Mercurial > hg > xmms-sid
annotate src/xs_length.c @ 385:7dc7e7dbbf90
Indentation fixes.
author | Matti Hamalainen <ccr@tnsp.org> |
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date | Sun, 22 Jan 2006 20:48:02 +0000 |
parents | 4611f1194941 |
children | 3c239e4160d5 |
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; |
385 | 96 while (isdigit(pcStr[*piPos])) { |
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97 iTemp = (iTemp * 10) + (pcStr[(*piPos)++] - '0'); |
385 | 98 } |
4 | 99 |
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100 iResult += iTemp; |
4 | 101 } else |
359
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102 iResult = -2; |
4 | 103 } else |
359
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104 iResult = -1; |
4 | 105 |
359
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106 /* Ignore and skip the possible attributes */ |
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107 while (pcStr[*piPos] && !isspace(pcStr[*piPos])) |
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108 (*piPos)++; |
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109 |
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110 return iResult; |
4 | 111 } |
112 | |
113 | |
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114 /* Read database to memory |
4 | 115 */ |
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116 gint xs_sldb_read(t_xs_sldb * db, gchar * dbFilename) |
4 | 117 { |
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118 FILE *inFile; |
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119 gchar inLine[XS_BUF_SIZE]; |
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120 size_t lineNum, linePos; |
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121 gboolean iOK; |
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122 t_xs_sldb_node *tmpNode; |
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123 assert(db); |
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124 |
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125 /* Try to open the file */ |
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126 if ((inFile = fopen(dbFilename, "ra")) == NULL) { |
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127 XSERR("Could not open SongLengthDB '%s'\n", dbFilename); |
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128 return -1; |
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129 } |
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130 |
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131 /* Read and parse the data */ |
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132 lineNum = 0; |
4 | 133 |
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134 while (!feof(inFile)) { |
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135 fgets(inLine, XS_BUF_SIZE, inFile); |
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136 inLine[XS_BUF_SIZE - 1] = 0; |
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137 lineNum++; |
4 | 138 |
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139 /* Check if it is datafield */ |
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140 if (isxdigit(inLine[0])) { |
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141 /* Check the length of the hash */ |
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142 linePos = 0; |
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143 while (isxdigit(inLine[linePos])) |
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144 linePos++; |
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145 |
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146 if (linePos != XS_MD5HASH_LENGTH_CH) { |
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147 XSERR("Invalid hash in SongLengthDB file '%s' line #%d!\n", dbFilename, lineNum); |
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148 } else { |
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149 /* Allocate new node */ |
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150 if ((tmpNode = xs_sldb_node_new()) == NULL) { |
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151 XSERR("Error allocating new node. Fatal error.\n"); |
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152 exit(5); |
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153 } |
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154 |
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155 /* Get hash value */ |
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156 #if (XS_MD5HASH_LENGTH != 16) |
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157 #error Mismatch in hashcode length. Fix here. |
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158 #endif |
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159 sscanf(&inLine[0], "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", |
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160 (guint *) & (tmpNode->md5Hash[0]), (guint *) & (tmpNode->md5Hash[1]), |
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161 (guint *) & (tmpNode->md5Hash[2]), (guint *) & (tmpNode->md5Hash[3]), |
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162 (guint *) & (tmpNode->md5Hash[4]), (guint *) & (tmpNode->md5Hash[5]), |
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163 (guint *) & (tmpNode->md5Hash[6]), (guint *) & (tmpNode->md5Hash[7]), |
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164 (guint *) & (tmpNode->md5Hash[8]), (guint *) & (tmpNode->md5Hash[9]), |
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165 (guint *) & (tmpNode->md5Hash[10]), (guint *) & (tmpNode->md5Hash[11]), |
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166 (guint *) & (tmpNode->md5Hash[12]), (guint *) & (tmpNode->md5Hash[13]), |
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167 (guint *) & (tmpNode->md5Hash[14]), (guint *) & (tmpNode->md5Hash[15])); |
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168 |
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169 /* Get playtimes */ |
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170 if (inLine[linePos] != 0) { |
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171 if (inLine[linePos] != '=') { |
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172 XSERR("'=' expected in SongLengthDB file '%s' line #%d, column #%d\n", |
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173 dbFilename, lineNum, linePos); |
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174 |
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175 xs_sldb_node_free(tmpNode); |
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176 } else { |
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177 /* First playtime is after '=' */ |
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178 linePos++; |
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179 iOK = TRUE; |
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180 |
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181 while ((linePos < strlen(inLine)) && iOK) { |
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182 xs_findnext(inLine, &linePos); |
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183 |
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184 if (tmpNode->nLengths < XS_STIL_MAXENTRY) { |
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185 tmpNode->sLengths[tmpNode->nLengths] = |
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186 xs_sldb_gettime(inLine, &linePos); |
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187 tmpNode->nLengths++; |
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188 } else |
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189 iOK = FALSE; |
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190 } |
