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gecko-dev/lib/libparse/pa_mdl.c

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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#include "pa_parse.h"
#include <stdio.h>
#include "pa_tags.h"
#include "libmocha.h" /* For JavaScript conditional HTML comments */
#ifdef PROFILE
#pragma profile on
#endif
#define NAME_LIST_INC 5 /* step to increase tag name/value arrays by */
static char *pa_token_to_name[] = {
#include "pa_hash.rmap"
};
/*************
* Used by layout/laytags.c if MOCHA_CACHES_WRITES is defined.
**************/
const char *
pa_PrintTagToken(int32 token)
{
if ((uint32)token >= P_MAX)
{
return "UNKNOWN";
}
return pa_token_to_name[token];
}
/*************************************
* Function: pa_CloneMDLTag
*
* Description: This function allocates and fills in an entire
* PA_Tag structure for any MDL tag element type.
*
* Params: The tag to clone
*
* Returns: A pointer to a completely filled in PA_Tag structure
* that is a clone of the tag passed in. On failure it
* returns NULL.
*************************************/
PA_Tag *
PA_CloneMDLTag(PA_Tag * src)
{
PA_Tag *tag;
PA_Block buff;
char *locked_buff, *src_buff;
/*
* Allocate a new tag structure, return NULL
* if you can't.
*/
tag = XP_NEW(PA_Tag);
if (tag == NULL)
{
return(NULL);
}
tag->type = src->type;
tag->is_end = src->is_end;
tag->newline_count = src->newline_count;
tag->data_len = src->data_len;
tag->true_len = src->true_len;
tag->lo_data = NULL;
tag->next = NULL;
/* sure wish we could just do a strdup() here */
buff = PA_ALLOC((tag->data_len + 1) * sizeof(char));
if (buff != NULL)
{
PA_LOCK(locked_buff, char *, buff);
PA_LOCK(src_buff, char *, src->data);
XP_BCOPY(src_buff, locked_buff, tag->data_len);
locked_buff[tag->data_len] = '\0';
PA_UNLOCK(locked_buff);
PA_UNLOCK(src_buff);
}
else
{
XP_DELETE(tag);
return(NULL);
}
tag->data = buff;
return(tag);
}
/*************************************
* Function: pa_CreateMDLTag
*
* Description: This function allocates and fills in an entire
* PA_Tag structure for any MDL tag element type.
*
* Params: Takes a buffer containing a complete tag element string,
* and a length for that buffer. The buffer is NOT a \0
* terminated string.
*
* Returns: A pointer to a completely filled in PA_Tag structure
* created based on the data contained in the passed
* tag element string. On failure it returns NULL.
*************************************/
PA_Tag *
pa_CreateMDLTag(pa_DocData *doc_data, char *buf, int32 len)
{
PA_Tag *tag;
char *start;
char *tptr;
char tchar;
int32 cnt;
PA_Block buff;
char *locked_buff;
int32 blen;
/*
* Allocate a new tag structure, return NULL
* if you can't.
*/
tag = XP_NEW(PA_Tag);
if (tag == NULL)
{
return(NULL);
}
tag->lo_data = NULL;
tag->newline_count = doc_data->newline_count;
/*
* Find the start of the tag element text
*/
tptr = buf;
tptr++; /* skip the '<' */
cnt = 1;
/*
* Check if this is an end tag
*/
if (*tptr == '/')
{
tag->is_end = TRUE;
tptr++;
cnt++;
}
else
{
tag->is_end = FALSE;
}
start = tptr;
/*
* Find the end of the tag element text
*/
while ((*tptr != '>')&&(!XP_IS_SPACE(*tptr)))
{
tptr++;
cnt++;
/*
* Reach the end of the tag but find no end
*/
if (cnt == len)
{
XP_DELETE(tag);
return(NULL);
}
}
/*
* Temporarily null ternimate the string to do
* the string compares.
*/
tchar = *tptr;
*tptr = '\0';
tag->type = pa_tokenize_tag(start);
*tptr = tchar;
/*
* For UNKNOWN tags, stick the tag name in the
* paramater list as a boolean.
* This is in case a later module wants to try and interpret it.
*/
if (tag->type == P_UNKNOWN)
{
tptr = start;
}
/*
* Allocate a buffer for the parameter list and
* put it in the tag structure.
*/
blen = (len - (int)(tptr - buf));
buff = PA_ALLOC((blen+1) * sizeof (char)); /* LAM no need to use handles here */
/* BAD_OOM_HANDLING should return NULL tag*/
if (buff != NULL)
{
PA_LOCK(locked_buff, char *, buff);
XP_BCOPY(tptr, locked_buff, blen);
locked_buff[blen] = '\0';
PA_UNLOCK(buff);
}
else
{
blen = 0;
}
tag->data = buff;
tag->data_len = blen;
tag->true_len = len;
tag->next = NULL;
tag->edit_element = NULL;
return(tag);
}
/*************************************
* Function: pa_CreateTextTag
*
* Description: This function allocates and fills in an entire
* PA_Tag structure for a P_TEXT tag element.
* P_TEXT is a special tag, where the text passed
* is simply shoved into the first value field
* of the values array.
*
* Params: Takes a buffer containing a text string,
* and a length for that buffer. The buffer is NOT a \0
* terminated string.
*
* Returns: A pointer to a completely filled in PA_Tag structure
* of type P_TEXT containing the text passed in.
* On failure it returns NULL.
*************************************/
PA_Tag *
pa_CreateTextTag(pa_DocData *doc_data, char *buf, int32 len)
{
PA_Tag *tag;
PA_Block buff;
char *locked_buff;
/*
* Allocate a new tag structure, return NULL
* if you can't.
