mirror of
https://github.com/cc65/cc65.git
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1826 lines
54 KiB
C
1826 lines
54 KiB
C
/*****************************************************************************/
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/* */
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/* preproc.c */
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/* */
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/* cc65 preprocessor */
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/* */
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/* */
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/* */
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/* (C) 1998-2010, Ullrich von Bassewitz */
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/* Roemerstrasse 52 */
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/* D-70794 Filderstadt */
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/* EMail: uz@cc65.org */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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/* common */
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#include "chartype.h"
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#include "check.h"
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#include "inline.h"
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#include "print.h"
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#include "xmalloc.h"
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/* cc65 */
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#include "codegen.h"
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#include "error.h"
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#include "global.h"
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#include "ident.h"
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#include "incpath.h"
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#include "input.h"
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#include "lineinfo.h"
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#include "macrotab.h"
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#include "ppexpr.h"
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#include "preproc.h"
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#include "scanner.h"
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#include "scanstrbuf.h"
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#include "standard.h"
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/*****************************************************************************/
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/* Data */
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/*****************************************************************************/
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/* Macro scanner mode flags */
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#define MSM_NONE 0x00U /* Default */
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#define MSM_MULTILINE 0x01U /* Read from multiple lines */
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#define MSM_IN_DIRECTIVE 0x02U /* In PP directives scan */
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#define MSM_IN_ARG_LIST 0x04U /* In macro argument scan */
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#define MSM_IN_ARG_EXPANSION 0x08U /* In expansion on arguments */
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#define MSM_OP_DEFINED 0x10U /* Handle the defined operator */
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#define MSM_OP_HAS_INCLUDE 0x20U /* Handle the __has_include operator */
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#define MSM_OP_HAS_C_ATTRIBUTE 0x40U /* Handle the __has_c_attribute operator */
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#define MSM_TOK_HEADER 0x80U /* Support header tokens */
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/* Management data for #if */
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#define IFCOND_NONE 0x00U
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#define IFCOND_SKIP 0x01U
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#define IFCOND_ELSE 0x02U
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#define IFCOND_NEEDTERM 0x04U
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/* Current PP if stack */
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static PPIfStack* PPStack;
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/* Intermediate input buffers */
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static StrBuf* PLine; /* Buffer for macro expansion */
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static StrBuf* MLine; /* Buffer for macro expansion in #pragma */
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static StrBuf* OLine; /* Buffer for #pragma output */
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/* Newlines to be added to preprocessed text */
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static int PendingNewLines;
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static int FileChanged;
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/* Structure used when expanding macros */
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typedef struct MacroExp MacroExp;
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struct MacroExp {
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Collection ActualArgs; /* Actual arguments */
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StrBuf Replacement; /* Replacement with arguments substituted */
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};
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/*****************************************************************************/
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/* Forwards */
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/*****************************************************************************/
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static void TranslationPhase3 (StrBuf* Source, StrBuf* Target);
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/* Mimic Translation Phase 3. Handle old and new style comments. Collapse
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** non-newline whitespace sequences.
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*/
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static void PreprocessDirective (StrBuf* Source, StrBuf* Target, unsigned ModeFlags);
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/* Preprocess a single line. Handle specified tokens and operators, remove
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** whitespace and comments, then do macro replacement.
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*/
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static int ParseDirectives (unsigned ModeFlags);
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/* Handle directives. Return 1 if any whitespace or newlines are parsed. */
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static void MacroReplacement (StrBuf* Source, StrBuf* Target, unsigned ModeFlags);
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/* Scan for and perform macro replacement */
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/*****************************************************************************/
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/* Low level preprocessor token handling */
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/*****************************************************************************/
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/* Types of preprocessor directives */
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typedef enum {
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PPD_ILLEGAL = -1,
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PPD_DEFINE,
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PPD_ELIF,
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PPD_ELSE,
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PPD_ENDIF,
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PPD_ERROR,
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PPD_IF,
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PPD_IFDEF,
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PPD_IFNDEF,
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PPD_INCLUDE,
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PPD_LINE,
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PPD_PRAGMA,
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PPD_UNDEF,
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PPD_WARNING,
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} ppdirective_t;
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/* Preprocessor directive tokens mapping table */
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static const struct PPDType {
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const char* Tok; /* Token */
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ppdirective_t Type; /* Type */
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} PPDTypes[] = {
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{ "define", PPD_DEFINE },
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{ "elif", PPD_ELIF },
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{ "else", PPD_ELSE },
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{ "endif", PPD_ENDIF },
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{ "error", PPD_ERROR },
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{ "if", PPD_IF },
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{ "ifdef", PPD_IFDEF },
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{ "ifndef", PPD_IFNDEF },
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{ "include", PPD_INCLUDE },
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{ "line", PPD_LINE },
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{ "pragma", PPD_PRAGMA },
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{ "undef", PPD_UNDEF },
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{ "warning", PPD_WARNING },
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};
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/* Number of preprocessor directive types */
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#define PPDTOKEN_COUNT (sizeof(PPDTypes) / sizeof(PPDTypes[0]))
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static int CmpToken (const void* Key, const void* Elem)
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/* Compare function for bsearch */
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{
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return strcmp ((const char*) Key, ((const struct PPDType*) Elem)->Tok);
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}
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static ppdirective_t FindPPDirectiveType (const char* Ident)
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/* Find a preprocessor directive type and return it. Return PPD_ILLEGAL if the
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** identifier is not a valid preprocessor directive token.
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*/
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{
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struct PPDType* P;
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P = bsearch (Ident, PPDTypes, PPDTOKEN_COUNT, sizeof (PPDTypes[0]), CmpToken);
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return P? P->Type : PPD_ILLEGAL;
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}
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/*****************************************************************************/
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/* struct MacroExp */
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/*****************************************************************************/
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static MacroExp* InitMacroExp (MacroExp* E)
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/* Initialize a MacroExp structure */
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{
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InitCollection (&E->ActualArgs);
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SB_Init (&E->Replacement);
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return E;
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}
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static void DoneMacroExp (MacroExp* E)
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/* Cleanup after use of a MacroExp structure */
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{
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unsigned I;
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/* Delete the list with actual arguments */
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for (I = 0; I < CollCount (&E->ActualArgs); ++I) {
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FreeStrBuf (CollAtUnchecked (&E->ActualArgs, I));
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}
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DoneCollection (&E->ActualArgs);
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SB_Done (&E->Replacement);
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}
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static void ME_AppendActual (MacroExp* E, StrBuf* Arg)
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/* Add a copy of Arg to the list of actual macro arguments.
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** NOTE: This function will clear Arg!
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*/
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{
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/* Create a new string buffer */
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StrBuf* A = NewStrBuf ();
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/* Move the contents of Arg to A */
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SB_Move (A, Arg);
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/* Add A to the actual arguments */
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CollAppend (&E->ActualArgs, A);
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}
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static StrBuf* ME_GetActual (MacroExp* E, unsigned Index)
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/* Return an actual macro argument with the given index */
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{
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return CollAt (&E->ActualArgs, Index);
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}
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static int ME_ArgIsVariadic (const MacroExp* E, const Macro* M)
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/* Return true if the next actual argument we will add is a variadic one */
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{
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return (M->Variadic &&
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M->ArgCount == (int) CollCount (&E->ActualArgs) + 1);
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}
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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static int MacName (char* Ident)
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/* Get a macro symbol name into Ident. If we have an error, print a
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** diagnostic message and clear the line.
