mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-01 06:35:42 +00:00
526 lines
13 KiB
C++
526 lines
13 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: set ts=8 sts=4 et sw=4 tw=99:
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* JavaScript Debugging support - Source Text functions
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*/
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#include <ctype.h>
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#include "jsd.h"
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#include "jsprf.h"
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#ifdef DEBUG
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void JSD_ASSERT_VALID_SOURCE_TEXT(JSDSourceText* jsdsrc)
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{
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JS_ASSERT(jsdsrc);
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JS_ASSERT(jsdsrc->url);
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}
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#endif
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/***************************************************************************/
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/* XXX add notification */
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static void
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_clearText(JSDContext* jsdc, JSDSourceText* jsdsrc)
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{
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if( jsdsrc->text )
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free(jsdsrc->text);
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jsdsrc->text = nullptr;
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jsdsrc->textLength = 0;
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jsdsrc->textSpace = 0;
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jsdsrc->status = JSD_SOURCE_CLEARED;
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jsdsrc->dirty = true;
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jsdsrc->alterCount = jsdc->sourceAlterCount++ ;
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jsdsrc->doingEval = false;
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}
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static bool
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_appendText(JSDContext* jsdc, JSDSourceText* jsdsrc,
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const char* text, size_t length)
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{
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#define MEMBUF_GROW 1000
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unsigned neededSize = jsdsrc->textLength + length;
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if( neededSize > jsdsrc->textSpace )
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{
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char* newBuf;
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unsigned iNewSize;
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/* if this is the first alloc, the req might be all that's needed*/
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if( ! jsdsrc->textSpace )
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iNewSize = length;
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else
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iNewSize = (neededSize * 5 / 4) + MEMBUF_GROW;
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newBuf = (char*) realloc(jsdsrc->text, iNewSize);
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if( ! newBuf )
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{
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/* try again with the minimal size really asked for */
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iNewSize = neededSize;
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newBuf = (char*) realloc(jsdsrc->text, iNewSize);
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if( ! newBuf )
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{
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/* out of memory */
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_clearText( jsdc, jsdsrc );
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jsdsrc->status = JSD_SOURCE_FAILED;
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return false;
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}
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}
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jsdsrc->text = newBuf;
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jsdsrc->textSpace = iNewSize;
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}
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memcpy(jsdsrc->text + jsdsrc->textLength, text, length);
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jsdsrc->textLength += length;
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return true;
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}
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static JSDSourceText*
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_newSource(JSDContext* jsdc, char* url)
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{
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JSDSourceText* jsdsrc = (JSDSourceText*)calloc(1,sizeof(JSDSourceText));
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if( ! jsdsrc )
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return nullptr;
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jsdsrc->url = url;
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jsdsrc->status = JSD_SOURCE_INITED;
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jsdsrc->dirty = true;
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jsdsrc->alterCount = jsdc->sourceAlterCount++ ;
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return jsdsrc;
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}
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static void
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_destroySource(JSDContext* jsdc, JSDSourceText* jsdsrc)
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{
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JS_ASSERT(nullptr == jsdsrc->text); /* must _clearText() first */
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free(jsdsrc->url);
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free(jsdsrc);
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}
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static void
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_removeSource(JSDContext* jsdc, JSDSourceText* jsdsrc)
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{
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JS_REMOVE_LINK(&jsdsrc->links);
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_clearText(jsdc, jsdsrc);
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_destroySource(jsdc, jsdsrc);
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}
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static JSDSourceText*
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_addSource(JSDContext* jsdc, char* url)
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{
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JSDSourceText* jsdsrc = _newSource(jsdc, url);
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if( ! jsdsrc )
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return nullptr;
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JS_INSERT_LINK(&jsdsrc->links, &jsdc->sources);
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return jsdsrc;
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}
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static void
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_moveSourceToRemovedList(JSDContext* jsdc, JSDSourceText* jsdsrc)
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{
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_clearText(jsdc, jsdsrc);
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JS_REMOVE_LINK(&jsdsrc->links);
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JS_INSERT_LINK(&jsdsrc->links, &jsdc->removedSources);
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}
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static void
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_removeSourceFromRemovedList( JSDContext* jsdc, JSDSourceText* jsdsrc )