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191 |
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192 /* Add an node to db in memory */ |
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193 if (iOK) |
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194 xs_sldb_node_insert(db, tmpNode); |
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195 else |
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196 xs_sldb_node_free(tmpNode); |
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197 } |
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198 } |
4 | 199 } |
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200 } else if ((inLine[0] != ';') && (inLine[0] != '[')) { |
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201 XSERR("Invalid line in SongLengthDB file '%s' line #%d\n", dbFilename, lineNum); |
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202 } |
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203 |
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204 } /* while */ |
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206 /* Close the file */ |
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207 fclose(inFile); |
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209 return 0; |
4 | 210 } |
211 | |
212 | |
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213 /* Compare two given MD5-hashes. |
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214 * Return: 0 if equal |
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215 * negative if testHash1 < testHash2 |
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216 * positive if testHash1 > testHash2 |
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217 */ |
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218 static gint xs_sldb_cmphash(t_xs_md5hash testHash1, t_xs_md5hash testHash2) |
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219 { |
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220 register gint i, res = 0; |
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221 |
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222 /* Compute difference of hashes */ |
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223 for (i = 0; (i < XS_MD5HASH_LENGTH) && (!res); i++) |
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224 res = (testHash1[i] - testHash2[i]); |
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225 |
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226 return res; |
227
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227 } |
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228 |
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229 |
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230 /* Get node from db index via binary search |
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231 */ |
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232 static t_xs_sldb_node *xs_sldb_get_node(t_xs_sldb * db, t_xs_md5hash pHash) |
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233 { |
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234 gint iStartNode, iEndNode, iQNode, r, i; |
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235 gboolean iFound; |
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236 t_xs_sldb_node *pResult; |
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237 |
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238 /* Check the database pointers */ |
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239 if (!db || !db->pNodes || !db->ppIndex) |
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240 return NULL; |
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241 |
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242 /* Look-up via index using binary search */ |
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243 pResult = NULL; |
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244 iStartNode = 0; |
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245 iEndNode = (db->n - 1); |
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246 iQNode = (iEndNode / 2); |
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247 iFound = FALSE; |
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248 |
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249 while ((!iFound) && ((iEndNode - iStartNode) > XS_BIN_BAILOUT)) { |
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250 r = xs_sldb_cmphash(pHash, db->ppIndex[iQNode]->md5Hash); |
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251 if (r < 0) { |
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252 /* Hash was in the <- LEFT side */ |
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253 iEndNode = iQNode; |
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254 iQNode = iStartNode + ((iEndNode - iStartNode) / 2); |
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255 } else if (r > 0) { |
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256 /* Hash was in the RIGHT -> side */ |
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257 iStartNode = iQNode; |
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258 iQNode = iStartNode + ((iEndNode - iStartNode) / 2); |
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259 } else |
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260 iFound = TRUE; |
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261 } |
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262 |
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263 /* If not found already */ |
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264 if (!iFound) { |
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265 /* Search the are linearly */ |
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266 iFound = FALSE; |
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267 i = iStartNode; |
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268 while ((i <= iEndNode) && (!iFound)) { |
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269 if (xs_sldb_cmphash(pHash, db->ppIndex[i]->md5Hash) == 0) |
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270 iFound = TRUE; |
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271 else |
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272 i++; |
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273 } |
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274 |
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275 /* Check the result */ |
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276 if (iFound) |
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277 pResult = db->ppIndex[i]; |
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278 |
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279 } else { |
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280 /* Found via binary search */ |
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281 pResult = db->ppIndex[iQNode]; |
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282 } |
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283 |
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284 return pResult; |
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285 } |
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286 |
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287 |
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288 /* Compare two nodes |
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289 */ |
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290 static gint xs_sldb_cmp(const void *pNode1, const void *pNode2) |
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291 { |
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292 /* We assume here that we never ever get NULL-pointers or similar */ |
