Mercurial > hg > xmms-sid
annotate src/xs_length.c @ 359:b1a858b8cb1a
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author | Matti Hamalainen <ccr@tnsp.org> |
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date | Mon, 07 Nov 2005 09:50:04 +0000 |
parents | 961212302eb9 |
children | 4611f1194941 |
rev | line source |
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4 | 1 /* |
2 XMMS-SID - SIDPlay input plugin for X MultiMedia System (XMMS) | |
3 | |
332 | 4 Get song length from SLDB for PSID/RSID files |
4 | 5 |
324 | 6 Programmed and designed by Matti 'ccr' Hamalainen <ccr@tnsp.org> |
7 (C) Copyright 1999-2005 Tecnic Software productions (TNSP) | |
4 | 8 |
9 This program is free software; you can redistribute it and/or modify | |
10 it under the terms of the GNU General Public License as published by | |
11 the Free Software Foundation; either version 2 of the License, or | |
12 (at your option) any later version. | |
13 | |
14 This program is distributed in the hope that it will be useful, | |
15 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 GNU General Public License for more details. | |
18 | |
19 You should have received a copy of the GNU General Public License | |
20 along with this program; if not, write to the Free Software | |
21 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
22 */ | |
39 | 23 #include "xs_length.h" |
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24 #include "xs_support.h" |
230 | 25 #include "xs_config.h" |
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26 #include <stdio.h> |
4 | 27 #include <stdlib.h> |
28 #include <ctype.h> | |
29 #include <string.h> | |
30 | |
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31 |
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32 /* Database handling functions |
4 | 33 */ |
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34 static t_xs_sldb_node *xs_sldb_node_new(void) |
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35 { |
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36 t_xs_sldb_node *pResult; |
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37 |
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38 /* Allocate memory for new node */ |
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39 pResult = (t_xs_sldb_node *) g_malloc0(sizeof(t_xs_sldb_node)); |
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40 if (!pResult) |
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41 return NULL; |
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42 |
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43 return pResult; |
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44 } |
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45 |
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46 |
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47 static void xs_sldb_node_free(t_xs_sldb_node * pNode) |
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48 { |
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49 if (pNode) { |
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50 /* Nothing much to do here ... */ |
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51 g_free(pNode); |
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52 } |
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53 } |
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54 |
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55 |
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56 /* Insert given node to db linked list |
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57 */ |
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58 static void xs_sldb_node_insert(t_xs_sldb * db, t_xs_sldb_node * pNode) |
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59 { |
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60 assert(db); |
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61 |
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62 if (db->pNodes) { |
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63 /* The first node's pPrev points to last node */ |
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64 LPREV = db->pNodes->pPrev; /* New node's prev = Previous last node */ |
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65 db->pNodes->pPrev->pNext = pNode; /* Previous last node's next = New node */ |
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66 db->pNodes->pPrev = pNode; /* New last node = New node */ |
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67 LNEXT = NULL; /* But next is NULL! */ |
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68 } else { |
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69 db->pNodes = pNode; /* First node ... */ |
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70 LPREV = pNode; /* ... it's also last */ |
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71 LNEXT = NULL; /* But next is NULL! */ |
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72 } |
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73 } |
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74 |
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75 |
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76 /* Parses a time-entry in SLDB format |
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77 */ |
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78 static gint32 xs_sldb_gettime(gchar * pcStr, size_t * piPos) |
4 | 79 { |
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80 gint32 iResult, iTemp; |
4 | 81 |
359
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82 /* Check if it starts with a digit */ |
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83 if (isdigit(pcStr[*piPos])) { |
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84 /* Get minutes-field */ |
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85 iResult = 0; |
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86 while (isdigit(pcStr[*piPos])) |
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87 iResult = (iResult * 10) + (pcStr[(*piPos)++] - '0'); |
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88 |
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89 iResult *= 60; |
4 | 90 |
359
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91 /* Check the field separator char */ |
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92 if (pcStr[*piPos] == ':') { |
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93 /* Get seconds-field */ |
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94 (*piPos)++; |
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95 iTemp = 0; |
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96 while (isdigit(pcStr[*piPos])) |
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97 iTemp = (iTemp * 10) + (pcStr[(*piPos)++] - '0'); |
4 | 98 |
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99 iResult += iTemp; |
4 | 100 } else |
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101 iResult = -2; |
4 | 102 } else |
359
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103 iResult = -1; |
4 | 104 |
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105 /* Ignore and skip the possible attributes */ |
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106 while (pcStr[*piPos] && !isspace(pcStr[*piPos])) |
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107 (*piPos)++; |
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108 |
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109 return iResult; |
