Stephen Davis / Mbed 2 deprecated BT_Hub

Library set up as dummy module on mbed to mimic Nordic.

Dependencies:   mbed-rtos mbed

packetformatter.cpp@2:9ab591cf81b8, 2016-12-13 (annotated)

Committer:
Stephen_NewVistas
Date:
Tue Dec 13 00:20:29 2016 +0000
Revision:
2:9ab591cf81b8
Parent:
1:d6b18299a715 
everything commented . now going to strip out mbed stuff.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Stephen_NewVistas 0:226550611f0d 1 #include <stdio.h>
Stephen_NewVistas 0:226550611f0d 2 #include <string.h>
Stephen_NewVistas 0:226550611f0d 3 #include "packetformatter.h"
Stephen_NewVistas 0:226550611f0d 4 #include "charactercode.h"
Stephen_NewVistas 0:226550611f0d 5 //#define DEBUG
Stephen_NewVistas 0:226550611f0d 6
Stephen_NewVistas 0:226550611f0d 7 static unsigned int checkSum;
Stephen_NewVistas 0:226550611f0d 8 static unsigned int packetSize;
Stephen_NewVistas 0:226550611f0d 9 static unsigned char buffer[1024];
Stephen_NewVistas 0:226550611f0d 10
Stephen_NewVistas 0:226550611f0d 11 /******************************************************************************
Stephen_NewVistas 0:226550611f0d 12 * Function ConvertToPacket( Packet *_packet , unsigned char *_buffer )
Stephen_NewVistas 0:226550611f0d 13 *
Stephen_NewVistas 0:226550611f0d 14 * This function is passed an empty packet a buffer with a message. The message
Stephen_NewVistas 0:226550611f0d 15 * is broken down and placed into the packet.
Stephen_NewVistas 0:226550611f0d 16 *
Stephen_NewVistas 0:226550611f0d 17 *
Stephen_NewVistas 0:226550611f0d 18 * PreCondition: None
Stephen_NewVistas 0:226550611f0d 19 *
Stephen_NewVistas 0:226550611f0d 20 * Input: '_packet' - empty packet , '_buffer' - message
Stephen_NewVistas 0:226550611f0d 21 *
Stephen_NewVistas 0:226550611f0d 22 * Output:
Stephen_NewVistas 0:226550611f0d 23 *
Stephen_NewVistas 0:226550611f0d 24 * Side Effects: None
Stephen_NewVistas 0:226550611f0d 25 *
Stephen_NewVistas 0:226550611f0d 26 *****************************************************************************/
Stephen_NewVistas 0:226550611f0d 27 int ConvertToPacket( Packet *_packet , unsigned char *_buffer ){
Stephen_NewVistas 0:226550611f0d 28 memset( _packet , '\0' , sizeof( Packet ) );
Stephen_NewVistas 0:226550611f0d 29
Stephen_NewVistas 0:226550611f0d 30 _packet->deviceID = (int)_buffer[1] ;
Stephen_NewVistas 1:d6b18299a715 31 _packet->sourceID = (int)_buffer[2] ;
Stephen_NewVistas 0:226550611f0d 32 _packet->command = _buffer[3];
Stephen_NewVistas 0:226550611f0d 33 _packet->packetLength = _buffer[4];
Stephen_NewVistas 0:226550611f0d 34 _packet->packetLength = _packet->packetLength << 8;
Stephen_NewVistas 0:226550611f0d 35 _packet->packetLength |= _buffer[5];
Stephen_NewVistas 0:226550611f0d 36
Stephen_NewVistas 0:226550611f0d 37 int i;
Stephen_NewVistas 0:226550611f0d 38 for( i = 0 ; i < _packet->packetLength ; i++ ){
Stephen_NewVistas 0:226550611f0d 39 _packet->packetData[i] = *( _buffer + i + 6 );
Stephen_NewVistas 0:226550611f0d 40 }
Stephen_NewVistas 0:226550611f0d 41 return 0;
Stephen_NewVistas 0:226550611f0d 42 }
Stephen_NewVistas 0:226550611f0d 43
Stephen_NewVistas 0:226550611f0d 44 /******************************************************************************
Stephen_NewVistas 0:226550611f0d 45 * Function unsigned short escapedToSpecialChar(unsigned char)
Stephen_NewVistas 0:226550611f0d 46 *
Stephen_NewVistas 0:226550611f0d 47 * This function is called to convert a data if it is a special character (0x7F, 0x8F, 0x8E)
Stephen_NewVistas 0:226550611f0d 48 * to equivalent escaped character.