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*/
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{
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if (IsSym (Ident) == 0) {
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if (CurC != '\0') {
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PPError ("Macro name must be an identifier");
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} else {
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PPError ("Missing macro name");
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}
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ClearLine ();
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return 0;
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} else {
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return 1;
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}
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}
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static void AddPreLine (StrBuf* Str)
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/* Add newlines to the string buffer */
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{
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if (!PreprocessOnly) {
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PendingNewLines = 0;
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return;
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}
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if (FileChanged || PendingNewLines > 6) {
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/* Output #line directives as source info */
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StrBuf Comment = AUTO_STRBUF_INITIALIZER;
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if (SB_NotEmpty (Str) && SB_LookAtLast (Str) != '\n') {
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SB_AppendChar (Str, '\n');
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}
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SB_Printf (&Comment, "#line %u \"%s\"\n", GetCurrentLine (), GetCurrentFile ());
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SB_Append (Str, &Comment);
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} else {
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/* Output new lines */
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while (PendingNewLines > 0) {
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SB_AppendChar (Str, '\n');
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--PendingNewLines;
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}
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}
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FileChanged = 0;
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PendingNewLines = 0;
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}
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static void AppendIndent (StrBuf* Str, int Count)
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/* Add Count of spaces ' ' to the string buffer */
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{
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while (Count > 0) {
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SB_AppendChar (Str, ' ');
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--Count;
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}
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}
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static void Stringize (StrBuf* Source, StrBuf* Target)
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/* Stringize the given string: Add double quotes at start and end and preceed
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** each occurance of " and \ by a backslash.
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*/
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{
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char C;
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/* Add a starting quote */
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SB_AppendChar (Target, '\"');
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/* Replace any characters inside the string may not be part of a string
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** unescaped.
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*/
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while ((C = SB_Get (Source)) != '\0') {
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switch (C) {
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case '\"':
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case '\\':
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SB_AppendChar (Target, '\\');
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/* FALLTHROUGH */
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default:
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SB_AppendChar (Target, C);
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break;
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}
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}
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/* Add the closing quote */
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SB_AppendChar (Target, '\"');
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}
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static void OldStyleComment (void)
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/* Remove an old style C comment from line. */
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{
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/* Remember the current line number, so we can output better error
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** messages if the comment is not terminated in the current file.
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*/
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unsigned StartingLine = GetCurrentLine ();
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/* Skip the start of comment chars */
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NextChar ();
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NextChar ();
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/* Skip the comment */
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while (CurC != '*' || NextC != '/') {
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if (CurC == '\0') {
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if (NextLine () == 0) {
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PPError ("End-of-file reached in comment starting at line %u",
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StartingLine);
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return;
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}
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} else {
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if (CurC == '/' && NextC == '*') {
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PPWarning ("'/*' found inside a comment");
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}
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NextChar ();
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}
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}
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/* Skip the end of comment chars */
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NextChar ();
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NextChar ();
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}
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static void NewStyleComment (void)
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/* Remove a new style C comment from line. */
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{
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/* Diagnose if this is unsupported */
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if (IS_Get (&Standard) < STD_C99 && !AllowNewComments) {
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PPError ("C++ style comments are not allowed in C89");
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PPNote ("(this will be reported only once per input file)");
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AllowNewComments = 1;
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}
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/* Beware: Because line continuation chars are handled when reading
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** lines, we may only skip until the end of the source line, which
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** may not be the same as the end of the input line. The end of the
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** source line is denoted by a lf (\n) character.
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*/
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do {
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NextChar ();
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} while (CurC != '\n' && CurC != '\0');
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if (CurC == '\n') {
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NextChar ();
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}
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}
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static int SkipWhitespace (int SkipLines)
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/* Skip white space and comments in the input stream. If skipLines is true,
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** also skip newlines and add that count to global PendingNewLines. Return 1
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** if the last skipped character was a white space other than a newline '\n',
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** otherwise return -1 if there were any newline characters skipped, otherwise
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** return 0 if nothing was skipped.
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*/
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{
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int Skipped = 0;
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int NewLine = 0;
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while (1) {
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if (IsSpace (CurC)) {
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NextChar ();
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Skipped = 1;
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} else if (CurC == '/' && NextC == '*') {
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OldStyleComment ();
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Skipped = 1;
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} else if (CurC == '/' && NextC == '/') {
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NewStyleComment ();
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Skipped = 1;
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} else if (CurC == '\0' && SkipLines) {
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/* End of line, read next */
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if (NextLine () != 0) {
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++PendingNewLines;
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NewLine = 1;
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Skipped = 0;
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} else {
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/* End of input */
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break;
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}
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} else {
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/* No more white space */
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break;
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}
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}
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return Skipped != 0 ? Skipped : -(NewLine != 0);
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}
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static void CopyHeaderNameToken (StrBuf* Target)
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/* Copy a header name from the input to Target. */
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{
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/* Remember the quote character, copy it to the target buffer and skip it */
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char Quote = CurC == '"' ? '"' : '>';
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SB_AppendChar (Target, CurC);
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NextChar ();
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/* Copy the characters inside the string */
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while (CurC != '\0' && CurC != Quote) {
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/* Keep an escaped char */
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if (CurC == '\\') {
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SB_AppendChar (Target, CurC);
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NextChar ();
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}
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/* Copy the character */
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SB_AppendChar (Target, CurC);
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NextChar ();
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}
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/* If we had a terminating quote, copy it */
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if (CurC != '\0') {
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SB_AppendChar (Target, CurC);
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NextChar ();
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}
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}
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static void CopyQuotedString (StrBuf* Target)
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/* Copy a single or double quoted string from the input to Target. */
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{
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/* Remember the quote character, copy it to the target buffer and skip it */
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char Quote = CurC;
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SB_AppendChar (Target, CurC);
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NextChar ();
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/* Copy the characters inside the string */
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while (CurC != '\0' && CurC != Quote) {
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/* Keep an escaped char */
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if (CurC == '\\') {
|
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SB_AppendChar (Target, CurC);
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NextChar ();
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}
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/* Copy the character */
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SB_AppendChar (Target, CurC);
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NextChar ();
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}
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/* If we had a terminating quote, copy it */
|
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if (CurC != '\0') {
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SB_AppendChar (Target, CurC);
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NextChar ();
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} else {
|
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PPWarning ("Missing terminating %c character", Quote);
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}
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}
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static int CheckExtraTokens (const char* Name)
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/* Check for extra tokens at the end of the directive. Return 1 if there are
|
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** extra tokens, otherwise 0.
