362 lines
10 KiB
C
362 lines
10 KiB
C
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/*
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* Copyright 1992 by Jutta Degener and Carsten Bormann, Technische
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* Universitaet Berlin. See the accompanying file "COPYRIGHT" for
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* details. THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
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*/
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/* $Header$ */
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#include "private.h"
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#include "gsm.h"
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#include "proto.h"
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int gsm_decode P3((s, c, target), gsm s, gsm_byte * c, gsm_signal * target)
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{
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word LARc[8], Nc[4], Mc[4], bc[4], xmaxc[4], xmc[13*4];
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#ifdef WAV49
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if (s->wav_fmt) {
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uword sr = 0;
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s->frame_index = !s->frame_index;
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if (s->frame_index) {
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sr = *c++;
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LARc[0] = sr & 0x3f; sr >>= 6;
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sr |= (uword)*c++ << 2;
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LARc[1] = sr & 0x3f; sr >>= 6;
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sr |= (uword)*c++ << 4;
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LARc[2] = sr & 0x1f; sr >>= 5;
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LARc[3] = sr & 0x1f; sr >>= 5;
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sr |= (uword)*c++ << 2;
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LARc[4] = sr & 0xf; sr >>= 4;
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LARc[5] = sr & 0xf; sr >>= 4;
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sr |= (uword)*c++ << 2; /* 5 */
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LARc[6] = sr & 0x7; sr >>= 3;
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LARc[7] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 4;
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Nc[0] = sr & 0x7f; sr >>= 7;
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bc[0] = sr & 0x3; sr >>= 2;
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Mc[0] = sr & 0x3; sr >>= 2;
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sr |= (uword)*c++ << 1;
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xmaxc[0] = sr & 0x3f; sr >>= 6;
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xmc[0] = sr & 0x7; sr >>= 3;
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sr = *c++;
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xmc[1] = sr & 0x7; sr >>= 3;
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xmc[2] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 2;
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xmc[3] = sr & 0x7; sr >>= 3;
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xmc[4] = sr & 0x7; sr >>= 3;
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xmc[5] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 1; /* 10 */
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xmc[6] = sr & 0x7; sr >>= 3;
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xmc[7] = sr & 0x7; sr >>= 3;
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xmc[8] = sr & 0x7; sr >>= 3;
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sr = *c++;
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xmc[9] = sr & 0x7; sr >>= 3;
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xmc[10] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 2;
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xmc[11] = sr & 0x7; sr >>= 3;
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xmc[12] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 4;
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Nc[1] = sr & 0x7f; sr >>= 7;
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bc[1] = sr & 0x3; sr >>= 2;
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Mc[1] = sr & 0x3; sr >>= 2;
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sr |= (uword)*c++ << 1;
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xmaxc[1] = sr & 0x3f; sr >>= 6;
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xmc[13] = sr & 0x7; sr >>= 3;
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sr = *c++; /* 15 */
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xmc[14] = sr & 0x7; sr >>= 3;
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xmc[15] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 2;
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xmc[16] = sr & 0x7; sr >>= 3;
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xmc[17] = sr & 0x7; sr >>= 3;
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xmc[18] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 1;
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xmc[19] = sr & 0x7; sr >>= 3;
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xmc[20] = sr & 0x7; sr >>= 3;
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xmc[21] = sr & 0x7; sr >>= 3;
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sr = *c++;
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xmc[22] = sr & 0x7; sr >>= 3;
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xmc[23] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 2;
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xmc[24] = sr & 0x7; sr >>= 3;
