1 /*****************************************************************************/
5 /* Top level compiler subroutine */
9 /* (C) 2000-2009, Ullrich von Bassewitz */
10 /* Roemerstrasse 52 */
11 /* D-70794 Filderstadt */
12 /* EMail: uz@cc65.org */
15 /* This software is provided 'as-is', without any expressed or implied */
16 /* warranty. In no event will the authors be held liable for any damages */
17 /* arising from the use of this software. */
19 /* Permission is granted to anyone to use this software for any purpose, */
20 /* including commercial applications, and to alter it and redistribute it */
21 /* freely, subject to the following restrictions: */
23 /* 1. The origin of this software must not be misrepresented; you must not */
24 /* claim that you wrote the original software. If you use this software */
25 /* in a product, an acknowledgment in the product documentation would be */
26 /* appreciated but is not required. */
27 /* 2. Altered source versions must be plainly marked as such, and must not */
28 /* be misrepresented as being the original software. */
29 /* 3. This notice may not be removed or altered from any source */
32 /*****************************************************************************/
40 #include "debugflag.h"
66 /*****************************************************************************/
68 /*****************************************************************************/
72 static void Parse (void)
73 /* Top level parser routine. */
82 /* Parse until end of input */
83 while (CurTok.Tok != TOK_CEOF) {
87 /* Check for empty statements */
88 if (CurTok.Tok == TOK_SEMI) {
93 /* Check for an ASM statement (which is allowed also on global level) */
94 if (CurTok.Tok == TOK_ASM) {
100 /* Check for a #pragma */
101 if (CurTok.Tok == TOK_PRAGMA) {
106 /* Read variable defs and functions */
107 ParseDeclSpec (&Spec, SC_EXTERN | SC_STATIC, T_INT);
109 /* Don't accept illegal storage classes */
110 if ((Spec.StorageClass & SC_TYPE) == 0) {
111 if ((Spec.StorageClass & SC_AUTO) != 0 ||
112 (Spec.StorageClass & SC_REGISTER) != 0) {
113 Error ("Illegal storage class");
114 Spec.StorageClass = SC_EXTERN | SC_STATIC;
118 /* Check if this is only a type declaration */
119 if (CurTok.Tok == TOK_SEMI) {
120 CheckEmptyDecl (&Spec);
125 /* Read declarations for this type */
132 /* Read the next declaration */
133 ParseDecl (&Spec, &Decl, DM_NEED_IDENT);
134 if (Decl.Ident[0] == '\0') {
139 /* Check if we must reserve storage for the variable. We do this,
140 * if it is not a typedef or function, if we don't had a storage
141 * class given ("int i") or if the storage class is explicitly
142 * specified as static. This means that "extern int i" will not
143 * get storage allocated.
145 if ((Decl.StorageClass & SC_FUNC) != SC_FUNC &&
146 (Decl.StorageClass & SC_TYPEDEF) != SC_TYPEDEF &&
147 ((Spec.Flags & DS_DEF_STORAGE) != 0 ||
148 (Decl.StorageClass & (SC_STATIC | SC_EXTERN)) == SC_STATIC)) {
150 /* We will allocate storage */
151 Decl.StorageClass |= SC_STORAGE | SC_DEF;
154 /* If this is a function declarator that is not followed by a comma
155 * or semicolon, it must be followed by a function body. If this is
156 * the case, convert an empty parameter list into one accepting no
157 * parameters (same as void) as required by the standard.
159 if ((Decl.StorageClass & SC_FUNC) != 0 &&
160 (CurTok.Tok != TOK_COMMA) &&
161 (CurTok.Tok != TOK_SEMI)) {
163 FuncDesc* D = GetFuncDesc (Decl.Type);
164 if (D->Flags & FD_EMPTY) {
165 D->Flags = (D->Flags & ~(FD_EMPTY | FD_VARIADIC)) | FD_VOID_PARAM;
169 /* Add an entry to the symbol table */
170 Entry = AddGlobalSym (Decl.Ident, Decl.Type, Decl.StorageClass);
172 /* Add declaration attributes */
173 SymUseAttr (Entry, &Decl);
175 /* Reserve storage for the variable if we need to */
176 if (Decl.StorageClass & SC_STORAGE) {
178 /* Get the size of the variable */
179 unsigned Size = SizeOf (Decl.Type);
181 /* Allow initialization */
182 if (CurTok.Tok == TOK_ASSIGN) {
184 /* We cannot initialize types of unknown size, or
185 * void types in non ANSI mode.
188 if (!IsTypeVoid (Decl.Type)) {
189 if (!IsTypeArray (Decl.Type)) {
190 /* Size is unknown and not an array */
191 Error ("Variable `%s' has unknown size", Decl.Ident);
193 } else if (IS_Get (&Standard) != STD_CC65) {
194 /* We cannot declare variables of type void */
195 Error ("Illegal type for variable `%s'", Decl.Ident);
199 /* Switch to the data or rodata segment. For arrays, check
200 * the element qualifiers, since not the array but its
201 * elements are const.
