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332
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1 /*
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2 pass1.c
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3
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4 Copyright © 2010 William Astle
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5
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6 This file is part of LWTOOLS.
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7
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8 LWTOOLS is free software: you can redistribute it and/or modify it under the
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9 terms of the GNU General Public License as published by the Free Software
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10 Foundation, either version 3 of the License, or (at your option) any later
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11 version.
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12
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13 This program is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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16 more details.
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17
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18 You should have received a copy of the GNU General Public License along with
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19 this program. If not, see <http://www.gnu.org/licenses/>.
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20 */
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21
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22 #include <config.h>
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23
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24 #include <stdio.h>
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25
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26 #include <lw_alloc.h>
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27
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28 #include "lwasm.h"
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29 #include "input.h"
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30
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337
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31 /*
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32 pass 1: parse the lines
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33 */
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332
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34 void do_pass1(asmstate_t *as)
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35 {
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36 char *line;
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337
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37 line_t *cl;
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38
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332
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39 for (;;)
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40 {
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41 line = input_readline(as);
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42 if (!line)
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43 break;
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44 printf("%s\n", line);
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337
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45
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46 cl = lw_alloc(sizeof(line_t));
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47 cl -> next = NULL;
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48 cl -> prev = as -> line_tail;
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49 cl -> len = -1;
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50 cl -> insn = -1;
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51 if (!as -> line_tail)
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52 {
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53 as -> line_head = cl;
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54 cl -> addr = lw_expr_build(lw_expr_type_int, 0);
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55 }
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56 else
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57 {
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58 lw_expr_t te;
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59 as -> line_tail -> next = cl;
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60 te = lw_expr_build(lw_expr_type_special, lwasm_expr_linelen, cl -> prev);
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61 cl -> addr = lw_expr_build(lw_expr_type_oper, lw_expr_oper_plus, cl -> prev -> addr, te);
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62 lw_expr_destroy(te);
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63 lw_expr_simplify(cl -> addr);
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64 }
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65 as -> line_tail = cl;
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66
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67 lw_expr_print(cl -> addr);
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68 printf("\n");
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69 // now parse the line
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70
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332
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71 lw_free(line);
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72 }
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73 }
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