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{
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JS_REMOVE_LINK(&jsdsrc->links);
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_destroySource( jsdc, jsdsrc );
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}
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static bool
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_isSourceInSourceList(JSDContext* jsdc, JSDSourceText* jsdsrcToFind)
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{
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JSDSourceText *jsdsrc;
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for( jsdsrc = (JSDSourceText*)jsdc->sources.next;
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jsdsrc != (JSDSourceText*)&jsdc->sources;
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jsdsrc = (JSDSourceText*)jsdsrc->links.next )
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{
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if( jsdsrc == jsdsrcToFind )
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return true;
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}
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return false;
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}
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/* compare strings in a case insensitive manner with a length limit
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*/
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static int
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strncasecomp (const char* one, const char * two, int n)
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{
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const char *pA;
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const char *pB;
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for(pA=one, pB=two;; pA++, pB++)
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{
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int tmp;
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if (pA == one+n)
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return 0;
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if (!(*pA && *pB))
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return *pA - *pB;
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tmp = tolower(*pA) - tolower(*pB);
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if (tmp)
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return tmp;
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}
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}
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static const char file_url_prefix[] = "file:";
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#define FILE_URL_PREFIX_LEN (sizeof file_url_prefix - 1)
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char*
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jsd_BuildNormalizedURL( const char* url_string )
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{
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char *new_url_string;
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if( ! url_string )
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return nullptr;
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if (!strncasecomp(url_string, file_url_prefix, FILE_URL_PREFIX_LEN) &&
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url_string[FILE_URL_PREFIX_LEN + 0] == '/' &&
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url_string[FILE_URL_PREFIX_LEN + 1] == '/') {
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new_url_string = JS_smprintf("%s%s",
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file_url_prefix,
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url_string + FILE_URL_PREFIX_LEN + 2);
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} else {
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new_url_string = strdup(url_string);
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}
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return new_url_string;
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}
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/***************************************************************************/
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void
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jsd_DestroyAllSources( JSDContext* jsdc )
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{
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JSDSourceText *jsdsrc;
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JSDSourceText *next;
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for( jsdsrc = (JSDSourceText*)jsdc->sources.next;
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jsdsrc != (JSDSourceText*)&jsdc->sources;
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jsdsrc = next )
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{
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next = (JSDSourceText*)jsdsrc->links.next;
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_removeSource( jsdc, jsdsrc );
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}
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for( jsdsrc = (JSDSourceText*)jsdc->removedSources.next;
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jsdsrc != (JSDSourceText*)&jsdc->removedSources;
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jsdsrc = next )
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{
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next = (JSDSourceText*)jsdsrc->links.next;
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_removeSourceFromRemovedList( jsdc, jsdsrc );
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}
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}
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JSDSourceText*
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jsd_IterateSources(JSDContext* jsdc, JSDSourceText **iterp)
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{
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JSDSourceText *jsdsrc = *iterp;
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if( !jsdsrc )
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jsdsrc = (JSDSourceText *)jsdc->sources.next;
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if( jsdsrc == (JSDSourceText *)&jsdc->sources )
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return nullptr;
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*iterp = (JSDSourceText *)jsdsrc->links.next;
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return jsdsrc;
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}
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JSDSourceText*
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jsd_FindSourceForURL(JSDContext* jsdc, const char* url)
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{
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JSDSourceText *jsdsrc;
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for( jsdsrc = (JSDSourceText *)jsdc->sources.next;
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jsdsrc != (JSDSourceText *)&jsdc->sources;
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jsdsrc = (JSDSourceText *)jsdsrc->links.next )
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{
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if( 0 == strcmp(jsdsrc->url, url) )
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return jsdsrc;
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}
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return nullptr;
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}
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const char*
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jsd_GetSourceURL(JSDContext* jsdc, JSDSourceText* jsdsrc)
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{
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return jsdsrc->url;
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}
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bool
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jsd_GetSourceText(JSDContext* jsdc, JSDSourceText* jsdsrc,
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const char** ppBuf, int* pLen )
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{
