Mercurial > hg > xmms-sid
annotate src/xs_length.c @ 412:7f694e5a1493
Updated GNU GPL (new FSF address) and some cleanups.
author | Matti Hamalainen <ccr@tnsp.org> |
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date | Mon, 14 Aug 2006 00:49:02 +0000 |
parents | f997b79a7251 |
children | 0cfb306f7af8 |
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 | |
412
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19 You should have received a copy of the GNU General Public License along |
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20 with this program; if not, write to the Free Software Foundation, Inc., |
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21 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
4 | 22 */ |
39 | 23 #include "xs_length.h" |
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24 #include "xs_support.h" |
230 | 25 #include "xs_config.h" |
223
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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 /* Free memory allocated for given SLDB node |
4 | 33 */ |
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34 static void xs_sldb_node_free(t_xs_sldb_node *pNode) |
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35 { |
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36 if (pNode) { |
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37 /* Nothing much to do here ... */ |
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38 g_free(pNode->sLengths); |
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39 g_free(pNode); |
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40 } |
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41 } |
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42 |
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43 |
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44 /* Insert given node to db linked list |
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45 */ |
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46 static void xs_sldb_node_insert(t_xs_sldb *db, t_xs_sldb_node *pNode) |
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47 { |
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48 assert(db); |
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49 |
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50 if (db->pNodes) { |
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51 /* The first node's pPrev points to last node */ |
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52 LPREV = db->pNodes->pPrev; /* New node's prev = Previous last node */ |
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53 db->pNodes->pPrev->pNext = pNode; /* Previous last node's next = New node */ |
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54 db->pNodes->pPrev = pNode; /* New last node = New node */ |
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55 LNEXT = NULL; /* But next is NULL! */ |
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56 } else { |
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57 db->pNodes = pNode; /* First node ... */ |
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58 LPREV = pNode; /* ... it's also last */ |
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59 LNEXT = NULL; /* But next is NULL! */ |
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60 } |
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61 } |
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62 |
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63 |
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64 /* Parse a time-entry in SLDB format |
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65 */ |
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66 static gint xs_sldb_gettime(gchar *pcStr, gint *piPos) |
4 | 67 { |
389 | 68 gint iResult, iTemp; |
4 | 69 |
359
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70 /* Check if it starts with a digit */ |
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71 if (isdigit(pcStr[*piPos])) { |
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72 /* Get minutes-field */ |
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73 iResult = 0; |
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74 while (isdigit(pcStr[*piPos])) |
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75 iResult = (iResult * 10) + (pcStr[(*piPos)++] - '0'); |
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76 |
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77 iResult *= 60; |
4 | 78 |
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79 /* Check the field separator char */ |
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80 if (pcStr[*piPos] == ':') { |
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81 /* Get seconds-field */ |
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82 (*piPos)++; |
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83 iTemp = 0; |
385 | 84 while (isdigit(pcStr[*piPos])) { |
359
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85 iTemp = (iTemp * 10) + (pcStr[(*piPos)++] - '0'); |
385 | 86 } |
4 | 87 |
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88 iResult += iTemp; |
4 | 89 } else |
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90 iResult = -2; |
4 | 91 } else |
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92 iResult = -1; |
4 | 93 |
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94 /* Ignore and skip the possible attributes */ |
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95 while (pcStr[*piPos] && !isspace(pcStr[*piPos])) |
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96 (*piPos)++; |
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97 |
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98 return iResult; |
4 | 99 } |
100 | |
101 | |
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102 /* Parse one SLDB definition line, return SLDB node |
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103 */ |
389 | 104 t_xs_sldb_node * xs_sldb_read_entry(gchar *inLine) |
105 { | |
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106 gint linePos, savePos, i, tmpLen, l; |
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107 gboolean iOK; |
389 | 108 t_xs_sldb_node *tmpNode; |
109 | |
110 /* Allocate new node */ | |
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111 tmpNode = (t_xs_sldb_node *) g_malloc0(sizeof(t_xs_sldb_node)); |
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112 if (!tmpNode) { |
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113 xs_error("Error allocating new node. Fatal error.\n"); |
389 | 114 return NULL; |
115 } | |
116 | |
117 /* Get hash value */ | |
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118 linePos = 0; |
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119 for (i = 0; i < XS_MD5HASH_LENGTH; i++, linePos += 2) { |
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120 sscanf(&inLine[linePos], "%2x", |
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121 (guint *) &(tmpNode->md5Hash[i])); |
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122 } |
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123 |
389 | 124 /* Get playtimes */ |
125 if (inLine[linePos] != 0) { | |
126 if (inLine[linePos] != '=') { | |
