Mercurial > hg > xmms-sid
annotate src/xs_stil.c @ 369:4611f1194941
Make binary search bailout value a #define in xmms-sid.h
author | Matti Hamalainen <ccr@tnsp.org> |
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date | Wed, 09 Nov 2005 05:22:05 +0000 |
parents | b1a858b8cb1a |
children | b09d74eb71e6 |
rev | line source |
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1 | 1 /* |
103
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2 XMMS-SID - SIDPlay input plugin for X MultiMedia System (XMMS) |
1 | 3 |
103
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4 STIL-database handling functions |
1 | 5 |
324 | 6 Programmed and designed by Matti 'ccr' Hamalainen <ccr@tnsp.org> |
7 (C) Copyright 1999-2005 Tecnic Software productions (TNSP) | |
1 | 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 */ | |
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23 #include "xs_stil.h" |
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24 #include "xs_support.h" |
230 | 25 #include "xs_config.h" |
1 | 26 #include <stdio.h> |
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27 #include <stdlib.h> |
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28 #include <ctype.h> |
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29 |
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30 |
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31 /* Database handling functions |
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32 */ |
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33 static t_xs_stil_node *xs_stildb_node_new(gchar * pcFilename) |
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34 { |
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35 t_xs_stil_node *pResult; |
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36 |
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37 /* Allocate memory for new node */ |
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38 pResult = (t_xs_stil_node *) g_malloc0(sizeof(t_xs_stil_node)); |
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39 if (!pResult) |
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40 return NULL; |
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41 |
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42 pResult->pcFilename = g_strdup(pcFilename); |
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43 if (!pResult->pcFilename) { |
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44 g_free(pResult); |
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45 return NULL; |
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46 } |
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47 |
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48 return pResult; |
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49 } |
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50 |
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51 |
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52 static void xs_stildb_node_free(t_xs_stil_node * pNode) |
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53 { |
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54 gint i; |
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55 |
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56 if (pNode) { |
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57 /* Free subtune information */ |
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58 for (i = 0; i <= XS_STIL_MAXENTRY; i++) { |
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59 g_free(pNode->subTunes[i].pName); |
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60 g_free(pNode->subTunes[i].pAuthor); |
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61 g_free(pNode->subTunes[i].pInfo); |
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62 } |
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63 |
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64 g_free(pNode->pcFilename); |
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65 g_free(pNode); |
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66 } |
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67 } |
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68 |
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69 |
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70 /* Insert given node to db linked list |
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71 */ |
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72 static void xs_stildb_node_insert(t_xs_stildb * db, t_xs_stil_node * pNode) |
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73 { |
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74 assert(db); |
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75 |
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76 if (db->pNodes) { |
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77 /* The first node's pPrev points to last node */ |
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78 LPREV = db->pNodes->pPrev; /* New node's prev = Previous last node */ |
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79 db->pNodes->pPrev->pNext = pNode; /* Previous last node's next = New node */ |
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80 db->pNodes->pPrev = pNode; /* New last node = New node */ |
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81 LNEXT = NULL; /* But next is NULL! */ |
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82 } else { |
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83 db->pNodes = pNode; /* First node ... */ |
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84 LPREV = pNode; /* ... it's also last */ |
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85 LNEXT = NULL; /* But next is NULL! */ |
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86 } |
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87 } |
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88 |
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89 |
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90 /* Read database (additively) to given db-structure |
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91 */ |
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92 #define XS_STILDB_MULTI if (isMulti) { isMulti = FALSE; xs_pstrcat(&(tmpNode->subTunes[subEntry].pInfo), "\n"); } |
240
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93 |
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94 |
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95 gint xs_stildb_read(t_xs_stildb * db, gchar * dbFilename) |
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96 { |
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97 FILE *inFile; |
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98 gchar inLine[XS_BUF_SIZE + 16]; /* Since we add some chars here and there */ |
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99 guint lineNum, linePos, eolPos; |
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100 t_xs_stil_node *tmpNode; |
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101 gboolean isError, isMulti; |
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102 gint subEntry; |