385 | 293 return xs_sldb_cmphash( |
294 (*(t_xs_sldb_node **) pNode1)->md5Hash, | |
295 (*(t_xs_sldb_node **) pNode2)->md5Hash); | |
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296 } |
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297 |
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298 |
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299 /* (Re)create index |
4 | 300 */ |
359
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301 gint xs_sldb_index(t_xs_sldb * db) |
4 | 302 { |
359
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303 t_xs_sldb_node *pCurr; |
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304 gint i; |
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305 assert(db); |
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306 |
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307 /* Free old index */ |
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308 if (db->ppIndex) { |
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309 g_free(db->ppIndex); |
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310 db->ppIndex = NULL; |
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311 } |
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312 |
359
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313 /* Get size of db */ |
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314 pCurr = db->pNodes; |
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315 db->n = 0; |
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316 while (pCurr) { |
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317 db->n++; |
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318 pCurr = pCurr->pNext; |
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319 } |
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320 |
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321 /* Check number of nodes */ |
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322 if (db->n > 0) { |
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323 /* Allocate memory for index-table */ |
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324 db->ppIndex = (t_xs_sldb_node **) g_malloc(sizeof(t_xs_sldb_node *) * db->n); |
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325 if (!db->ppIndex) |
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326 return -1; |
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327 |
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328 /* Get node-pointers to table */ |
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329 i = 0; |
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330 pCurr = db->pNodes; |
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331 while (pCurr && (i < db->n)) { |
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332 db->ppIndex[i++] = pCurr; |
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333 pCurr = pCurr->pNext; |
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334 } |
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335 |
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336 /* Sort the indexes */ |
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337 qsort(db->ppIndex, db->n, sizeof(t_xs_sldb_node *), xs_sldb_cmp); |
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338 } |
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339 |
359
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340 return 0; |
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341 } |
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342 |
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343 |
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344 /* Free a given song-length database |
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345 */ |
359
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346 void xs_sldb_free(t_xs_sldb * db) |
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347 { |
359
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348 t_xs_sldb_node *pCurr, *pNext; |
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349 |
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350 if (!db) |
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351 return; |
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352 |
359
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353 /* Free the memory allocated for nodes */ |
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354 pCurr = db->pNodes; |
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355 while (pCurr) { |
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356 pNext = pCurr->pNext; |
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357 xs_sldb_node_free(pCurr); |
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358 pCurr = pNext; |
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359 } |
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360 |
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361 db->pNodes = NULL; |
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362 |
359
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363 /* Free memory allocated for index */ |
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364 if (db->ppIndex) { |
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365 g_free(db->ppIndex); |
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366 db->ppIndex = NULL; |
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367 } |
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368 |
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369 /* Free structure */ |
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370 db->n = 0; |
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371 g_free(db); |
4 | 372 } |
373 | |
374 | |
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375 /* Compute md5hash of given SID-file |
4 | 376 */ |
359
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377 typedef struct |
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378 { |
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379 gchar magicID[4]; /* "PSID" / "RSID" magic identifier */ |
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380 guint16 version, /* Version number */ |
385 | 381 dataOffset, /* Start of actual c64 data in file */ |
382 loadAddress, /* Loading address */ | |
383 initAddress, /* Initialization address */ | |
384 playAddress, /* Play one frame */ | |
385 nSongs, /* Number of subsongs */ | |
386 startSong; /* Default starting song */ | |
359
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387 guint32 speed; /* Speed */ |
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388 gchar sidName[32]; /* Descriptive text-fields, ASCIIZ */ |
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389 gchar sidAuthor[32]; |
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390 gchar sidCopyright[32]; |
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391 } t_xs_psidv1_header; |
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392 |
4 | 393 |
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394 typedef struct |
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395 { |
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396 guint16 flags; /* Flags */ |
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397 guint8 startPage, pageLength; |
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398 guint16 reserved; |
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399 } t_xs_psidv2_header; |
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|
400 |
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401 |
359
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402 static gint xs_get_sid_hash(gchar * pcFilename, t_xs_md5hash hash) |
