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annotate lwbasic/symtab.c @ 159:8967eb907324

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Trap negative sizes for [rz]m[bdq] and flag error
author lost@l-w.ca
date Sun, 28 Aug 2011 14:16:45 -0600
parents 49d608aecc4d
children
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1 /*
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2 symtab.c
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3
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4 Copyright © 2011 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 /*
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23 Symbol table handling
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24 */
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25
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26 #include <stdlib.h>
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27 #include <string.h>
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28
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29 #include <lw_alloc.h>
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30 #include <lw_string.h>
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31
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32 #define __symtab_c_seen__
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33 #include "symtab.h"
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34
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35 symtab_t *symtab_init(void)
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36 {
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37 symtab_t *st;
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38
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39 st = lw_alloc(sizeof(symtab_t));
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40 st -> head = NULL;
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41 return st;
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42 }
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43
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44 void symtab_destroy(symtab_t *st)
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45 {
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46 symtab_entry_t *se;
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47
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48 while (st -> head)
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49 {
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50 se = st -> head;
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51 st -> head = se -> next;
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52 lw_free(se -> name);
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53 lw_free(se -> privdata);
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54 lw_free(se);
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55 }
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56 lw_free(st);
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57 }
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58
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59 symtab_entry_t *symtab_find(symtab_t *st, char *name)
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60 {
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61 symtab_entry_t *se;
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62
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63 for (se = st -> head; se; se = se -> next)
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64 {
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65 if (strcmp(se -> name, name) == 0)
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66 return se;
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67 }
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68 return NULL;
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69 }
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70
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71 void symtab_register(symtab_t *st, char *name, int addr, int symtype, void *privdata)
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72 {
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73 symtab_entry_t *se;
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74
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75 se = lw_alloc(sizeof(symtab_entry_t));
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76 se -> name = lw_strdup(name);
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77 se -> addr = addr;
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78 se -> symtype = symtype;
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79 se -> privdata = privdata;
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80 se -> next = st -> head;
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81 st -> head = se;
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82 }