Stephen_NewVistas 0:226550611f0d 49 *
Stephen_NewVistas 0:226550611f0d 50 * e.g. Special Character Escaped Character
Stephen_NewVistas 0:226550611f0d 51 * 0x7F = 0x8E 0x01
Stephen_NewVistas 0:226550611f0d 52 * 0x8F = 0x8E 0x02
Stephen_NewVistas 0:226550611f0d 53 * 0x8E = 0x8E 0x8E
Stephen_NewVistas 0:226550611f0d 54 *
Stephen_NewVistas 0:226550611f0d 55 * PreCondition: None
Stephen_NewVistas 0:226550611f0d 56 *
Stephen_NewVistas 0:226550611f0d 57 * Input: 'c' - character to convert if it is an special character.
Stephen_NewVistas 0:226550611f0d 58 *
Stephen_NewVistas 0:226550611f0d 59 * Output: Equivalent escaped character
Stephen_NewVistas 0:226550611f0d 60 *
Stephen_NewVistas 0:226550611f0d 61 * Side Effects: None
Stephen_NewVistas 0:226550611f0d 62 *
Stephen_NewVistas 0:226550611f0d 63 *****************************************************************************/
Stephen_NewVistas 0:226550611f0d 64 unsigned short
Stephen_NewVistas 0:226550611f0d 65 specialToEscapedChar(unsigned char c)
Stephen_NewVistas 0:226550611f0d 66 {
Stephen_NewVistas 0:226550611f0d 67
Stephen_NewVistas 0:226550611f0d 68 unsigned short escapedChar = 0;
Stephen_NewVistas 0:226550611f0d 69 char isSpecialChar = ((STARTPOLL == c) || (STARTPACKET == c) || (FLAGBYTE == c));
Stephen_NewVistas 0:226550611f0d 70
Stephen_NewVistas 0:226550611f0d 71 if(isSpecialChar)
Stephen_NewVistas 0:226550611f0d 72 {
Stephen_NewVistas 0:226550611f0d 73 escapedChar = (FLAGBYTE << 8);
Stephen_NewVistas 0:226550611f0d 74 switch(c)
Stephen_NewVistas 0:226550611f0d 75 {
Stephen_NewVistas 0:226550611f0d 76 case STARTPACKET:
Stephen_NewVistas 0:226550611f0d 77 escapedChar |= 0x01;
Stephen_NewVistas 0:226550611f0d 78 break;
Stephen_NewVistas 0:226550611f0d 79 case STARTPOLL:
Stephen_NewVistas 0:226550611f0d 80 escapedChar |= 0x02;
Stephen_NewVistas 0:226550611f0d 81 break;
Stephen_NewVistas 0:226550611f0d 82 case FLAGBYTE:
Stephen_NewVistas 0:226550611f0d 83 escapedChar |= FLAGBYTE;
Stephen_NewVistas 0:226550611f0d 84 break;
Stephen_NewVistas 0:226550611f0d 85 }
Stephen_NewVistas 0:226550611f0d 86 }
Stephen_NewVistas 0:226550611f0d 87 else
Stephen_NewVistas 0:226550611f0d 88 {
Stephen_NewVistas 0:226550611f0d 89 escapedChar = (unsigned char) c;
Stephen_NewVistas 0:226550611f0d 90 }
Stephen_NewVistas 0:226550611f0d 91
Stephen_NewVistas 0:226550611f0d 92 return escapedChar;
Stephen_NewVistas 0:226550611f0d 93 }
Stephen_NewVistas 0:226550611f0d 94
Stephen_NewVistas 0:226550611f0d 95 /******************************************************************************
Stephen_NewVistas 0:226550611f0d 96 * Function static void insertValueToBuffer(unsigned char)
Stephen_NewVistas 0:226550611f0d 97 *
Stephen_NewVistas 0:226550611f0d 98 * This function is called to insert the value to buffer.
Stephen_NewVistas 0:226550611f0d 99 *
Stephen_NewVistas 0:226550611f0d 100 * PreCondition: None
Stephen_NewVistas 0:226550611f0d 101 *
Stephen_NewVistas 0:226550611f0d 102 * Input: 'value' - value to insert in the buffer.
