Mercurial > hg > truffle
view src/share/vm/adlc/filebuff.cpp @ 15543:0aa45f53abde
Baseline: re-enable simple loop tests.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Tue, 06 May 2014 11:30:07 +0200 |
parents | f95d63e2154a |
children |
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/* * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ // FILEBUFF.CPP - Routines for handling a parser file buffer #include "adlc.hpp" using namespace std; //------------------------------FileBuff--------------------------------------- // Create a new parsing buffer FileBuff::FileBuff( BufferedFile *fptr, ArchDesc& archDesc) : _fp(fptr), _AD(archDesc) { _err = fseek(_fp->_fp, 0, SEEK_END); // Seek to end of file if (_err) { file_error(SEMERR, 0, "File seek error reading input file"); exit(1); // Exit on seek error } _filepos = ftell(_fp->_fp); // Find offset of end of file _bufferSize = _filepos + 5; // Filepos points to last char, so add padding _err = fseek(_fp->_fp, 0, SEEK_SET); // Reset to beginning of file if (_err) { file_error(SEMERR, 0, "File seek error reading input file\n"); exit(1); // Exit on seek error } _filepos = ftell(_fp->_fp); // Reset current file position _linenum = 0; _bigbuf = new char[_bufferSize]; // Create buffer to hold text for parser if( !_bigbuf ) { file_error(SEMERR, 0, "Buffer allocation failed\n"); exit(1); // Exit on allocation failure } *_bigbuf = '\n'; // Lead with a sentinel newline _buf = _bigbuf+1; // Skip sentinel _bufmax = _buf; // Buffer is empty _bufeol = _bigbuf; // _bufeol points at sentinel _filepos = -1; // filepos is in sync with _bufeol _bufoff = _offset = 0L; // Offset at file start _bufmax += fread(_buf, 1, _bufferSize-2, _fp->_fp); // Fill buffer & set end value if (_bufmax == _buf) { file_error(SEMERR, 0, "File read error, no input read\n"); exit(1); // Exit on read error } *_bufmax = '\n'; // End with a sentinel new-line *(_bufmax+1) = '\0'; // Then end with a sentinel NULL } //------------------------------~FileBuff-------------------------------------- // Nuke the FileBuff FileBuff::~FileBuff() { delete _bigbuf; } //------------------------------get_line---------------------------------------- char *FileBuff::get_line(void) { char *retval; // Check for end of file & return NULL if (_bufeol >= _bufmax) return NULL; _linenum++; retval = ++_bufeol; // return character following end of previous line if (*retval == '\0') return NULL; // Check for EOF sentinel // Search for newline character which must end each line for(_filepos++; *_bufeol != '\n'; _bufeol++) _filepos++; // keep filepos in sync with _bufeol // _bufeol & filepos point at end of current line, so return pointer to start return retval; } //------------------------------FileBuffRegion--------------------------------- // Create a new region in a FileBuff. FileBuffRegion::FileBuffRegion( FileBuff* bufr, int soln, int ln, int off, int len) : _bfr(bufr), _sol(soln), _line(ln), _offset(off), _length(len) { _next = NULL; // No chained regions } //------------------------------~FileBuffRegion-------------------------------- // Delete the entire linked list of buffer regions. FileBuffRegion::~FileBuffRegion() { if( _next ) delete _next; } //------------------------------copy------------------------------------------- // Deep copy a FileBuffRegion FileBuffRegion *FileBuffRegion::copy() { if( !this ) return NULL; // The empty buffer region FileBuffRegion *br = new FileBuffRegion(_bfr,_sol,_line,_offset,_length); if( _next ) br->_next = _next->copy(); return br; } //------------------------------merge------------------------------------------ // Merge another buffer region into this buffer region. Make overlapping areas // become a single region. Remove (delete) the input FileBuffRegion. // Since the buffer regions are sorted by file offset, this is a varient of a // "sorted-merge" running in linear time. FileBuffRegion *FileBuffRegion::merge( FileBuffRegion *br ) { if( !br ) return this; // Merging nothing if( !this ) return br; // Merging into nothing assert( _bfr == br->_bfr, "" ); // Check for pointer-equivalent buffers if( _offset < br->_offset ) { // "this" starts before "br" if( _offset+_length < br->_offset ) { // "this" ends before "br" if( _next ) _next->merge( br ); // Merge with remainder of list else _next = br; // No more in this list; just append. } else { // Regions overlap. int l = br->_offset + br->_length - _offset; if( l > _length ) _length = l; // Pick larger region FileBuffRegion *nr = br->_next; // Get rest of region br->_next = NULL; // Remove indication of rest of region delete br; // Delete this region (it's been subsumed). if( nr ) merge( nr ); // Merge with rest of region } // End of if regions overlap or not. } else { // "this" starts after "br" if( br->_offset+br->_length < _offset ) { // "br" ends before "this" FileBuffRegion *nr = new FileBuffRegion(_bfr,_sol,_line,_offset,_length); nr->_next = _next; // Structure copy "this" guy to "nr" *this = *br; // Structure copy "br" over "this". br->_next = NULL; // Remove indication of rest of region delete br; // Delete this region (it's been copied) merge( nr ); // Finish merging } else { // Regions overlap. int l = _offset + _length - br->_offset; if( l > _length ) _length = l; // Pick larger region _offset = br->_offset; // Start with earlier region _sol = br->_sol; // Also use earlier line start _line = br->_line; // Also use earlier line FileBuffRegion *nr = br->_next; // Get rest