4 | 110 } |
111 | |
112 | |
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113 /* Read database to memory |
4 | 114 */ |
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115 gint xs_sldb_read(t_xs_sldb * db, gchar * dbFilename) |
4 | 116 { |
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117 FILE *inFile; |
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118 gchar inLine[XS_BUF_SIZE]; |
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119 size_t lineNum, linePos; |
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120 gboolean iOK; |
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121 t_xs_sldb_node *tmpNode; |
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122 assert(db); |
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123 |
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124 /* Try to open the file */ |
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125 if ((inFile = fopen(dbFilename, "ra")) == NULL) { |
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126 XSERR("Could not open SongLengthDB '%s'\n", dbFilename); |
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127 return -1; |
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128 } |
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129 |
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130 /* Read and parse the data */ |
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131 lineNum = 0; |
4 | 132 |
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133 while (!feof(inFile)) { |
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134 fgets(inLine, XS_BUF_SIZE, inFile); |
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135 inLine[XS_BUF_SIZE - 1] = 0; |
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136 lineNum++; |
4 | 137 |
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138 /* Check if it is datafield */ |
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139 if (isxdigit(inLine[0])) { |
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140 /* Check the length of the hash */ |
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141 linePos = 0; |
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142 while (isxdigit(inLine[linePos])) |
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143 linePos++; |
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144 |
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145 if (linePos != XS_MD5HASH_LENGTH_CH) { |
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146 XSERR("Invalid hash in SongLengthDB file '%s' line #%d!\n", dbFilename, lineNum); |
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147 } else { |
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148 /* Allocate new node */ |
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149 if ((tmpNode = xs_sldb_node_new()) == NULL) { |
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150 XSERR("Error allocating new node. Fatal error.\n"); |
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151 exit(5); |
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152 } |
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153 |
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154 /* Get hash value */ |
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155 #if (XS_MD5HASH_LENGTH != 16) |
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156 #error Mismatch in hashcode length. Fix here. |
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157 #endif |
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158 sscanf(&inLine[0], "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", |
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159 (guint *) & (tmpNode->md5Hash[0]), (guint *) & (tmpNode->md5Hash[1]), |
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160 (guint *) & (tmpNode->md5Hash[2]), (guint *) & (tmpNode->md5Hash[3]), |
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161 (guint *) & (tmpNode->md5Hash[4]), (guint *) & (tmpNode->md5Hash[5]), |
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162 (guint *) & (tmpNode->md5Hash[6]), (guint *) & (tmpNode->md5Hash[7]), |
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163 (guint *) & (tmpNode->md5Hash[8]), (guint *) & (tmpNode->md5Hash[9]), |
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164 (guint *) & (tmpNode->md5Hash[10]), (guint *) & (tmpNode->md5Hash[11]), |
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165 (guint *) & (tmpNode->md5Hash[12]), (guint *) & (tmpNode->md5Hash[13]), |
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166 (guint *) & (tmpNode->md5Hash[14]), (guint *) & (tmpNode->md5Hash[15])); |
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167 |
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168 /* Get playtimes */ |
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169 if (inLine[linePos] != 0) { |
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170 if (inLine[linePos] != '=') { |
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171 XSERR("'=' expected in SongLengthDB file '%s' line #%d, column #%d\n", |
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172 dbFilename, lineNum, linePos); |
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173 |
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174 xs_sldb_node_free(tmpNode); |
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175 } else { |
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176 /* First playtime is after '=' */ |
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177 linePos++; |
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178 iOK = TRUE; |
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179 |
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180 while ((linePos < strlen(inLine)) && iOK) { |
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181 xs_findnext(inLine, &linePos); |
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182 |
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183 if (tmpNode->nLengths < XS_STIL_MAXENTRY) { |
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184 tmpNode->sLengths[tmpNode->nLengths] = |
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185 xs_sldb_gettime(inLine, &linePos); |
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186 tmpNode->nLengths++; |
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187 } else |
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188 iOK = FALSE; |
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189 } |
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190 |
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191 /* Add an node to db in memory */ |
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192 if (iOK) |
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193 xs_sldb_node_insert(db, tmpNode); |
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194 else |
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195 xs_sldb_node_free(tmpNode); |
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196 } |
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197 } |
4 | 198 } |
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199 } else if ((inLine[0] != ';') && (inLine[0] != '[')) { |
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200 XSERR("Invalid line in SongLengthDB file '%s' line #%d\n", dbFilename, lineNum); |
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201 } |