Stephen_NewVistas 0:226550611f0d 103 *
Stephen_NewVistas 0:226550611f0d 104 * Output: None
Stephen_NewVistas 0:226550611f0d 105 *
Stephen_NewVistas 0:226550611f0d 106 * Side Effects: Increment the packetSize variable
Stephen_NewVistas 0:226550611f0d 107 *
Stephen_NewVistas 0:226550611f0d 108 *****************************************************************************/
Stephen_NewVistas 0:226550611f0d 109 static void
Stephen_NewVistas 0:226550611f0d 110 insertValueToBuffer(unsigned char value)
Stephen_NewVistas 0:226550611f0d 111 {
Stephen_NewVistas 0:226550611f0d 112 buffer[packetSize] = value;
Stephen_NewVistas 0:226550611f0d 113 packetSize++;
Stephen_NewVistas 0:226550611f0d 114 }
Stephen_NewVistas 0:226550611f0d 115
Stephen_NewVistas 0:226550611f0d 116 /******************************************************************************
Stephen_NewVistas 0:226550611f0d 117 * Function static void processPacketData(unsigned char)
Stephen_NewVistas 0:226550611f0d 118 *
Stephen_NewVistas 0:226550611f0d 119 * This function is called to process the packet if it is a special character it will
Stephen_NewVistas 0:226550611f0d 120 * convert to escaped character e.g. 0x7F = 0x8E 0x01, 0x8E = 0x8E 0x8E, 0x8F = 0x8E 0x02.
Stephen_NewVistas 0:226550611f0d 121 * The size of return value of specialToEscapedChar function is 2 bytes so it must be inserted
Stephen_NewVistas 0:226550611f0d 122 * in the buffer twice.
Stephen_NewVistas 0:226550611f0d 123 *
Stephen_NewVistas 0:226550611f0d 124 * PreCondition: None
Stephen_NewVistas 0:226550611f0d 125 *
Stephen_NewVistas 0:226550611f0d 126 * Input: 'packetData' - value to convert if it is a special character.
Stephen_NewVistas 0:226550611f0d 127 *
Stephen_NewVistas 0:226550611f0d 128 * Output: None
Stephen_NewVistas 0:226550611f0d 129 *
Stephen_NewVistas 0:226550611f0d 130 * Side Effects: None
Stephen_NewVistas 0:226550611f0d 131 *
Stephen_NewVistas 0:226550611f0d 132 *****************************************************************************/
Stephen_NewVistas 0:226550611f0d 133 static void
Stephen_NewVistas 0:226550611f0d 134 processPacketData(unsigned char packetData)
Stephen_NewVistas 0:226550611f0d 135 {
Stephen_NewVistas 0:226550611f0d 136
Stephen_NewVistas 0:226550611f0d 137 unsigned short packetDataResult = specialToEscapedChar(packetData);
Stephen_NewVistas 0:226550611f0d 138
Stephen_NewVistas 0:226550611f0d 139 if( (packetDataResult >> 8) != 0)
Stephen_NewVistas 0:226550611f0d 140 {
Stephen_NewVistas 0:226550611f0d 141 insertValueToBuffer((unsigned char)(packetDataResult>> 8));
Stephen_NewVistas 0:226550611f0d 142 }
Stephen_NewVistas 0:226550611f0d 143
Stephen_NewVistas 0:226550611f0d 144 insertValueToBuffer((unsigned char) packetDataResult);
Stephen_NewVistas 0:226550611f0d 145
Stephen_NewVistas 0:226550611f0d 146 }
Stephen_NewVistas 0:226550611f0d 147
Stephen_NewVistas 0:226550611f0d 148 /******************************************************************************
Stephen_NewVistas 0:226550611f0d 149 * Function void getFormattedPacket(Packet *, unsigned char *)
Stephen_NewVistas 0:226550611f0d 150 *
Stephen_NewVistas 0:226550611f0d 151 * This function is called to process the packet in to a series of bytes that
Stephen_NewVistas 0:226550611f0d 152 * conforms into the protocol of the communication.