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*ppBuf = jsdsrc->text;
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*pLen = jsdsrc->textLength;
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return true;
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}
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void
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jsd_ClearSourceText(JSDContext* jsdc, JSDSourceText* jsdsrc)
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{
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if( JSD_SOURCE_INITED != jsdsrc->status &&
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JSD_SOURCE_PARTIAL != jsdsrc->status )
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{
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_clearText(jsdc, jsdsrc);
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}
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}
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JSDSourceStatus
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jsd_GetSourceStatus(JSDContext* jsdc, JSDSourceText* jsdsrc)
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{
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return jsdsrc->status;
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}
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bool
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jsd_IsSourceDirty(JSDContext* jsdc, JSDSourceText* jsdsrc)
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{
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return jsdsrc->dirty;
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}
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void
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jsd_SetSourceDirty(JSDContext* jsdc, JSDSourceText* jsdsrc, bool dirty)
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{
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jsdsrc->dirty = dirty;
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}
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unsigned
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jsd_GetSourceAlterCount(JSDContext* jsdc, JSDSourceText* jsdsrc)
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{
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return jsdsrc->alterCount;
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}
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unsigned
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jsd_IncrementSourceAlterCount(JSDContext* jsdc, JSDSourceText* jsdsrc)
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{
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return jsdsrc->alterCount = jsdc->sourceAlterCount++;
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}
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/***************************************************************************/
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#if defined(DEBUG) && 0
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void DEBUG_ITERATE_SOURCES( JSDContext* jsdc )
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{
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JSDSourceText* iterp = nullptr;
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JSDSourceText* jsdsrc = nullptr;
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int dummy;
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while( nullptr != (jsdsrc = jsd_IterateSources(jsdc, &iterp)) )
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{
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const char* url;
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const char* text;
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int len;
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bool dirty;
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JSDStreamStatus status;
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bool gotSrc;
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url = JSD_GetSourceURL(jsdc, jsdsrc);
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dirty = JSD_IsSourceDirty(jsdc, jsdsrc);
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status = JSD_GetSourceStatus(jsdc, jsdsrc);
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gotSrc = JSD_GetSourceText(jsdc, jsdsrc, &text, &len );
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dummy = 0; /* gives us a line to set breakpoint... */
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}
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}
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#else
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#define DEBUG_ITERATE_SOURCES(x) ((void)x)
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#endif
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/***************************************************************************/
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JSDSourceText*
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jsd_NewSourceText(JSDContext* jsdc, const char* url)
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{
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JSDSourceText* jsdsrc;
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char* new_url_string;
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JSD_LOCK_SOURCE_TEXT(jsdc);
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new_url_string = jsd_BuildNormalizedURL(url);
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if( ! new_url_string )
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return nullptr;
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jsdsrc = jsd_FindSourceForURL(jsdc, new_url_string);
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if( jsdsrc )
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{
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if( jsdsrc->doingEval )
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{
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free(new_url_string);
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JSD_UNLOCK_SOURCE_TEXT(jsdc);
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return nullptr;
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}
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else
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_moveSourceToRemovedList(jsdc, jsdsrc);
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}
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jsdsrc = _addSource( jsdc, new_url_string );
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JSD_UNLOCK_SOURCE_TEXT(jsdc);
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return jsdsrc;
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}
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JSDSourceText*
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jsd_AppendSourceText(JSDContext* jsdc,
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JSDSourceText* jsdsrc,
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const char* text, /* *not* zero terminated */
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size_t length,
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JSDSourceStatus status)
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{
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JSD_LOCK_SOURCE_TEXT(jsdc);
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if( jsdsrc->doingEval )
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{
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JSD_UNLOCK_SOURCE_TEXT(jsdc);
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return nullptr;
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}
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if( ! _isSourceInSourceList( jsdc, jsdsrc ) )
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{
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_removeSourceFromRemovedList( jsdc, jsdsrc );
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JSD_UNLOCK_SOURCE_TEXT(jsdc);
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return nullptr;
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}
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if( text && length && ! _appendText( jsdc, jsdsrc, text, length ) )
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{
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jsdsrc->dirty = true;
