[f40a309] | 1 | /*
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| 2 | =============================================================================
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| 3 | ucslice.c -- update score display center slice
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| 4 | Version 7 -- 1988-09-28 -- D.N. Lynx Crowe
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| 5 | =============================================================================
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| 6 | */
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| 7 |
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| 8 | #undef DEBUGGER
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| 9 |
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[b28a12e] | 10 | #include "ram.h"
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[f40a309] | 11 |
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| 12 | /*
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| 13 | =============================================================================
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| 14 | ucslice()
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| 15 |
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| 16 | Updates the center slice.
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| 17 |
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| 18 | Note transitions are based on the value of global variable 'sd',
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| 19 | which is zero for forward, and non-zero for backward scrolling.
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| 20 |
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| 21 | Note colors come from 'gtctab[]'.
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| 22 |
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| 23 | This code must be very fast or the display bogs down the system.
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| 24 | =============================================================================
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| 25 | */
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| 26 |
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[0580615] | 27 | void ucslice(void)
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[f40a309] | 28 | {
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[8c8b4e5] | 29 | uint16_t *pxptr;
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| 30 | volatile uint16_t *slptr;
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| 31 | struct gdsel *gdsep;
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| 32 | int32_t lc;
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| 33 | uint16_t i, ncolor, mask1, mask2;
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[7258c6a] | 34 | uint16_t *ncptr, *nctabp;
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[f40a309] | 35 | struct gdsel **gdstp, *gdprv, *gdnxt;
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[7258c6a] | 36 | int16_t *lintab;
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[f40a309] | 37 |
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| 38 | DB_ENTR("ucslice()");
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| 39 |
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| 40 | lc = 128L;
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| 41 | mask1 = nbmasks[soffset];
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| 42 | mask2 = ~mask1;
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| 43 |
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| 44 | /* initialize note color, note control, and group control pointers */
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| 45 |
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| 46 | gdstp = gdstbc; /* group control table */
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| 47 | nctabp = sd ? nttab2 : nttab1; /* note transition table */
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| 48 | ncptr = gtctab; /* group to color table */
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| 49 |
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| 50 | lintab = (ac_code EQ N_SHARP) ? lintab1 : lintab2; /* line table */
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| 51 |
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| 52 | for (i = 0; i < 12; i++) { /* scan the group control table ... */
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| 53 |
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| 54 | ncolor = mask1 & *ncptr++; /* get note color mask */
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| 55 | gdprv = (struct gdsel *)gdstp; /* setup previous pointer */
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| 56 | gdsep = *gdstp++; /* setup current pointer */
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| 57 |
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| 58 | if (gdsep) { /* ... process each active group ... */
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| 59 |
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| 60 | do { /* ... for each note played by the group ... */
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| 61 |
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| 62 | if (ndisp EQ 2) { /* ... if display is up */
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| 63 |
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| 64 | /* setup slice and pixel pointers */
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| 65 |
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| 66 | slptr = saddr + 64L +
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[7258c6a] | 67 | ((int32_t)lintab[gdsep->note] << 7);
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[f40a309] | 68 |
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| 69 | pxptr = &pxtbl[gdsep->code][0];
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| 70 |
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| 71 | /* update the slice */
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| 72 |
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| 73 | *slptr = (*slptr & mask2) | (*pxptr++ & ncolor);
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| 74 | slptr += lc;
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| 75 |
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| 76 | *slptr = (*slptr & mask2) | (*pxptr++ & ncolor);
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| 77 | slptr += lc;
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| 78 |
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| 79 | *slptr = (*slptr & mask2) | (*pxptr++ & ncolor);
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| 80 |
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| 81 | }
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| 82 |
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| 83 | gdnxt = gdsep->next; /* set 'next element' pointer */
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| 84 |
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| 85 | /* update and check element code */
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| 86 |
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| 87 | if (0 EQ (gdsep->code = nctabp[gdsep->code])) {
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| 88 |
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| 89 | /* if it's zero, delete the element */
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| 90 |
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| 91 | gdprv->next = gdnxt;
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| 92 | gdsep->next = gdfsep;
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| 93 | gdfsep = gdsep;
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| 94 |
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| 95 | } else