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127 xs_error("'=' expected on column #%d.\n", linePos); |
389 | 128 xs_sldb_node_free(tmpNode); |
129 return NULL; | |
130 } else { | |
131 /* First playtime is after '=' */ | |
132 savePos = ++linePos; | |
133 tmpLen = strlen(inLine); | |
134 | |
135 /* Get number of sub-tune lengths */ | |
136 iOK = TRUE; | |
137 while ((linePos < tmpLen) && iOK) { | |
138 xs_findnext(inLine, &linePos); | |
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139 |
389 | 140 if (xs_sldb_gettime(inLine, &linePos) >= 0) |
141 tmpNode->nLengths++; | |
142 else | |
143 iOK = FALSE; | |
144 } | |
145 | |
146 /* Allocate memory for lengths */ | |
147 tmpNode->sLengths = (gint *) g_malloc0(tmpNode->nLengths * sizeof(gint)); | |
148 if (!tmpNode->sLengths) { | |
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149 xs_error("Could not allocate memory for node.\n"); |
389 | 150 xs_sldb_node_free(tmpNode); |
151 return NULL; | |
152 } | |
153 | |
154 /* Read lengths in */ | |
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155 i = 0; |
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156 linePos = savePos; |
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157 iOK = TRUE; |
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158 while ((linePos < tmpLen) && (i < tmpNode->nLengths) && iOK) { |
389 | 159 xs_findnext(inLine, &linePos); |
160 | |
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161 l = xs_sldb_gettime(inLine, &linePos); |
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162 if (l >= 0) |
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163 tmpNode->sLengths[i] = l; |
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164 else |
389 | 165 iOK = FALSE; |
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166 |
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167 i++; |
389 | 168 } |
169 | |
170 if (!iOK) { | |
171 xs_sldb_node_free(tmpNode); | |
172 return NULL; | |
173 } else | |
174 return tmpNode; | |
175 } | |
176 } | |
177 | |
178 return NULL; | |
179 } | |
180 | |
181 | |
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182 /* Read database to memory |
4 | 183 */ |
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184 gint xs_sldb_read(t_xs_sldb *db, const gchar *dbFilename) |
4 | 185 { |
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186 FILE *inFile; |
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187 gchar inLine[XS_BUF_SIZE]; |
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188 gint lineNum; |
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189 t_xs_sldb_node *tmpNode; |
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190 assert(db); |
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191 |
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192 /* Try to open the file */ |
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193 if ((inFile = fopen(dbFilename, "ra")) == NULL) { |
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194 xs_error("Could not open SongLengthDB '%s'\n", dbFilename); |
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195 return -1; |
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196 } |
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197 |
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198 /* Read and parse the data */ |
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199 lineNum = 0; |
4 | 200 |
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201 while (!feof(inFile)) { |
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202 gint linePos; |
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203 fgets(inLine, XS_BUF_SIZE, inFile); |
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204 inLine[XS_BUF_SIZE - 1] = 0; |
389 | 205 linePos = 0; |
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206 lineNum++; |
4 | 207 |
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208 /* Check if it is datafield */ |
389 | 209 if (isxdigit(inLine[linePos])) { |
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210 /* Check the length of the hash */ |
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211 gint hashLen; |
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212 for (hashLen = 0; isxdigit(inLine[linePos]); hashLen++, linePos++); |
389 | 213 |
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214 if (hashLen != XS_MD5HASH_LENGTH_CH) { |
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215 xs_error("Invalid MD5-hash in SongLengthDB file '%s' line #%d!\n", |
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216 dbFilename, lineNum); |
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217 } else { |
389 | 218 /* Parse and add node to db */ |
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219 if ((tmpNode = xs_sldb_read_entry(inLine)) != NULL) { |
389 | 220 xs_sldb_node_insert(db, tmpNode); |
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221 } else { |
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222 xs_error("Invalid entry in SongLengthDB file '%s' line #%d!\n", |
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223 dbFilename, lineNum); |
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224 } |
4 | 225 } |
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226 } else if ((inLine[linePos] != ';') && (inLine[linePos] != '[')) { |
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227 xs_error("Invalid line in SongLengthDB file '%s' line #%d\n", |
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228 dbFilename, lineNum); |
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229 } |
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230 |
389 | 231 } |
4 | 232 |
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233 /* Close the file */ |
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234 fclose(inFile); |
4 | 235 |
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236 return 0; |
4 | 237 } |
238 | |
239 | |
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240 /* Compare two given MD5-hashes. |
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241 * Return: 0 if equal |
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242 * negative if testHash1 < testHash2 |
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243 * positive if testHash1 > testHash2 |
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244 */ |
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245 static gint xs_sldb_cmphash(t_xs_md5hash testHash1, t_xs_md5hash testHash2) |
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246 { |
392
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247 gint i, d; |
227
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248 |
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249 /* Compute difference of hashes */ |
392
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250 for (i = 0, d = 0; (i < XS_MD5HASH_LENGTH) && !d; i++) |
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251 d = (testHash1[i] - testHash2[i]); |
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252 |
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253 return d; |
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254 } |
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255 |
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256 |