*/
tag = XP_NEW(PA_Tag);
if (tag == NULL)
{
return(NULL);
}
tag->lo_data = NULL;
tag->type = P_TEXT;
tag->is_end = FALSE;
tag->newline_count = doc_data->newline_count;
buff = PA_ALLOC((len + 1) * sizeof(char));
if (buff != NULL)
{
PA_LOCK(locked_buff, char *, buff);
XP_BCOPY(buf, locked_buff, len);
locked_buff[len] = '\0';
PA_UNLOCK(buff);
}
else
{
XP_DELETE(tag);
return(NULL);
}
tag->data = buff;
tag->data_len = len;
tag->true_len = len;
tag->next = NULL;
tag->edit_element = NULL;
return(tag);
}
static PRBool
pa_eval_javascript_expression(pa_DocData *doc_data,
char *expression,
PRBool *return_value)
{
char *eval_str;
/* If JS is not enabled, assume expression evaluates to true */
if (LM_GetMochaEnabled() == FALSE) {
*return_value = PR_TRUE;
return PR_TRUE;
}
if (!LM_AttemptLockJS(doc_data->window_id, NULL, NULL)) {
doc_data->waiting_for_js_thread = PR_TRUE;
return PR_FALSE;
}
doc_data->waiting_for_js_thread = PR_FALSE;
eval_str = LM_EvaluateAttribute(doc_data->window_id, expression,
doc_data->newline_count + 1);
*return_value = eval_str && !XP_STRCMP(eval_str, "true");
if (eval_str)
XP_FREE(eval_str);
LM_UnlockJS(doc_data->window_id);
return PR_TRUE;
}
static PRBool
pa_could_be_javascript_entity(char *entity, int len)
{
if (len == 0)
return PR_TRUE;
if (len == 1)
return (entity[0] == '&');
return (entity[1] == '{');
}
static PRBool
pa_is_javascript_entity(char *entity, int len)
{
return ((len >=2) && pa_could_be_javascript_entity(entity, len));
}
static char *
pa_isolate_javascript_expression(char *entity, int len, char **terminatorp)
{
char *tptr;
/* Skip over &{ */
tptr = entity + 2;
len -= 2;
while (len >= 2)
{
if ((*tptr == '}') && (*(tptr + 1) == ';')) {
*tptr = '\0';
*terminatorp = tptr;
return entity + 2;
}
tptr++;
len--;
}
return NULL;
}
/* This function is used only to evaluate JavaScript entities used to form
conditional comments. Other JS entities are handled within layout.
Returns PR_TRUE if the JS entity could be evaluated, or PR_FALSE
if it could not be because the JS thread was busy. In the latter case,
we'll have to try again later. */
static PRBool
pa_try_eval_javascript_entity(pa_DocData *doc_data, char *entity, int len, PRBool *retval)
{
char *expr, *terminator_char;
PRBool success;
if (!pa_is_javascript_entity(entity, len))
return PR_FALSE;
expr = pa_isolate_javascript_expression(entity, len, &terminator_char);
if (!expr)
return PR_FALSE;
success = pa_eval_javascript_expression(doc_data, expr, retval);
/* Eliminate null-termination performed by pa_eval_javascript_expression()*/
if (!success)
*terminator_char = '}';
return success;
}
/*************************************
* Function: pa_FindMDLTag
*
* Description: This function finds the start of any MDL tags
* in the passed buffer. It also finds MDL comments
* and flags partial MDL tags and partial comments.
*
* Params: Takes a buffer and a length for that buffer. The buffer is NOT
* a \0 terminated string. It also takes a pointer to an
* int in which to store special return codes.
*
* Returns: A character pointer. This is NULL if the entire string has
* no MDL tags. It is a pointer to the beginning of any such
* tags or possible partial tags if any are found.
*************************************/
char *
pa_FindMDLTag(pa_DocData *doc_data, char *buf, int32 len, intn *is_comment)
{
char *tptr;
*is_comment = COMMENT_NO;
/*
* A NULL buffer obviously has no MDL tags.
*/
if (buf == NULL)
{
return(NULL);
}
for (tptr = buf; --len >= 0; tptr++)
{
if (*tptr == '\n' || (*tptr == '\r' && len && *(tptr+1) != '\n') )
{
if (doc_data->no_newline_count == 0)
doc_data->newline_count++;
continue;
}
/*
* A '<' might be the start of a MDL tag or comment.
*/
if (*tptr == '<')
{
/*
* If this is the last character in the string
* we don't know if it is an anchor yet or not.
* we want to save it until the next buffer to make
* sure.
*/
if (len == 0)
{
*is_comment = COMMENT_MAYBE;
return(tptr);
}
/*
* else if the next character is a letter or
* a '/' , this should be some kind of tag.
*/
else if ((XP_IS_ALPHA(*(tptr + 1)))||
(*(tptr + 1) == '/'))
{
return(tptr);
}
/*
* else is the next character is an exclamation point,
* this might be a comment.
*/
else if (*(tptr + 1) == '!')
{
char *ptr;
ptr = (char *)(tptr + 1);
/*
* If there are 2 more chars in this buffer
* we can know for sure if this is a comment,
* otherwise we have to wait for the next
* buffer.
*/
if (len > 2)
{
if ((*(ptr + 1) == '-')&&
(*(ptr + 2) == '-'))
{
/* Check for a javascript entity immediately after the opening
of the comment. This indicates the presence of a conditional
comment. */
if (pa_could_be_javascript_entity(ptr + 3, len - 3) &&
(doc_data->brute_tag == P_UNKNOWN))
{
PRBool js_result;
if (pa_try_eval_javascript_entity(doc_data, ptr + 3,
len - 3, &js_result))
{
if (js_result)
*is_comment = COMMENT_UNCOMMENT;
else
*is_comment = COMMENT_YES;
} else {
/* Unable to evaluate. Try again later */
*is_comment = COMMENT_MAYBE;
}
}
else
{
*is_comment = COMMENT_YES;
}
return(tptr);
}
/*
* Else we may have an HTML++ tag
* which we will become an UNKNOWN
* tag type.