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103 assert(db); |
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104 |
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105 /* Try to open the file */ |
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106 if ((inFile = fopen(dbFilename, "ra")) == NULL) { |
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107 XSERR("Could not open STILDB '%s'\n", dbFilename); |
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108 return -1; |
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109 } |
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110 |
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111 /* Read and parse the data */ |
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112 lineNum = 0; |
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113 isError = FALSE; |
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114 isMulti = FALSE; |
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115 tmpNode = NULL; |
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116 subEntry = 0; |
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117 |
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118 while (!feof(inFile) && !isError) { |
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119 fgets(inLine, XS_BUF_SIZE, inFile); |
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120 inLine[XS_BUF_SIZE - 1] = 0; |
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121 linePos = eolPos = 0; |
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122 xs_findeol(inLine, &eolPos); |
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123 inLine[eolPos] = 0; |
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124 lineNum++; |
103
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125 |
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126 switch (inLine[0]) { |
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127 case '/': |
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128 /* Check if we are already parsing entry */ |
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129 isMulti = FALSE; |
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130 if (tmpNode) { |
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131 XSERR("New entry ('%s') before end of current ('%s')! Possibly malformed STIL-file!\n", |
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132 inLine, tmpNode->pcFilename); |
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133 |
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134 xs_stildb_node_free(tmpNode); |
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135 } |
109
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136 |
359
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137 /* A new node */ |
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138 subEntry = 0; |
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139 tmpNode = xs_stildb_node_new(inLine); |
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140 if (!tmpNode) { |
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141 /* Allocation failed */ |
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142 XSERR("Could not allocate new STILdb-node for '%s'!\n", inLine); |
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143 isError = TRUE; |
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144 } |
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145 break; |
103
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146 |
359
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147 case '(': |
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148 /* A new sub-entry */ |
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149 isMulti = FALSE; |
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150 linePos++; |
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151 if (inLine[linePos] == '#') { |
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152 linePos++; |
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153 if (inLine[linePos]) { |
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154 xs_findnum(inLine, &linePos); |
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155 inLine[linePos] = 0; |
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156 subEntry = atol(&inLine[2]); |
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157 |
359
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158 /* Sanity check */ |
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159 if ((subEntry < 1) || (subEntry > XS_STIL_MAXENTRY)) { |
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160 XSERR("Number of subEntry (%i) for '%s' is invalid\n", subEntry, |
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161 tmpNode->pcFilename); |
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162 subEntry = 0; |
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163 } |
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164 } |
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165 } |
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166 |
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167 break; |
109
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168 |
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169 case 0: |
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170 case '#': |
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171 case '\n': |
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172 case '\r': |
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173 /* End of entry/field */ |
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174 isMulti = FALSE; |
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175 if (tmpNode) { |
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176 /* Insert to database */ |
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177 xs_stildb_node_insert(db, tmpNode); |
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178 tmpNode = NULL; |
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179 } |
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180 break; |
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181 |
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182 default: |
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183 /* Check if we are parsing an entry */ |
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184 if (!tmpNode) { |
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185 XSERR("Entry data encountered outside of entry!\n"); |
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186 break; |
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187 } |
117
453ac1293f6a
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188 |
359
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189 /* Some other type */ |
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190 if (strncmp(inLine, " NAME:", 8) == 0) { |
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191 XS_STILDB_MULTI g_free(tmpNode->subTunes[subEntry].pName); |
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192 tmpNode->subTunes[subEntry].pName = g_strdup(&inLine[9]); |
