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annotate src/macro.c @ 17:df0c4a46af8f
Started adding expression handling infrastructure
| author | lost |
|---|---|
| date | Thu, 01 Jan 2009 02:26:26 +0000 |
| parents | 34568fab6058 |
| children | 035b95a3690f |
| rev | line source |
|---|---|
| 0 | 1 /* |
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34568fab6058
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2 macro.c |
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3 Copyright © 2008 William Astle |
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4 |
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5 This file is part of LWASM. |
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6 |
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7 LWASM is free software: you can redistribute it and/or modify it under the |
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34568fab6058
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8 terms of the GNU General Public License as published by the Free Software |
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9 Foundation, either version 3 of the License, or (at your option) any later |
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34568fab6058
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10 version. |
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11 |
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12 This program is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
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34568fab6058
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15 more details. |
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16 |
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17 You should have received a copy of the GNU General Public License along with |
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18 this program. If not, see <http://www.gnu.org/licenses/>. |
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19 |
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20 Contains stuff associated with macro processing |
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34568fab6058
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21 */ |
| 0 | 22 |
| 23 #include <ctype.h> | |
| 24 #include <stdlib.h> | |
| 25 #include <string.h> | |
| 26 #include "lwasm.h" | |
| 27 | |
| 28 extern void resolve_insn(asmstate_t *as, sourceline_t *cl); | |
| 29 | |
| 30 void pseudo_macro(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 31 { | |
| 32 macrotab_t *m; | |
| 33 | |
| 34 if (as -> inmacro) | |
| 35 { | |
| 36 errorp1(ERR_MACRO); | |
| 37 return; | |
| 38 } | |
| 39 as -> inmacro = 1; | |
| 40 if (as -> passnum != 1) | |
| 41 return; | |
| 42 | |
| 43 for (m = as -> macros; m; m = m -> next) | |
| 44 { | |
| 45 if (!strcmp(m -> name, cl -> symstr)) | |
| 46 break; | |
| 47 } | |
| 48 if (m) | |
| 49 { | |
| 50 errorp1(ERR_DUPSYM); | |
| 51 return; | |
| 52 } | |
| 53 m = calloc(sizeof(macrotab_t), 1); | |
| 54 m -> name = strdup(cl -> symstr); | |
| 55 m -> next = as -> macros; | |
| 56 as -> macros = m; | |
| 57 cl -> hassym = 0; | |
| 58 while (**optr && !isspace(**optr)) | |
| 59 (*optr)++; | |
| 60 cl -> macrodef = 1; | |
| 61 } | |
| 62 | |
| 63 void pseudo_endm(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 64 { | |
| 65 if (!as -> inmacro) | |
| 66 { | |
| 67 errorp1(ERR_ENDM); | |
| 68 return; | |
| 69 } | |
| 70 | |
| 71 as -> inmacro = 0; | |
| 72 cl -> macrodef = 1; | |
| 73 } | |
| 74 | |
| 75 int add_macro_line(asmstate_t *as, sourceline_t *cl, char *optr) | |
| 76 { | |
| 77 macroline_t *l; | |
| 78 | |
| 79 if (!as -> inmacro) | |
| 80 return 0; | |
| 81 | |
| 82 if (as -> passnum == 2) | |
| 83 return 1; | |
| 84 | |
| 85 l = calloc(sizeof(macroline_t), 1); | |