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202 |
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203 } /* while */ |
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205 /* Close the file */ |
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206 fclose(inFile); |
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208 return 0; |
4 | 209 } |
210 | |
211 | |
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212 /* Compare two given MD5-hashes. |
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213 * Return: 0 if equal |
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214 * negative if testHash1 < testHash2 |
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215 * positive if testHash1 > testHash2 |
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216 */ |
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217 static gint xs_sldb_cmphash(t_xs_md5hash testHash1, t_xs_md5hash testHash2) |
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218 { |
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219 register gint i, res = 0; |
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220 |
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221 /* Compute difference of hashes */ |
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222 for (i = 0; (i < XS_MD5HASH_LENGTH) && (!res); i++) |
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223 res = (testHash1[i] - testHash2[i]); |
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224 |
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225 return res; |
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226 } |
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227 |
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228 |
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229 /* Get node from db index via binary search |
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230 */ |
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231 static t_xs_sldb_node *xs_sldb_get_node(t_xs_sldb * db, t_xs_md5hash pHash) |
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232 { |
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233 gint iStartNode, iEndNode, iQNode, r, i; |
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234 gboolean iFound; |
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235 t_xs_sldb_node *pResult; |
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236 |
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237 /* Check the database pointers */ |
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238 if (!db || !db->pNodes || !db->ppIndex) |
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239 return NULL; |
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240 |
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241 /* Look-up via index using binary search */ |
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242 pResult = NULL; |
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243 iStartNode = 0; |
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244 iEndNode = (db->n - 1); |
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245 iQNode = (iEndNode / 2); |
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246 iFound = FALSE; |
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247 |
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248 while ((!iFound) && ((iEndNode - iStartNode) > 128)) { |
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249 r = xs_sldb_cmphash(pHash, db->ppIndex[iQNode]->md5Hash); |
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250 if (r < 0) { |
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251 /* Hash was in the <- LEFT side */ |
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252 iEndNode = iQNode; |
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253 iQNode = iStartNode + ((iEndNode - iStartNode) / 2); |
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254 } else if (r > 0) { |
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255 /* Hash was in the RIGHT -> side */ |
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256 iStartNode = iQNode; |
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257 iQNode = iStartNode + ((iEndNode - iStartNode) / 2); |
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258 } else |
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259 iFound = TRUE; |
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260 } |
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261 |
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262 /* If not found already */ |
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263 if (!iFound) { |
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264 /* Search the are linearly */ |
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265 iFound = FALSE; |
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266 i = iStartNode; |
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267 while ((i <= iEndNode) && (!iFound)) { |
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268 if (xs_sldb_cmphash(pHash, db->ppIndex[i]->md5Hash) == 0) |
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269 iFound = TRUE; |
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270 else |
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271 i++; |
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272 } |
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273 |
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274 /* Check the result */ |
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275 if (iFound) |
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276 pResult = db->ppIndex[i]; |
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277 |
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278 } else { |
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279 /* Found via binary search */ |
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280 pResult = db->ppIndex[iQNode]; |
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281 } |
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282 |
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283 return pResult; |
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284 } |
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285 |
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286 |
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287 /* Compare two nodes |
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288 */ |
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289 static gint xs_sldb_cmp(const void *pNode1, const void *pNode2) |
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290 { |
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291 /* We assume here that we never ever get NULL-pointers or similar */ |
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292 return xs_sldb_cmphash((*(t_xs_sldb_node **) pNode1)->md5Hash, (*(t_xs_sldb_node **) pNode2)->md5Hash); |
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293 } |
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294 |
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295 |
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296 /* (Re)create index |
4 | 297 */ |
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298 gint xs_sldb_index(t_xs_sldb * db) |
4 | 299 { |
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300 t_xs_sldb_node *pCurr; |
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301 gint i; |