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193 } else if (strncmp(inLine, " AUTHOR:", 8) == 0) { |
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194 XS_STILDB_MULTI g_free(tmpNode->subTunes[subEntry].pAuthor); |
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195 tmpNode->subTunes[subEntry].pAuthor = g_strdup(&inLine[9]); |
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196 } else if (strncmp(inLine, " TITLE:", 8) == 0) { |
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197 XS_STILDB_MULTI inLine[eolPos++] = '\n'; |
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198 inLine[eolPos++] = 0; |
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199 xs_pstrcat(&(tmpNode->subTunes[subEntry].pInfo), &inLine[2]); |
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200 } else if (strncmp(inLine, " ARTIST:", 8) == 0) { |
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201 XS_STILDB_MULTI inLine[eolPos++] = '\n'; |
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202 inLine[eolPos++] = 0; |
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203 xs_pstrcat(&(tmpNode->subTunes[subEntry].pInfo), &inLine[1]); |
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204 } else if (strncmp(inLine, "COMMENT:", 8) == 0) { |
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205 XS_STILDB_MULTI isMulti = TRUE; |
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206 xs_pstrcat(&(tmpNode->subTunes[subEntry].pInfo), inLine); |
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207 } else if (strncmp(inLine, " ", 8) == 0) { |
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208 xs_pstrcat(&(tmpNode->subTunes[subEntry].pInfo), &inLine[8]); |
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209 } |
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|
210 break; |
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|
211 } |
240
f436e16fa6d9
Fixed cosmetic bug in handling of multi-line fields (COMMENT).
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212 |
359
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213 } /* while */ |
240
f436e16fa6d9
Fixed cosmetic bug in handling of multi-line fields (COMMENT).
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214 |
359
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215 /* Check if there is one remaining node */ |
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216 if (tmpNode) |
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217 xs_stildb_node_insert(db, tmpNode); |
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218 |
359
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219 /* Close the file */ |
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220 fclose(inFile); |
109
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221 |
359
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|
222 return 0; |
94
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Start of re-write of STIL-support
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|
223 } |
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|
224 |
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225 |
227
92bad4c7b998
Improved modularization of STIL and song-length database subsystems.
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|
226 /* Compare two nodes |
94
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|
227 */ |
227
92bad4c7b998
Improved modularization of STIL and song-length database subsystems.
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224
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228 static gint xs_stildb_cmp(const void *pNode1, const void *pNode2) |
94
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229 { |
359
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230 /* We assume here that we never ever get NULL-pointers or similar */ |
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231 return strcmp((*(t_xs_stil_node **) pNode1)->pcFilename, (*(t_xs_stil_node **) pNode2)->pcFilename); |
94
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Start of re-write of STIL-support
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232 } |
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Start of re-write of STIL-support
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233 |
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234 |
227
92bad4c7b998
Improved modularization of STIL and song-length database subsystems.
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235 /* (Re)create index |
94
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236 */ |
359
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237 gint xs_stildb_index(t_xs_stildb * db) |
94
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Start of re-write of STIL-support
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238 { |
359
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|
239 t_xs_stil_node *pCurr; |
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240 gint i; |
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|
241 |
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|
242 /* Free old index */ |
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|
243 if (db->ppIndex) { |
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|
244 g_free(db->ppIndex); |
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|
245 db->ppIndex = NULL; |
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|
246 } |
94
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Start of re-write of STIL-support
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|
247 |
359
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|
248 /* Get size of db */ |
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249 pCurr = db->pNodes; |
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250 db->n = 0; |
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251 while (pCurr) { |
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252 db->n++; |
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253 pCurr = pCurr->pNext; |
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254 } |
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255 |
359
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256 /* Check number of nodes */ |
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257 if (db->n > 0) { |
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258 /* Allocate memory for index-table */ |
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259 db->ppIndex = (t_xs_stil_node **) g_malloc(sizeof(t_xs_stil_node *) * db->n); |
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260 if (!db->ppIndex) |
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261 return -1; |
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262 |
359
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263 /* Get node-pointers to table */ |
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264 i = 0; |
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265 pCurr = db->pNodes; |
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266 while (pCurr && (i < db->n)) { |