|
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*/
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{
|
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SkipWhitespace (0);
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if (SB_GetIndex (Line) != SB_GetLen (Line)) {
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PPWarning ("Extra tokens at end of #%s directive", Name);
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return 1;
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}
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return 0;
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}
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|
|
|
|
|
|
/*****************************************************************************/
|
|
/* Macro stuff */
|
|
/*****************************************************************************/
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|
|
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|
|
static void ReadMacroArgs (MacroExp* E, const Macro* M, int MultiLine)
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|
/* Identify the arguments to a macro call as-is */
|
|
{
|
|
int MissingParen = 0;
|
|
unsigned Parens; /* Number of open parenthesis */
|
|
StrBuf Arg = AUTO_STRBUF_INITIALIZER;
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/* Eat the left paren */
|
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NextChar ();
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|
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/* Read the actual macro arguments */
|
|
Parens = 0;
|
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while (1) {
|
|
/* Squeeze runs of blanks within an arg */
|
|
int OldPendingNewLines = PendingNewLines;
|
|
int Skipped = SkipWhitespace (MultiLine);
|
|
if (MultiLine && CurC == '#') {
|
|
int Newlines = 0;
|
|
|
|
while (CurC == '#') {
|
|
Newlines += PendingNewLines - OldPendingNewLines;
|
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PendingNewLines = OldPendingNewLines;
|
|
OldPendingNewLines = 0;
|
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Skipped = ParseDirectives (MSM_IN_ARG_LIST) || Skipped;
|
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Skipped = SkipWhitespace (MultiLine) || Skipped;
|
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}
|
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PendingNewLines += Newlines;
|
|
}
|
|
if (Skipped && SB_NotEmpty (&Arg)) {
|
|
SB_AppendChar (&Arg, ' ');
|
|
}
|
|
if (CurC == '(') {
|
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|
|
/* Nested parenthesis */
|
|
SB_AppendChar (&Arg, CurC);
|
|
NextChar ();
|
|
++Parens;
|
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|
|
} else if (IsQuote (CurC)) {
|
|
|
|
/* Quoted string - just copy */
|
|
CopyQuotedString (&Arg);
|
|
|
|
} else if (CurC == ',' || CurC == ')') {
|
|
|
|
if (Parens) {
|
|
/* Comma or right paren inside nested parenthesis */
|
|
if (CurC == ')') {
|
|
--Parens;
|
|
}
|
|
SB_AppendChar (&Arg, CurC);
|
|
NextChar ();
|
|
} else if (CurC == ',' && ME_ArgIsVariadic (E, M)) {
|
|
/* It's a comma, but we're inside a variadic macro argument, so
|
|
** just copy it and proceed.
|
|
*/
|
|
SB_AppendChar (&Arg, CurC);
|
|
NextChar ();
|
|
} else {
|
|
/* End of actual argument. Remove whitespace from the end. */
|
|
while (IsSpace (SB_LookAtLast (&Arg))) {
|
|
SB_Drop (&Arg, 1);
|
|
}
|
|
|
|
/* If this is not the single empty argument for a macro with
|
|
** an empty argument list, remember it.
|
|
*/
|
|
if (CurC != ')' || SB_NotEmpty (&Arg) || M->ArgCount > 0) {
|
|
ME_AppendActual (E, &Arg);
|
|
}
|
|
|
|
/* Check for end of macro param list */
|
|
if (CurC == ')') {
|
|
NextChar ();
|
|
break;
|
|
}
|
|
|
|
/* Start the next param */
|
|
NextChar ();
|
|
SB_Clear (&Arg);
|
|
}
|
|
} else if (CurC == '\0') {
|
|
/* End of input inside macro argument list */
|
|
PPError ("Unterminated argument list invoking macro '%s'", M->Name);
|
|
MissingParen = 1;
|
|
ClearLine ();
|
|
break;
|
|
} else {
|
|
/* Just copy the character */
|
|
SB_AppendChar (&Arg, CurC);
|
|
NextChar ();
|
|
}
|
|
}
|
|
|
|
/* Compare formal and actual argument count */
|
|
if (CollCount (&E->ActualArgs) != (unsigned) M->ArgCount) {
|
|
|
|
if (!MissingParen) {
|
|
/* Argument count mismatch */
|
|
PPError ("Macro argument count mismatch");
|
|
}
|
|
|
|
/* Be sure to make enough empty arguments available */
|
|
SB_Clear (&Arg);
|
|
while (CollCount (&E->ActualArgs) < (unsigned) M->ArgCount) {
|
|
ME_AppendActual (E, &Arg);
|
|
}
|
|
}
|
|
|
|
/* Deallocate string buf resources */
|
|
SB_Done (&Arg);
|
|
}
|
|
|
|
|
|
|
|
static void SubstMacroArgs (MacroExp* E, Macro* M)
|
|
/* Argument substitution according to ISO/IEC 9899:1999 (E), 6.10.3.1ff */
|
|
{
|
|
ident Ident;
|
|
int ArgIdx;
|
|
StrBuf* OldSource;
|
|
StrBuf* Arg;
|
|
int HaveSpace;
|
|
|
|
|
|
/* Remember the current input and switch to the macro replacement. */
|
|
int OldIndex = SB_GetIndex (&M->Replacement);
|
|
SB_Reset (&M->Replacement);
|
|
OldSource = InitLine (&M->Replacement);
|
|
|
|
/* Argument handling loop */
|
|
while (CurC != '\0') {
|
|
|
|
/* If we have an identifier, check if it's a macro */
|
|
if (IsSym (Ident)) {
|
|
|
|
/* Check if it's a macro argument */
|
|
if ((ArgIdx = FindMacroArg (M, Ident)) >= 0) {
|
|
|
|
/* A macro argument. Get the corresponding actual argument. */
|
|
Arg = ME_GetActual (E, ArgIdx);
|
|
|
|
/* Copy any following whitespace */
|
|
HaveSpace = SkipWhitespace (0);
|
|
|
|
/* If a ## operator follows, we have to insert the actual
|
|
** argument as is, otherwise it must be macro replaced.
|
|
*/
|
|
if (CurC == '#' && NextC == '#') {
|
|
|
|
/* ### Add placemarker if necessary */
|
|
SB_Append (&E->Replacement, Arg);
|
|
|
|
} else {
|
|
|
|
/* Replace the formal argument by a macro replaced copy
|
|
** of the actual.
|
|
*/
|
|
SB_Reset (Arg);
|
|
MacroReplacement (Arg, &E->Replacement, 0);
|
|
|
|
/* If we skipped whitespace before, re-add it now */
|
|
if (HaveSpace) {
|
|
SB_AppendChar (&E->Replacement, ' ');
|
|
}
|
|
}
|
|
|
|
|
|
} else {
|
|
|
|
/* An identifier, keep it */
|
|
SB_AppendStr (&E->Replacement, Ident);
|
|
|
|
}
|
|
|
|
} else if (CurC == '#' && NextC == '#') {
|
|
|
|
/* ## operator. */
|
|
NextChar ();
|
|
NextChar ();
|
|
SkipWhitespace (0);
|
|
|
|
/* Since we need to concatenate the token sequences, remove
|
|
** any whitespace that was added to target, since it must come
|
|
** from the input.
|
|
*/
|
|
while (IsSpace (SB_LookAtLast (&E->Replacement))) {
|
|
SB_Drop (&E->Replacement, 1);
|
|
}
|
|
|
|
/* If the next token is an identifier which is a macro argument,
|
|
** replace it, otherwise do nothing.
|
|
*/
|
|
if (IsSym (Ident)) {
|
|
|
|
/* Check if it's a macro argument */
|
|
if ((ArgIdx = FindMacroArg (M, Ident)) >= 0) {
|
|
|
|
/* Get the corresponding actual argument and add it. */
|
|
SB_Append (&E->Replacement, ME_GetActual (E, ArgIdx));
|
|
|
|
} else {
|
|
|
|
/* Just an ordinary identifier - add as is */
|
|
SB_AppendStr (&E->Replacement, Ident);
