Sample C application which calls ossPrintPER three times with various flag settings (prntper.c):
/*****************************************************************************/
/* Copyright (C) 1999-2002 OSS Nokalva, Inc. All rights reserved */
/*****************************************************************************/
/* Application Program: prntper.c */
/* encodes a sample baseball card */
/* using BCAS (Baseball Card Abstract Syntax) */
/* illustrate customization of printper output */
#include <stdio.h>
#include "bcas.h" /* compiler-generated header file */
#include "printasn.h"
/* Sample ossPrintPER hook */
ossBoolean DLL_ENTRY_FDEF
ossPrintPER_SampleHook(struct ossGlobal *world,
struct PrintPerRecord *record);
/* The following encodes a card. If the card is successfully encoded, decodes it. */
int main()
{
OssBuf encodedData; /* length and address of encoded data */
BBCard *myCardPtr = NULL; /* address of decoded data */
int pdu_num = 0;
struct ossGlobal w, *world = &w;
char *buf; /* saves address of encoded data */
long buf_length; /* saves length of encoded data */
int retcode; /* return code */
ossinit(world, bcas);
ossSetEncodingFlags(world, DEBUGPDU);
ossSetDecodingFlags(world, DEBUGPDU);
/* Print input to encoder */
ossPrint(world, "\nThe input to the encoder ...\n\n");
ossPrintPDU(world, BBCard_PDU, &myCard);
/* Encode a card. Return non-zero for failure. */
ossPrint(world,
"\nThe encoder's trace messages (none for time-optimized) ...\n\n");
/* Encode a card. Return non-zero for failure. */
encodedData.value = NULL;
encodedData.length = 0;
if (ossEncode(world, BBCard_PDU, &myCard, &encodedData)) {
ossPrint(world, "%s\n", ossGetErrMsg(world));
return 1;
} else {
ossPrint(world, "Card encoded\n"); /* card was successfully encoded */
buf = (char *)encodedData.value; /* saves buffer address
* with encoded data. */
buf_length = (long) encodedData.length; /* saves the length of *
* encoded data */
/* Decode a card whose encoding is in encodedData. Return non-zero
* for failure. */
ossPrint(world, "\n\n The default ossPrintPER output\n\n");
/* Call ossPrintPER without any additional flags set*/
if (ossPrintPER(world, &pdu_num, &encodedData, NULL, 0, NULL)) {
ossPrint(world, "%s\n", ossGetErrMsg(world));
retcode = 1;
} else {
/* Restore encoded data buffer */
encodedData.length = buf_length;
encodedData.value = (unsigned char *) buf;
/* Call ossPrintPER with application hook provided */
ossPrint(world, "\n\nThe ossPrintPER output when the application");
ossPrint(world, " hook is provided\n\n");
if (ossPrintPER(world, &pdu_num, &encodedData, NULL, 0,
ossPrintPER_SampleHook)) {
ossPrint(world, "%s\n", ossGetErrMsg(world));
retcode = 1;
} else {
/* Restore encoded data buffer */
encodedData.length = buf_length;
encodedData.value = (unsigned char *) buf;
/* Call ossPrintPER with additonal flags set *
* to customize its output */
ossPrint(world, "\n\nThe customized ossPrintPER output\n\n");
if (ossPrintPER(world, &pdu_num, &encodedData, NULL,
OSS_HEXBYTES + OSS_PRINT_ABSREF + OSS_PRINT_OFFSET +
OSS_PRINT_TYPE_INFO + OSS_PRINT_COMMENTS,
NULL)) {
ossPrint(world, "%s\n", ossGetErrMsg(world));
retcode = 1;
} else {
retcode = 0;
}
}
}
/* Free encoder's output buffer*/
ossFreeBuf(world, buf);
}
/*
* Call ossterm() to free all resources
*/
ossterm(world);
return retcode;
}
ossBoolean DLL_ENTRY_FDEF ossPrintPER_SampleHook(struct ossGlobal *world,
struct PrintPerRecord *record)
{
char *constructed = "";
int index, index1;
switch (record->typeId) {
case OSS_CHOICE_BEGIN_PPR:
case OSS_SEQ_SET_BEGIN_PPR:
constructed = "constructed ";