*/
/*
* So many people do broken stuff, anything
* That starts <! and is not a comment I will assume
* is a tag
else if ((XP_IS_ALPHA(*(ptr + 1)))||
(*(ptr + 1) == '/'))
*/
{
return(tptr);
}
}
else
{
*is_comment = COMMENT_MAYBE;
return(tptr);
}
}
/*
* else if the next character is a question mark
* this might be a 'processing instruction'.
* We treat processing instructions just like
* comments and ignore their content.
*/
else if (*(tptr + 1) == '?')
{
*is_comment = COMMENT_PROCESS;
return(tptr);
}
}
}
return(NULL);
}
/*************************************
* Function: pa_FindMDLEndTag
*
* Description: This function finds the end of a MDL tag in the
* passed buffer.
*
* Params: Takes a buffer and a length for that buffer. The buffer is NOT
* a \0 terminated string.
*
* Returns: A character pointer. This is NULL if the string has
* no end to the MDL tag. It is a pointer to the end of
* the tag if any is found.
*************************************/
char *
pa_FindMDLEndTag(pa_DocData *doc_data, char *buf, int32 len)
{
char *tptr;
uint8 in_quote; /* 0 = none,
1 = single quote,
2 = double quote,
3 = back quote */
uint newlines;
/*
* There can be no end to a MDL tag in a NULL buffer.
*/
if (buf == NULL)
{
return(NULL);
}
#ifdef LENIENT_END_TAG
/*
* MDL tags are always ended with a '>', so it is REALLY
* easy to find their end.
*/
for (tptr = buf; --len >= 0; tptr++)
{
if (*tptr == '\n' || (*tptr == '\r' && len && *(tptr+1) != '\n') )
{
if (doc_data->no_newline_count == 0)
doc_data->newline_count++;
continue;
}
if (*tptr == '>')
{
return(tptr);
}
}
#else
/*
* MDL tags are always ended with a '>', but '>' can also
* appear in quoted attribute values, so be careful.
*/
in_quote = 0;
newlines = 0;
for (tptr = buf; --len >= 0; tptr++)
{
if (*tptr == '\n' || (*tptr == '\r' && len && *(tptr+1) != '\n') )
{
newlines++;
continue;
}
if (*tptr == '\"')
{
/*
* If we are not in a double quote already and this
* double quote is immediately after some whitespace
* or an equal sign, it is the start of a quoted
* attribute value, and greater than signs inside
* do not close this tag.
*/
if (in_quote == 0)
{
if ((tptr > buf)&&((*(tptr - 1) == '=')||
(XP_IS_SPACE(*(tptr - 1)))))
{
in_quote = 2;
}
}
/*
* else if we are already in a double quote,
* this double quote closes it.
*/
else if (in_quote == 2)
{
in_quote = 0;
}
}
/*
* Else the same as above except for single quoted values
*/
else if (*tptr == '\'')
{
/*
* If we are not in a single quote already and this
* single quote is immediately after some whitespace
* or an equal sign, it is the start of a quoted
* attribute value, and greater than signs inside
* do not close this tag.
*/
if (in_quote == 0)
{
if ((tptr > buf)&&((*(tptr - 1) == '=')||
(XP_IS_SPACE(*(tptr - 1)))))
{
in_quote = 1;
}
}
/*
* else if we are already in a single quote,
* this single quote closes it.
*/
else if (in_quote == 1)
{
in_quote = 0;
}
}
if (*tptr == '`')
{
/*
* If we are not in a double quote already and this
* double quote is immediately after some whitespace
* or an equal sign, it is the start of a quoted
* attribute value, and greater than signs inside
* do not close this tag.
*/
if (in_quote == 0)
{
if ((tptr > buf)&&((*(tptr - 1) == '=')||
(XP_IS_SPACE(*(tptr - 1)))))
{
in_quote = 3;
}
}
/*
* else if we are already in a double quote,
* this double quote closes it.
*/
else if (in_quote == 3)
{
in_quote = 0;
}
}
else if ((*tptr == '>')&&(in_quote == 0))
{
if (doc_data->no_newline_count == 0)
doc_data->newline_count += newlines;
return(tptr);
}
}
#endif /* LENIENT_END_TAG */
return(NULL);
}
/*************************************
* Function: pa_FindMDLEndComment
*
* Description: This function finds the end of a MDL comment in the
* passed buffer.
*
* Params: Takes a buffer and a length for that buffer. The buffer is NOT
* a \0 terminated string.
*
* Returns: A character pointer. This is NULL if the string has
* no end to the MDL comment. It is a pointer to the end of
* the comment if any is found.
*************************************/
char *
pa_FindMDLEndComment(pa_DocData *doc_data, char *buf, int32 len)
{
char *tptr;
int newline_count = 0;
/*
* There can be no end to a MDL comment in a NULL buffer.
*/
if (buf == NULL)
{
return(NULL);
}
/*
* Finding the end to a comment is kind of complex since
* the comment end sequence is actually 3 characters "-->",
* and there can be other '>' chararacters inside the comment.
*/
for (tptr = buf; --len >= 0; tptr++)
{
if (*tptr == '\n' || (*tptr == '\r' && len && *(tptr+1) != '\n') )
{
newline_count++;
continue;
}
if ((*tptr == '>')&&(tptr - buf) >= 2)
{
if ((*(tptr - 1) == '-')&&(*(tptr - 2) == '-'))
{
if (doc_data->no_newline_count == 0)
doc_data->newline_count += newline_count;
return(tptr);
}
}
}
return(NULL);
}
char *
pa_FindMDLEndProcessInstruction(pa_DocData *doc_data, char *buf, int32 len)
{
char *tptr;
int newline_count = 0;
/*
* There can be no end to a processing instruction in a NULL buffer.
*/
if (buf == NULL)
{
return(NULL);
}
/*
* Finding the end to a processing instruction is kind of complex
* since the end sequence is actually 2 characters "?>",
* and there can be other '>' chararacters inside the
* processing instruction.
*/
for (tptr = buf; --len >= 0; tptr++)
{
if (*tptr == '\n' || (*tptr == '\r' && len && *(tptr+1) != '\n') )
{
newline_count++;
continue;
}
if ((*tptr == '>')&&(tptr - buf) >= 1)
{
if (*(tptr - 1) == '?')
