FreeCalypso > hg > fc-magnetite
diff src/gpf3/ccd/s_padding_0.c @ 2:c41a534f33c6
src/gpf3: preened GPF goo from TCS3.2
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 25 Sep 2016 23:52:50 +0000 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/gpf3/ccd/s_padding_0.c Sun Sep 25 23:52:50 2016 +0000 @@ -0,0 +1,213 @@ +/* ++----------------------------------------------------------------------------- +| 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 */