203 if (IsQualConst (Decl.Type) ||
204 (IsTypeArray (Decl.Type) &&
205 IsQualConst (GetElementType (Decl.Type)))) {
212 g_defgloblabel (Entry->Name);
217 /* Parse the initialization */
218 ParseInit (Entry->Type);
221 if (IsTypeVoid (Decl.Type)) {
222 /* We cannot declare variables of type void */
223 Error ("Illegal type for variable `%s'", Decl.Ident);
224 Entry->Flags &= ~(SC_STORAGE | SC_DEF);
225 } else if (Size == 0) {
226 /* Size is unknown. Is it an array? */
227 if (!IsTypeArray (Decl.Type)) {
228 Error ("Variable `%s' has unknown size", Decl.Ident);
230 Entry->Flags &= ~(SC_STORAGE | SC_DEF);
233 /* Allocate storage if it is still needed */
234 if (Entry->Flags & SC_STORAGE) {
236 /* Switch to the BSS segment */
240 g_defgloblabel (Entry->Name);
242 /* Allocate space for uninitialized variable */
249 /* Check for end of declaration list */
250 if (CurTok.Tok == TOK_COMMA) {
258 /* Function declaration? */
259 if (Entry && IsTypeFunc (Entry->Type)) {
263 if (CurTok.Tok == TOK_SEMI) {
268 /* Function body. Check for duplicate function definitions */
269 if (SymIsDef (Entry)) {
270 Error ("Body for function `%s' has already been defined",
274 /* Parse the function body */
281 /* Must be followed by a semicolon */
290 void Compile (const char* FileName)
291 /* Top level compile routine. Will setup things and call the parser. */
298 /* Since strftime is locale dependent, we need the abbreviated month names
301 static const char MonthNames[12][4] = {
302 "Jan", "Feb", "Mar", "Apr", "May", "Jun",
303 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
306 /* Add macros that are always defined */
307 DefineNumericMacro ("__CC65__", GetVersionAsNumber ());
309 /* Language standard that is supported */
310 DefineNumericMacro ("__CC65_STD_C89__", STD_C89);
311 DefineNumericMacro ("__CC65_STD_C99__", STD_C99);
312 DefineNumericMacro ("__CC65_STD_CC65__", STD_CC65);
313 DefineNumericMacro ("__CC65_STD__", IS_Get (&Standard));
315 /* Optimization macros. Since no source code has been parsed for now, the
316 * IS_Get functions access the values in effect now, regardless of any
317 * changes using #pragma later.
319 if (IS_Get (&Optimize)) {
320 long CodeSize = IS_Get (&CodeSizeFactor);
321 DefineNumericMacro ("__OPT__", 1);
322 if (CodeSize > 100) {
323 DefineNumericMacro ("__OPT_i__", CodeSize);
325 if (IS_Get (&EnableRegVars)) {
326 DefineNumericMacro ("__OPT_r__", 1);
328 if (IS_Get (&InlineStdFuncs)) {
329 DefineNumericMacro ("__OPT_s__", 1);
333 /* __TIME__ and __DATE__ macros */
335 TM = localtime (&Time);
336 xsprintf (DateStr, sizeof (DateStr), "\"%s %2d %d\"",
337 MonthNames[TM->tm_mon], TM->tm_mday, TM->tm_year + 1900);
338 strftime (TimeStr, sizeof (TimeStr), "\"%H:%M:%S\"", TM);
339 DefineTextMacro ("__DATE__", DateStr);
340 DefineTextMacro ("__TIME__", TimeStr);
342 /* Other standard macros */
343 /* DefineNumericMacro ("__STDC__", 1); <- not now */
344 DefineNumericMacro ("__STDC_HOSTED__", 1);
346 /* Initialize the literal pool */
349 /* Create the base lexical level */
352 /* Generate the code generator preamble */
355 /* Open the input file */
356 OpenMainFile (FileName);
358 /* Are we supposed to compile or just preprocess the input? */
359 if (PreprocessOnly) {
364 /* Preprocess each line and write it to the output file */
365 while (NextLine ()) {
367 WriteOutput ("%.*s\n", (int) SB_GetLen (Line), SB_GetConstBuf (Line));
370 /* Close the output file */
374 PrintMacroStats (stdout);
379 /* Ok, start the ball rolling... */
382 /* Dump the literal pool. */
385 /* Write imported/exported symbols */
389 PrintLiteralPoolStats (stdout);
390 PrintMacroStats (stdout);
395 /* Leave the main lexical level */
398 /* Print an error report */