|
|
|
|
}
|
|
}
|
|
|
|
} else if (CurC == '#' && M->ArgCount >= 0) {
|
|
|
|
/* A # operator within a macro expansion of a function like
|
|
** macro. Read the following identifier and check if it's a
|
|
** macro parameter.
|
|
*/
|
|
NextChar ();
|
|
SkipWhitespace (0);
|
|
if (!IsSym (Ident) || (ArgIdx = FindMacroArg (M, Ident)) < 0) {
|
|
PPError ("'#' is not followed by a macro parameter");
|
|
} else {
|
|
/* Make a valid string from Replacement */
|
|
Arg = ME_GetActual (E, ArgIdx);
|
|
SB_Reset (Arg);
|
|
Stringize (Arg, &E->Replacement);
|
|
}
|
|
|
|
} else if (IsQuote (CurC)) {
|
|
CopyQuotedString (&E->Replacement);
|
|
} else {
|
|
SB_AppendChar (&E->Replacement, CurC);
|
|
NextChar ();
|
|
}
|
|
}
|
|
|
|
#if 0
|
|
/* Remove whitespace from the end of the line */
|
|
while (IsSpace (SB_LookAtLast (&E->Replacement))) {
|
|
SB_Drop (&E->Replacement, 1);
|
|
}
|
|
#endif
|
|
|
|
/* Switch back the input */
|
|
InitLine (OldSource);
|
|
SB_SetIndex (&M->Replacement, OldIndex);
|
|
}
|
|
|
|
|
|
|
|
static void ExpandMacro (StrBuf* Target, Macro* M, int MultiLine)
|
|
/* Expand a macro into Target */
|
|
{
|
|
MacroExp E;
|
|
|
|
#if 0
|
|
static unsigned V = 0;
|
|
printf ("Expanding %s(%u)\n", M->Name, ++V);
|
|
#endif
|
|
|
|
/* Initialize our MacroExp structure */
|
|
InitMacroExp (&E);
|
|
|
|
/* Check if this is a function like macro */
|
|
if (M->ArgCount >= 0) {
|
|
|
|
/* Read the actual macro arguments (with the enclosing parentheses) */
|
|
ReadMacroArgs (&E, M, MultiLine);
|
|
|
|
}
|
|
|
|
/* Replace macro arguments handling the # and ## operators */
|
|
SubstMacroArgs (&E, M);
|
|
|
|
/* Forbide repeated expansion of the same macro in use */
|
|
M->Expanding = 1;
|
|
MacroReplacement (&E.Replacement, Target, 0);
|
|
M->Expanding = 0;
|
|
|
|
#if 0
|
|
printf ("Done with %s(%u)\n", E.M->Name, V--);
|
|
#endif
|
|
|
|
/* Free memory allocated for the macro expansion structure */
|
|
DoneMacroExp (&E);
|
|
}
|
|
|
|
|
|
|
|
static void MacroReplacement (StrBuf* Source, StrBuf* Target, unsigned ModeFlags)
|
|
/* Scan for and perform macro replacement */
|
|
{
|
|
ident Ident;
|
|
|
|
/* Remember the current input and switch to Source */
|
|
StrBuf* OldSource = InitLine (Source);
|
|
|
|
/* Loop substituting macros */
|
|
while (CurC != '\0') {
|
|
/* If we have an identifier, check if it's a macro */
|
|
if (IsSym (Ident)) {
|
|
if ((ModeFlags & MSM_OP_DEFINED) != 0 && strcmp (Ident, "defined") == 0) {
|
|
/* Handle the "defined" operator */
|
|
int HaveParen = 0;
|
|
|
|
SkipWhitespace (0);
|
|
if (CurC == '(') {
|
|
HaveParen = 1;
|
|
NextChar ();
|
|
SkipWhitespace (0);
|
|
}
|
|
if (IsSym (Ident)) {
|
|
/* Eat the identifier */
|
|
SB_AppendChar (Target, IsMacro (Ident) ? '1' : '0');
|
|
if (HaveParen) {
|
|
SkipWhitespace (0);
|
|
if (CurC != ')') {
|
|
PPError ("')' expected");
|
|
ClearLine ();
|
|
} else {
|
|
NextChar ();
|
|
}
|
|
}
|
|
} else {
|
|
PPError ("Macro name must be an identifier");
|
|
ClearLine ();
|
|
SB_AppendChar (Target, '0');
|
|
}
|
|
} else {
|
|
/* Check if it's an expandable macro */
|
|
Macro* M = FindMacro (Ident);
|
|
if (M != 0 && !M->Expanding) {
|
|
/* Check if this is a function-like macro */
|
|
if (M->ArgCount >= 0) {
|
|
int MultiLine = (ModeFlags & MSM_MULTILINE) != 0;
|
|
int Whitespace = SkipWhitespace (MultiLine);
|
|
if (CurC != '(') {
|
|
/* Function-like macro without an argument list is not replaced */
|
|
SB_AppendStr (Target, M->Name);
|
|
if (Whitespace > 0) {
|
|
SB_AppendChar (Target, ' ');
|
|
}
|
|
|
|
/* Directives can only be found in an argument list
|
|
** that spans multiple lines.
|
|
*/
|
|
if (MultiLine) {
|
|
if (CurC == '#') {
|
|
/* If we were going to support #pragma in
|
|
** macro argument list, it would be output
|
|
** to OLine.
|
|
*/
|
|
if (OLine == 0) {
|
|
OLine = Target;
|
|
ParseDirectives (ModeFlags);
|
|
OLine = 0;
|
|
} else {
|
|
ParseDirectives (ModeFlags);
|
|
}
|
|
}
|
|
/* Add the source info to preprocessor output if needed */
|
|
AddPreLine (Target);
|
|
}
|
|
} else {
|
|
/* Function-like macro */
|
|
if (OLine == 0) {
|
|
OLine = Target;
|
|
ExpandMacro (Target, M, MultiLine);
|
|
OLine = 0;
|
|
} else {
|
|
ExpandMacro (Target, M, MultiLine);
|
|
}
|
|
}
|
|
} else {
|
|
/* Object-like macro */
|
|
ExpandMacro (Target, M, 0);
|
|
}
|
|
} else {
|
|
/* An identifier, keep it */
|
|
SB_AppendStr (Target, Ident);
|
|
}
|
|
}
|
|
} else {
|
|
if ((ModeFlags & MSM_TOK_HEADER) != 0 && (CurC == '<' || CurC == '\"')) {
|
|
CopyHeaderNameToken (Target);
|
|
} else if (IsQuote (CurC)) {
|
|
CopyQuotedString (Target);
|
|
} else {
|
|
int Whitespace = SkipWhitespace (0);
|
|
if (Whitespace) {
|
|
SB_AppendChar (Target, ' ');
|
|
} else {
|
|
SB_AppendChar (Target, CurC);
|
|
NextChar ();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Drop whitespace at the end */
|
|
if (IsBlank (SB_LookAtLast (Target))) {
|
|
SB_Drop (Target, 1);
|
|
}
|
|
|
|
/* Switch back the input */
|
|
InitLine (OldSource);
|
|
}
|
|
|
|
|
|
|
|
/*****************************************************************************/
|
|
/* Directives */
|
|
/*****************************************************************************/
|
|
|
|
|
|
|
|
static void DoDefine (void)
|
|
/* Process #define directive */
|
|
{
|
|
ident Ident;
|
|
Macro* M;
|
|
Macro* Existing;
|
|
int C89;
|
|
unsigned Len;
|
|
|
|
/* Read the macro name */
|
|
SkipWhitespace (0);
|
|
if (!MacName (Ident)) {
|
|
return;
|
|
}
|
|
|
|
/* Remember if we're in C89 mode */
|
|
C89 = (IS_Get (&Standard) == STD_C89);
|
|
|
|
/* Check for forbidden macro names */
|
|
if (strcmp (Ident, "defined") == 0) {
|
|
PPError ("'%s' cannot be used as a macro name", Ident);
|
|
return;
|
|
}
|
|
|
|
/* Create a new macro definition */
|
|
M = NewMacro (Ident);
|
|
|
|
/* Check if this is a function like macro */
|
|
if (CurC == '(') {
|
|
|
|
/* Skip the left paren */
|
|
NextChar ();
|
|
|
|
/* Set the marker that this is a function like macro */
|
|
M->ArgCount = 0;
|
|
|
|
/* Read the formal parameter list */
|
|
while (1) {
|
|
|
|
/* Skip white space and check for end of parameter list */
|
|
SkipWhitespace (0);
|
|
if (CurC == ')') {
|
|
break;