Stephen_NewVistas 0:226550611f0d 153 * Protocol Format Example:
Stephen_NewVistas 0:226550611f0d 154 * 0x7F - Start Packet
Stephen_NewVistas 0:226550611f0d 155 * 0xFE - Device ID
Stephen_NewVistas 0:226550611f0d 156 * 0x01 - Source ID
Stephen_NewVistas 0:226550611f0d 157 * 0x05 - Command type
Stephen_NewVistas 0:226550611f0d 158 * 0x00 - Payload length 1st byte
Stephen_NewVistas 0:226550611f0d 159 * 0x01 - Payload length 2nd byte
Stephen_NewVistas 0:226550611f0d 160 * 0x04 - Payload or data
Stephen_NewVistas 0:226550611f0d 161 * 0x76 - checksum
Stephen_NewVistas 0:226550611f0d 162 *
Stephen_NewVistas 0:226550611f0d 163 *
Stephen_NewVistas 0:226550611f0d 164 * PreCondition: None
Stephen_NewVistas 0:226550611f0d 165 *
Stephen_NewVistas 0:226550611f0d 166 * Input: 'packet' - instance of Packet data structure that contains the
Stephen_NewVistas 0:226550611f0d 167 * following information:
Stephen_NewVistas 0:226550611f0d 168 * + device id
Stephen_NewVistas 0:226550611f0d 169 * + source id
Stephen_NewVistas 0:226550611f0d 170 * + command
Stephen_NewVistas 0:226550611f0d 171 * + packet or payload length
Stephen_NewVistas 0:226550611f0d 172 * + packet or payload
Stephen_NewVistas 0:226550611f0d 173 *
Stephen_NewVistas 0:226550611f0d 174 * 'packetBuffer' - empty buffer that will be the holder of the process data or packet.
Stephen_NewVistas 0:226550611f0d 175 *
Stephen_NewVistas 0:226550611f0d 176 * Output: Total size of data inserted in the buffer.
Stephen_NewVistas 0:226550611f0d 177 *
Stephen_NewVistas 0:226550611f0d 178 * Side Effects: None
Stephen_NewVistas 0:226550611f0d 179 *
Stephen_NewVistas 0:226550611f0d 180 *****************************************************************************/
Stephen_NewVistas 0:226550611f0d 181 int getFormattedPacket(Packet * packet, unsigned char * packetBuffer)
Stephen_NewVistas 0:226550611f0d 182 {
Stephen_NewVistas 0:226550611f0d 183
Stephen_NewVistas 0:226550611f0d 184 checkSum = 0;
Stephen_NewVistas 0:226550611f0d 185 packetSize = 0;
Stephen_NewVistas 0:226550611f0d 186
Stephen_NewVistas 0:226550611f0d 187 insertValueToBuffer(STARTPACKET);
Stephen_NewVistas 0:226550611f0d 188 checkSum += STARTPACKET;
Stephen_NewVistas 0:226550611f0d 189
Stephen_NewVistas 0:226550611f0d 190 #ifdef DEBUG
Stephen_NewVistas 0:226550611f0d 191 printf("Start Packet: %x\n", STARTPACKET);
Stephen_NewVistas 0:226550611f0d 192 #endif
Stephen_NewVistas 0:226550611f0d 193
Stephen_NewVistas 0:226550611f0d 194 processPacketData(packet->deviceID);
Stephen_NewVistas 0:226550611f0d 195 checkSum += packet->deviceID;
Stephen_NewVistas 0:226550611f0d 196
Stephen_NewVistas 0:226550611f0d 197 #ifdef DEBUG
Stephen_NewVistas 0:226550611f0d 198 printf("Device ID: %x\n", packet->deviceID);
Stephen_NewVistas 0:226550611f0d 199 #endif
Stephen_NewVistas 0:226550611f0d 200
Stephen_NewVistas 0:226550611f0d 201 processPacketData(packet->sourceID);
Stephen_NewVistas 0:226550611f0d 202 checkSum += packet->sourceID;
Stephen_NewVistas 0:226550611f0d 203
Stephen_NewVistas 0:226550611f0d 204 #ifdef DEBUG
Stephen_NewVistas 0:226550611f0d 205 printf("Source ID: %x\n", packet->sourceID);
Stephen_NewVistas 0:226550611f0d 206 #endif
Stephen_NewVistas 0:226550611f0d 207