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| 96 | gdprv = gdsep;
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| 97 |
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| 98 | gdsep = gdnxt; /* set pointer for next pass */
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| 99 |
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| 100 | } while (gdsep);
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| 101 | }
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| 102 | }
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| 103 |
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[fa38804] | 104 |
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[f40a309] | 105 | for (; i < NGDSEL; i++) {
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| 106 |
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| 107 | gdprv = (struct gdsel *)gdstp; /* setup previous pointer */
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| 108 | gdsep = *gdstp++; /* setup current pointer */
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| 109 |
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| 110 | if (gdsep) { /* ... process each active event priority ... */
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| 111 |
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| 112 | do { /* ... for each event of this priority ... */
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| 113 |
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| 114 | if (ndisp EQ 2) { /* ... if display is up */
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| 115 |
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| 116 | /* setup slice and pixel pointers */
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| 117 |
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| 118 | slptr = saddr + 27200L;
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| 119 | pxptr = &epxtbl[gdsep->code][0];
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| 120 |
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| 121 | /* get event color */
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| 122 |
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| 123 | ncolor = mask1 & gdsep->note;
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| 124 |
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| 125 | /* update the slice */
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| 126 |
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| 127 | if (*pxptr++) /* 212 */
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| 128 | *slptr = (*slptr & mask2) | ncolor;
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| 129 |
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| 130 | slptr += lc;
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| 131 |
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| 132 | if (*pxptr++) /* 213 */
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| 133 | *slptr = (*slptr & mask2) | ncolor;
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| 134 |
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| 135 | slptr += lc;
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| 136 |
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| 137 | if (*pxptr++) /* 214 */
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| 138 | *slptr = (*slptr & mask2) | ncolor;
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| 139 |
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| 140 | slptr += lc;
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| 141 |
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| 142 | if (*pxptr++) /* 215 */
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| 143 | *slptr = (*slptr & mask2) | ncolor;
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| 144 |
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| 145 | slptr += lc;
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| 146 |
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| 147 | if (*pxptr++) /* 216 */
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| 148 | *slptr = (*slptr & mask2) | ncolor;
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| 149 |
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| 150 | slptr += lc;
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| 151 |
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| 152 | if (*pxptr++) /* 217 */
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| 153 | *slptr = (*slptr & mask2) | ncolor;
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| 154 |
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| 155 | slptr += lc;
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[fa38804] | 156 |
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[f40a309] | 157 | if (*pxptr++) /* 218 */
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| 158 | *slptr = (*slptr & mask2) | ncolor;
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| 159 |
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| 160 | slptr += lc;
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| 161 |
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| 162 | if (*pxptr++) /* 219 */
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| 163 | *slptr = (*slptr & mask2) | ncolor;
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| 164 |
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| 165 | slptr += lc;
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| 166 |
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| 167 | if (*pxptr++) /* 220 */
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| 168 | *slptr = (*slptr & mask2) | ncolor;
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| 169 |
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| 170 | slptr += lc;
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| 171 |
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| 172 | if (*pxptr++) /* 221 */
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| 173 | *slptr = (*slptr & mask2) | ncolor;
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| 174 |
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| 175 | slptr += lc;
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| 176 |
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| 177 | if (*pxptr++) /* 222 */
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| 178 | *slptr = (*slptr & mask2) | ncolor;
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| 179 |
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| 180 | slptr += lc;
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| 181 |
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| 182 | if (*pxptr) /* 223 */
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| 183 | *slptr = (*slptr & mask2) | ncolor;
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| 184 | }
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| 185 |
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| 186 | gdnxt = gdsep->next; /* set next pointer */
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| 187 | gdprv->next = gdnxt; /* delete the element */
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| 188 | gdsep->next = gdfsep;
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| 189 | gdfsep = gdsep;
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| 190 | gdsep = gdnxt; /* set pointer for next pass */
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| 191 |
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| 192 | } while (gdsep);
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| 193 | }
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| 194 | }
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| 195 |
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| 196 | DB_EXIT("ucslice");
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| 197 | }
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[6262b5c] | 198 |
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