{
if (doc_data->no_newline_count == 0)
doc_data->newline_count += newline_count;
return(tptr);
}
}
}
return(NULL);
}
/*
* A simple test to see if this tag might have attributes.
* Look and see if there are any non-whitespace characters between
* the end of the tag and the closing '>' character.
*/
Bool
PA_TagHasParams(PA_Tag *tag)
{
int32 cnt;
int32 len;
char *buf;
char *tptr;
/*
* Punt on obvious error
*/
if ((tag == NULL)||(tag->data == NULL))
{
return(FALSE);
}
PA_LOCK(buf, char *, tag->data);
len = tag->data_len;
/*
* To simplify enormously, we require that buf[len - 1] is
* the tag element terminating character '>'
*
* If not, punt here.
*/
if (buf[len - 1] != '>')
{
PA_UNLOCK(tag->data);
return(FALSE);
}
/*
* Skip all whitespace starting at the front of the string.
*/
cnt = 0;
tptr = buf;
while ((XP_IS_SPACE(*tptr))&&(cnt < len))
{
cnt++;
tptr++;
}
PA_UNLOCK(tag->data);
/*
* If there is something we didn't skip it might be an attribute.
*/
if (cnt < (len - 1))
{
return(TRUE);
}
return(FALSE);
}
void
PA_FetchRequestedNameValues(PA_Tag *tag, char *namesToFind[], int32 numNamesToFind, char *values[], uint16 win_csid)
{
int32 cnt;
char *buf;
char *param_ptr;
char tchar;
int32 len;
int32 nameNum;
Bool nameFound;
#ifndef LENIENT_END_TAG
char *buf_end;
#endif /* LENIENT_END_TAG */
nameFound = FALSE;
/*
* Punt on obvious error
*/
if ((tag == NULL)||(tag->data == NULL))
return;
PA_LOCK(buf, char *, tag->data);
len = tag->data_len;
/*
* To simplify enormously, we require that buf[len - 1] is
* the tag element terminating character '>'
*
* If not, punt here.
*/
if (buf[len - 1] != '>')
{
PA_UNLOCK(tag->data);
return;
}
#ifndef LENIENT_END_TAG
buf_end = (char *)(buf + len - 1);
#endif /* LENIENT_END_TAG */
while (*buf != '>')
{
char *tptr;
int32 plen;
int32 vlen;
/*
* Skip whitespace before the next possible
* parameter name. If no more parameters, break
* out of the while loop.
*/
/* get char so we don't do so many loads from memory */
tchar = *buf;
while ((XP_IS_SPACE(tchar))&&(tchar != '>'))
{
buf++;
tchar = *buf;
}
if (*buf == '>')
{
break;
}
/*
* Find the end of the parameter name.
*/
tptr = buf;
cnt = 0;
/* get char so we don't do so many loads from memory */
tchar = *tptr;
while ( (!XP_IS_SPACE(tchar)) && (tchar != '=') && (tchar != '>') )
{
tptr++;
tchar = *tptr;
}
cnt = tptr - buf;
/*
* param_ptr points to the start of the name.
* plen is its length.
*/
param_ptr = buf;
plen = cnt;
/*
* Move forward to the '=' which delimits the value
*/
buf = tptr;
while (XP_IS_SPACE(*buf))
{
buf++;
}
/*
* clip out the paramater name
*/
tptr = (char *)(param_ptr + plen);
tchar = *tptr;
*tptr = '\0';
/*
* Look for the name in the list of requested names
*
*/
nameNum = 0;
nameFound = FALSE;
while( nameNum < numNamesToFind )
{
if (pa_TagEqual(namesToFind[nameNum], param_ptr))
{
nameFound = TRUE;
break;
}
nameNum++;
}
/*
* Restore character after parameter name
*/
*tptr = tchar;
/*
* We have a value associated with this name.
*/
if (*buf == '=')
{
uint8 quoted; /* 0=none, 1=single, 2=double */
char *nptr;
char *vend_ptr;
char *tmp_value;
int32 nlen;
/*
* Skip past the '='.
*/
buf++;
/*
* skip any white space between '=' and
* the value.
*/
while (XP_IS_SPACE(*buf))
{
buf++;
}
/*
* Check if this is going to be a quoted
* value string.
*/
quoted = 0;
tptr = buf;
cnt = 0;
if (*buf == '\'')
{
/*
* Skip the quote.
*/
buf++;
tptr = buf;
quoted = 1;
}
if (*buf == '\"')
{
/*
* Skip the quote.
*/
buf++;
tptr = buf;
quoted = 2;
}
if (*buf == '`')
{
/*
* DON'T skip the quote.
*/
tptr = buf+1;
quoted = 3;
}
/*
* extract the end and length of the value string.
*/
if (quoted == 0)
{
/* get char so we don't do so many loads from memory */
tchar = *tptr;
while ((!XP_IS_SPACE(tchar))&&(tchar != '>'))
{
tptr++;
tchar = *tptr;
cnt++;
}
}
else if (quoted == 1)
{
#ifdef LENIENT_END_TAG
/* get char so we don't do so many loads from memory */
tchar = *tptr;
while ((tchar != '\'')&&(tchar != '>'))
{
tptr++;
tchar = *tptr;
cnt++;
}
#else
/*
* Allow '>' inside the quoted value.
*/
while ((*tptr != '\'')&&(tptr != buf_end))
{
tptr++;
cnt++;
}
#endif /* LENIENT_END_TAG */
}
else if (quoted == 2)
{
#ifdef LENIENT_END_TAG
/* get char so we don't do so many loads from memory */
tchar = *tptr;
while ((tchar != '\"')&&(tchar != '>'))
{
tptr++;
tchar = *tptr;
cnt++;
}
#else
/*
* Allow '>' inside the quoted value.