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267 db->ppIndex[i++] = pCurr; |
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268 pCurr = pCurr->pNext; |
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269 } |
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270 |
359
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271 /* Sort the indexes */ |
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272 qsort(db->ppIndex, db->n, sizeof(t_xs_stil_node *), xs_stildb_cmp); |
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273 } |
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274 |
359
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275 return 0; |
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276 } |
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277 |
227
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278 /* Free a given STIL database |
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279 */ |
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280 void xs_stildb_free(t_xs_stildb * db) |
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281 { |
359
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282 t_xs_stil_node *pCurr, *pNext; |
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283 |
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284 if (!db) |
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285 return; |
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286 |
359
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287 /* Free the memory allocated for nodes */ |
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288 pCurr = db->pNodes; |
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289 while (pCurr) { |
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290 pNext = pCurr->pNext; |
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291 xs_stildb_node_free(pCurr); |
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292 pCurr = pNext; |
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293 } |
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294 |
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295 db->pNodes = NULL; |
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296 |
359
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297 /* Free memory allocated for index */ |
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298 if (db->ppIndex) { |
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299 g_free(db->ppIndex); |
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300 db->ppIndex = NULL; |
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301 } |
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302 |
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303 /* Free structure */ |
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304 db->n = 0; |
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305 g_free(db); |
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306 } |
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307 |
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308 |
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309 /* Get STIL information node from database |
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310 */ |
359
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311 static t_xs_stil_node *xs_stildb_get_node(t_xs_stildb * db, gchar * pcFilename) |
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312 { |
359
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313 gint iStartNode, iEndNode, iQNode, r, i; |
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314 gboolean iFound; |
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315 t_xs_stil_node *pResult; |
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316 |
359
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317 /* Check the database pointers */ |
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318 if (!db || !db->pNodes || !db->ppIndex) |
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319 return NULL; |
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320 |
359
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321 /* Look-up via index using binary search */ |
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322 pResult = NULL; |
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323 iStartNode = 0; |
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324 iEndNode = (db->n - 1); |
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325 iQNode = (iEndNode / 2); |
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326 iFound = FALSE; |
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327 |
369
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328 while ((!iFound) && ((iEndNode - iStartNode) > XS_BIN_BAILOUT)) { |
359
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329 r = strcmp(pcFilename, db->ppIndex[iQNode]->pcFilename); |
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330 if (r < 0) { |
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331 /* Hash was in the <- LEFT side */ |
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332 iEndNode = iQNode; |
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333 iQNode = iStartNode + ((iEndNode - iStartNode) / 2); |
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334 } else if (r > 0) { |
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335 /* Hash was in the RIGHT -> side */ |
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336 iStartNode = iQNode; |
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337 iQNode = iStartNode + ((iEndNode - iStartNode) / 2); |
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338 } else |
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339 iFound = TRUE; |
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340 } |
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341 |
359
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342 /* If not found already */ |
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343 if (!iFound) { |
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344 /* Search the are linearly */ |
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345 iFound = FALSE; |
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346 i = iStartNode; |
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347 while ((i <= iEndNode) && (!iFound)) { |
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348 if (strcmp(pcFilename, db->ppIndex[i]->pcFilename) == 0) |
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349 iFound = TRUE; |
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350 else |
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351 i++; |
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352 } |
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353 |
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354 /* Check the result */ |
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355 if (iFound) |
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356 pResult = db->ppIndex[i]; |
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357 |