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257 /* Get node from db index via binary search |
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258 */ |
359
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259 static t_xs_sldb_node *xs_sldb_get_node(t_xs_sldb * db, t_xs_md5hash pHash) |
227
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260 { |
359
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261 gint iStartNode, iEndNode, iQNode, r, i; |
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262 gboolean iFound; |
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263 t_xs_sldb_node *pResult; |
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264 |
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265 /* Check the database pointers */ |
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266 if (!db || !db->pNodes || !db->ppIndex) |
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267 return NULL; |
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268 |
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269 /* Look-up via index using binary search */ |
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270 pResult = NULL; |
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271 iStartNode = 0; |
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272 iEndNode = (db->n - 1); |
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273 iQNode = (iEndNode / 2); |
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274 iFound = FALSE; |
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275 |
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276 while ((!iFound) && ((iEndNode - iStartNode) > XS_BIN_BAILOUT)) { |
359
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277 r = xs_sldb_cmphash(pHash, db->ppIndex[iQNode]->md5Hash); |
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278 if (r < 0) { |
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279 /* Hash was in the <- LEFT side */ |
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280 iEndNode = iQNode; |
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281 iQNode = iStartNode + ((iEndNode - iStartNode) / 2); |
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282 } else if (r > 0) { |
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283 /* Hash was in the RIGHT -> side */ |
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284 iStartNode = iQNode; |
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285 iQNode = iStartNode + ((iEndNode - iStartNode) / 2); |
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286 } else |
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287 iFound = TRUE; |
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288 } |
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289 |
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290 /* If not found already */ |
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291 if (!iFound) { |
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292 /* Search the are linearly */ |
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293 iFound = FALSE; |
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294 i = iStartNode; |
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295 while ((i <= iEndNode) && (!iFound)) { |
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296 if (xs_sldb_cmphash(pHash, db->ppIndex[i]->md5Hash) == 0) |
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297 iFound = TRUE; |
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298 else |
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299 i++; |
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300 } |
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301 |
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302 /* Check the result */ |
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303 if (iFound) |
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304 pResult = db->ppIndex[i]; |
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305 |
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306 } else { |
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307 /* Found via binary search */ |
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308 pResult = db->ppIndex[iQNode]; |
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309 } |
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310 |
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311 return pResult; |
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312 } |
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313 |
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314 |
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315 /* Compare two nodes |
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316 */ |
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317 static gint xs_sldb_cmp(const void *pNode1, const void *pNode2) |
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318 { |
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319 /* We assume here that we never ever get NULL-pointers or similar */ |
385 | 320 return xs_sldb_cmphash( |
321 (*(t_xs_sldb_node **) pNode1)->md5Hash, | |
322 (*(t_xs_sldb_node **) pNode2)->md5Hash); | |
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323 } |
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324 |
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325 |
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326 /* (Re)create index |
4 | 327 */ |
359
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328 gint xs_sldb_index(t_xs_sldb * db) |
4 | 329 { |
359
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330 t_xs_sldb_node *pCurr; |
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331 gint i; |
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332 assert(db); |
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333 |
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334 /* Free old index */ |
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335 if (db->ppIndex) { |
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336 g_free(db->ppIndex); |
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337 db->ppIndex = NULL; |
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338 } |
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339 |
359
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340 /* Get size of db */ |
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341 pCurr = db->pNodes; |
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342 db->n = 0; |
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343 while (pCurr) { |
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344 db->n++; |
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345 pCurr = pCurr->pNext; |
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346 } |
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347 |
359
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348 /* Check number of nodes */ |
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349 if (db->n > 0) { |
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350 /* Allocate memory for index-table */ |
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351 db->ppIndex = (t_xs_sldb_node **) g_malloc(sizeof(t_xs_sldb_node *) * db->n); |
