1 | /*
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2 | =============================================================================
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3 | delnote.c -- MIDAS-VII note deletion
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4 | Version 16 -- 1988-10-27 -- D.N. Lynx Crowe
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5 | =============================================================================
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6 | */
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7 |
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8 | #include "all.h"
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9 |
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10 | extern int16_t pix2mid(void);
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11 | extern int16_t sc_refr(int32_t t);
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12 |
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13 | #define TO_LFT (TO_BAK + 1)
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14 |
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15 | extern int16_t cflag; /* accidental flag */
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16 | extern int16_t cnote; /* note value at cursor */
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17 | extern int16_t cxval; /* cursor x value */
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18 | extern int16_t cyval; /* cursor y value */
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19 | extern int16_t lstflag; /* last note entry list end flag */
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20 | extern int16_t recsw; /* record status */
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21 |
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22 | extern int32_t ctime; /* time at cursor */
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23 |
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24 | extern int16_t grpmode[12]; /* group record modes */
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25 | extern int16_t grpstat[12]; /* group status */
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26 | /* |
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27 |
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28 | */
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29 |
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30 | /*
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31 | =============================================================================
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32 | delnote() -- delete a note
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33 | =============================================================================
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34 | */
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35 |
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36 | int16_t delnote(void)
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37 | {
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38 | register struct n_entry *bp, *cp, *ep;
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39 | register int32_t t_left;
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40 | register int16_t tnote, grp;
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41 | register int16_t runtag, scantag;
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42 | int16_t disptag;
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43 |
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44 | disptag = FALSE; /* nothing changed yet */
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45 |
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46 | if (NOT recsw) /* must be in record mode */
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47 | return(FAILURE);
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48 |
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49 | /* convert cursor position to note number and time */
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50 |
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51 | if (pix2mid())
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52 | goto notnote;
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53 |
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54 | ++cflag;
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55 | tnote = cnote;
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56 | t_left = t_cur - TO_LFT;
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57 | cp = (struct n_entry *)frfind(ctime, 0);
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58 |
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59 | /* |
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60 |
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61 | */
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62 | while (cflag--) { /* handle both naturals and accidentals */
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63 |
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64 | for (grp = 0; grp < 12; grp++) { /* for each group ... */
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65 |
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66 | if ((grpstat[grp] EQ 0) OR /* ... enabled and ... */
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67 | (grpmode[grp] NE 2)) /* ... in record mode: */
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68 | continue;
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69 |
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70 | runtag = TRUE;
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71 | bp = cp; /* start at cursor */
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72 |
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73 | while (runtag) { /* scan left from cursor until: */
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74 |
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75 | if ((bp->e_time LT t_left) OR
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76 | (bp->e_type EQ EV_SCORE)) { /* left edge */
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77 |
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78 | /* done -- nothing to delete */
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79 |
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80 | runtag = FALSE;
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81 | continue;
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82 | /* |
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83 |
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84 | */
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85 | } else if ((bp->e_type EQ EV_NEND) AND
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86 | (bp->e_note EQ tnote) AND
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87 | (bp->e_group EQ grp)) { /* note end */
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88 |
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89 | /* done -- overlap */
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90 |
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91 | runtag = FALSE;
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92 | continue;
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93 | /* |
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94 |
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95 | */
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96 |
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97 | } else if ((bp->e_type EQ EV_NBEG) AND
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98 | (bp->e_note EQ tnote) AND
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99 | (bp->e_group EQ grp)) { /* note begin */
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100 |
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101 | /* possible deletion */
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102 |
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103 | /* scan right from note begin until: */
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104 |
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105 | ep = bp->e_fwd;
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106 | scantag = TRUE;
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107 |
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108 | while (scantag) {
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109 |
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110 | /* note begin -- done -- overlap */
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111 |
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112 | if ((ep->e_type EQ EV_NBEG) AND
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113 | (ep->e_note EQ tnote) AND
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114 | (ep->e_group EQ grp)) {
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115 |
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116 | scantag = FALSE;
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117 | runtag = FALSE;
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118 | continue;
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119 | /* |
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120 |
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121 | */
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122 |
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123 | } else if ((ep->e_type EQ EV_NEND) AND
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124 | (ep->e_note EQ tnote) AND
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125 | (ep->e_group EQ grp)) {
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126 |
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127 | /* note end */
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128 |
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129 | /* delete note end */
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130 |
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131 | if (cp EQ ep)
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132 | cp = cp->e_bak;
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133 |
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134 | if (p_ctr EQ ep)
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135 | p_ctr = p_ctr->e_bak;
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136 |
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137 | if (p_bak EQ ep)
