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1 /* Specialized functions to manipulate a set of files. |
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2 Copyright (C) 2007 Free Software Foundation, Inc. |
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3 |
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4 This program is free software; you can redistribute it and/or modify |
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5 it under the terms of the GNU General Public License as published by |
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6 the Free Software Foundation; either version 2, or (at your option) |
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7 any later version. |
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8 |
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9 This program is distributed in the hope that it will be useful, |
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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12 GNU General Public License for more details. |
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13 |
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14 You should have received a copy of the GNU General Public License |
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15 along with this program; if not, write to the Free Software Foundation, |
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16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ |
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17 |
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18 /* written by Jim Meyering */ |
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19 |
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20 #include <config.h> |
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21 #include "file-set.h" |
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22 |
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23 #include "hash-triple.h" |
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24 #include "xalloc.h" |
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25 |
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26 /* Record file, FILE, and dev/ino from *STATS, in the hash table, HT. |
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27 If HT is NULL, return immediately. |
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28 If memory allocation fails, exit immediately. */ |
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29 void |
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30 record_file (Hash_table *ht, char const *file, struct stat const *stats) |
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31 { |
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32 struct F_triple *ent; |
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33 |
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34 if (ht == NULL) |
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35 return; |
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36 |
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37 ent = xmalloc (sizeof *ent); |
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38 ent->name = xstrdup (file); |
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39 ent->st_ino = stats->st_ino; |
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40 ent->st_dev = stats->st_dev; |
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41 |
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42 { |
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43 struct F_triple *ent_from_table = hash_insert (ht, ent); |
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44 if (ent_from_table == NULL) |
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45 { |
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46 /* Insertion failed due to lack of memory. */ |
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47 xalloc_die (); |
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48 } |
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49 |
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50 if (ent_from_table != ent) |
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51 { |
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52 /* There was alread a matching entry in the table, so ENT was |
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53 not inserted. Free it. */ |
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54 triple_free (ent); |
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55 } |
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56 } |
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57 } |
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58 |
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59 /* Return true if there is an entry in hash table, HT, |
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60 for the file described by FILE and STATS. */ |
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61 bool |
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62 seen_file (Hash_table const *ht, char const *file, |
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63 struct stat const *stats) |
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64 { |
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65 struct F_triple new_ent; |
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66 |
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67 if (ht == NULL) |
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68 return false; |
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69 |
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70 new_ent.name = (char *) file; |
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71 new_ent.st_ino = stats->st_ino; |
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72 new_ent.st_dev = stats->st_dev; |
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73 |
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74 return !!hash_lookup (ht, &new_ent); |
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75 } |
