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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 1998-2016. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*/
#include "elog_global.h"
#include "elog_format.h"
/*
* The Newline treatment bits of FormatMessage
* This value should suppress all other than hardcoded newlines
*/
#define NL_TREATMENT FORMAT_MESSAGE_MAX_WIDTH_MASK
/*
* Expands %%NNN formats in strings with strings from a
* ParameterMessageFile (open).
* A return of NULL means there's nothing to expand
* or that the buffer is to small, which probably means the
* same thing to the caller, that is use the
* original string as it is.
*/
static char *expand_message(char *toexpand,
HINSTANCE paramlib,
char *buff, int bufflen){
char *oldpos;
int buffpos = 0;
char *pos = toexpand;
char *end;
unsigned long num;
char *replbuff = malloc(bufflen);
char *repl;
int replaced = 0;
while((oldpos = pos, pos = strstr(pos,"%%"))){
num = strtoul(pos + 2, &end, 0);
replaced = 1;
if(end == pos + 2 || num == 0){
repl = "%%";
} else {
if(!FormatMessage(FORMAT_MESSAGE_FROM_HMODULE |
FORMAT_MESSAGE_IGNORE_INSERTS |
NL_TREATMENT,
(LPCVOID) paramlib,
(DWORD) num,
DEFAULT_LANGID,
replbuff,
(DWORD) bufflen,
NULL)){
repl = ""; /* this is how the event logger treats it... */
} else {
repl = replbuff;
}
}
if((int)(buffpos + strlen(repl) + (pos - oldpos) + 1) > bufflen){
free(replbuff);
return NULL;
}
strncpy(&(buff[buffpos]),oldpos, pos - oldpos);
buffpos += pos - oldpos;
strcpy(&(buff[buffpos]), repl);
buffpos += strlen(repl);
pos = end;
}
free(replbuff);
if(!replaced)
return NULL;
if((int) (buffpos + strlen(oldpos) + 1) > bufflen)
return NULL;
strcpy(&(buff[buffpos]),oldpos);
return buff;
}
/*
* A lot to free when returning from format_message, lets make it easier
*/
static char *fm_free_up(char **argv, char *tmpbuff,
char * tmpbuff2,
HINSTANCE elibrary,
HINSTANCE plibrary){
if(plibrary != NULL){
FreeLibrary(plibrary);
while(*argv)
free(*argv++);
}
free(tmpbuff);
free(tmpbuff2);
if(elibrary != NULL)
FreeLibrary(elibrary);
return NULL;
}
#define FM_RETURN(X) \
return (fm_free_up(argv, tmpbuff, tmpbuff2, elibrary, plibrary), (X))
/*
* Formats an eventlog message into a string buffer.
* Returns NULL if message could not be formatted (buffer to small or
* library error).
*/
char *format_message(MessageFiles mf, DWORD id,
char *strings, int numstrings,
char *buff, int bufflen){
char *argv[MAX_PARAM_STRINGS];
int argc,i;
HINSTANCE elibrary = NULL;
HINSTANCE plibrary = NULL;
char *tmpbuff = malloc(bufflen);
char *tmpbuff2 = malloc(bufflen);
for(argc=0;argc < numstrings && argc < MAX_PARAM_STRINGS - 1; ++argc)
argv[argc] =
(argc) ? argv[argc - 1] + strlen(argv[argc - 1]) + 1 : strings;
argv[argc] = NULL;
if((elibrary = LoadLibraryEx(mf.event, NULL, DONT_RESOLVE_DLL_REFERENCES))
== NULL)
FM_RETURN(NULL);
if(!FormatMessage(FORMAT_MESSAGE_FROM_HMODULE |
FORMAT_MESSAGE_IGNORE_INSERTS | NL_TREATMENT,
(LPCVOID) elibrary,
id,
DEFAULT_LANGID,
tmpbuff2,
(DWORD) bufflen,
NULL)){
FM_RETURN(NULL);
}
if(mf.param != NULL)
plibrary = LoadLibraryEx(mf.param, NULL, DONT_RESOLVE_DLL_REFERENCES);
if(plibrary){
for(i=0;argv[i];++i)
if(expand_message(argv[i], plibrary, tmpbuff, bufflen) != NULL)
argv[i] = strdup(tmpbuff);
else
argv[i] = strdup(argv[i]); /* All gets malloced, so I don't have to
bother what to free... */
if(expand_message(tmpbuff2, plibrary, tmpbuff, bufflen) != NULL)
strcpy(tmpbuff2,tmpbuff);
}
if(!FormatMessage(FORMAT_MESSAGE_FROM_STRING |
FORMAT_MESSAGE_ARGUMENT_ARRAY | NL_TREATMENT,
(LPCVOID) tmpbuff2,
id,
DEFAULT_LANGID,
buff,
(DWORD) bufflen,
argv)){
FM_RETURN(NULL);
}
FM_RETURN(buff);
}
#undef FM_RETURN
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