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138 | p_bak = p_bak->e_bak;
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139 |
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140 | if (p_fwd EQ ep)
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141 | p_fwd = p_fwd->e_bak;
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142 |
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143 | if (p_cur EQ ep)
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144 | p_cur = p_cur->e_bak;
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145 |
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146 | e_del(e_rmv(ep));
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147 | /* |
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148 |
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149 | */
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150 |
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151 | /* delete note begin */
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152 |
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153 | if (cp EQ bp)
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154 | cp = cp->e_bak;
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155 |
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156 | if (p_ctr EQ bp)
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157 | p_ctr = p_ctr->e_bak;
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158 |
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159 | if (p_bak EQ bp)
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160 | p_bak = p_bak->e_bak;
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161 |
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162 | if (p_fwd EQ bp)
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163 | p_fwd = p_fwd->e_bak;
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164 |
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165 | if (p_cur EQ bp)
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166 | p_cur = p_cur->e_bak;
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167 |
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168 | e_del(e_rmv(bp));
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169 |
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170 | disptag = TRUE;
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171 | runtag = FALSE;
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172 | scantag = FALSE;
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173 | continue;
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174 | /* |
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175 |
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176 | */
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177 |
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178 | } else if (ep->e_type EQ EV_FINI) {
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179 |
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180 | /* score end */
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181 |
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182 | /* delete note begin */
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183 |
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184 | if (cp EQ bp)
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185 | cp = cp->e_bak;
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186 |
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187 | if (p_ctr EQ bp)
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188 | p_ctr = p_ctr->e_bak;
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189 |
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190 | if (p_bak EQ bp)
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191 | p_bak = p_bak->e_bak;
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192 |
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193 | if (p_fwd EQ bp)
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194 | p_fwd = p_fwd->e_bak;
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195 |
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196 | if (p_cur EQ bp)
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197 | p_cur = p_cur->e_bak;
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198 |
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199 | e_del(e_rmv(bp));
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200 |
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201 | disptag = TRUE;
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202 | runtag = FALSE;
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203 | scantag = FALSE;
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204 | continue;
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205 | }
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206 |
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207 | /* scan right */
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208 |
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209 | ep = ep->e_fwd;
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210 |
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211 | } /* end while (scantag) */
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212 |
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213 | } /* end if */
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214 | /* |
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215 |
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216 | */
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217 |
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218 | /* scan left */
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219 |
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220 | bp = bp->e_bak;
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221 |
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222 | } /* end while (runtag) */
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223 |
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224 | } /* end for (grp) */
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225 |
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226 | /* handle accidentals */
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227 |
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228 | if (ac_code EQ N_SHARP)
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229 | ++tnote; /* treat accidentals as sharps */
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230 | else
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231 | --tnote; /* treat accidentals as flats */
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232 |
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233 | } /* end while (cflag) */
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234 |
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235 |
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236 | /* |
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237 |
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238 | */
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239 |
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240 | notnote: /* jumped to if pix2mid() returned FAILURE (not on a note) */
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241 |
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242 | /* check for a bar marker delete operation */
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243 |
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244 | if (NOT disptag) { /* if no notes were deleted, try for a bar */
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245 |
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246 | if (ctime < 0L) /* time has to be good */
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247 | return(FAILURE);
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248 |
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249 | /* search current time for a bar marker - delete any found */
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250 |
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251 | ep = ep_adj(p_cur, 1, ctime);
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252 |
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253 | while (ctime EQ ep->e_time) {
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254 |
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255 | bp = ep->e_fwd;
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256 |
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257 | if (EV_BAR EQ ep->e_type) {
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258 |
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259 | if (ep EQ p_bak)
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260 | p_bak = p_bak->e_bak;
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261 |
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262 | if (ep EQ p_ctr)
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263 | p_ctr = p_ctr->e_bak;
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264 |
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265 | if (ep EQ p_cur)
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266 | p_cur = p_cur->e_bak;
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267 |
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268 | if (ep EQ p_fwd)
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269 | p_fwd = p_fwd->e_bak;
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270 |
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271 | e_del(e_rmv(ep));
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272 | disptag = TRUE;
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273 | }
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274 |
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275 | ep = bp;
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276 | }
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277 | }
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278 |
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279 | if (disptag)
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280 | sc_refr(t_cur);
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281 |
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282 | return(disptag ? SUCCESS : FAILURE);
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283 | }
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284 |
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