, "unexpected trailing characters after number");
785 return (lex->tok.ttype = TOKEN_ERROR);
787 lex_ungetch(lex, ch);
790 if (lex->tok.ttype == TOKEN_FLOATCONST)
791 lex->tok.constval.f = strtod(lex->tok.value, NULL);
793 lex->tok.constval.i = strtol(lex->tok.value, NULL, 0);
794 return lex->tok.ttype;
797 int lex_do(lex_file *lex)
808 ch = lex_skipwhite(lex);
809 if (!lex->flags.mergelines || ch != '\\')
813 lex_ungetch(lex, ch);
817 /* we reached a linemerge */
818 lex_tokench(lex, '\n');
822 lex->sline = lex->line;
823 lex->tok.ctx.line = lex->sline;
824 lex->tok.ctx.file = lex->name;
826 if (lex->flags.preprocessing && (ch == TOKEN_WHITE || ch == TOKEN_EOL || ch == TOKEN_FATAL)) {
827 return (lex->tok.ttype = ch);
831 return (lex->tok.ttype = TOKEN_FATAL);
835 return (lex->tok.ttype = TOKEN_EOF);
838 /* modelgen / spiritgen commands */
844 if (!isident_start(ch)) {
845 lexerror(lex, "hanging '$' modelgen/spritegen command line");
848 lex_tokench(lex, ch);
849 if (!lex_finish_ident(lex))
850 return (lex->tok.ttype = TOKEN_ERROR);
852 /* skip the known commands */
855 if (!strcmp(v, "frame") || !strcmp(v, "framesave"))
857 /* frame/framesave command works like an enum
858 * similar to fteqcc we handle this in the lexer.
859 * The reason for this is that it is sensitive to newlines,
860 * which the parser is unaware of
862 if (!lex_finish_frames(lex))
863 return (lex->tok.ttype = TOKEN_ERROR);
867 if (!strcmp(v, "framevalue"))
870 while (ch != EOF && isspace(ch) && ch != '\n')
874 lexerror(lex, "$framevalue requires an integer parameter");
879 lex->tok.ttype = lex_finish_digit(lex, ch);
881 if (lex->tok.ttype != TOKEN_INTCONST) {
882 lexerror(lex, "$framevalue requires an integer parameter");
885 lex->framevalue = lex->tok.constval.i;
889 if (!strcmp(v, "framerestore"))
895 rc = lex_parse_frame(lex);
898 lexerror(lex, "$framerestore requires a framename parameter");
902 return (lex->tok.ttype = TOKEN_FATAL);
905 for (frame = 0; frame < vec_size(lex->frames); ++frame) {
906 if (!strcmp(v, lex->frames[frame].name)) {
907 lex->framevalue = lex->frames[frame].value;
911 lexerror(lex, "unknown framename `%s`", v);
915 if (!strcmp(v, "modelname"))
921 rc = lex_parse_frame(lex);
924 lexerror(lex, "$modelname requires a parameter");
928 return (lex->tok.ttype = TOKEN_FATAL);
931 if (lex->modelname) {
933 m.value = lex->framevalue;
934 m.name = lex->modelname;
935 lex->modelname = NULL;
936 vec_push(lex->frames, m);
938 lex->modelname = lex->tok.value;
939 lex->tok.value = NULL;
943 if (!strcmp(v, "flush"))
946 for (frame = 0; frame < vec_size(lex->frames); ++frame)
947 mem_d(lex->frames[frame].name);
948 vec_free(lex->frames);
949 /* skip line (fteqcc does it too) */
951 while (ch != EOF && ch != '\n')
956 if (!strcmp(v, "cd") ||
957 !strcmp(v, "origin") ||
958 !strcmp(v, "base") ||
959 !strcmp(v, "flags") ||
960 !strcmp(v, "scale") ||
965 while (ch != EOF && ch != '\n')
970 for (frame = 0; frame < vec_size(lex->frames); ++frame) {
971 if (!strcmp(v, lex->frames[frame].name)) {
972 lex->tok.constval.i = lex->frames[frame].value;
973 return (lex->tok.ttype = TOKEN_INTCONST);
977 lexerror(lex, "invalid frame macro");
981 /* single-character tokens */
986 lex_tokench(lex, ch);
988 if (lex->flags.noops)
989 return (lex->tok.ttype = ch);
991 return (lex->tok.ttype = TOKEN_OPERATOR);
1000 lex_tokench(lex, ch);
1002 return (lex->tok.ttype = ch);
1007 if (lex->flags.noops)
1009 /* Detect characters early which are normally
1010 * operators OR PART of an operator.
1027 lex_tokench(lex, ch);
1029 return (lex->tok.ttype = ch);
1036 lex_tokench(lex, ch);
1037 /* peak ahead once */
1038 nextch = lex_getch(lex);
1039 if (nextch != '.') {
1040 lex_ungetch(lex, nextch);
1042 return (lex->tok.ttype = ch);
1044 /* peak ahead again */
1045 nextch = lex_getch(lex);
1046 if (nextch != '.') {
1047 lex_ungetch(lex, nextch);
1048 lex_ungetch(lex, nextch);
1050 return (lex->tok.ttype = ch);
1052 /* fill the token to be "..." */
1053 lex_tokench(lex, ch);
1054 lex_tokench(lex, ch);
1056 return (lex->tok.ttype = TOKEN_DOTS);
1060 if (ch == ',' || ch == '.') {
1061 lex_tokench(lex, ch);
1063 return (lex->tok.ttype = TOKEN_OPERATOR);
1066 if (ch == '+' || ch == '-' || /* ++, --, +=, -= and -> as well! */
1067 ch == '>' || ch == '<' || /* <<, >>, <=, >= */
1068 ch == '=' || ch == '!' || /* ==, != */
1069 ch == '&' || ch == '|') /* &&, ||, &=, |= */
1071 lex_tokench(lex, ch);
1073 nextch = lex_getch(lex);
1074 if (nextch == ch || nextch == '=') {
1075 lex_tokench(lex, nextch);
1076 } else if (ch == '-' && nextch == '>') {
1077 lex_tokench(lex, nextch);
1079 lex_ungetch(lex, nextch);
1082 return (lex->tok.ttype = TOKEN_OPERATOR);
1086 if (ch == '^' || ch == '~' || ch == '!')