|
|
}
|
|
|
|
/* The next token must be either an identifier, or - if not in
|
|
** C89 mode - the ellipsis.
|
|
*/
|
|
if (!C89 && CurC == '.') {
|
|
/* Ellipsis */
|
|
NextChar ();
|
|
if (CurC != '.' || NextC != '.') {
|
|
PPError ("'...' expected");
|
|
ClearLine ();
|
|
FreeMacro (M);
|
|
return;
|
|
}
|
|
NextChar ();
|
|
NextChar ();
|
|
|
|
/* Remember that the macro is variadic and use __VA_ARGS__ as
|
|
** the argument name.
|
|
*/
|
|
AddMacroArg (M, "__VA_ARGS__");
|
|
M->Variadic = 1;
|
|
|
|
} else {
|
|
/* Must be macro argument name */
|
|
if (MacName (Ident) == 0) {
|
|
return;
|
|
}
|
|
|
|
/* __VA_ARGS__ is only allowed in post-C89 mode */
|
|
if (!C89 && strcmp (Ident, "__VA_ARGS__") == 0) {
|
|
PPWarning ("'__VA_ARGS__' can only appear in the expansion "
|
|
"of a C99 variadic macro");
|
|
}
|
|
|
|
/* Add the macro argument */
|
|
AddMacroArg (M, Ident);
|
|
}
|
|
|
|
/* If we had an ellipsis, or the next char is not a comma, we've
|
|
** reached the end of the macro argument list.
|
|
*/
|
|
SkipWhitespace (0);
|
|
if (M->Variadic || CurC != ',') {
|
|
break;
|
|
}
|
|
NextChar ();
|
|
}
|
|
|
|
/* Check for a right paren and eat it if we find one */
|
|
if (CurC != ')') {
|
|
PPError ("')' expected for macro definition");
|
|
ClearLine ();
|
|
FreeMacro (M);
|
|
return;
|
|
}
|
|
NextChar ();
|
|
}
|
|
|
|
/* Skip whitespace before the macro replacement */
|
|
SkipWhitespace (0);
|
|
|
|
/* Remove whitespace and comments from the line, store the preprocessed
|
|
** line into the macro replacement buffer.
|
|
*/
|
|
TranslationPhase3 (Line, &M->Replacement);
|
|
|
|
/* Remove whitespace from the end of the line */
|
|
while (IsSpace (SB_LookAtLast (&M->Replacement))) {
|
|
SB_Drop (&M->Replacement, 1);
|
|
}
|
|
#if 0
|
|
printf ("%s: <%.*s>\n", M->Name, SB_GetLen (&M->Replacement), SB_GetConstBuf (&M->Replacement));
|
|
#endif
|
|
|
|
/* Check for ## at start or end */
|
|
Len = SB_GetLen (&M->Replacement);
|
|
if (Len >= 2) {
|
|
if (SB_LookAt (&M->Replacement, 0) == '#' &&
|
|
SB_LookAt (&M->Replacement, 1) == '#') {
|
|
/* Diagnose and bail out */
|
|
PPError ("'##' cannot appear at start of macro expansion");
|
|
FreeMacro (M);
|
|
return;
|
|
} else if (SB_LookAt (&M->Replacement, Len - 1) == '#' &&
|
|
SB_LookAt (&M->Replacement, Len - 2) == '#') {
|
|
/* Diagnose and bail out */
|
|
PPError ("'##' cannot appear at end of macro expansion");
|
|
FreeMacro (M);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* Get an existing macro definition with this name */
|
|
Existing = FindMacro (M->Name);
|
|
|
|
/* If we have an existing macro, check if the redefinition is identical.
|
|
** Print a diagnostic if not.
|
|
*/
|
|
if (Existing != 0) {
|
|
if (MacroCmp (M, Existing) != 0) {
|
|
PPError ("Macro redefinition is not identical");
|
|
}
|
|
/* Undefine the existing macro anyways */
|
|
UndefineMacro (Existing->Name);
|
|
}
|
|
|
|
/* Insert the new macro into the macro table */
|
|
InsertMacro (M);
|
|
}
|
|
|
|
|
|
|
|
static int PushIf (int Skip, int Invert, int Cond)
|
|
/* Push a new if level onto the if stack */
|
|
{
|
|
/* Check for an overflow of the if stack */
|
|
if (PPStack->Index >= MAX_PP_IFS-1) {
|
|
PPError ("Too many nested #if clauses");
|
|
return 1;
|
|
}
|
|
|
|
/* Push the #if condition */
|
|
++PPStack->Index;
|
|
if (Skip) {
|
|
PPStack->Stack[PPStack->Index] = IFCOND_SKIP | IFCOND_NEEDTERM;
|
|
return 1;
|
|
} else {
|
|
PPStack->Stack[PPStack->Index] = IFCOND_NONE | IFCOND_NEEDTERM;
|
|
return (Invert ^ Cond);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
static void DoError (void)
|
|
/* Print an error */
|
|
{
|
|
SkipWhitespace (0);
|
|
if (CurC == '\0') {
|
|
PPError ("#error");
|
|
} else {
|
|
StrBuf MsgLine = AUTO_STRBUF_INITIALIZER;
|
|
TranslationPhase3 (Line, &MsgLine);
|
|
PPError ("#error: %s", SB_GetConstBuf (&MsgLine) + SB_GetIndex (&MsgLine));
|
|
SB_Done (&MsgLine);
|
|
}
|
|
|
|
/* Clear the rest of line */
|
|
ClearLine ();
|
|
}
|
|
|
|
|
|
|
|
static int DoIf (int Skip)
|
|
/* Process #if directive */
|
|
{
|
|
PPExpr Expr = AUTO_PPEXPR_INITIALIZER;
|
|
|
|
if (!Skip) {
|
|
|
|
/* We're about to use a dedicated expression parser to evaluate the #if
|
|
** expression. Save the current tokens to come back here later.
|
|
*/
|
|
Token SavedCurTok = CurTok;
|
|
Token SavedNextTok = NextTok;
|
|
|
|
/* Make sure the line infos for the tokens won't get removed */
|
|
if (SavedCurTok.LI) {
|
|
UseLineInfo (SavedCurTok.LI);
|
|
}
|
|
if (SavedNextTok.LI) {
|
|
UseLineInfo (SavedNextTok.LI);
|
|
}
|
|
|
|
/* Macro-replace a single line with support for the "defined" operator */
|
|
SB_Clear (MLine);
|
|
PreprocessDirective (Line, MLine, MSM_OP_DEFINED);
|
|
|
|
/* Read from the processed line */
|
|
SB_Reset (MLine);
|
|
MLine = InitLine (MLine);