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352 if (!db->ppIndex) |
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353 return -1; |
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354 |
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355 /* Get node-pointers to table */ |
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356 i = 0; |
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357 pCurr = db->pNodes; |
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358 while (pCurr && (i < db->n)) { |
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359 db->ppIndex[i++] = pCurr; |
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360 pCurr = pCurr->pNext; |
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361 } |
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362 |
359
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363 /* Sort the indexes */ |
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364 qsort(db->ppIndex, db->n, sizeof(t_xs_sldb_node *), xs_sldb_cmp); |
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365 } |
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366 |
359
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367 return 0; |
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368 } |
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369 |
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370 |
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371 /* Free a given song-length database |
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372 */ |
359
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373 void xs_sldb_free(t_xs_sldb * db) |
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374 { |
359
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375 t_xs_sldb_node *pCurr, *pNext; |
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376 |
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377 if (!db) |
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378 return; |
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379 |
359
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380 /* Free the memory allocated for nodes */ |
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381 pCurr = db->pNodes; |
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382 while (pCurr) { |
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383 pNext = pCurr->pNext; |
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384 xs_sldb_node_free(pCurr); |
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385 pCurr = pNext; |
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386 } |
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387 |
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388 db->pNodes = NULL; |
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389 |
359
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390 /* Free memory allocated for index */ |
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391 if (db->ppIndex) { |
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392 g_free(db->ppIndex); |
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393 db->ppIndex = NULL; |
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394 } |
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395 |
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396 /* Free structure */ |
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397 db->n = 0; |
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398 g_free(db); |
4 | 399 } |
400 | |
401 | |
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402 /* Compute md5hash of given SID-file |
4 | 403 */ |
359
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404 typedef struct |
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405 { |
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406 gchar magicID[4]; /* "PSID" / "RSID" magic identifier */ |
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407 guint16 version, /* Version number */ |
385 | 408 dataOffset, /* Start of actual c64 data in file */ |
409 loadAddress, /* Loading address */ | |
410 initAddress, /* Initialization address */ | |
411 playAddress, /* Play one frame */ | |
412 nSongs, /* Number of subsongs */ | |
413 startSong; /* Default starting song */ | |
359
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414 guint32 speed; /* Speed */ |
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415 gchar sidName[32]; /* Descriptive text-fields, ASCIIZ */ |
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416 gchar sidAuthor[32]; |
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417 gchar sidCopyright[32]; |
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418 } t_xs_psidv1_header; |
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419 |
4 | 420 |
359
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421 typedef struct |
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422 { |
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423 guint16 flags; /* Flags */ |
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424 guint8 startPage, pageLength; |
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425 guint16 reserved; |
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426 } t_xs_psidv2_header; |
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427 |
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428 |
402
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429 static gint xs_get_sid_hash(const gchar *pcFilename, t_xs_md5hash hash) |
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430 { |
359
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431 FILE *inFile; |
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432 t_xs_md5state inState; |
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433 t_xs_psidv1_header psidH; |
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434 t_xs_psidv2_header psidH2; |
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435 guint8 *songData; |
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436 guint8 ib8[2], i8; |
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437 gint iIndex, iRes; |
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438 |
359
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439 /* Try to open the file */ |
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440 if ((inFile = fopen(pcFilename, "rb")) == NULL) |
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441 return -1; |
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442 |
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443 /* Read PSID header in */ |
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444 xs_rd_str(inFile, psidH.magicID, sizeof(psidH.magicID)); |
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445 if ((psidH.magicID[0] != 'P' && psidH.magicID[0] != 'R') || |
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446 (psidH.magicID[1] != 'S') || (psidH.magicID[2] != 'I') || (psidH.magicID[3] != 'D')) { |
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447 fclose(inFile); |
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448 return -2; |
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449 } |
14
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Made song-length database support FINALLY work!