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xmc[25] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 4; /* 20 */
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Nc[2] = sr & 0x7f; sr >>= 7;
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bc[2] = sr & 0x3; sr >>= 2;
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Mc[2] = sr & 0x3; sr >>= 2;
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sr |= (uword)*c++ << 1;
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xmaxc[2] = sr & 0x3f; sr >>= 6;
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xmc[26] = sr & 0x7; sr >>= 3;
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sr = *c++;
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xmc[27] = sr & 0x7; sr >>= 3;
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xmc[28] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 2;
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xmc[29] = sr & 0x7; sr >>= 3;
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xmc[30] = sr & 0x7; sr >>= 3;
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xmc[31] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 1;
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xmc[32] = sr & 0x7; sr >>= 3;
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xmc[33] = sr & 0x7; sr >>= 3;
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xmc[34] = sr & 0x7; sr >>= 3;
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sr = *c++; /* 25 */
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xmc[35] = sr & 0x7; sr >>= 3;
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xmc[36] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 2;
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xmc[37] = sr & 0x7; sr >>= 3;
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xmc[38] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 4;
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Nc[3] = sr & 0x7f; sr >>= 7;
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bc[3] = sr & 0x3; sr >>= 2;
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Mc[3] = sr & 0x3; sr >>= 2;
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sr |= (uword)*c++ << 1;
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xmaxc[3] = sr & 0x3f; sr >>= 6;
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xmc[39] = sr & 0x7; sr >>= 3;
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sr = *c++;
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xmc[40] = sr & 0x7; sr >>= 3;
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xmc[41] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 2; /* 30 */
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xmc[42] = sr & 0x7; sr >>= 3;
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xmc[43] = sr & 0x7; sr >>= 3;
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xmc[44] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 1;
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xmc[45] = sr & 0x7; sr >>= 3;
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xmc[46] = sr & 0x7; sr >>= 3;
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xmc[47] = sr & 0x7; sr >>= 3;
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sr = *c++;
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xmc[48] = sr & 0x7; sr >>= 3;
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xmc[49] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 2;
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xmc[50] = sr & 0x7; sr >>= 3;
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xmc[51] = sr & 0x7; sr >>= 3;
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s->frame_chain = sr & 0xf;
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}
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else {
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sr = s->frame_chain;
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sr |= (uword)*c++ << 4; /* 1 */
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LARc[0] = sr & 0x3f; sr >>= 6;
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LARc[1] = sr & 0x3f; sr >>= 6;
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sr = *c++;
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LARc[2] = sr & 0x1f; sr >>= 5;
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sr |= (uword)*c++ << 3;
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LARc[3] = sr & 0x1f; sr >>= 5;
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LARc[4] = sr & 0xf; sr >>= 4;
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sr |= (uword)*c++ << 2;
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LARc[5] = sr & 0xf; sr >>= 4;
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LARc[6] = sr & 0x7; sr >>= 3;
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LARc[7] = sr & 0x7; sr >>= 3;
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sr = *c++; /* 5 */
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Nc[0] = sr & 0x7f; sr >>= 7;
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sr |= (uword)*c++ << 1;
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bc[0] = sr & 0x3; sr >>= 2;
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Mc[0] = sr & 0x3; sr >>= 2;
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sr |= (uword)*c++ << 5;
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xmaxc[0] = sr & 0x3f; sr >>= 6;
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xmc[0] = sr & 0x7; sr >>= 3;
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xmc[1] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 1;
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xmc[2] = sr & 0x7; sr >>= 3;
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xmc[3] = sr & 0x7; sr >>= 3;
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xmc[4] = sr & 0x7; sr >>= 3;
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sr = *c++;
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xmc[5] = sr & 0x7; sr >>= 3;