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302 assert(db); |
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303 |
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304 /* Free old index */ |
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305 if (db->ppIndex) { |
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306 g_free(db->ppIndex); |
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307 db->ppIndex = NULL; |
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308 } |
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309 |
359
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310 /* Get size of db */ |
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311 pCurr = db->pNodes; |
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312 db->n = 0; |
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313 while (pCurr) { |
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314 db->n++; |
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315 pCurr = pCurr->pNext; |
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316 } |
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317 |
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318 /* Check number of nodes */ |
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319 if (db->n > 0) { |
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320 /* Allocate memory for index-table */ |
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321 db->ppIndex = (t_xs_sldb_node **) g_malloc(sizeof(t_xs_sldb_node *) * db->n); |
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322 if (!db->ppIndex) |
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323 return -1; |
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324 |
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325 /* Get node-pointers to table */ |
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326 i = 0; |
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327 pCurr = db->pNodes; |
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328 while (pCurr && (i < db->n)) { |
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329 db->ppIndex[i++] = pCurr; |
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330 pCurr = pCurr->pNext; |
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331 } |
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332 |
359
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333 /* Sort the indexes */ |
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334 qsort(db->ppIndex, db->n, sizeof(t_xs_sldb_node *), xs_sldb_cmp); |
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335 } |
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336 |
359
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337 return 0; |
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338 } |
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339 |
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340 |
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341 /* Free a given song-length database |
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342 */ |
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343 void xs_sldb_free(t_xs_sldb * db) |
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344 { |
359
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345 t_xs_sldb_node *pCurr, *pNext; |
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346 |
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347 if (!db) |
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348 return; |
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349 |
359
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350 /* Free the memory allocated for nodes */ |
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351 pCurr = db->pNodes; |
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352 while (pCurr) { |
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353 pNext = pCurr->pNext; |
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354 xs_sldb_node_free(pCurr); |
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355 pCurr = pNext; |
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356 } |
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357 |
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358 db->pNodes = NULL; |
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359 |
359
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360 /* Free memory allocated for index */ |
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361 if (db->ppIndex) { |
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362 g_free(db->ppIndex); |
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363 db->ppIndex = NULL; |
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364 } |
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365 |
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366 /* Free structure */ |
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367 db->n = 0; |
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368 g_free(db); |
4 | 369 } |
370 | |
371 | |
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372 /* Compute md5hash of given SID-file |
4 | 373 */ |
359
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374 typedef struct |
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375 { |
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376 gchar magicID[4]; /* "PSID" / "RSID" magic identifier */ |
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377 guint16 version, /* Version number */ |
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378 dataOffset, /* Start of actual c64 data in file */ |
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379 loadAddress, /* Loading address */ |
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380 initAddress, /* Initialization address */ |
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381 playAddress, /* Play one frame */ |
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382 nSongs, /* Number of subsongs */ |
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383 startSong; /* Default starting song */ |
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384 guint32 speed; /* Speed */ |
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385 gchar sidName[32]; /* Descriptive text-fields, ASCIIZ */ |
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386 gchar sidAuthor[32]; |
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387 gchar sidCopyright[32]; |
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388 } t_xs_psidv1_header; |
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389 |
4 | 390 |
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391 typedef struct |
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392 { |
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393 guint16 flags; /* Flags */ |
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394 guint8 startPage, pageLength; |
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395 guint16 reserved; |
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396 } t_xs_psidv2_header; |
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397 |
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398 |
359
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399 static gint xs_get_sid_hash(gchar * pcFilename, t_xs_md5hash hash) |
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400 { |
359
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401 FILE *inFile; |