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jsdsrc->alterCount = jsdc->sourceAlterCount++ ;
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jsdsrc->status = JSD_SOURCE_FAILED;
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_moveSourceToRemovedList(jsdc, jsdsrc);
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JSD_UNLOCK_SOURCE_TEXT(jsdc);
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return nullptr;
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}
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jsdsrc->dirty = true;
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jsdsrc->alterCount = jsdc->sourceAlterCount++ ;
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jsdsrc->status = status;
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DEBUG_ITERATE_SOURCES(jsdc);
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JSD_UNLOCK_SOURCE_TEXT(jsdc);
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return jsdsrc;
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}
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JSDSourceText*
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jsd_AppendUCSourceText(JSDContext* jsdc,
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JSDSourceText* jsdsrc,
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const jschar* text, /* *not* zero terminated */
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size_t length,
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JSDSourceStatus status)
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{
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#define UNICODE_TRUNCATE_BUF_SIZE 1024
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static char* buf = nullptr;
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int remaining = length;
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if(!text || !length)
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return jsd_AppendSourceText(jsdc, jsdsrc, nullptr, 0, status);
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JSD_LOCK_SOURCE_TEXT(jsdc);
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if(!buf)
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{
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buf = js_pod_malloc<char>(UNICODE_TRUNCATE_BUF_SIZE);
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if(!buf)
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{
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JSD_UNLOCK_SOURCE_TEXT(jsdc);
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return nullptr;
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}
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}
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while(remaining && jsdsrc) {
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int bytes = (remaining < UNICODE_TRUNCATE_BUF_SIZE) ? remaining : UNICODE_TRUNCATE_BUF_SIZE;
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int i;
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for(i = 0; i < bytes; i++)
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buf[i] = (const char) *(text++);
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jsdsrc = jsd_AppendSourceText(jsdc,jsdsrc,
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buf, bytes,
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JSD_SOURCE_PARTIAL);
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remaining -= bytes;
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}
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if(jsdsrc && status != JSD_SOURCE_PARTIAL)
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jsdsrc = jsd_AppendSourceText(jsdc, jsdsrc, nullptr, 0, status);
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JSD_UNLOCK_SOURCE_TEXT(jsdc);
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return jsdsrc;
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}
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/* convienence function for adding complete source of url in one call */
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bool
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jsd_AddFullSourceText(JSDContext* jsdc,
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const char* text, /* *not* zero terminated */
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size_t length,
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const char* url)
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{
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JSDSourceText* jsdsrc;
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JSD_LOCK_SOURCE_TEXT(jsdc);
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jsdsrc = jsd_NewSourceText(jsdc, url);
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if( jsdsrc )
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jsdsrc = jsd_AppendSourceText(jsdc, jsdsrc,
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text, length, JSD_SOURCE_PARTIAL );
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if( jsdsrc )
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jsdsrc = jsd_AppendSourceText(jsdc, jsdsrc,
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nullptr, 0, JSD_SOURCE_COMPLETED );
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JSD_UNLOCK_SOURCE_TEXT(jsdc);
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return jsdsrc ? true : false;
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}
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/***************************************************************************/
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void
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jsd_StartingEvalUsingFilename(JSDContext* jsdc, const char* url)
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{
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JSDSourceText* jsdsrc;
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/* NOTE: We leave it locked! */
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JSD_LOCK_SOURCE_TEXT(jsdc);
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jsdsrc = jsd_FindSourceForURL(jsdc, url);
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if(jsdsrc)
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{
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#if 0
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#ifndef JSD_LOWLEVEL_SOURCE
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JS_ASSERT(! jsdsrc->doingEval);
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#endif
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#endif
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jsdsrc->doingEval = true;
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}
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}
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void
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jsd_FinishedEvalUsingFilename(JSDContext* jsdc, const char* url)
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{
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JSDSourceText* jsdsrc;
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/* NOTE: We ASSUME it is locked! */
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jsdsrc = jsd_FindSourceForURL(jsdc, url);
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if(jsdsrc)
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{
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#if 0
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#ifndef JSD_LOWLEVEL_SOURCE
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/*
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* when using this low level source addition, this jsdsrc might
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* not have existed before the eval, but does exist now (without
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* this flag set!)
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*/
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JS_ASSERT(jsdsrc->doingEval);
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#endif
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#endif
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jsdsrc->doingEval = false;
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}
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JSD_UNLOCK_SOURCE_TEXT(jsdc);
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}
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