*/
while ((*tptr != '\"')&&(tptr != buf_end))
{
tptr++;
cnt++;
}
#endif /* LENIENT_END_TAG */
}
else if (quoted == 3)
{
/*
* Allow '>' inside the quoted value.
*/
while ((*tptr != '`')&&(tptr != buf_end))
{
tptr++;
cnt++;
}
/* include the end of the back quote when retrieving values. */
if( *tptr == '`' )
{
tptr++;
cnt++;
}
}
if( nameFound == TRUE )
{
/*
* buf is the beginning of the parameter value.
* vlen is its length. tptr is the character
* right after the end of the original end which
* may have been changed by the amperstand
* escapes.
*/
vlen = cnt;
/*
* Find the end of the value and terminate
* the string.
*/
vend_ptr = (char *)(buf + vlen);
tchar = *vend_ptr;
*vend_ptr = '\0';
tmp_value = XP_STRDUP(buf);
/*
* Amperstand escapes are allowed in
* parameter values, expand them now.
* The last parameter should force no
* partial amperstand escapes here.
*/
nptr = pa_ExpandEscapes(tmp_value, vlen, &nlen, TRUE, win_csid);
tmp_value[nlen] = '\0';
/*
* Stuff the value into the list, and restore
* the character afer the value string.
*/
values[nameNum] = tmp_value;
*vend_ptr = tchar;
}
buf = tptr;
if ((quoted == 1)&&(*buf == '\''))
{
buf++;
}
else if ((quoted == 2)&&(*buf == '\"'))
{
buf++;
}
/*
* remove white space trailing the value.
*/
while (XP_IS_SPACE(*buf))
{
buf++;
}
}
/*
* Else a name with no value, just a boolean tag.
* No need to do anything
*/
else
{
}
}
PA_UNLOCK(tag->data);
}
/*************************************
* Function: PA_FetchParamValue
*
* Description: This messy function should take the parameter string
* that was part of the tag element, and turn
* look trhough it for a name that matches the
* parameter name passed in, and return its value.
* It is complicated by
* the fact that a value can be a single unquoted word,
* or a quoted string. Also by the fact that some names
* may have no matching values, and by the fact that there
* can be arbitrary whitespace around the equal sign.
* Unmatching quotes in quoted values are assumed to
* close at the end of the tag element.
*
* Params: Takes a tag element structure containing the parameter string
* and the parameter name to look for.
*
* Returns: A pointer to an allocated buffer containing a copy
* of the value string. Boolean parameters return a value
* of '\0'.
*************************************/
PA_Block
PA_FetchParamValue(PA_Tag *tag, char *param_name, uint16 win_csid)
{
int32 cnt;
char *buf;
#ifndef LENIENT_END_TAG
char *buf_end;
#endif /* LENIENT_END_TAG */
char *param_ptr;
char tchar;
int32 len;
PA_Block buff;
char *locked_buff;
/*
* Punt on obvious error
*/
if ((tag == NULL)||(tag->data == NULL))
{
return(NULL);
}
PA_LOCK(buf, char *, tag->data);
len = tag->data_len;
/*
* To simplify enormously, we require that buf[len - 1] is
* the tag element terminating character '>'
*
* If not, punt here.
*/
if (buf[len - 1] != '>')
{
PA_UNLOCK(tag->data);
return(NULL);
}
#ifndef LENIENT_END_TAG
buf_end = (char *)(buf + len - 1);
#endif /* LENIENT_END_TAG */
while (*buf != '>')
{
char *tptr;
int32 plen;
int32 vlen;
/*
* Skip whitespace before the next possible
* parameter name. If no more parameters, break
* out of the while loop.
*/
while ((XP_IS_SPACE(*buf))&&(*buf != '>'))
{
buf++;
}
if (*buf == '>')
{
break;
}
/*
* Find the end of the parameter name.
*/
tptr = buf;
cnt = 0;
while ((!XP_IS_SPACE(*tptr))&&(*tptr != '=')&&(*tptr != '>'))
{
tptr++;
cnt++;
}
/*
* param_ptr points to the start of the name.
* plen is its length.
*/
param_ptr = buf;
plen = cnt;
/*
* Move forward to the '=' which delimits the value
*/
buf = tptr;
while (XP_IS_SPACE(*buf))
{
buf++;
}
/*
* We have a value associated with this name.
*/
if (*buf == '=')
{
uint8 quoted; /* 0=none, 1=single, 2=double */
char *pptr;
/*
* Skip past the '='.
*/
buf++;
/*
* skip any white space between '=' and
* the value.
*/
while (XP_IS_SPACE(*buf))
{
buf++;
}
/*
* Check if this is going to be a quoted
* value string.
*/
quoted = 0;
tptr = buf;
cnt = 0;
if (*buf == '\"')
{
/*
* Skip the quote.
*/
buf++;
tptr = buf;
quoted = 2;
}
else if (*buf == '\'')
{
/*
* Skip the quote.
*/
buf++;
tptr = buf;
quoted = 1;
}
else if (*buf == '`')
{
/* we want to include the ` as part of the string we return */
tptr = buf+1;
cnt = 1;
quoted = 3;
}
/*
* extract the end and length of the value string.
*/
if (quoted == 0)
{
while ((!XP_IS_SPACE(*tptr))&&(*tptr != '>'))
{
tptr++;
cnt++;
}
}
else if (quoted == 1)
{
#ifdef LENIENT_END_TAG
while ((*tptr != '\'')&&(*tptr != '>'))
{
tptr++;
cnt++;
}
#else
/*
* Allow '>' inside the quoted value.
*/
while ((*tptr != '\'')&&(tptr != buf_end))
{
tptr++;
cnt++;
}
#endif /* LENIENT_END_TAG */
}
else if (quoted == 2)
{
#ifdef LENIENT_END_TAG
while ((*tptr != '\"')&&(*tptr != '>'))
{
tptr++;
cnt++;
}
#else
/*
* Allow '>' inside the quoted value.