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358 } else { |
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359 /* Found via binary search */ |
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360 pResult = db->ppIndex[iQNode]; |
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361 } |
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362 |
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363 return pResult; |
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364 } |
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365 |
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366 |
230 | 367 /* |
368 * These should be moved out of this module some day ... | |
227
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369 */ |
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370 static t_xs_stildb *xs_stildb_db = NULL; |
230 | 371 XS_MUTEX(xs_stildb_db); |
372 | |
373 gint xs_stil_init(void) | |
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374 { |
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375 XS_MUTEX_LOCK(xs_cfg); |
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376 |
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377 if (!xs_cfg.stilDBPath) { |
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378 XS_MUTEX_UNLOCK(xs_cfg); |
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379 return -1; |
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380 } |
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381 |
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382 XS_MUTEX_LOCK(xs_stildb_db); |
230 | 383 |
359
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384 /* Check if already initialized */ |
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385 if (xs_stildb_db) |
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386 xs_stildb_free(xs_stildb_db); |
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387 |
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388 /* Allocate database */ |
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389 xs_stildb_db = (t_xs_stildb *) g_malloc0(sizeof(t_xs_stildb)); |
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390 if (!xs_stildb_db) { |
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391 XS_MUTEX_UNLOCK(xs_cfg); |
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392 XS_MUTEX_UNLOCK(xs_stildb_db); |
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393 return -2; |
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394 } |
230 | 395 |
359
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396 /* Read the database */ |
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397 if (xs_stildb_read(xs_stildb_db, xs_cfg.stilDBPath) != 0) { |
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398 xs_stildb_free(xs_stildb_db); |
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399 xs_stildb_db = NULL; |
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400 XS_MUTEX_UNLOCK(xs_cfg); |
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401 XS_MUTEX_UNLOCK(xs_stildb_db); |
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402 return -3; |
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403 } |
230 | 404 |
359
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405 /* Create index */ |
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406 if (xs_stildb_index(xs_stildb_db) != 0) { |
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407 xs_stildb_free(xs_stildb_db); |
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408 xs_stildb_db = NULL; |
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409 XS_MUTEX_UNLOCK(xs_cfg); |
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410 XS_MUTEX_UNLOCK(xs_stildb_db); |
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411 return -4; |
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412 } |
230 | 413 |
359
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414 XS_MUTEX_UNLOCK(xs_cfg); |
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415 XS_MUTEX_UNLOCK(xs_stildb_db); |
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416 return 0; |
230 | 417 } |
418 | |
419 | |
420 void xs_stil_close(void) | |
421 { | |
359
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422 XS_MUTEX_LOCK(xs_stildb_db); |
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423 xs_stildb_free(xs_stildb_db); |
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424 xs_stildb_db = NULL; |
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425 XS_MUTEX_UNLOCK(xs_stildb_db); |
230 | 426 } |
427 | |
428 | |
359
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429 t_xs_stil_node *xs_stil_get(gchar * pcFilename) |
230 | 430 { |
359
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431 t_xs_stil_node *pResult; |
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432 gchar *tmpFilename; |
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433 |
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434 XS_MUTEX_LOCK(xs_stildb_db); |
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435 XS_MUTEX_LOCK(xs_cfg); |
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436 |
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437 if (xs_cfg.stilDBEnable && xs_stildb_db) { |
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438 if (xs_cfg.hvscPath) { |
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439 /* Remove postfixed directory separator from HVSC-path */ |
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440 tmpFilename = xs_strrchr(xs_cfg.hvscPath, '/'); |
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441 if (tmpFilename && (tmpFilename[1] == 0)) |
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442 tmpFilename[0] = 0; |
230 | 443 |
359
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444 /* Remove HVSC location-prefix from filename */ |
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445 tmpFilename = strstr(pcFilename, xs_cfg.hvscPath); |
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446 if (tmpFilename) |
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447 tmpFilename += strlen(xs_cfg.hvscPath); |
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448 else |
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449 tmpFilename = pcFilename; |
232
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450 } else |
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451 tmpFilename = pcFilename; |
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452 |
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453 pResult = xs_stildb_get_node(xs_stildb_db, tmpFilename); |
230 | 454 } else |
359
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455 pResult = NULL; |
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456 |
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457 XS_MUTEX_UNLOCK(xs_stildb_db); |
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458 XS_MUTEX_UNLOCK(xs_cfg); |
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459 |
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460 return pResult; |
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461 } |