1088 lex_tokench(lex, ch);
1090 return (lex->tok.ttype = TOKEN_OPERATOR);
1094 if (ch == '*' || ch == '/') /* *=, /= */
1096 lex_tokench(lex, ch);
1098 nextch = lex_getch(lex);
1099 if (nextch == '=') {
1100 lex_tokench(lex, nextch);
1102 lex_ungetch(lex, nextch);
1105 return (lex->tok.ttype = TOKEN_OPERATOR);
1108 if (isident_start(ch))
1112 lex_tokench(lex, ch);
1113 if (!lex_finish_ident(lex)) {
1115 return (lex->tok.ttype = TOKEN_ERROR);
1118 lex->tok.ttype = TOKEN_IDENT;
1121 if (!strcmp(v, "void")) {
1122 lex->tok.ttype = TOKEN_TYPENAME;
1123 lex->tok.constval.t = TYPE_VOID;
1124 } else if (!strcmp(v, "int")) {
1125 lex->tok.ttype = TOKEN_TYPENAME;
1126 lex->tok.constval.t = TYPE_INTEGER;
1127 } else if (!strcmp(v, "float")) {
1128 lex->tok.ttype = TOKEN_TYPENAME;
1129 lex->tok.constval.t = TYPE_FLOAT;
1130 } else if (!strcmp(v, "string")) {
1131 lex->tok.ttype = TOKEN_TYPENAME;
1132 lex->tok.constval.t = TYPE_STRING;
1133 } else if (!strcmp(v, "entity")) {
1134 lex->tok.ttype = TOKEN_TYPENAME;
1135 lex->tok.constval.t = TYPE_ENTITY;
1136 } else if (!strcmp(v, "vector")) {
1137 lex->tok.ttype = TOKEN_TYPENAME;
1138 lex->tok.constval.t = TYPE_VECTOR;
1139 } else if (!strcmp(v, "for") ||
1140 !strcmp(v, "while") ||
1143 !strcmp(v, "else") ||
1144 !strcmp(v, "local") ||
1145 !strcmp(v, "return") ||
1146 !strcmp(v, "not") ||
1147 !strcmp(v, "const"))
1149 lex->tok.ttype = TOKEN_KEYWORD;
1151 else if (opts_standard != COMPILER_QCC)
1153 /* other standards reserve these keywords */
1154 if (!strcmp(v, "switch") ||
1155 !strcmp(v, "struct") ||
1156 !strcmp(v, "union") ||
1157 !strcmp(v, "break") ||
1158 !strcmp(v, "continue") ||
1161 lex->tok.ttype = TOKEN_KEYWORD;
1165 return lex->tok.ttype;
1170 lex->flags.nodigraphs = true;
1171 if (lex->flags.preprocessing)
1172 lex_tokench(lex, ch);
1173 lex->tok.ttype = lex_finish_string(lex, '"');
1174 if (lex->flags.preprocessing)
1175 lex_tokench(lex, ch);
1176 while (!lex->flags.preprocessing && lex->tok.ttype == TOKEN_STRINGCONST)
1178 /* Allow c style "string" "continuation" */
1179 ch = lex_skipwhite(lex);
1181 lex_ungetch(lex, ch);
1185 lex->tok.ttype = lex_finish_string(lex, '"');
1187 lex->flags.nodigraphs = false;
1189 return lex->tok.ttype;
1194 /* we parse character constants like string,
1195 * but return TOKEN_CHARCONST, or a vector type if it fits...
1196 * Likewise actual unescaping has to be done by the parser.
1197 * The difference is we don't allow 'char' 'continuation'.
1199 if (lex->flags.preprocessing)
1200 lex_tokench(lex, ch);
1201 lex->tok.ttype = lex_finish_string(lex, '\'');
1202 if (lex->flags.preprocessing)
1203 lex_tokench(lex, ch);
1206 /* It's a vector if we can successfully scan 3 floats */
1208 if (sscanf_s(lex->tok.value, " %f %f %f ",
1209 &lex->tok.constval.v.x, &lex->tok.constval.v.y, &lex->tok.constval.v.z) == 3)
1211 if (sscanf(lex->tok.value, " %f %f %f ",
1212 &lex->tok.constval.v.x, &lex->tok.constval.v.y, &lex->tok.constval.v.z) == 3)
1216 lex->tok.ttype = TOKEN_VECTORCONST;
1219 return lex->tok.ttype;
1224 lex->tok.ttype = lex_finish_digit(lex, ch);
1226 return lex->tok.ttype;
1229 lexerror(lex, "unknown token");
1230 return (lex->tok.ttype = TOKEN_ERROR);