case OSS_ASN1_TYPE_PPR:
if (record->qualifiedName) {
ossPrint(world, "Decoding of %stype \"%s\" started\n",
constructed, record->qualifiedName);
} else {
ossPrint(world, "Decoding of PDU \"%s\" started\n",
record->typeName);
}
break;
case OSS_CHOICE_FINISHED_PPR:
case OSS_SEQ_SET_FINISHED_PPR:
if (record->qualifiedName)
ossPrint(world, "Decoding of constructed type \"%s\" finished\n",
record->qualifiedName);
else
ossPrint(world, "Decoding of PDU \"%s\" finished\n",
record->typeName);
return TRUE;
case OSS_VERSION_BRACKETS_BEGIN_PPR:
ossPrint(world, "Decoding of version brackets started\n");
return TRUE;
case OSS_VERSION_BRACKETS_FINISHED_PPR:
ossPrint(world, "Decoding of version brackets finished\n");
return TRUE;
case OSS_ADDITIONS_TYPE_PPR:
default:
break;
};
if (record->decodedContent)
ossPrint(world, "(Decoded value is: %s)\n", record->decodedContent);
for (index = 0; index < record->numberOfSimplestRecord; index++) {
struct PrintPerSimplestRecord *simplest_record =
record->simplestRecords + index;
char *kind_name;
switch (simplest_record->typeId) {
case OSS_CONTENTS_TYPE_PPR:
kind_name = "contents";
break;
case OSS_LENGTH_TYPE_PPR:
kind_name = "length";
break;
case OSS_PADDING_TYPE_PPR:
kind_name = "padding";
break;
case OSS_EXTENSION_LENGTH_TYPE_PPR:
kind_name = "extension length";
break;
case OSS_EXTENSION_RANGE_TYPE_PPR:
kind_name = "extension range";
break;
case OSS_CHOICE_INDEX_PPR:
kind_name = "choice index";
break;
case OSS_PDU_PADDING_TYPE_PPR:
kind_name = "PDU padding";
break;
case OSS_REALINF_TYPE_PPR:
kind_name = "type of real number encoding";
break;
case OSS_EXPLENGTH_TYPE_PPR:
kind_name = "exponent length";
break;
case OSS_EXP_TYPE_PPR:
kind_name = "exponent";
break;
case OSS_MANTISSA_TYPE_PPR:
kind_name = "mantissa";
break;
case OSS_LENGTH_LEADING_BIT_PPR:
kind_name = "length type bit";
break;
case OSS_EXTENSION_FLAG_TYPE_PPR:
kind_name = "extension flag";
break;
case OSS_EXTENSION_COUNT_TYPE_PPR:
kind_name = "extension preamble length";
break;
case OSS_EXTENSION_PREAMBLE_TYPE_PPR:
kind_name = "extension preamble";
break;
case OSS_PREAMBLE_TYPE_PPR:
kind_name = "preamble";
break;
case OSS_TRAILING_BITS_PPR:
kind_name = "trailing bits";
break;
case OSS_EXT_COUNT_SIZE_FLAG_PPR:
kind_name = "extension preamble size flag";
break;
case OSS_EXT_COUNT_SIZE_PPR:
kind_name = "extension preamble length";
break;
case OSS_CHOICE_INDEX_SIZE_FLAG_PPR:
kind_name = "choice index size flag";
break;
case OSS_CHOICE_INDEX_LENGTH_PPR:
kind_name = "choice index length";
break;
default:
kind_name = "<unknown>";
}
ossPrint(world, "Decoded item:\n");
ossPrint(world, " TypeId: %s\n",
kind_name);
ossPrint(world, " Length of encoding: %d (counted in bits)\n",
simplest_record->length);
ossPrint(world, " Content of encoding: ");
for (index1 = 0; index1 < simplest_record->length; index1++) {
int number_of_byte_to_print =
(simplest_record->encodedBitOffset + index1) / 8;
int number_of_bit_to_print =
(simplest_record->encodedBitOffset + index1) % 8;
unsigned char bit_value =
simplest_record->encodedContent[number_of_byte_to_print] &
(0x80 >> number_of_bit_to_print);
ossPrint(world, "%d", bit_value ? 1 : 0);
/* To avoid huge output; a demoinstration only is needed */
if (index1 > 60) {
ossPrint(world, "...");
break;
}
}
ossPrint(world, "\n");
}
if (record->typeId == OSS_ASN1_TYPE_PPR) {
if (record->qualifiedName)
ossPrint(world, "Decoding of type \"%s\" finished\n",
record->qualifiedName);
else
ossPrint(world, "Decoding of PDU \"%s\" finished\n",
record->typeName);
}
return TRUE;
}
Copyright © 2008 OSS Nokalva, Inc. All Rights Reserved.
