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gecko-dev/js/jsd/jsd_text.cpp

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