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xmc[6] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 2; /* 10 */
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xmc[7] = sr & 0x7; sr >>= 3;
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xmc[8] = sr & 0x7; sr >>= 3;
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xmc[9] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 1;
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xmc[10] = sr & 0x7; sr >>= 3;
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xmc[11] = sr & 0x7; sr >>= 3;
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xmc[12] = sr & 0x7; sr >>= 3;
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sr = *c++;
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Nc[1] = sr & 0x7f; sr >>= 7;
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sr |= (uword)*c++ << 1;
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bc[1] = sr & 0x3; sr >>= 2;
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Mc[1] = sr & 0x3; sr >>= 2;
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sr |= (uword)*c++ << 5;
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xmaxc[1] = sr & 0x3f; sr >>= 6;
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xmc[13] = sr & 0x7; sr >>= 3;
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xmc[14] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 1; /* 15 */
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xmc[15] = sr & 0x7; sr >>= 3;
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xmc[16] = sr & 0x7; sr >>= 3;
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xmc[17] = sr & 0x7; sr >>= 3;
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sr = *c++;
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xmc[18] = sr & 0x7; sr >>= 3;
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xmc[19] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 2;
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xmc[20] = sr & 0x7; sr >>= 3;
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xmc[21] = sr & 0x7; sr >>= 3;
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xmc[22] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 1;
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xmc[23] = sr & 0x7; sr >>= 3;
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xmc[24] = sr & 0x7; sr >>= 3;
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xmc[25] = sr & 0x7; sr >>= 3;
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sr = *c++;
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Nc[2] = sr & 0x7f; sr >>= 7;
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sr |= (uword)*c++ << 1; /* 20 */
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bc[2] = sr & 0x3; sr >>= 2;
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Mc[2] = sr & 0x3; sr >>= 2;
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sr |= (uword)*c++ << 5;
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xmaxc[2] = sr & 0x3f; sr >>= 6;
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xmc[26] = sr & 0x7; sr >>= 3;
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xmc[27] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 1;
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xmc[28] = sr & 0x7; sr >>= 3;
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xmc[29] = sr & 0x7; sr >>= 3;
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xmc[30] = sr & 0x7; sr >>= 3;
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sr = *c++;
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xmc[31] = sr & 0x7; sr >>= 3;
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xmc[32] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 2;
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xmc[33] = sr & 0x7; sr >>= 3;
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xmc[34] = sr & 0x7; sr >>= 3;
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xmc[35] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 1; /* 25 */
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xmc[36] = sr & 0x7; sr >>= 3;
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xmc[37] = sr & 0x7; sr >>= 3;
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xmc[38] = sr & 0x7; sr >>= 3;
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sr = *c++;
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Nc[3] = sr & 0x7f; sr >>= 7;
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sr |= (uword)*c++ << 1;
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bc[3] = sr & 0x3; sr >>= 2;
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Mc[3] = sr & 0x3; sr >>= 2;
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sr |= (uword)*c++ << 5;
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xmaxc[3] = sr & 0x3f; sr >>= 6;
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xmc[39] = sr & 0x7; sr >>= 3;
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xmc[40] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 1;
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xmc[41] = sr & 0x7; sr >>= 3;
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xmc[42] = sr & 0x7; sr >>= 3;
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xmc[43] = sr & 0x7; sr >>= 3;
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sr = *c++; /* 30 */
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xmc[44] = sr & 0x7; sr >>= 3;
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xmc[45] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 2;
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xmc[46] = sr & 0x7; sr >>= 3;
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xmc[47] = sr & 0x7; sr >>= 3;
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xmc[48] = sr & 0x7; sr >>= 3;
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sr |= (uword)*c++ << 1;
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xmc[49] = sr & 0x7; sr >>= 3;
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xmc[50] = sr & 0x7; sr >>= 3;