Stephen_NewVistas 0:226550611f0d 208 processPacketData(packet->command);
Stephen_NewVistas 0:226550611f0d 209 checkSum += packet->command;
Stephen_NewVistas 0:226550611f0d 210
Stephen_NewVistas 0:226550611f0d 211 #ifdef DEBUG
Stephen_NewVistas 0:226550611f0d 212 printf("Command: %x\n", packet->command);
Stephen_NewVistas 0:226550611f0d 213 #endif
Stephen_NewVistas 0:226550611f0d 214
Stephen_NewVistas 0:226550611f0d 215 unsigned char mostSignificantBytePacketLength = packet->packetLength >> 8;
Stephen_NewVistas 0:226550611f0d 216 unsigned char leastSignificantBytePacketLength = (unsigned char) packet->packetLength;
Stephen_NewVistas 0:226550611f0d 217 processPacketData(mostSignificantBytePacketLength);
Stephen_NewVistas 0:226550611f0d 218 checkSum += mostSignificantBytePacketLength;
Stephen_NewVistas 0:226550611f0d 219 processPacketData(leastSignificantBytePacketLength);
Stephen_NewVistas 0:226550611f0d 220 checkSum += leastSignificantBytePacketLength;
Stephen_NewVistas 0:226550611f0d 221
Stephen_NewVistas 0:226550611f0d 222 #ifdef DEBUG
Stephen_NewVistas 0:226550611f0d 223 printf("Packet length MSB: %x\n", mostSignificantBytePacketLength);
Stephen_NewVistas 0:226550611f0d 224 printf("Packet length LSB: %x\n", leastSignificantBytePacketLength);
Stephen_NewVistas 0:226550611f0d 225 #endif
Stephen_NewVistas 0:226550611f0d 226
Stephen_NewVistas 0:226550611f0d 227 int i;
Stephen_NewVistas 0:226550611f0d 228 for(i = 0; i < packet->packetLength; i++)
Stephen_NewVistas 0:226550611f0d 229 {
Stephen_NewVistas 0:226550611f0d 230 processPacketData(packet->packetData[i]);
Stephen_NewVistas 0:226550611f0d 231 checkSum += packet->packetData[i];
Stephen_NewVistas 0:226550611f0d 232
Stephen_NewVistas 0:226550611f0d 233 #ifdef DEBUG
Stephen_NewVistas 0:226550611f0d 234 printf("Data %d: %x\n", i, packet->packetData[i]);
Stephen_NewVistas 0:226550611f0d 235 #endif
Stephen_NewVistas 0:226550611f0d 236 }
Stephen_NewVistas 0:226550611f0d 237
Stephen_NewVistas 0:226550611f0d 238 unsigned char checksumLSB = (unsigned char)(checkSum & 0xFF);
Stephen_NewVistas 0:226550611f0d 239 unsigned char twosComplementCheckSum = ~checksumLSB + 1;
Stephen_NewVistas 0:226550611f0d 240 processPacketData(twosComplementCheckSum);
Stephen_NewVistas 0:226550611f0d 241
Stephen_NewVistas 0:226550611f0d 242 #ifdef DEBUG
Stephen_NewVistas 0:226550611f0d 243 printf("Checksum: %x\n", twosComplementCheckSum);
Stephen_NewVistas 0:226550611f0d 244 #endif
Stephen_NewVistas 0:226550611f0d 245
Stephen_NewVistas 0:226550611f0d 246 memcpy(packetBuffer, buffer, packetSize);
Stephen_NewVistas 0:226550611f0d 247
Stephen_NewVistas 0:226550611f0d 248 return packetSize;
Stephen_NewVistas 0:226550611f0d 249 }
Stephen_NewVistas 0:226550611f0d 250
Stephen_NewVistas 0:226550611f0d 251 /******************************************************************************
Stephen_NewVistas 0:226550611f0d 252 * Function void getFormattedBootloaderPacket(unsigned char *, unsigned char *, int)
Stephen_NewVistas 0:226550611f0d 253 *
Stephen_NewVistas 0:226550611f0d 254 * This function is called to process the data in to a series of bytes that
Stephen_NewVistas 0:226550611f0d 255 * conforms into the bootloader protocol.