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450 |
359
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451 psidH.version = xs_rd_be16(inFile); |
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452 psidH.dataOffset = xs_rd_be16(inFile); |
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453 psidH.loadAddress = xs_rd_be16(inFile); |
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454 psidH.initAddress = xs_rd_be16(inFile); |
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455 psidH.playAddress = xs_rd_be16(inFile); |
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456 psidH.nSongs = xs_rd_be16(inFile); |
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457 psidH.startSong = xs_rd_be16(inFile); |
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458 psidH.speed = xs_rd_be32(inFile); |
14
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459 |
359
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460 xs_rd_str(inFile, psidH.sidName, sizeof(psidH.sidName)); |
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461 xs_rd_str(inFile, psidH.sidAuthor, sizeof(psidH.sidAuthor)); |
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462 xs_rd_str(inFile, psidH.sidCopyright, sizeof(psidH.sidCopyright)); |
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463 |
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464 /* Check if we need to load PSIDv2NG header ... */ |
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465 if (psidH.version == 2) { |
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466 /* Yes, we need to */ |
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467 psidH2.flags = xs_rd_be16(inFile); |
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468 psidH2.startPage = fgetc(inFile); |
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469 psidH2.pageLength = fgetc(inFile); |
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470 psidH2.reserved = xs_rd_be16(inFile); |
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471 } |
385 | 472 |
359
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473 /* Allocate buffer */ |
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474 songData = (guint8 *) g_malloc(XS_SIDBUF_SIZE * sizeof(guint8)); |
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475 if (!songData) { |
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476 fclose(inFile); |
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477 return -3; |
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478 } |
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479 |
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480 /* Read data to buffer */ |
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481 iRes = fread(songData, sizeof(guint8), XS_SIDBUF_SIZE, inFile); |
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482 fclose(inFile); |
14
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483 |
359
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484 /* Initialize and start MD5-hash calculation */ |
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485 xs_md5_init(&inState); |
385 | 486 |
359
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487 if (psidH.loadAddress == 0) { |
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488 /* Strip load address (2 first bytes) */ |
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489 xs_md5_append(&inState, &songData[2], iRes - 2); |
227
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490 } else { |
359
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491 /* Append "as is" */ |
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492 xs_md5_append(&inState, songData, iRes); |
227
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493 } |
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494 |
359
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495 /* Free buffer */ |
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496 g_free(songData); |
87
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497 |
359
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498 /* Append header data to hash */ |
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499 #define XSADDHASH(QDATAB) { ib8[0] = (QDATAB & 0xff); ib8[1] = (QDATAB >> 8); xs_md5_append(&inState, (guint8 *) &ib8, sizeof(ib8)); } |
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500 |
359
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501 XSADDHASH(psidH.initAddress) |
385 | 502 XSADDHASH(psidH.playAddress) |
503 XSADDHASH(psidH.nSongs) | |
359
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504 #undef XSADDHASH |
385 | 505 |
506 /* Append song speed data to hash */ | |
507 i8 = 0; | |
359
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508 for (iIndex = 0; (iIndex < psidH.nSongs) && (iIndex < 32); iIndex++) { |
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509 i8 = (psidH.speed & (1 << iIndex)) ? 60 : 0; |
14
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510 xs_md5_append(&inState, &i8, sizeof(i8)); |
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511 } |
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512 |
359
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513 /* Rest of songs (more than 32) */ |
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514 for (iIndex = 32; iIndex < psidH.nSongs; iIndex++) { |
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515 xs_md5_append(&inState, &i8, sizeof(i8)); |
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516 } |
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517 |
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518 /* PSIDv2NG specific */ |
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519 if (psidH.version == 2) { |
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520 /* SEE SIDPLAY HEADERS FOR INFO */ |
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521 i8 = (psidH2.flags >> 2) & 3; |
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522 if (i8 == 2) |
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523 xs_md5_append(&inState, &i8, sizeof(i8)); |
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524 } |