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402 t_xs_md5state inState; |
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403 t_xs_psidv1_header psidH; |
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404 t_xs_psidv2_header psidH2; |
241
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405 #ifdef XS_BUF_DYNAMIC |
359
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406 guint8 *songData; |
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407 #else |
359
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408 guint8 songData[XS_SIDBUF_SIZE]; |
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409 #endif |
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410 guint8 ib8[2], i8; |
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411 gint iIndex, iRes; |
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412 |
359
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413 /* Try to open the file */ |
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414 if ((inFile = fopen(pcFilename, "rb")) == NULL) |
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415 return -1; |
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416 |
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417 /* Read PSID header in */ |
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418 xs_rd_str(inFile, psidH.magicID, sizeof(psidH.magicID)); |
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419 if ((psidH.magicID[0] != 'P' && psidH.magicID[0] != 'R') || |
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420 (psidH.magicID[1] != 'S') || (psidH.magicID[2] != 'I') || (psidH.magicID[3] != 'D')) { |
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421 fclose(inFile); |
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422 return -2; |
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423 } |
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424 |
359
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425 psidH.version = xs_rd_be16(inFile); |
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426 psidH.dataOffset = xs_rd_be16(inFile); |
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427 psidH.loadAddress = xs_rd_be16(inFile); |
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428 psidH.initAddress = xs_rd_be16(inFile); |
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429 psidH.playAddress = xs_rd_be16(inFile); |
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430 psidH.nSongs = xs_rd_be16(inFile); |
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431 psidH.startSong = xs_rd_be16(inFile); |
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432 psidH.speed = xs_rd_be32(inFile); |
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433 |
359
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434 xs_rd_str(inFile, psidH.sidName, sizeof(psidH.sidName)); |
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435 xs_rd_str(inFile, psidH.sidAuthor, sizeof(psidH.sidAuthor)); |
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436 xs_rd_str(inFile, psidH.sidCopyright, sizeof(psidH.sidCopyright)); |
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437 |
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438 /* Check if we need to load PSIDv2NG header ... */ |
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439 if (psidH.version == 2) { |
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440 /* Yes, we need to */ |
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441 psidH2.flags = xs_rd_be16(inFile); |
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442 psidH2.startPage = fgetc(inFile); |
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443 psidH2.pageLength = fgetc(inFile); |
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444 psidH2.reserved = xs_rd_be16(inFile); |
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445 } |
241
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446 #ifdef XS_BUF_DYNAMIC |
359
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447 /* Allocate buffer */ |
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448 songData = (guint8 *) g_malloc(XS_SIDBUF_SIZE * sizeof(guint8)); |
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449 if (!songData) { |
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450 fclose(inFile); |
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451 return -3; |
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452 } |
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453 #endif |
359
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454 |
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455 /* Read data to buffer */ |
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456 iRes = fread(songData, sizeof(guint8), XS_SIDBUF_SIZE, inFile); |
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457 fclose(inFile); |
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458 |
359
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459 /* Initialize and start MD5-hash calculation */ |
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460 xs_md5_init(&inState); |
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461 if (psidH.loadAddress == 0) { |
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462 /* Strip load address (2 first bytes) */ |
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463 xs_md5_append(&inState, &songData[2], iRes - 2); |
227
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464 } else { |
359
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465 /* Append "as is" */ |
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466 xs_md5_append(&inState, songData, iRes); |
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467 } |
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468 |
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469 |
241
291715a519e2
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470 #ifdef XS_BUF_DYNAMIC |
359
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471 /* Free buffer */ |
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472 g_free(songData); |
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473 #endif |
87
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Various fixes and improvements
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474 |
359
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475 /* Append header data to hash */ |
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476 #define XSADDHASH(QDATAB) { ib8[0] = (QDATAB & 0xff); ib8[1] = (QDATAB >> 8); xs_md5_append(&inState, (guint8 *) &ib8, sizeof(ib8)); } |
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477 |
359
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478 XSADDHASH(psidH.initAddress) |
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479 XSADDHASH(psidH.playAddress) |
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480 XSADDHASH(psidH.nSongs) |
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481 #undef XSADDHASH |
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482 /* Append song speed data to hash */ |
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483 i8 = 0; |
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484 for (iIndex = 0; (iIndex < psidH.nSongs) && (iIndex < 32); iIndex++) { |
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485 i8 = (psidH.speed & (1 << iIndex)) ? 60 : 0; |
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486 xs_md5_append(&inState, &i8, sizeof(i8)); |