14
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403 { |
359
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404 FILE *inFile; |
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405 t_xs_md5state inState; |
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406 t_xs_psidv1_header psidH; |
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407 t_xs_psidv2_header psidH2; |
241
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408 #ifdef XS_BUF_DYNAMIC |
359
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409 guint8 *songData; |
227
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410 #else |
359
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411 guint8 songData[XS_SIDBUF_SIZE]; |
227
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412 #endif |
359
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413 guint8 ib8[2], i8; |
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414 gint iIndex, iRes; |
14
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415 |
359
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416 /* Try to open the file */ |
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417 if ((inFile = fopen(pcFilename, "rb")) == NULL) |
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418 return -1; |
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419 |
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420 /* Read PSID header in */ |
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421 xs_rd_str(inFile, psidH.magicID, sizeof(psidH.magicID)); |
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422 if ((psidH.magicID[0] != 'P' && psidH.magicID[0] != 'R') || |
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423 (psidH.magicID[1] != 'S') || (psidH.magicID[2] != 'I') || (psidH.magicID[3] != 'D')) { |
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424 fclose(inFile); |
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425 return -2; |
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426 } |
14
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427 |
359
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428 psidH.version = xs_rd_be16(inFile); |
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429 psidH.dataOffset = xs_rd_be16(inFile); |
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430 psidH.loadAddress = xs_rd_be16(inFile); |
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431 psidH.initAddress = xs_rd_be16(inFile); |
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432 psidH.playAddress = xs_rd_be16(inFile); |
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433 psidH.nSongs = xs_rd_be16(inFile); |
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434 psidH.startSong = xs_rd_be16(inFile); |
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435 psidH.speed = xs_rd_be32(inFile); |
14
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436 |
359
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437 xs_rd_str(inFile, psidH.sidName, sizeof(psidH.sidName)); |
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438 xs_rd_str(inFile, psidH.sidAuthor, sizeof(psidH.sidAuthor)); |
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439 xs_rd_str(inFile, psidH.sidCopyright, sizeof(psidH.sidCopyright)); |
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440 |
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441 /* Check if we need to load PSIDv2NG header ... */ |
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442 if (psidH.version == 2) { |
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443 /* Yes, we need to */ |
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444 psidH2.flags = xs_rd_be16(inFile); |
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445 psidH2.startPage = fgetc(inFile); |
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446 psidH2.pageLength = fgetc(inFile); |
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447 psidH2.reserved = xs_rd_be16(inFile); |
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448 } |
385 | 449 |
241
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450 #ifdef XS_BUF_DYNAMIC |
359
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451 /* Allocate buffer */ |
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452 songData = (guint8 *) g_malloc(XS_SIDBUF_SIZE * sizeof(guint8)); |
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453 if (!songData) { |
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454 fclose(inFile); |
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455 return -3; |
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456 } |
227
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457 #endif |
359
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458 |
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459 /* Read data to buffer */ |
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460 iRes = fread(songData, sizeof(guint8), XS_SIDBUF_SIZE, inFile); |
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461 fclose(inFile); |
14
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462 |
359
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463 /* Initialize and start MD5-hash calculation */ |
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464 xs_md5_init(&inState); |
385 | 465 |
359
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466 if (psidH.loadAddress == 0) { |
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467 /* Strip load address (2 first bytes) */ |
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468 xs_md5_append(&inState, &songData[2], iRes - 2); |
227
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469 } else { |
359
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470 /* Append "as is" */ |
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471 xs_md5_append(&inState, songData, iRes); |
227
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472 } |
92bad4c7b998
Improved modularization of STIL and song-length database subsystems.
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|
473 |
241
291715a519e2
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474 #ifdef XS_BUF_DYNAMIC |
359
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475 /* Free buffer */ |
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476 g_free(songData); |
227
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477 #endif |
87
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Various fixes and improvements
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478 |
359
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479 /* Append header data to hash */ |
14
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480 #define XSADDHASH(QDATAB) { ib8[0] = (QDATAB & 0xff); ib8[1] = (QDATAB >> 8); xs_md5_append(&inState, (guint8 *) &ib8, sizeof(ib8)); } |
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481 |
359
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482 XSADDHASH(psidH.initAddress) |
385 | 483 XSADDHASH(psidH.playAddress) |
484 XSADDHASH(psidH.nSongs) | |
359
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485 #undef XSADDHASH |
385 | 486 |
487 /* Append song speed data to hash */ | |
488 i8 = 0; | |
359
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489 for (iIndex = 0; (iIndex < psidH.nSongs) && (iIndex < 32); iIndex++) { |
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490 i8 = (psidH.speed & (1 << iIndex)) ? 60 : 0; |
14
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491 xs_md5_append(&inState, &i8, sizeof(i8)); |
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|
492 } |
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Made song-length database support FINALLY work!