of region br->_next = NULL; // Remove indication of rest of region delete br; // Delete this region (it's been subsumed). if( nr ) merge( nr ); // Merge with rest of region } // End of if regions overlap or not. } return this; } //------------------------------expandtab-------------------------------------- static int expandtab( ostream &os, int off, char c, char fill1, char fill2 ) { if( c == '\t' ) { // Tab? do os << fill1; // Expand the tab; Output space while( (++off) & 7 ); // Expand to tab stop } else { // Normal character os << fill2; // Display normal character off++; // Increment "cursor" offset } return off; } //------------------------------printline-------------------------------------- // Print and highlite a region of a line. Return the amount of highliting left // to do (i.e. highlite length minus length of line). static int printline( ostream& os, const char *fname, int line, const char *_sol, int skip, int len ) { // Display the entire tab-expanded line os << fname << ":" << line << ": "; const char *t = strchr(_sol,'\n')+1; // End of line int off = 0; // Cursor offset for tab expansion const char *s = _sol; // Nice string pointer while( t-s ) { // Display whole line char c = *s++; // Get next character to display off = expandtab(os,off,c,' ',c); } // Display the tab-expanded skippings before underlining. os << fname << ":" << line << ": "; off = 0; // Cursor offset for tab expansion s = _sol; // Restart string pointer // Start underlining. if( skip != -1 ) { // The no-start-indicating flag const char *u = _sol+skip; // Amount to skip while( u-s ) // Display skipped part off = expandtab(os,off,*s++,' ',' '); os << '^'; // Start region off++; // Moved cursor len--; // 1 less char to do if( *s++ == '\t' ) // Starting character is a tab? off = expandtab(os,off,'\t','-','^'); } // Long region doesn't end on this line int llen = (int)(t-s); // Length of line, minus what's already done if( len > llen ) { // Doing entire rest of line? while( t-s ) // Display rest of line off = expandtab(os,off,*s++,'-','-'); os << '\n'; // EOL return len-llen; // Return what's not yet done. } // Region does end on this line. This code fails subtly if the region ends // in a tab character. int i; for( i=1; i<len; i++ ) // Underline just what's needed off = expandtab(os,off,*s++,'-','-'); if( i == len ) os << '^'; // Mark end of region os << '\n'; // End of marked line return 0; // All done } //------------------------------print------------------------------------------ //std::ostream& operator<< ( std::ostream& os, FileBuffRegion &br ) { ostream& operator<< ( ostream& os, FileBuffRegion &br ) { if( &br == NULL ) return os; // The empty buffer region FileBuffRegion *brp = &br; // Pointer to region while( brp ) { // While have chained regions brp->print(os); // Print region brp = brp->_next; // Chain to next } return os; // Return final stream } //------------------------------print------------------------------------------ // Print the FileBuffRegion to a stream. FileBuffRegions are printed with the // filename and line number to the left, and complete text lines to the right. // Selected portions (portions of a line actually in the FileBuffRegion are // underlined. Ellipses are used for long multi-line regions. //void FileBuffRegion::print( std::ostream& os ) { void FileBuffRegion::print( ostream& os ) { if( !this ) return; // Nothing to print char *s = _bfr->get_line(); int skip = (int)(_offset - _sol); // Amount to skip to start of data int len = printline( os, _bfr->_fp->_name, _line, s, skip, _length ); if( !len ) return; // All done; exit // Here we require at least 2 lines int off1 = _length - len + skip; // Length of line 1 int off2 = off1 + _sol; // Offset to start of line 2 char *s2 = _bfr->get_line(); // Start of line 2 char *s3 = strchr( s2, '\n' )+1; // Start of line 3 (unread) if( len <= (s3-s2) ) { // It all fits on the next line printline( os, _bfr->_fp->_name, _line+1, s2, -1, len ); // Print&underline return; } // Here we require at least 3 lines int off3 = off2 + (int)(s3-s2); // Offset to start of line 3 s3 = _bfr->get_line(); // Start of line 3 (read) const char *s4 = strchr( s3, '\n' )+1;// Start of line 4 (unread) if( len < (s4-s3) ) { // It all fits on the next 2 lines s2 = _bfr->get_line(); len = printline( os, _bfr->_fp->_name, _line+1, s2, -1, len ); // Line 2 s3 = _bfr->get_line(); printline( os, _bfr->_fp->_name, _line+2, s3, -1, len ); // Line 3 return; } // Here we require at least 4 lines. // Print only the 1st and last line, with ellipses in middle. os << "...\n"; // The ellipses int cline = _line+1; // Skipped 2 lines do { // Do until find last line len -= (int)(s3-s2); // Remove length of line cline++; // Next line s2 = _bfr->get_line(); // Get next line from end of this line s3 = strchr( s2, '\n' ) + 1;// Get end of next line } while( len > (s3-s2) ); // Repeat until last line printline( os, _bfr->_fp->_name, cline, s2, -1, len ); // Print & underline } //------------------------------file_error------------------------------------- void FileBuff::file_error(int flag, int linenum, const char *fmt, ...) { va_list args; va_start(args, fmt); switch (flag) { case 0: _AD._warnings += _AD.emit_msg(0, flag, linenum, fmt, args); case 1: _AD._syntax_errs += _AD.emit_msg(0, flag, linenum, fmt, args); case 2: _AD._semantic_errs += _AD.emit_msg(0, flag, linenum, fmt, args); default: assert(0, ""); break; } va_end(args); _AD._no_output = 1; }