*/
while ((*tptr != '\"')&&(tptr != buf_end))
{
tptr++;
cnt++;
}
#endif /* LENIENT_END_TAG */
}
else if (quoted == 3)
{
/*
* Allow '>' inside the quoted value.
*/
while ((*tptr != '`')&&(tptr != buf_end))
{
tptr++;
cnt++;
}
if( *tptr == '`' )
{
tptr++;
cnt++;
}
}
/*
* buf is the beginning of the parameter value.
* vlen is its length. tptr is the character
* right after the end of the original end which
* may have been changed by the amperstand
* escapes.
*/
vlen = cnt;
/*
* clip out the paramater name
*/
pptr = (char *)(param_ptr + plen);
tchar = *pptr;
*pptr = '\0';
/*
* If this parameter name matches, this is
* the right value, make a copy to return.
*/
if (pa_TagEqual(param_name, param_ptr))
{
char *vend_ptr;
/*
* Restore character after parameter name
*/
*pptr = tchar;
/*
* Find the end of the value and terminate
* the string.
*/
vend_ptr = (char *)(buf + vlen);
tchar = *vend_ptr;
*vend_ptr = '\0';
buff = PA_ALLOC((vlen + 1) * sizeof(char));
if (buff != NULL)
{
char *nptr;
int32 nlen;
PA_LOCK(locked_buff, char *, buff);
XP_STRCPY(locked_buff, buf);
/*
* Amperstand escapes are allowed in
* parameter values, expand them now.
* The last parameter should force no
* partial amperstand escapes here.
*/
nptr = pa_ExpandEscapes(locked_buff,
vlen, &nlen, TRUE, win_csid);
locked_buff[nlen] = '\0';
PA_UNLOCK(buff);
}
*vend_ptr = tchar;
PA_UNLOCK(tag->data);
return(buff);
}
*pptr = tchar;
buf = tptr;
if ((quoted == 1)&&(*buf == '\''))
{
buf++;
}
else if ((quoted == 2)&&(*buf == '\"'))
{
buf++;
}
else if ((quoted == 3)&&(*buf == '`'))
{
buf++;
}
/*
* remove white space trailing the value.
*/
while (XP_IS_SPACE(*buf))
{
buf++;
}
}
/*
* Else a name with no value, just a boolean tag.
* For boolean tag set value to '\0' ("").
*/
else
{
/*
* clip out the paramater name
*/
tptr = (char *)(param_ptr + plen);
tchar = *tptr;
*tptr = '\0';
/*
* If this parameter name matches, this is
* a boolean, and return '\0' as its value.
*/
if (pa_TagEqual(param_name, param_ptr))
{
*tptr = tchar;
buff = PA_ALLOC(1 * sizeof(char));
if (buff == NULL)
{
PA_UNLOCK(tag->data);
return(NULL);
}
PA_LOCK(locked_buff, char *, buff);
locked_buff[0] = '\0';
PA_UNLOCK(buff);
PA_UNLOCK(tag->data);
return(buff);
}
*tptr = tchar;
}
}
PA_UNLOCK(tag->data);
return(NULL);
}
int32
PA_FetchAllNameValues(PA_Tag *tag, char ***names, char ***values, uint16 win_csid)
{
int32 cnt;
char *buf;
char *param_ptr;
char tchar;
int32 len;
char **name_list;
char **value_list;
int32 name_size;
int32 name_cnt;
#ifndef LENIENT_END_TAG
char *buf_end;
#endif /* LENIENT_END_TAG */
*names = NULL;
*values = NULL;
/*
* Punt on obvious error
*/
if ((tag == NULL)||(tag->data == NULL))
{
return(0);
}
PA_LOCK(buf, char *, tag->data);
len = tag->data_len;
/*
* To simplify enormously, we require that buf[len - 1] is
* the tag element terminating character '>'
*
* If not, punt here.
*/
if (buf[len - 1] != '>')
{
PA_UNLOCK(tag->data);
return(0);
}
name_list = (char **)XP_ALLOC(NAME_LIST_INC * sizeof(char *));
if (name_list == NULL)
{
PA_UNLOCK(tag->data);
return(0);
}
name_size = NAME_LIST_INC;
name_cnt = 0;
value_list = (char **)XP_ALLOC(NAME_LIST_INC * sizeof(char *));
if (value_list == NULL)
{
XP_FREE(name_list);
PA_UNLOCK(tag->data);
return(0);
}
#ifndef LENIENT_END_TAG
buf_end = (char *)(buf + len - 1);
#endif /* LENIENT_END_TAG */
while (*buf != '>')
{
char *tptr;
int32 plen;
int32 vlen;
/*
* Skip whitespace before the next possible
* parameter name. If no more parameters, break
* out of the while loop.
*/
while ((XP_IS_SPACE(*buf))&&(*buf != '>'))
{
buf++;
}
if (*buf == '>')
{
break;
}
/*
* Find the end of the parameter name.
*/
tptr = buf;
cnt = 0;
while ((!XP_IS_SPACE(*tptr))&&(*tptr != '=')&&(*tptr != '>'))
{
tptr++;
cnt++;
}
/*
* param_ptr points to the start of the name.
* plen is its length.
*/
param_ptr = buf;
plen = cnt;
/*
* Move forward to the '=' which delimits the value
*/
buf = tptr;
while (XP_IS_SPACE(*buf))
{
buf++;
}
/*
* clip out the paramater name
*/
tptr = (char *)(param_ptr + plen);
tchar = *tptr;
*tptr = '\0';
/*
* Stuff the name into the name list, growing
* the name list if needed.
*/
name_list[name_cnt] = XP_STRDUP(param_ptr);
name_cnt++;
if (name_cnt >= name_size)
{
name_list = (char **)XP_REALLOC(name_list,
(name_size + NAME_LIST_INC) * sizeof(char *));
if (name_list == NULL)
{
PA_UNLOCK(tag->data);
return(0);
}
value_list = (char **)XP_REALLOC(value_list,
(name_size + NAME_LIST_INC) * sizeof(char *));
if (value_list == NULL)
{
PA_UNLOCK(tag->data);
return(0);
}
name_size += NAME_LIST_INC;
}
/*
* Restore character after parameter name
*/
*tptr = tchar;
/*
* We have a value associated with this name.