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487 } |
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488 |
359
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489 /* Rest of songs (more than 32) */ |
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490 for (iIndex = 32; iIndex < psidH.nSongs; iIndex++) { |
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491 xs_md5_append(&inState, &i8, sizeof(i8)); |
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492 } |
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493 |
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494 |
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495 /* PSIDv2NG specific */ |
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496 if (psidH.version == 2) { |
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497 /* SEE SIDPLAY HEADERS FOR INFO */ |
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498 i8 = (psidH2.flags >> 2) & 3; |
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499 if (i8 == 2) |
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500 xs_md5_append(&inState, &i8, sizeof(i8)); |
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501 } |
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|
502 |
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503 /* Calculate the hash */ |
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504 xs_md5_finish(&inState, hash); |
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505 |
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506 return 0; |
14
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507 } |
4 | 508 |
509 | |
227
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510 /* Get song lengths |
4 | 511 */ |
359
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512 t_xs_sldb_node *xs_sldb_get(t_xs_sldb * db, gchar * pcFilename) |
4 | 513 { |
359
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514 t_xs_sldb_node *pResult; |
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515 t_xs_md5hash dbHash; |
4 | 516 |
359
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517 /* Get the hash and then look up from db */ |
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518 if (xs_get_sid_hash(pcFilename, dbHash) == 0) |
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519 pResult = xs_sldb_get_node(db, dbHash); |
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520 else |
359
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521 pResult = NULL; |
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522 |
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523 return pResult; |
4 | 524 } |
230 | 525 |
526 | |
527 /* | |
528 * These should be moved out of this module some day ... | |
529 */ | |
359
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530 static t_xs_sldb *xs_sldb_db = NULL; |
230 | 531 XS_MUTEX(xs_sldb_db); |
532 | |
533 gint xs_songlen_init(void) | |
534 { | |
359
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535 XS_MUTEX_LOCK(xs_cfg); |
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536 |
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537 if (!xs_cfg.songlenDBPath) { |
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538 XS_MUTEX_UNLOCK(xs_cfg); |
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539 return -1; |
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540 } |
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541 |
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542 XS_MUTEX_LOCK(xs_sldb_db); |
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543 |
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544 /* Check if already initialized */ |
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545 if (xs_sldb_db) |
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546 xs_sldb_free(xs_sldb_db); |
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547 |
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548 /* Allocate database */ |
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549 xs_sldb_db = (t_xs_sldb *) g_malloc0(sizeof(t_xs_sldb)); |
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550 if (!xs_sldb_db) { |
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551 XS_MUTEX_UNLOCK(xs_cfg); |
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552 XS_MUTEX_UNLOCK(xs_sldb_db); |
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553 return -2; |
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554 } |
230 | 555 |
359
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556 /* Read the database */ |
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557 if (xs_sldb_read(xs_sldb_db, xs_cfg.songlenDBPath) != 0) { |
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558 xs_sldb_free(xs_sldb_db); |
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559 xs_sldb_db = NULL; |
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560 XS_MUTEX_UNLOCK(xs_cfg); |
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561 XS_MUTEX_UNLOCK(xs_sldb_db); |
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562 return -3; |
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563 } |
230 | 564 |
359
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565 /* Create index */ |
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566 if (xs_sldb_index(xs_sldb_db) != 0) { |
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567 xs_sldb_free(xs_sldb_db); |
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568 xs_sldb_db = NULL; |
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569 XS_MUTEX_UNLOCK(xs_cfg); |
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570 XS_MUTEX_UNLOCK(xs_sldb_db); |
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571 return -4; |
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572 } |
230 | 573 |
359
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574 XS_MUTEX_UNLOCK(xs_cfg); |
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575 XS_MUTEX_UNLOCK(xs_sldb_db); |
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576 return 0; |
230 | 577 } |
578 | |
579 | |
580 void xs_songlen_close(void) | |
581 { | |
359
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582 XS_MUTEX_LOCK(xs_sldb_db); |
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583 xs_sldb_free(xs_sldb_db); |
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584 xs_sldb_db = NULL; |
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585 XS_MUTEX_UNLOCK(xs_sldb_db); |
230 | 586 } |
587 | |
588 | |
359
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589 t_xs_sldb_node *xs_songlen_get(gchar * pcFilename) |
230 | 590 { |
359
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591 t_xs_sldb_node *pResult; |
230 | 592 |
359
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593 XS_MUTEX_LOCK(xs_sldb_db); |
230 | 594 |
359
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595 if (xs_cfg.songlenDBEnable && xs_sldb_db) |
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596 pResult = xs_sldb_get(xs_sldb_db, pcFilename); |
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597 else |
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598 pResult = NULL; |
230 | 599 |
359
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600 XS_MUTEX_UNLOCK(xs_sldb_db); |
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601 |
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602 return pResult; |
230 | 603 } |