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xmc[51] = sr & 0x7; sr >>= 3;
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}
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}
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else
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#endif
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{
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/* GSM_MAGIC = (*c >> 4) & 0xF; */
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if (((*c >> 4) & 0x0F) != GSM_MAGIC) return -1;
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LARc[0] = (*c++ & 0xF) << 2; /* 1 */
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LARc[0] |= (*c >> 6) & 0x3;
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LARc[1] = *c++ & 0x3F;
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LARc[2] = (*c >> 3) & 0x1F;
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LARc[3] = (*c++ & 0x7) << 2;
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LARc[3] |= (*c >> 6) & 0x3;
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LARc[4] = (*c >> 2) & 0xF;
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LARc[5] = (*c++ & 0x3) << 2;
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LARc[5] |= (*c >> 6) & 0x3;
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LARc[6] = (*c >> 3) & 0x7;
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LARc[7] = *c++ & 0x7;
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Nc[0] = (*c >> 1) & 0x7F;
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bc[0] = (*c++ & 0x1) << 1;
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bc[0] |= (*c >> 7) & 0x1;
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Mc[0] = (*c >> 5) & 0x3;
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xmaxc[0] = (*c++ & 0x1F) << 1;
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xmaxc[0] |= (*c >> 7) & 0x1;
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xmc[0] = (*c >> 4) & 0x7;
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xmc[1] = (*c >> 1) & 0x7;
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xmc[2] = (*c++ & 0x1) << 2;
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xmc[2] |= (*c >> 6) & 0x3;
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xmc[3] = (*c >> 3) & 0x7;
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xmc[4] = *c++ & 0x7;
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xmc[5] = (*c >> 5) & 0x7;
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xmc[6] = (*c >> 2) & 0x7;
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xmc[7] = (*c++ & 0x3) << 1; /* 10 */
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xmc[7] |= (*c >> 7) & 0x1;
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xmc[8] = (*c >> 4) & 0x7;
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xmc[9] = (*c >> 1) & 0x7;
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xmc[10] = (*c++ & 0x1) << 2;
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xmc[10] |= (*c >> 6) & 0x3;
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xmc[11] = (*c >> 3) & 0x7;
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xmc[12] = *c++ & 0x7;
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Nc[1] = (*c >> 1) & 0x7F;
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bc[1] = (*c++ & 0x1) << 1;
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bc[1] |= (*c >> 7) & 0x1;
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||
|
|
Mc[1] = (*c >> 5) & 0x3;
|
||
|
|
xmaxc[1] = (*c++ & 0x1F) << 1;
|
||
|
|
xmaxc[1] |= (*c >> 7) & 0x1;
|
||
|
|
xmc[13] = (*c >> 4) & 0x7;
|
||
|
|
xmc[14] = (*c >> 1) & 0x7;
|
||
|
|
xmc[15] = (*c++ & 0x1) << 2;
|
||
|
|
xmc[15] |= (*c >> 6) & 0x3;
|
||
|
|
xmc[16] = (*c >> 3) & 0x7;
|
||
|
|
xmc[17] = *c++ & 0x7;
|
||
|
|
xmc[18] = (*c >> 5) & 0x7;
|
||
|
|
xmc[19] = (*c >> 2) & 0x7;
|
||
|
|
xmc[20] = (*c++ & 0x3) << 1;
|
||
|
|
xmc[20] |= (*c >> 7) & 0x1;
|
||
|
|
xmc[21] = (*c >> 4) & 0x7;
|
||
|
|
xmc[22] = (*c >> 1) & 0x7;
|
||
|
|
xmc[23] = (*c++ & 0x1) << 2;
|
||
|
|
xmc[23] |= (*c >> 6) & 0x3;
|
||
|
|
xmc[24] = (*c >> 3) & 0x7;
|
||
|
|
xmc[25] = *c++ & 0x7;
|
||
|
|
Nc[2] = (*c >> 1) & 0x7F;
|
||
|
|
bc[2] = (*c++ & 0x1) << 1; /* 20 */
|
||
|
|
bc[2] |= (*c >> 7) & 0x1;
|
||
|
|
Mc[2] = (*c >> 5) & 0x3;
|
||
|
|
xmaxc[2] = (*c++ & 0x1F) << 1;
|
||
|
|
xmaxc[2] |= (*c >> 7) & 0x1;
|
||
|
|
xmc[26] = (*c >> 4) & 0x7;
|
||
|
|
xmc[27] = (*c >> 1) & 0x7;
|
||
|
|
xmc[28] = (*c++ & 0x1) << 2;
|
||
|
|
xmc[28] |= (*c >> 6) & 0x3;
|
||
|
|
xmc[29] = (*c >> 3) & 0x7;
|
||
|
|
xmc[30] = *c++ & 0x7;
|
||
|
|
xmc[31] = (*c >> 5) & 0x7;
|
||
|
|
xmc[32] = (*c >> 2) & 0x7;
|
||
|
|
xmc[33] = (*c++ & 0x3) << 1;
|
||
|
|
xmc[33] |= (*c >> 7) & 0x1;
|
||
|
|
xmc[34] = (*c >> 4) & 0x7;
|
||
|
|
xmc[35] = (*c >> 1) & 0x7;
|
||
|
|
xmc[36] = (*c++ & 0x1) << 2;
|
||
|
|
xmc[36] |= (*c >> 6) & 0x3;
|
||
|
|
xmc[37] = (*c >> 3) & 0x7;
|
||
|
|
xmc[38] = *c++ & 0x7;
|
||
|
|
Nc[3] = (*c >> 1) & 0x7F;
|
||
|
|
bc[3] = (*c++ & 0x1) << 1;
|
||
|
|
bc[3] |= (*c >> 7) & 0x1;
|
||
|
|
Mc[3] = (*c >> 5) & 0x3;
|
||
|
|
xmaxc[3] = (*c++ & 0x1F) << 1;
|
||
|
|
xmaxc[3] |= (*c >> 7) & 0x1;
|
||
|
|
xmc[39] = (*c >> 4) & 0x7;
|
||
|
|
xmc[40] = (*c >> 1) & 0x7;
|
||
|
|
xmc[41] = (*c++ & 0x1) << 2;
|
||
|
|
xmc[41] |= (*c >> 6) & 0x3;
|
||
|
|
xmc[42] = (*c >> 3) & 0x7;
|
||
|
|
xmc[43] = *c++ & 0x7; /* 30 */
|
||
|
|
xmc[44] = (*c >> 5) & 0x7;
|
||
|
|
xmc[45] = (*c >> 2) & 0x7;
|
||
|
|
xmc[46] = (*c++ & 0x3) << 1;
|
||
|
|
xmc[46] |= (*c >> 7) & 0x1;
|
||
|
|
xmc[47] = (*c >> 4) & 0x7;
|
||
|
|
xmc[48] = (*c >> 1) & 0x7;
|
||
|
|
xmc[49] = (*c++ & 0x1) << 2;
|
||
|
|
xmc[49] |= (*c >> 6) & 0x3;
|
||
|
|
xmc[50] = (*c >> 3) & 0x7;
|
||
|
|
xmc[51] = *c & 0x7; /* 33 */
|
||
|
|
}
|
||
|
|
|
||
|
|
Gsm_Decoder(s, LARc, Nc, bc, Mc, xmaxc, xmc, target);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|