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|
493 |
359
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494 /* Rest of songs (more than 32) */ |
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495 for (iIndex = 32; iIndex < psidH.nSongs; iIndex++) { |
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496 xs_md5_append(&inState, &i8, sizeof(i8)); |
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497 } |
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|
498 |
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|
499 /* PSIDv2NG specific */ |
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500 if (psidH.version == 2) { |
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501 /* SEE SIDPLAY HEADERS FOR INFO */ |
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502 i8 = (psidH2.flags >> 2) & 3; |
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503 if (i8 == 2) |
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|
504 xs_md5_append(&inState, &i8, sizeof(i8)); |
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|
505 } |
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|
506 |
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|
507 /* Calculate the hash */ |
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|
508 xs_md5_finish(&inState, hash); |
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|
509 |
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|
510 return 0; |
14
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Made song-length database support FINALLY work!
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|
511 } |
4 | 512 |
513 | |
227
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514 /* Get song lengths |
4 | 515 */ |
359
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|
516 t_xs_sldb_node *xs_sldb_get(t_xs_sldb * db, gchar * pcFilename) |
4 | 517 { |
359
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|
518 t_xs_sldb_node *pResult; |
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519 t_xs_md5hash dbHash; |
4 | 520 |
359
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|
521 /* Get the hash and then look up from db */ |
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522 if (xs_get_sid_hash(pcFilename, dbHash) == 0) |
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523 pResult = xs_sldb_get_node(db, dbHash); |
227
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524 else |
359
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525 pResult = NULL; |
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526 |
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527 return pResult; |
4 | 528 } |
230 | 529 |
530 | |
531 /* | |
532 * These should be moved out of this module some day ... | |
533 */ | |
359
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534 static t_xs_sldb *xs_sldb_db = NULL; |
230 | 535 XS_MUTEX(xs_sldb_db); |
536 | |
537 gint xs_songlen_init(void) | |
538 { | |
359
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539 XS_MUTEX_LOCK(xs_cfg); |
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540 |
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541 if (!xs_cfg.songlenDBPath) { |
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542 XS_MUTEX_UNLOCK(xs_cfg); |
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543 return -1; |
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544 } |
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545 |
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546 XS_MUTEX_LOCK(xs_sldb_db); |
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547 |
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548 /* Check if already initialized */ |
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549 if (xs_sldb_db) |
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550 xs_sldb_free(xs_sldb_db); |
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551 |
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552 /* Allocate database */ |
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553 xs_sldb_db = (t_xs_sldb *) g_malloc0(sizeof(t_xs_sldb)); |
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554 if (!xs_sldb_db) { |
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555 XS_MUTEX_UNLOCK(xs_cfg); |
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556 XS_MUTEX_UNLOCK(xs_sldb_db); |
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557 return -2; |
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558 } |
230 | 559 |
359
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560 /* Read the database */ |
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561 if (xs_sldb_read(xs_sldb_db, xs_cfg.songlenDBPath) != 0) { |
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562 xs_sldb_free(xs_sldb_db); |
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563 xs_sldb_db = NULL; |
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564 XS_MUTEX_UNLOCK(xs_cfg); |
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565 XS_MUTEX_UNLOCK(xs_sldb_db); |
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566 return -3; |
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567 } |
230 | 568 |
359
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569 /* Create index */ |
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570 if (xs_sldb_index(xs_sldb_db) != 0) { |
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571 xs_sldb_free(xs_sldb_db); |
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572 xs_sldb_db = NULL; |
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573 XS_MUTEX_UNLOCK(xs_cfg); |
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574 XS_MUTEX_UNLOCK(xs_sldb_db); |
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575 return -4; |
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576 } |
230 | 577 |
359
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578 XS_MUTEX_UNLOCK(xs_cfg); |
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579 XS_MUTEX_UNLOCK(xs_sldb_db); |
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580 return 0; |
230 | 581 } |
582 | |
583 | |
584 void xs_songlen_close(void) | |
585 { | |
359
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586 XS_MUTEX_LOCK(xs_sldb_db); |
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587 xs_sldb_free(xs_sldb_db); |
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588 xs_sldb_db = NULL; |
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589 XS_MUTEX_UNLOCK(xs_sldb_db); |
230 | 590 } |
591 | |
592 | |
359
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593 t_xs_sldb_node *xs_songlen_get(gchar * pcFilename) |
230 | 594 { |
359
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595 t_xs_sldb_node *pResult; |
230 | 596 |
359
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597 XS_MUTEX_LOCK(xs_sldb_db); |
230 | 598 |
359
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599 if (xs_cfg.songlenDBEnable && xs_sldb_db) |
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600 pResult = xs_sldb_get(xs_sldb_db, pcFilename); |
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601 else |
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602 pResult = NULL; |
230 | 603 |
359
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604 XS_MUTEX_UNLOCK(xs_sldb_db); |
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605 |
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606 return pResult; |
230 | 607 } |