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view lwcc/token.c @ 556:928c033c0cd0
Allow MOD directive to accept only the standard base header parameters
There are cases where only the standard OS9 module header fields are to be
provided. This could be, for instance, in the case of a nonstandard user
type module. So allow the execution offset and data size fields to be
omitted entirely and handle the module length correctly as well.
author | William Astle <lost@l-w.ca> |
---|---|
date | Fri, 08 Sep 2023 00:32:40 -0600 |
parents | 54f213c8fb81 |
children |
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/* lwcc/token.c Copyright © 2013 William Astle This file is part of LWTOOLS. LWTOOLS is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include <stdlib.h> #include <lw_alloc.h> #include <lw_string.h> #include "token.h" struct token *token_create(int ttype, char *strval, int row, int col, const char *fn) { struct token *t; t = lw_alloc(sizeof(struct token)); t -> ttype = ttype; if (strval) t -> strval = lw_strdup(strval); else t -> strval = NULL; t -> lineno = row; t -> column = col; t -> fn = fn; t -> next = NULL; t -> prev = NULL; t -> list = NULL; return t; } void token_free(struct token *t) { lw_free(t -> strval); lw_free(t); } struct token *token_dup(struct token *t) { struct token *t2; t2 = lw_alloc(sizeof(struct token)); t2 -> ttype = t -> ttype; t2 -> lineno = t -> lineno; t2 -> column = t -> column; t2 -> list = NULL; t2 -> next = NULL; t2 -> prev = NULL; if (t -> strval) t2 -> strval = lw_strdup(t -> strval); else t2 -> strval = NULL; return t2; } static struct { int ttype; char *tstr; } tok_strs[] = { { TOK_WSPACE, " " }, { TOK_EOL, "\n" }, { TOK_DIV, "/" }, { TOK_ADD, "+" }, { TOK_SUB, "-" }, { TOK_OPAREN, "(" }, { TOK_CPAREN, ")" }, { TOK_NE, "!=" }, { TOK_EQ, "==" }, { TOK_LE, "<=" }, { TOK_LT, "<" }, { TOK_GE, ">=" }, { TOK_GT, ">" }, { TOK_BAND, "&&" }, { TOK_BOR, "||" }, { TOK_BNOT, "!" }, { TOK_MOD, "%"}, { TOK_COMMA, "," }, { TOK_ELLIPSIS, "..." }, { TOK_QMARK, "?" }, { TOK_COLON, ":" }, { TOK_OBRACE, "{" }, { TOK_CBRACE, "}" }, { TOK_OSQUARE, "[" }, { TOK_CSQUARE, "]" }, { TOK_COM, "~" }, { TOK_EOS, ";" }, { TOK_HASH, "#" }, { TOK_DBLHASH, "##" }, { TOK_XOR, "^" }, { TOK_XORASS, "^=" }, { TOK_STAR, "*" }, { TOK_MULASS, "*=" }, { TOK_DIVASS, "/=" }, { TOK_ASS, "=" }, { TOK_MODASS, "%=" }, { TOK_SUBASS, "-=" }, { TOK_DBLSUB, "--" }, { TOK_ADDASS, "+=" }, { TOK_DBLADD, "++" }, { TOK_BWAND, "&" }, { TOK_BWANDASS, "&=" }, { TOK_BWOR, "|" }, { TOK_BWORASS, "|=" }, { TOK_LSH, "<<" }, { TOK_LSHASS, "<<=" }, { TOK_RSH, ">>" }, { TOK_RSHASS, ">>=" }, { TOK_DOT, "." }, { TOK_ARROW, "->" }, { TOK_NONE, "" } }; void token_print(struct token *t, FILE *f) { int i; for (i = 0; tok_strs[i].ttype != TOK_NONE; i++) { if (tok_strs[i].ttype == t -> ttype) { fprintf(f, "%s", tok_strs[i].tstr); break; } } if (t -> strval) fprintf(f, "%s", t -> strval); } /* token list management */ struct token_list *token_list_create(void) { struct token_list *tl; tl = lw_alloc(sizeof(struct token_list)); tl -> head = NULL; tl -> tail = NULL; return tl; } void token_list_destroy(struct token_list *tl) { if (tl == NULL) return; while (tl -> head) { tl -> tail = tl -> head; tl -> head = tl -> head -> next; token_free(tl -> tail); } lw_free(tl); } void token_list_append(struct token_list *tl, struct token *tok) { tok -> list = tl; if (tl -> head == NULL) { tl -> head = tl -> tail = tok; tok -> next = tok -> prev = NULL; return; } tl -> tail -> next = tok; tok -> prev = tl -> tail; tl -> tail = tok; tok -> next = NULL; return; } void token_list_remove(struct token *tok) { if (tok -> list == NULL) return; if (tok -> prev) tok -> prev -> next = tok -> next; if (tok -> next) tok -> next -> prev = tok -> prev; if (tok == tok -> list -> head) tok -> list -> head = tok -> next; if (tok == tok -> list -> tail) tok -> list -> tail = tok -> prev; tok -> list = NULL; } void token_list_prepend(struct token_list *tl, struct token *tok) { tok -> list = tl; if (tl -> head == NULL) { tl -> head = tl -> tail = tok; tok -> next = tok -> prev = NULL; } tl -> head -> prev = tok; tok -> next = tl -> head; tl -> head = tok; tok -> prev = NULL; } void token_list_insert(struct token_list *tl, struct token *after, struct token *newt) { struct token *t; if (after == NULL || tl -> head == NULL) { token_list_prepend(tl, newt); return; } for (t = tl -> head; t && t != after; t = t -> next) /* do nothing */ ; if (!t) { token_list_append(tl, newt); return; } newt -> prev = t; newt -> next = t -> next; if (t -> next) t -> next -> prev = newt; else tl -> tail = newt; t -> next = newt; } struct token_list *token_list_dup(struct token_list *tl) { struct token_list *nl; struct token *t; nl = token_list_create(); for (t = tl -> head; t; t = t -> next) { token_list_append(nl, token_dup(t)); } return nl; }