|
|
|
|
/* Add two semicolons as sentinels to the line, so the following
|
|
** expression evaluation will eat these two tokens but nothing from
|
|
** the following line.
|
|
*/
|
|
SB_AppendStr (Line, ";;");
|
|
SB_Terminate (Line);
|
|
|
|
/* Load CurTok and NextTok with tokens from the new input */
|
|
NextToken ();
|
|
NextToken ();
|
|
|
|
/* Call the expression parser */
|
|
ParsePPExprInLine (&Expr);
|
|
|
|
/* Restore input source */
|
|
MLine = InitLine (MLine);
|
|
|
|
/* Reset the old tokens */
|
|
CurTok = SavedCurTok;
|
|
NextTok = SavedNextTok;
|
|
}
|
|
|
|
/* Set the #if condition according to the expression result */
|
|
return PushIf (Skip, 1, Expr.IVal != 0);
|
|
}
|
|
|
|
|
|
|
|
static int DoIfDef (int skip, int flag)
|
|
/* Process #ifdef if flag == 1, or #ifndef if flag == 0. */
|
|
{
|
|
int Value = 0;
|
|
|
|
if (!skip) {
|
|
ident Ident;
|
|
|
|
SkipWhitespace (0);
|
|
if (MacName (Ident)) {
|
|
Value = IsMacro (Ident);
|
|
/* Check for extra tokens */
|
|
CheckExtraTokens (flag ? "ifdef" : "ifndef");
|
|
}
|
|
}
|
|
|
|
return PushIf (skip, flag, Value);
|
|
}
|
|
|
|
|
|
|
|
static void DoInclude (void)
|
|
/* Open an include file. */
|
|
{
|
|
char RTerm;
|
|
InputType IT;
|
|
StrBuf Filename = AUTO_STRBUF_INITIALIZER;
|
|
|
|
/* Macro-replace a single line with special support for <filename> */
|
|
SB_Clear (MLine);
|
|
PreprocessDirective (Line, MLine, MSM_TOK_HEADER);
|
|
|
|
/* Read from the processed line */
|
|
SB_Reset (MLine);
|
|
MLine = InitLine (MLine);
|
|
|
|
/* Get the next char and check for a valid file name terminator. Setup
|
|
** the include directory spec (SYS/USR) by looking at the terminator.
|
|
*/
|
|
switch (CurC) {
|
|
|
|
case '\"':
|
|
RTerm = '\"';
|
|
IT = IT_USRINC;
|
|
break;
|
|
|
|
case '<':
|
|
RTerm = '>';
|
|
IT = IT_SYSINC;
|
|
break;
|
|
|
|
default:
|
|
PPError ("#include expects \"FILENAME\" or <FILENAME>");
|
|
goto Done;
|
|
}
|
|
NextChar ();
|
|
|
|
/* Get a copy of the filename */
|
|
while (CurC != '\0' && CurC != RTerm) {
|
|
SB_AppendChar (&Filename, CurC);
|
|
NextChar ();
|
|
}
|
|
SB_Terminate (&Filename);
|
|
|
|
/* Check if we got a terminator */
|
|
if (CurC == RTerm) {
|
|
/* Skip the terminator */
|
|
NextChar ();
|
|
/* Check for extra tokens following the filename */
|
|
CheckExtraTokens ("include");
|
|
/* Open the include file */
|
|
OpenIncludeFile (SB_GetConstBuf (&Filename), IT);
|
|
} else {
|
|
/* No terminator found */
|
|
PPError ("#include expects \"FILENAME\" or <FILENAME>");
|
|
}
|
|
|
|
Done:
|
|
/* Free the allocated filename data */
|
|
SB_Done (&Filename);
|
|
|
|
/* Restore input source */
|
|
MLine = InitLine (MLine);
|
|
|
|
/* Clear the remaining line so the next input will come from the new
|
|
** file (if open)
|
|
*/
|
|
ClearLine ();
|
|
}
|
|
|
|
|
|
|
|
static unsigned GetLineDirectiveNum (void)
|
|
/* Get a decimal digit-sequence from the input. Return 0 on errors. */
|
|
{
|
|
unsigned long Num = 0;
|
|
StrBuf Buf = AUTO_STRBUF_INITIALIZER;
|
|
|
|
/* The only non-decimal-numeric character allowed in the digit-sequence is
|
|
** the digit separator '\'' as of C23, but we haven't supported it yet.
|
|
*/
|
|
SkipWhitespace (0);
|
|
while (IsDigit (CurC))
|
|
{
|
|
SB_AppendChar (&Buf, CurC);
|
|
NextChar ();
|
|
}
|
|
|
|
/* Ensure the buffer is terminated with a '\0' */
|
|
SB_Terminate (&Buf);
|
|
if (SkipWhitespace (0) != 0 || CurC == '\0') {
|
|
const char* Str = SB_GetConstBuf (&Buf);
|
|
if (Str[0] == '\0') {
|
|
PPWarning ("#line directive interprets number as decimal, not octal");
|
|
} else {
|
|
Num = strtoul (Str, 0, 10);
|
|
if (Num > 2147483647) {
|
|
PPError ("#line directive requires an integer argument not greater than 2147483647");
|
|
ClearLine ();
|
|
Num = 0;
|
|
} else if (Num == 0) {
|
|
PPError ("#line directive requires a positive integer argument");
|
|
ClearLine ();
|
|
}
|
|
}
|
|
} else {
|
|
PPError ("#line directive requires a simple decimal digit sequence");
|
|
ClearLine ();
|
|
}
|
|
|
|
/* Done with the buffer */
|
|
SB_Done (&Buf);
|
|
|
|
return (unsigned)Num;
|
|
}
|
|
|
|
|
|
|
|
static void DoLine (void)
|
|
/* Process #line directive */
|
|
{
|
|
unsigned LineNum;
|
|
|
|
/* Macro-replace a single line with support for the "defined" operator */
|
|
SB_Clear (MLine);
|
|
PreprocessDirective (Line, MLine, MSM_NONE);
|
|
|
|
/* Read from the processed line */
|
|
SB_Reset (MLine);
|
|
MLine = InitLine (MLine);
|
|
|
|
/* Parse and check the specified line number */
|
|
LineNum = GetLineDirectiveNum ();
|
|
if (LineNum != 0) {
|
|
/* Parse and check the optional filename argument */
|
|
if (SB_GetIndex (Line) < SB_GetLen (Line)) {
|
|
StrBuf Filename = AUTO_STRBUF_INITIALIZER;
|
|
if (SB_GetString (Line, &Filename)) {
|
|
SB_Terminate (&Filename);
|
|
SetCurrentFilename (SB_GetConstBuf (&Filename));
|
|
} else {
|
|
PPError ("Invalid filename for #line directive");
|
|
LineNum = 0;
|
|
}
|
|
SB_Done (&Filename);
|
|
}
|
|
|
|
/* #line actually sets the line number of the next line */
|
|
if (LineNum > 0) {
|
|
SetCurrentLine (LineNum - 1);
|
|
/* Check for extra tokens at the end */
|
|
CheckExtraTokens ("line");
|
|
}
|
|
}
|
|
|
|
/* Restore input source */
|
|
MLine = InitLine (MLine);
|
|
}
|
|
|
|
|
|
|
|
static void DoPragma (void)
