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New module

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git-svn-id: svn://svn.cc65.org/cc65/trunk@355 b7a2c559-68d2-44c3-8de9-860c34a00d81
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cuz 2000-10-10 20:41:18 +00:00
parent 2bd62669ce
commit 1c2d6e984d
2 changed files with 262 additions and 0 deletions
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175
src/cc65/declattr.c Normal file
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/*****************************************************************************/
/* */
/* declattr.c */
/* */
/* Declaration attributes */
/* */
/* */
/* */
/* (C) 2000 Ullrich von Bassewitz */
/* Wacholderweg 14 */
/* D-70597 Stuttgart */
/* EMail: uz@musoftware.de */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
/* warranty. In no event will the authors be held liable for any damages */
/* arising from the use of this software. */
/* */
/* Permission is granted to anyone to use this software for any purpose, */
/* including commercial applications, and to alter it and redistribute it */
/* freely, subject to the following restrictions: */
/* */
/* 1. The origin of this software must not be misrepresented; you must not */
/* claim that you wrote the original software. If you use this software */
/* in a product, an acknowledgment in the product documentation would be */
/* appreciated but is not required. */
/* 2. Altered source versions must be plainly marked as such, and must not */
/* be misrepresented as being the original software. */
/* 3. This notice may not be removed or altered from any source */
/* distribution. */
/* */
/*****************************************************************************/
/* cc65 */
#include "error.h"
#include "scanner.h"
#include "symtab.h"
#include "typecmp.h"
#include "declattr.h"
/*****************************************************************************/
/* Data */
/*****************************************************************************/
/* Attribute names */
static const char* const AttrNames [atCount] = {
"alias",
};
/*****************************************************************************/
/* Code */
/*****************************************************************************/
static attrib_t FindAttribute (const char* Attr)
/* Search the attribute and return the corresponding attribute constant.
* Return atNone if the attribute name is not known.
*/
{
attrib_t A;
/* For now do a linear search */
for (A = 0; A < atCount; ++A) {
if (strcmp (Attr, AttrNames[A]) == 0) {
/* Found */
return A;
}
}
/* Not found */
return atNone;
}
static void AliasAttrib (const Declaration* D, DeclAttr* A)
/* Handle the "alias" attribute */
{
SymEntry* Sym;
/* Comma expected */
ConsumeComma ();
/* The next identifier is the name of the alias symbol */
if (CurTok.Tok != TOK_IDENT) {
Error (ERR_IDENT_EXPECTED);
return;
}
/* Lookup the symbol for this name, it must exist */
Sym = FindSym (CurTok.Ident);
if (Sym == 0) {
Error (ERR_UNKNOWN_IDENT, CurTok.Ident);
NextToken ();
return;
}
/* Since we have the symbol entry now, skip the name */
NextToken ();
/* Check if the types of the symbols are identical */
if (TypeCmp (D->Type, Sym->Type) < TC_EQUAL) {
/* Types are not identical */
Error (ERR_INCOMPATIBLE_TYPES);
return;
}
/* Attribute is verified, set the stuff in the attribute description */
A->AttrType = atAlias;
A->V.Sym = Sym;
}
void ParseAttribute (const Declaration* D, DeclAttr* A)
/* Parse an additional __attribute__ modifier */
{
attrib_t AttrType;
/* Initialize the attribute description with "no attribute" */
A->AttrType = atNone;
/* Do we have an attribute? */
if (CurTok.Tok != TOK_ATTRIBUTE) {
/* No attribute, bail out */
return;
}
/* Skip the attribute token */
NextToken ();
/* Expect two(!) open braces */
ConsumeLParen ();
ConsumeLParen ();
/* Identifier follows */
if (CurTok.Tok != TOK_IDENT) {
Error (ERR_IDENT_EXPECTED);
/* We should *really* try to recover here, but for now: */
return;
}
/* Map the attribute name to its id, then skip the identifier */
AttrType = FindAttribute (CurTok.Ident);
NextToken ();
/* Handle possible attributes */
switch (AttrType) {
case atAlias:
AliasAttrib (D, A);
break;
default:
/* Attribute not known, maybe typo */
Error (ERR_ILLEGAL_ATTRIBUTE);
break;
}
/* Read the two closing braces */
ConsumeRParen ();
ConsumeRParen ();
}

87
src/cc65/declattr.h Normal file
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/*****************************************************************************/
/* */
/* declattr.h */
/* */
/* Declaration attributes */
/* */
/* */
/* */
/* (C) 2000 Ullrich von Bassewitz */
/* Wacholderweg 14 */
/* D-70597 Stuttgart */
/* EMail: uz@musoftware.de */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
/* warranty. In no event will the authors be held liable for any damages */
/* arising from the use of this software. */
/* */
/* Permission is granted to anyone to use this software for any purpose, */
/* including commercial applications, and to alter it and redistribute it */
/* freely, subject to the following restrictions: */
/* */
/* 1. The origin of this software must not be misrepresented; you must not */
/* claim that you wrote the original software. If you use this software */
/* in a product, an acknowledgment in the product documentation would be */
/* appreciated but is not required. */
/* 2. Altered source versions must be plainly marked as such, and must not */
/* be misrepresented as being the original software. */
/* 3. This notice may not be removed or altered from any source */
/* distribution. */
/* */
/*****************************************************************************/
#ifndef DECLATTR_H
#define DECLATTR_H
#include "declare.h"
/*****************************************************************************/
/* Data */
/*****************************************************************************/
/* Supported attribute types */
typedef enum {
atNone = -1, /* No attribute */
atAlias, /* Alias declaration */
atCount /* Number of attributes */
} attrib_t;
/* An actual attribute description */
typedef struct DeclAttr DeclAttr;
struct DeclAttr {
attrib_t AttrType; /* Type of attribute */
union {
struct SymEntry* Sym; /* Symbol for alias */
} V;
};
/*****************************************************************************/
/* Code */
/*****************************************************************************/
void ParseAttribute (const Declaration* D, DeclAttr* A);
/* Parse an additional __attribute__ modifier */
/* End of declattr.h */
#endif