*/
if (*buf == '=')
{
uint8 quoted; /* 0=none, 1=single, 2=double */
char *nptr;
char *vend_ptr;
char *tmp_value;
int32 nlen;
/*
* Skip past the '='.
*/
buf++;
/*
* skip any white space between '=' and
* the value.
*/
while (XP_IS_SPACE(*buf))
{
buf++;
}
/*
* Check if this is going to be a quoted
* value string.
*/
quoted = 0;
tptr = buf;
cnt = 0;
if (*buf == '\'')
{
/*
* Skip the quote.
*/
buf++;
tptr = buf;
quoted = 1;
}
if (*buf == '\"')
{
/*
* Skip the quote.
*/
buf++;
tptr = buf;
quoted = 2;
}
if (*buf == '`')
{
/*
* DON'T skip the quote.
*/
tptr = buf+1;
quoted = 3;
}
/*
* extract the end and length of the value string.
*/
if (quoted == 0)
{
while ((!XP_IS_SPACE(*tptr))&&(*tptr != '>'))
{
tptr++;
cnt++;
}
}
else if (quoted == 1)
{
#ifdef LENIENT_END_TAG
while ((*tptr != '\'')&&(*tptr != '>'))
{
tptr++;
cnt++;
}
#else
/*
* Allow '>' inside the quoted value.
*/
while ((*tptr != '\'')&&(tptr != buf_end))
{
tptr++;
cnt++;
}
#endif /* LENIENT_END_TAG */
}
else if (quoted == 2)
{
#ifdef LENIENT_END_TAG
while ((*tptr != '\"')&&(*tptr != '>'))
{
tptr++;
cnt++;
}
#else
/*
* Allow '>' inside the quoted value.
*/
while ((*tptr != '\"')&&(tptr != buf_end))
{
tptr++;
cnt++;
}
#endif /* LENIENT_END_TAG */
}
else if (quoted == 3)
{
/*
* Allow '>' inside the quoted value.
*/
while ((*tptr != '`')&&(tptr != buf_end))
{
tptr++;
cnt++;
}
/* include the end of the back quote when retrieving values. */
if( *tptr == '`' )
{
tptr++;
cnt++;
}
}
/*
* buf is the beginning of the parameter value.
* vlen is its length. tptr is the character
* right after the end of the original end which
* may have been changed by the amperstand
* escapes.
*/
vlen = cnt;
/*
* Find the end of the value and terminate
* the string.
*/
vend_ptr = (char *)(buf + vlen);
tchar = *vend_ptr;
*vend_ptr = '\0';
tmp_value = XP_STRDUP(buf);
/*
* Amperstand escapes are allowed in
* parameter values, expand them now.
* The last parameter should force no
* partial amperstand escapes here.
*/
nptr = pa_ExpandEscapes(tmp_value, vlen, &nlen, TRUE, win_csid);
tmp_value[nlen] = '\0';
/*
* Stuff the value into the list, and restore
* the character afer the value string.
*/
value_list[name_cnt - 1] = tmp_value;
*vend_ptr = tchar;
buf = tptr;
if ((quoted == 1)&&(*buf == '\''))
{
buf++;
}
else if ((quoted == 2)&&(*buf == '\"'))
{
buf++;
}
/*
* remove white space trailing the value.
*/
while (XP_IS_SPACE(*buf))
{
buf++;
}
}
/*
* Else a name with no value, just a boolean tag.
* For boolean tag set value to NULL.
*/
else
{
value_list[name_cnt - 1] = NULL;;
}
}
PA_UNLOCK(tag->data);
*names = name_list;
*values = value_list;
return(name_cnt);
}
/*************************************
* Function: PA_HasMocha
*
* Description: This messy function should take the parameter string
* that was part of the tag element, and turn
* look trhough it for any mocha attributes
* It is complicated by
* the fact that a value can be a single unquoted word,
* or a quoted string. Also by the fact that some names
* may have no matching values, and by the fact that there
* can be arbitrary whitespace around the equal sign.
* Unmatching quotes in quoted values are assumed to
* close at the end of the tag element.
*
* Params: Takes a tag element structure containing the parameter string
*
* Returns: TRUE if any mocha attributes were found else FALSE
*************************************/
Bool
PA_HasMocha(PA_Tag *tag)
{
int32 cnt;
char *buf;
#ifndef LENIENT_END_TAG
char *buf_end;
#endif /* LENIENT_END_TAG */
char *param_ptr;
char tchar;
int32 len;
PA_Block buff;
char *locked_buff;
/*
* Punt on obvious error
*/
if ((tag == NULL)||(tag->data == NULL))
{
return(FALSE);
}
PA_LOCK(buf, char *, tag->data);
len = tag->data_len;
/*
* To simplify enormously, we require that buf[len - 1] is
* the tag element terminating character '>'
*
* If not, punt here.
*/
if (buf[len - 1] != '>')
{
PA_UNLOCK(tag->data);
return(FALSE);
}
#ifndef LENIENT_END_TAG
buf_end = (char *)(buf + len - 1);
#endif /* LENIENT_END_TAG */
while (*buf != '>')
{
char *tptr;
int32 plen;
int32 vlen;
/*
* Skip whitespace before the next possible
* parameter name. If no more parameters, break
* out of the while loop.
*/
while ((XP_IS_SPACE(*buf))&&(*buf != '>'))
{
buf++;
}
if (*buf == '>')
{
break;
}
/*
* Find the end of the parameter name.
*/
tptr = buf;
cnt = 0;
while ((!XP_IS_SPACE(*tptr))&&(*tptr != '=')&&(*tptr != '>'))
{
tptr++;
cnt++;
}
/*
* param_ptr points to the start of the name.
* plen is its length.