Stephen_NewVistas 0:226550611f0d 256 * Protocol Format Example:
Stephen_NewVistas 0:226550611f0d 257 * 0x55 - STX or Start of TeXt
Stephen_NewVistas 0:226550611f0d 258 * 0x55 - STX or Start of TeXt
Stephen_NewVistas 0:226550611f0d 259 * 0x01 - Data
Stephen_NewVistas 0:226550611f0d 260 * 0x03 - Data
Stephen_NewVistas 0:226550611f0d 261 * 0x0C - Checksum
Stephen_NewVistas 0:226550611f0d 262 * 0x04 - ETX or End of TeXt
Stephen_NewVistas 0:226550611f0d 263 *
Stephen_NewVistas 0:226550611f0d 264 *
Stephen_NewVistas 0:226550611f0d 265 * PreCondition: None
Stephen_NewVistas 0:226550611f0d 266 *
Stephen_NewVistas 0:226550611f0d 267 * Input:
Stephen_NewVistas 0:226550611f0d 268 * 'buffer' - empty buffer that will be the holder of the process.
Stephen_NewVistas 0:226550611f0d 269 * 'data' - values to be send in bootloader.
Stephen_NewVistas 0:226550611f0d 270 * 'size' - size of data to be send.
Stephen_NewVistas 0:226550611f0d 271 *
Stephen_NewVistas 0:226550611f0d 272 * Output: Total size of data inserted in the buffer.
Stephen_NewVistas 0:226550611f0d 273 *
Stephen_NewVistas 0:226550611f0d 274 * Side Effects: None
Stephen_NewVistas 0:226550611f0d 275 *
Stephen_NewVistas 0:226550611f0d 276 *****************************************************************************/
Stephen_NewVistas 0:226550611f0d 277 int
Stephen_NewVistas 0:226550611f0d 278 getFormattedBootloaderPacket(unsigned char *buffer, unsigned char *data, int size)
Stephen_NewVistas 0:226550611f0d 279 {
Stephen_NewVistas 0:226550611f0d 280 int i;
Stephen_NewVistas 0:226550611f0d 281 int j;
Stephen_NewVistas 0:226550611f0d 282 int sum;
Stephen_NewVistas 0:226550611f0d 283
Stephen_NewVistas 0:226550611f0d 284 i = 0;
Stephen_NewVistas 0:226550611f0d 285 buffer[i++] = STX;
Stephen_NewVistas 0:226550611f0d 286 buffer[i++] = STX;
Stephen_NewVistas 0:226550611f0d 287 sum = 0;
Stephen_NewVistas 0:226550611f0d 288
Stephen_NewVistas 0:226550611f0d 289 for(j = 0; j < size; j++)
Stephen_NewVistas 0:226550611f0d 290 {
Stephen_NewVistas 0:226550611f0d 291 if(data[j] == ETX || data[j] == STX || data[j] == ENQ)
Stephen_NewVistas 0:226550611f0d 292 {
Stephen_NewVistas 0:226550611f0d 293 buffer[j+i++] = ENQ;
Stephen_NewVistas 0:226550611f0d 294 }
Stephen_NewVistas 0:226550611f0d 295
Stephen_NewVistas 0:226550611f0d 296 buffer[j+i] = data[j];
Stephen_NewVistas 0:226550611f0d 297 sum += data[j];
Stephen_NewVistas 0:226550611f0d 298 }
Stephen_NewVistas 0:226550611f0d 299
Stephen_NewVistas 0:226550611f0d 300 sum = ((sum * -1) & 0xFF);
Stephen_NewVistas 0:226550611f0d 301 if (sum == ETX || sum == STX || sum == ENQ)
Stephen_NewVistas 0:226550611f0d 302 buffer[j+i++] = ENQ;
Stephen_NewVistas 0:226550611f0d 303
Stephen_NewVistas 0:226550611f0d 304 buffer[j+i] = sum;
Stephen_NewVistas 0:226550611f0d 305 j++;
Stephen_NewVistas 0:226550611f0d 306 buffer[j+i] = ETX;
Stephen_NewVistas 0:226550611f0d 307 j++;
Stephen_NewVistas 0:226550611f0d 308
Stephen_NewVistas 0:226550611f0d 309 //printf("getFormattedBootloaderPacket return = %d\n",j+i);
Stephen_NewVistas 0:226550611f0d 310
Stephen_NewVistas 0:226550611f0d 311 return (j+i);
Stephen_NewVistas 0:226550611f0d 312 }
Stephen_NewVistas 0:226550611f0d 313
Stephen_NewVistas 0:226550611f0d 314