|
|
/* Handle a #pragma line by converting the #pragma preprocessor directive into
|
|
** the _Pragma() compiler operator.
|
|
*/
|
|
{
|
|
StrBuf* PragmaLine = OLine;
|
|
|
|
PRECONDITION (PragmaLine != 0);
|
|
|
|
/* Add the source info to preprocessor output if needed */
|
|
AddPreLine (PragmaLine);
|
|
|
|
/* Macro-replace a single line */
|
|
SB_Clear (MLine);
|
|
PreprocessDirective (Line, MLine, MSM_NONE);
|
|
|
|
/* Convert #pragma to _Pragma () */
|
|
SB_AppendStr (PragmaLine, "_Pragma (");
|
|
SB_Reset (MLine);
|
|
Stringize (MLine, PragmaLine);
|
|
SB_AppendChar (PragmaLine, ')');
|
|
|
|
/* End this line */
|
|
SB_SetIndex (PragmaLine, SB_GetLen (PragmaLine));
|
|
}
|
|
|
|
|
|
|
|
static void DoUndef (void)
|
|
/* Process the #undef directive */
|
|
{
|
|
ident Ident;
|
|
|
|
SkipWhitespace (0);
|
|
if (MacName (Ident)) {
|
|
UndefineMacro (Ident);
|
|
}
|
|
/* Check for extra tokens */
|
|
CheckExtraTokens ("undef");
|
|
}
|
|
|
|
|
|
|
|
static void DoWarning (void)
|
|
/* Print a warning */
|
|
{
|
|
SkipWhitespace (0);
|
|
if (CurC == '\0') {
|
|
PPWarning ("#warning");
|
|
} else {
|
|
StrBuf MsgLine = AUTO_STRBUF_INITIALIZER;
|
|
TranslationPhase3 (Line, &MsgLine);
|
|
PPWarning ("#warning: %s", SB_GetConstBuf (&MsgLine) + SB_GetIndex (&MsgLine));
|
|
SB_Done (&MsgLine);
|
|
}
|
|
|
|
/* Clear the rest of line */
|
|
ClearLine ();
|
|
}
|
|
|
|
|
|
|
|
static int ParseDirectives (unsigned ModeFlags)
|
|
/* Handle directives. Return 1 if any whitespace or newlines are parsed. */
|
|
{
|
|
int PPSkip = 0;
|
|
ident Directive;
|
|
|
|
/* Skip white space at the beginning of the first line */
|
|
int Whitespace = SkipWhitespace (0);
|
|
|
|
/* Check for stuff to skip */
|
|
while (CurC == '\0' || CurC == '#' || PPSkip) {
|
|
|
|
/* Check for preprocessor lines lines */
|
|
if (CurC == '#') {
|
|
NextChar ();
|
|
SkipWhitespace (0);
|
|
if (CurC == '\0') {
|
|
/* Ignore the empty preprocessor directive */
|
|
continue;
|
|
}
|
|
if (!IsSym (Directive)) {
|
|
if (!PPSkip) {
|
|
PPError ("Preprocessor directive expected");
|
|
}
|
|
ClearLine ();
|
|
} else {
|
|
switch (FindPPDirectiveType (Directive)) {
|
|
|
|
case PPD_DEFINE:
|
|
if (!PPSkip) {
|
|
DoDefine ();
|
|
}
|
|
break;
|
|
|
|
case PPD_ELIF:
|
|
if (PPStack->Index >= 0) {
|
|
if ((PPStack->Stack[PPStack->Index] & IFCOND_ELSE) == 0) {
|
|
/* Handle as #else/#if combination */
|
|
if ((PPStack->Stack[PPStack->Index] & IFCOND_SKIP) == 0) {
|
|
PPSkip = !PPSkip;
|
|
}
|
|
PPStack->Stack[PPStack->Index] |= IFCOND_ELSE;
|
|
PPSkip = DoIf (PPSkip);
|
|
|
|
/* #elif doesn't need a terminator */
|
|
PPStack->Stack[PPStack->Index] &= ~IFCOND_NEEDTERM;
|
|
} else {
|
|
PPError ("Duplicate #else/#elif");
|
|
}
|
|
} else {
|
|
PPError ("Unexpected #elif");
|
|
}
|
|
break;
|
|
|
|
case PPD_ELSE:
|
|
if (PPStack->Index >= 0) {
|
|
if ((PPStack->Stack[PPStack->Index] & IFCOND_ELSE) == 0) {
|
|
if ((PPStack->Stack[PPStack->Index] & IFCOND_SKIP) == 0) {
|
|
PPSkip = !PPSkip;
|
|
}
|
|
PPStack->Stack[PPStack->Index] |= IFCOND_ELSE;
|
|
|
|
/* Check for extra tokens */
|
|
CheckExtraTokens ("else");
|
|
} else {
|
|
PPError ("Duplicate #else");
|
|
}
|
|
} else {
|
|
PPError ("Unexpected '#else'");
|
|
}
|
|
break;
|
|
|
|
case PPD_ENDIF:
|
|
if (PPStack->Index >= 0) {
|
|
/* Remove any clauses on top of stack that do not
|
|
** need a terminating #endif.
|
|
*/
|
|
while (PPStack->Index >= 0 &&
|
|
(PPStack->Stack[PPStack->Index] & IFCOND_NEEDTERM) == 0) {
|
|
--PPStack->Index;
|
|
}
|
|
|
|
/* Stack may not be empty here or something is wrong */
|
|
CHECK (PPStack->Index >= 0);
|
|
|
|
/* Remove the clause that needs a terminator */
|
|
PPSkip = (PPStack->Stack[PPStack->Index--] & IFCOND_SKIP) != 0;
|
|
|
|
/* Check for extra tokens */
|
|
CheckExtraTokens ("endif");
|
|
} else {
|
|
PPError ("Unexpected '#endif'");
|
|
}
|
|
break;
|
|
|
|
case PPD_ERROR:
|
|
if (!PPSkip) {
|
|
DoError ();
|
|
}
|
|
break;
|
|
|
|
case PPD_IF:
|
|
PPSkip = DoIf (PPSkip);
|
|
break;
|
|
|
|
case PPD_IFDEF:
|
|
PPSkip = DoIfDef (PPSkip, 1);
|
|
break;
|
|
|
|
case PPD_IFNDEF:
|
|
PPSkip = DoIfDef (PPSkip, 0);
|
|
break;
|
|
|
|
case PPD_INCLUDE:
|
|
if (!PPSkip) {
|
|
DoInclude ();
|
|
}
|
|
break;
|
|
|
|
case PPD_LINE:
|
|
if (!PPSkip) {
|
|
DoLine ();
|
|
}
|
|
break;
|
|
|
|
case PPD_PRAGMA:
|
|
if (!PPSkip) {
|
|
if ((ModeFlags & MSM_IN_ARG_LIST) == 0) {
|
|
DoPragma ();
|
|
} else {
|
|
PPError ("Embedded #pragma directive within macro arguments is unsupported");
|
|
}
|
|
}
|
|
break;
|
|
|
|
case PPD_UNDEF:
|
|
if (!PPSkip) {
|
|
DoUndef ();
|
|
}
|
|
break;
|
|
|
|
case PPD_WARNING:
|
|
/* #warning is a non standard extension */
|
|
if (IS_Get (&Standard) > STD_C99) {
|
|
if (!PPSkip) {
|
|
DoWarning ();
|
|
}
|
|
} else {
|
|
if (!PPSkip) {
|
|
PPError ("Preprocessor directive expected");
|
|
}
|
|
ClearLine ();
|
|
}
|
|
break;
|
|
|
|
default:
|
|
if (!PPSkip) {
|
|
PPError ("Preprocessor directive expected");
|
|
}
|
|
ClearLine ();
|
|
}
|
|
}
|
|
|
|
}
|
|
if (NextLine () == 0) {
|
|
break;
|
|
}
|
|
++PendingNewLines;
|
|
Whitespace = SkipWhitespace (0) || Whitespace;
|
|
}
|
|
|
|
return Whitespace != 0;
|
|
}
|
|
|
|
|
|
|
|
void HandleSpecialMacro (Macro* M, const char* Name)
|
|
/* Handle special "magic" macros that may change */
|
|
{
|
|
if (strcmp (Name, "__COUNTER__") == 0) {
|
|
/* Replace __COUNTER__ with the current counter number */
|
|
if (IS_Get (&Standard) < STD_CC65) {
|
|
PPWarning ("__COUNTER__ is a cc65 extension");
|
|
}
|
|
SB_Printf (&M->Replacement, "%u", GetCurrentCounter ());
|
|
} else if (strcmp (Name, "__LINE__") == 0) {
|
|
/* Replace __LINE__ with the current line number */
|
|
SB_Printf (&M->Replacement, "%u", GetCurrentLine ());
|
|
} else if (strcmp (Name, "__FILE__") == 0) {
|
|
/* Replace __FILE__ with the current filename */
|
|
StrBuf B = AUTO_STRBUF_INITIALIZER;
|
|
SB_InitFromString (&B, GetCurrentFile ());
|
|
SB_Clear (&M->Replacement);
|
|
Stringize (&B, &M->Replacement);
|
|
SB_Done (&B);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/*****************************************************************************/
|
|
/* Preprocessing */
|
|
/*****************************************************************************/
|
|
|
|
|
|
|
|
static void TranslationPhase3 (StrBuf* Source, StrBuf* Target)