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|
525 |
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526 /* Calculate the hash */ |
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527 xs_md5_finish(&inState, hash); |
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528 |
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529 return 0; |
14
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530 } |
4 | 531 |
532 | |
227
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533 /* Get song lengths |
4 | 534 */ |
402
f997b79a7251
More work on merging of improved STIL/SLDB handling code with completely
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535 t_xs_sldb_node *xs_sldb_get(t_xs_sldb *db, const gchar *pcFilename) |
4 | 536 { |
359
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537 t_xs_sldb_node *pResult; |
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538 t_xs_md5hash dbHash; |
4 | 539 |
359
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540 /* Get the hash and then look up from db */ |
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541 if (xs_get_sid_hash(pcFilename, dbHash) == 0) |
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542 pResult = xs_sldb_get_node(db, dbHash); |
227
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543 else |
359
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544 pResult = NULL; |
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545 |
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546 return pResult; |
4 | 547 } |
230 | 548 |
549 | |
550 /* | |
551 * These should be moved out of this module some day ... | |
552 */ | |
359
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553 static t_xs_sldb *xs_sldb_db = NULL; |
230 | 554 XS_MUTEX(xs_sldb_db); |
555 | |
556 gint xs_songlen_init(void) | |
557 { | |
359
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558 XS_MUTEX_LOCK(xs_cfg); |
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559 |
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560 if (!xs_cfg.songlenDBPath) { |
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561 XS_MUTEX_UNLOCK(xs_cfg); |
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562 return -1; |
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563 } |
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564 |
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565 XS_MUTEX_LOCK(xs_sldb_db); |
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566 |
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567 /* Check if already initialized */ |
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568 if (xs_sldb_db) |
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569 xs_sldb_free(xs_sldb_db); |
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570 |
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571 /* Allocate database */ |
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572 xs_sldb_db = (t_xs_sldb *) g_malloc0(sizeof(t_xs_sldb)); |
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573 if (!xs_sldb_db) { |
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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 -2; |
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577 } |
230 | 578 |
359
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579 /* Read the database */ |
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580 if (xs_sldb_read(xs_sldb_db, xs_cfg.songlenDBPath) != 0) { |
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581 xs_sldb_free(xs_sldb_db); |
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582 xs_sldb_db = NULL; |
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583 XS_MUTEX_UNLOCK(xs_cfg); |
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584 XS_MUTEX_UNLOCK(xs_sldb_db); |
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585 return -3; |
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586 } |
230 | 587 |
359
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588 /* Create index */ |
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589 if (xs_sldb_index(xs_sldb_db) != 0) { |
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590 xs_sldb_free(xs_sldb_db); |
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591 xs_sldb_db = NULL; |
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592 XS_MUTEX_UNLOCK(xs_cfg); |
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593 XS_MUTEX_UNLOCK(xs_sldb_db); |
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594 return -4; |
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595 } |
230 | 596 |
359
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597 XS_MUTEX_UNLOCK(xs_cfg); |
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598 XS_MUTEX_UNLOCK(xs_sldb_db); |
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599 return 0; |
230 | 600 } |
601 | |
602 | |
603 void xs_songlen_close(void) | |
604 { | |
359
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605 XS_MUTEX_LOCK(xs_sldb_db); |
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606 xs_sldb_free(xs_sldb_db); |
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607 xs_sldb_db = NULL; |
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608 XS_MUTEX_UNLOCK(xs_sldb_db); |
230 | 609 } |
610 | |
611 | |
402
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612 t_xs_sldb_node *xs_songlen_get(const gchar * pcFilename) |
230 | 613 { |
359
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614 t_xs_sldb_node *pResult; |
230 | 615 |
359
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616 XS_MUTEX_LOCK(xs_sldb_db); |
230 | 617 |
359
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618 if (xs_cfg.songlenDBEnable && xs_sldb_db) |
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619 pResult = xs_sldb_get(xs_sldb_db, pcFilename); |
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620 else |
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621 pResult = NULL; |
230 | 622 |
359
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623 XS_MUTEX_UNLOCK(xs_sldb_db); |
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624 |
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625 return pResult; |
230 | 626 } |