jdk8-mips64-public/hotspot: src/share/vm/adlc/filebuff.cpp@710a3c8b516e (annotated)

src/share/vm/adlc/filebuff.cpp@710a3c8b516e (annotated)

src/share/vm/adlc/filebuff.cpp

Tue, 08 Aug 2017 15:57:29 +0800

author: aoqi
date: Tue, 08 Aug 2017 15:57:29 +0800
changeset 6876: 710a3c8b516e
parent 2314: f95d63e2154a
parent 0: f90c822e73f8
child 9852: 70aa912cebe5
permissions: -rw-r--r--

merge

 /*
  * 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;
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/adlc/filebuff.cpp@710a3c8b516e (annotated)

src/share/vm/adlc/filebuff.cpp