*/
param_ptr = buf;
plen = cnt;
/*
* Move forward to the '=' which delimits the value
*/
buf = tptr;
while (XP_IS_SPACE(*buf))
{
buf++;
}
/*
* We have a value associated with this name.
*/
if (*buf == '=')
{
uint8 quoted; /* 0=none, 1=single, 2=double */
char *pptr;
/*
* Skip past the '='.
*/
buf++;
/*
* skip any white space between '=' and
* the value.
*/
while (XP_IS_SPACE(*buf))
{
buf++;
}
/*
* Check if this is going to be a quoted
* value string.
*/
quoted = 0;
tptr = buf;
cnt = 0;
if (*buf == '\"')
{
/*
* Skip the quote.
*/
buf++;
tptr = buf;
quoted = 2;
}
else if (*buf == '\'')
{
/*
* Skip the quote.
*/
buf++;
tptr = buf;
quoted = 1;
}
else if (*buf == '`')
{
/* we want to include the ` as part of the string we return */
tptr = buf+1;
cnt = 1;
quoted = 3;
}
/*
* extract the end and length of the value string.
*/
if (quoted == 0)
{
while ((!XP_IS_SPACE(*tptr))&&(*tptr != '>'))
{
tptr++;
cnt++;
}
}
else if (quoted == 1)
{
#ifdef LENIENT_END_TAG
while ((*tptr != '\'')&&(*tptr != '>'))
{
tptr++;
cnt++;
}
#else
/*
* Allow '>' inside the quoted value.
*/
while ((*tptr != '\'')&&(tptr != buf_end))
{
tptr++;
cnt++;
}
#endif /* LENIENT_END_TAG */
}
else if (quoted == 2)
{
#ifdef LENIENT_END_TAG
while ((*tptr != '\"')&&(*tptr != '>'))
{
tptr++;
cnt++;
}
#else
/*
* Allow '>' inside the quoted value.
*/
while ((*tptr != '\"')&&(tptr != buf_end))
{
tptr++;
cnt++;
}
#endif /* LENIENT_END_TAG */
}
else if (quoted == 3)
{
/*
* Allow '>' inside the quoted value.
*/
while ((*tptr != '`')&&(tptr != buf_end))
{
tptr++;
cnt++;
}
if( *tptr == '`' )
{
tptr++;
cnt++;
}
}
/*
* buf is the beginning of the parameter value.
* vlen is its length. tptr is the character
* right after the end of the original end which
* may have been changed by the amperstand
* escapes.
*/
vlen = cnt;
/*
* clip out the paramater name
*/
pptr = (char *)(param_ptr + plen);
tchar = *pptr;
*pptr = '\0';
/*
* See if this parameter name is a Mocha attribute name
*/
if (pa_TagEqual(PARAM_NAME, param_ptr) ||
pa_TagEqual(PARAM_ONFOCUS, param_ptr) ||
pa_TagEqual(PARAM_ONBLUR, param_ptr) ||
pa_TagEqual(PARAM_ONCHANGE, param_ptr) ||
pa_TagEqual(PARAM_ONSELECT, param_ptr) ||
pa_TagEqual(PARAM_ONCLICK, param_ptr) ||
pa_TagEqual(PARAM_ONSCROLL, param_ptr) ||
pa_TagEqual(PARAM_ONSUBMIT, param_ptr) ||
pa_TagEqual(PARAM_ONMOUSEOVER, param_ptr) ||
pa_TagEqual(PARAM_ONMOUSEOUT, param_ptr) ||
pa_TagEqual(PARAM_ONRESET, param_ptr) ||
pa_TagEqual(PARAM_ONUNLOAD, param_ptr) ||
pa_TagEqual(PARAM_ONLOAD, param_ptr) ||
pa_TagEqual(PARAM_ONERROR, param_ptr) ||
pa_TagEqual(PARAM_ONABORT, param_ptr) ||
pa_TagEqual(PARAM_ONHELP, param_ptr) ||
pa_TagEqual(PARAM_ONMOUSEDOWN, param_ptr) ||
pa_TagEqual(PARAM_ONMOUSEUP, param_ptr) ||
pa_TagEqual(PARAM_ONDBLCLICK, param_ptr) ||
pa_TagEqual(PARAM_ONKEYDOWN, param_ptr) ||
pa_TagEqual(PARAM_ONKEYUP, param_ptr) ||
pa_TagEqual(PARAM_ONKEYPRESS, param_ptr) ||
pa_TagEqual(PARAM_ONDRAGDROP, param_ptr) ||
pa_TagEqual(PARAM_ONMOVE, param_ptr) ||
pa_TagEqual(PARAM_ONRESIZE, param_ptr))
{
char *vend_ptr;
/*
* Restore character after parameter name
*/
*pptr = tchar;
PA_UNLOCK(tag->data);
return(TRUE);
}
/*
* Wasn't a meaningful attribute, restore character after
* parameter name
*/
*pptr = tchar;
buf = tptr;
if ((quoted == 1)&&(*buf == '\''))
{
buf++;
}
else if ((quoted == 2)&&(*buf == '\"'))
{
buf++;
}
else if ((quoted == 3)&&(*buf == '`'))
{
buf++;
}
/*
* remove white space trailing the value.
*/
while (XP_IS_SPACE(*buf))
{
buf++;
}
}
/*
* Else a name with no value, just a boolean tag.
* For boolean tag set value to '\0' ("").
*/
else
{
/*
* clip out the paramater name
*/
tptr = (char *)(param_ptr + plen);
tchar = *tptr;
*tptr = '\0';
/*
* Are there any other no-value mocha parameters?
*/
if (pa_TagEqual(PARAM_MAYSCRIPT, param_ptr))
{
/*
* Restore the trailing character
*/
*tptr = tchar;
PA_UNLOCK(tag->data);
return(TRUE);
}
/*
* Wasn't useful, restore the trailing character
*/
*tptr = tchar;
}
}
PA_UNLOCK(tag->data);
return(FALSE);
}
#ifdef PROFILE
#pragma profile off
#endif
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