FreeCalypso > hg > freecalypso-sw
view gsm-fw/ccd/s_padding_0.c @ 946:845c2e420069
target-utils/c139explore utility started
author | Mychaela Falconia <falcon@ivan.Harhan.ORG> |
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date | Mon, 02 Nov 2015 18:09:37 +0000 |
parents | 970d6199f2c5 |
children |
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/* +----------------------------------------------------------------------------- | Project : CCD | Modul : s_padding_0.c +----------------------------------------------------------------------------- | Copyright 2002 Texas Instruments Berlin, AG | All rights reserved. | | This file is confidential and a trade secret of Texas | Instruments Berlin, AG | The receipt of or possession of this file does not convey | any rights to reproduce or disclose its contents or to | manufacture, use, or sell anything it may describe, in | whole, or in part, without the specific written consent of | Texas Instruments Berlin, AG. +----------------------------------------------------------------------------- | Purpose : Definition of encoding and decoding functions for S_PADDING_0 +----------------------------------------------------------------------------- */ /* * standard definitions like GLOBAL, UCHAR, ERROR etc. */ #include "typedefs.h" #include "header.h" /* * Prototypes of ccd (USE_DRIVER EQ undef) for prototypes only * look at ccdapi.h */ #undef USE_DRIVER #include "ccdapi.h" /* * Types and functions for bit access and manipulation */ #include "ccd_globs.h" #include "bitfun.h" /* * Prototypes of ccd internal functions */ #include "ccd.h" /* * Declaration of coder/decoder tables */ #include "ccdtable.h" #include "ccddata.h" #ifndef RUN_FLASH /* +--------------------------------------------------------------------+ | PROJECT : CCD MODULE : s_padding_0 | | STATE : code ROUTINE : cdc_padd_0_decode | +--------------------------------------------------------------------+ PURPOSE : Decoding of the GSM Type CSN1 spare padding which is preceded by a 0 bit. If that bit is read as 1 then a protocol extension is assumed by CCD. This function does not evaluate the encoded bits, since their content is irrelevant. */ SHORT cdc_padd_0_decode (const ULONG c_ref, const ULONG e_ref, T_CCD_Globs *globs) { U16 cixRef; #ifdef DEBUG_CCD TRACE_CCD (globs, "cdc_padd_0_decode()"); #endif if (bf_readBit(globs) == 1) { ccd_recordFault (globs, ERR_PROTOCOL_EXTENSION, CONTINUE, (USHORT) e_ref, NULL); } /* * Do not decode padding bits. They are not relevant. * Just adjust the position pointer in the bit stream buffer. * Either to the next octet boundary or to the message end, if necessary. */ bf_incBitpos (8-(globs->bitpos & 7), globs); /* First assume padding bits up to an octet boundary. In this case * message extension could be made of T, TV or TLV types. */ globs->SeekTLVExt = TRUE; cixRef = melem[e_ref].calcIdxRef; if (calcidx[cixRef].numPrologSteps > 0) { U16 msgEnd = (USHORT) calc[calcidx[cixRef].prologStepRef].operand * 8; if (msgEnd) { msgEnd += globs->bitoffs; msgEnd = (USHORT)MINIMUM(globs->maxBitpos, msgEnd); bf_setBitpos (msgEnd, globs); /* * Padding bytes exclude the presence of message extension. */ globs->SeekTLVExt = FALSE; } } return 1; } #endif /* !RUN_FLASH */ #ifndef RUN_FLASH /* +--------------------------------------------------------------------+ | PROJECT : CCD MODULE : s_padding_0.c | | STATE : code ROUTINE : cdc_padd_0_encode | +--------------------------------------------------------------------+ PURPOSE : Encoding of the GSM Type CSN1 spare padding which is preceded by a 0 bit. Supported padding values are 0x00 and 0x2B. If the first prologue step is a value msg_len, padding is done until globs->bitpos is msg_len*8. Otherwise until the octet boundary. */ SHORT cdc_padd_0_encode (const ULONG c_ref, const ULONG e_ref, T_CCD_Globs *globs) { U8 padd_bit = 0; U16 cixRef; U16 msgLen = globs->buflen; BOOL paddingOctets = FALSE; #ifdef DEBUG_CCD TRACE_CCD (globs, "cdc_padd_0_encode()"); #endif cixRef = melem[e_ref].calcIdxRef; /* * if this element is conditional, check the condition */ if (calcidx[cixRef].numCondCalcs NEQ 0 AND ! ccd_conditionOK (e_ref, globs)) return 1; if (calcidx[cixRef].numPrologSteps > 0) { if (calc[calcidx[cixRef].prologStepRef].operation NEQ 'P') ccd_setError (globs, ERR_INTERNAL_ERROR, BREAK, (USHORT) -1); else { msgLen = (USHORT)(calc[calcidx[cixRef].prologStepRef].operand * 8); paddingOctets = TRUE; } } /* * If there is some space left for spare padding, we will code them. * If the bit pos pointer goes beyond the message border, ccd will detect * this later and bring a warning. But not here. Reason: saving room. */ if (globs->bitpos - globs->bitoffs < msgLen ) { /* * The IE should be present in the message so we code 0 bit. */ bf_writeBit (0, globs); if (melem[e_ref].elemType EQ 'S' AND spare[melem[e_ref].elemRef].bSize EQ 8) { ULONG spareVal = spare[melem[e_ref].elemRef].value; /* * Element is a SPARE of length 8. */ while (globs->bitpos % 8 NEQ 0) { switch(spareVal) { case 0: break; case 0x2B: padd_bit = (UBYTE)GET_HL(0); break; default: ccd_setError (globs, ERR_INTERNAL_ERROR, BREAK, (USHORT) (globs->bitpos), (USHORT) -1); } bf_writeBit (padd_bit, globs); } /* Write spare padding octets. */ if (paddingOctets) { while (globs->bitpos - globs->bitoffs < msgLen ) { bf_codeLongNumber (8, spareVal, globs); } } } else { ccd_setError (globs, ERR_INVALID_TYPE, BREAK, (USHORT) (globs->bitpos), (USHORT) -1); } } return 1; } #endif /* !RUN_FLASH */