|
|
/* Mimic Translation Phase 3. Handle old and new style comments. Collapse
|
|
** non-newline whitespace sequences.
|
|
*/
|
|
{
|
|
/* Switch to the new input source */
|
|
StrBuf* OldSource = InitLine (Source);
|
|
|
|
/* Loop removing ws and comments */
|
|
while (CurC != '\0') {
|
|
int HasWhiteSpace = 0;
|
|
while (1) {
|
|
/* Squeeze runs of blanks */
|
|
if (IsSpace (CurC)) {
|
|
NextChar ();
|
|
HasWhiteSpace = 1;
|
|
} else if (CurC == '/' && NextC == '*') {
|
|
OldStyleComment ();
|
|
HasWhiteSpace = 1;
|
|
} else if (CurC == '/' && NextC == '/') {
|
|
NewStyleComment ();
|
|
HasWhiteSpace = 1;
|
|
} else {
|
|
/* No more white space */
|
|
break;
|
|
}
|
|
}
|
|
if (HasWhiteSpace) {
|
|
SB_AppendChar (Target, ' ');
|
|
} else if (IsQuote (CurC)) {
|
|
CopyQuotedString (Target);
|
|
} else {
|
|
SB_AppendChar (Target, CurC);
|
|
NextChar ();
|
|
}
|
|
}
|
|
|
|
/* Terminate the new input line */
|
|
SB_Terminate (Target);
|
|
|
|
/* Switch back to the old source */
|
|
InitLine (OldSource);
|
|
}
|
|
|
|
|
|
|
|
static void PreprocessDirective (StrBuf* Source, StrBuf* Target, unsigned ModeFlags)
|
|
/* Preprocess a single line. Handle specified tokens and operators, remove
|
|
** whitespace and comments, then do macro replacement.
|
|
*/
|
|
{
|
|
int OldIndex = SB_GetIndex (Source);
|
|
MacroExp E;
|
|
|
|
SkipWhitespace (0);
|
|
InitMacroExp (&E);
|
|
MacroReplacement (Source, Target, ModeFlags | MSM_IN_DIRECTIVE);
|
|
DoneMacroExp (&E);
|
|
|
|
/* Restore the source input index */
|
|
SB_SetIndex (Source, OldIndex);
|
|
}
|
|
|
|
|
|
|
|
void Preprocess (void)
|
|
/* Preprocess lines count of which is affected by directives */
|
|
{
|
|
SB_Clear (PLine);
|
|
|
|
/* Add the source info to preprocessor output if needed */
|
|
AddPreLine (PLine);
|
|
|
|
/* Parse any directives */
|
|
OLine = PLine;
|
|
ParseDirectives (MSM_MULTILINE);
|
|
OLine = 0;
|
|
|
|
/* Add the source info to preprocessor output if needed */
|
|
AddPreLine (PLine);
|
|
|
|
/* Add leading whitespace to prettify preprocessor output */
|
|
AppendIndent (PLine, SB_GetIndex (Line));
|
|
|
|
/* Expand macros if any */
|
|
MacroReplacement (Line, PLine, MSM_MULTILINE);
|
|
|
|
/* Add the source info to preprocessor output if needed */
|
|
AddPreLine (PLine);
|
|
|
|
/* Read from the new line */
|
|
SB_Reset (PLine);
|
|
PLine = InitLine (PLine);
|
|
|
|
if (Verbosity > 1 && SB_NotEmpty (Line)) {
|
|
printf ("%s:%u: %.*s\n", GetCurrentFile (), GetCurrentLine (),
|
|
(int) SB_GetLen (Line), SB_GetConstBuf (Line));
|
|
}
|
|
|
|
/* Free all undefined macros */
|
|
FreeUndefinedMacros ();
|
|
}
|
|
|
|
|
|
|
|
void InitPreprocess (void)
|
|
/* Init preprocessor */
|
|
{
|
|
/* Create the output buffers */
|
|
MLine = NewStrBuf ();
|
|
PLine = NewStrBuf ();
|
|
}
|
|
|
|
|
|
|
|
void DonePreprocess (void)
|
|
/* Done with preprocessor */
|
|
{
|
|
/* Done with the output buffers */
|
|
SB_Done (MLine);
|
|
SB_Done (PLine);
|
|
}
|
|
|
|
|
|
|
|
void SetPPIfStack (PPIfStack* Stack)
|
|
/* Specify which PP #if stack to use */
|
|
{
|
|
PPStack = Stack;
|
|
}
|
|
|
|
|
|
|
|
void PreprocessBegin (void)
|
|
/* Initialize preprocessor with current file */
|
|
{
|
|
/* Reset #if depth */
|
|
PPStack->Index = -1;
|
|
|
|
/* Remember to update source file location in preprocess-only mode */
|
|
FileChanged = 1;
|
|
|
|
/* Enable diagnostics on new style comments in C89 mode */
|
|
AllowNewComments = 0;
|
|
}
|
|
|
|
|
|
|
|
void PreprocessEnd (void)
|
|
/* Preprocessor done with current file */
|
|
{
|
|
/* Check for missing #endif */
|
|
while (PPStack->Index >= 0) {
|
|
if ((PPStack->Stack[PPStack->Index] & IFCOND_NEEDTERM) != 0) {
|
|
PPError ("#endif expected");
|
|
}
|
|
--PPStack->Index;
|
|
}
|
|
|
|
/* Remember to update source file location in preprocess-only mode */
|
|
FileChanged = 1;
|
|
}
|