| 86 l -> linetext = strdup(optr); | |
| 87 if (as -> macros -> linetail) | |
| 88 as -> macros -> linetail -> next = l; | |
| 89 as -> macros -> linetail = l; | |
| 90 if (!(as -> macros -> linehead)) | |
| 91 as -> macros -> linehead = l; | |
| 92 return 1; | |
| 93 } | |
| 94 | |
| 95 void macro_add_to_buff(char **buff, int *loc, int *len, char c) | |
| 96 { | |
| 97 if (*loc == *len) | |
| 98 { | |
| 99 *buff = realloc(*buff, *len + 32); | |
| 100 *len += 32; | |
| 101 } | |
| 102 (*buff)[(*loc)++] = c; | |
| 103 } | |
| 104 | |
| 105 // this is just like a regular operation function | |
| 106 /* | |
| 107 macro args are references by "\n" where 1 <= n <= 9 | |
| 108 or by "\{n}"; a \ can be included by writing \\ | |
| 109 */ | |
| 110 void expand_macro(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 111 { | |
| 112 char **args = NULL; | |
| 113 int nargs = 0; | |
| 114 int c; | |
| 115 sourceline_t *nl; | |
| 116 int nline = 1; | |
| 117 macrotab_t *m; | |
| 118 macroline_t *ml; | |
| 119 char *buff = NULL; | |
| 120 int bufflen = 0, buffloc; | |
| 121 | |
| 122 m = cl -> macro; | |
| 123 | |
| 124 // step the first: parse arguments | |
| 125 while (**optr && !isspace(**optr)) | |
| 126 { | |
| 127 c = 0; | |
| 128 while ((*optr)[c] && !isspace((*optr)[c]) && (*optr)[c] != ',') | |
| 129 { | |
| 130 c++; | |
| 131 } | |
| 132 args = realloc(args, sizeof(char *) * (nargs + 1)); | |
| 133 args[nargs] = malloc(c + 1); | |
| 134 strncpy(args[nargs], *optr, c); | |
| 135 args[nargs][c] = '\0'; | |
| 136 nargs++; | |
| 137 *optr += c; | |
| 138 if (**optr == ',') | |
| 139 (*optr)++; | |
| 140 } | |
| 141 | |
| 142 // step the second: iterate over the lines and expand arguments and add | |
| 143 // them after "cl" | |
| 144 for (ml = m -> linehead; ml; ml = ml -> next) | |
| 145 { | |
| 146 nl = calloc(sizeof(sourceline_t), 1); | |
| 147 | |
| 148 nl -> lineno = nline++; | |
| 149 nl -> sourcefile = m -> name; | |
| 150 nl -> opcode = -1; | |
| 151 nl -> addrmode = -1; | |
| 152 nl -> addr = as -> addr; | |
| 153 nl -> dpval = as -> dpval; | |
| 154 nl -> prev = cl; | |
| 155 if (!(cl -> next)) | |
| 156 as -> source_tail = nl; | |
| 157 nl -> next = cl -> next; | |
| 158 cl -> next = nl; | |
| 159 | |
| 160 buffloc = 0; | |
| 161 c = 0; | |
| 162 while (ml -> linetext[c]) | |
| 163 { | |
| 164 int ch; | |
| 165 ch = ml -> linetext[c++]; | |
| 166 if (ch == '{') | |
| 167 { | |
| 168 int v = 0; | |
| 169 again: | |
| 170 ch = ml -> linetext[c++]; | |
| 171 if (!ch) | |
| 172 { | |
| 173 c--; | |
| 174 continue; | |
| 175 } | |
| 176 if (ch >= '0' && ch <= '9') | |
| 177 { | |
| 178 v = v * 10 + (ch - '0'); | |
| 179 goto again; | |
| 180 } | |
| 181 if (ch == '}') | |
| 182 { | |
| 183 v--; | |
| 184 if (v < nargs) | |
| 185 { | |
| 186 char *t; | |
| 187 for (t = args[v]; *t; t++) | |
| 188 { | |
| 189 macro_add_to_buff(&buff, &buffloc, &bufflen, *t); | |
| 190 } | |
| 191 } | |
| 192 continue; | |
| 193 } | |
| 194 else | |
| 195 continue; | |
| 196 } | |
| 197 else if (ch == '\\' && ml -> linetext[c]) | |
| 198 { | |
| 199 ch = ml -> linetext[c++]; | |
| 200 if (ch >= '1' && ch <= '9') | |
| 201 { | |
| 202 ch -= '1'; | |
| 203 if (ch < nargs) | |
| 204 { | |
| 205 char *t; | |
| 206 for (t = args[ch]; *t; t++) | |
| 207 { | |
| 208 macro_add_to_buff(&buff, &buffloc, &bufflen, *t); | |
| 209 } | |
| 210 } | |
| 211 } | |
| 212 else | |
| 213 { | |
| 214 c--; | |
| 215 macro_add_to_buff(&buff, &buffloc, &bufflen, '\\'); | |
| 216 } | |
| 217 } | |
| 218 else | |
| 219 { | |
| 220 macro_add_to_buff(&buff, &buffloc, &bufflen, ch); | |
| 221 } | |
| 222 } | |
| 223 macro_add_to_buff(&buff, &buffloc, &bufflen, 0); | |
| 224 nl -> line = strdup(buff); | |
| 225 | |
| 226 resolve_insn(as, nl); | |
| 227 cl = nl; | |
| 228 } | |
| 229 if (buff) | |
| 230 free(buff); | |
| 231 } |