release-1.10release-1.8release-1.9
Last change
on this file since 4b23009 was
25891a8,
checked in by David Benjamin <davidben@mit.edu>, 13 years ago
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Add a unit test for owl_history
Also fix an off-by-one error in bounding the history size. May as well
have those semantics be coherent and testable.
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-
Property mode set to
100644
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File size:
1.6 KB
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1 | #include "owl.h" |
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2 | |
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3 | void owl_history_init(owl_history *h) |
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4 | { |
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5 | g_queue_init(&h->hist); |
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6 | h->cur = h->hist.tail; /* current position in history */ |
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7 | h->partial = false; /* is the 0th element is partially composed? */ |
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8 | } |
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9 | |
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10 | void owl_history_cleanup(owl_history *h) |
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11 | { |
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12 | g_queue_foreach(&h->hist, (GFunc)g_free, NULL); |
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13 | g_queue_clear(&h->hist); |
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14 | } |
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15 | |
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16 | const char *owl_history_get_prev(owl_history *h) |
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17 | { |
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18 | if (!h) return NULL; |
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19 | |
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20 | if (h->cur == NULL || g_list_previous(h->cur) == NULL) return NULL; |
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21 | |
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22 | h->cur = g_list_previous(h->cur); |
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23 | return h->cur->data; |
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24 | } |
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25 | |
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26 | const char *owl_history_get_next(owl_history *h) |
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27 | { |
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28 | if (!h) return NULL; |
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29 | |
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30 | if (h->cur == NULL || g_list_next(h->cur) == NULL) return NULL; |
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31 | |
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32 | h->cur = g_list_next(h->cur); |
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33 | return h->cur->data; |
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34 | } |
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35 | |
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36 | void owl_history_store(owl_history *h, const char *line, bool partial) |
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37 | { |
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38 | if (!h) return; |
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39 | |
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40 | owl_history_reset(h); |
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41 | |
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42 | /* check if the line is the same as the last */ |
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43 | if (!partial && !g_queue_is_empty(&h->hist) && |
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44 | strcmp(line, g_queue_peek_tail(&h->hist)) == 0) |
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45 | return; |
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46 | |
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47 | /* if we've reached the max history size, pop off the last element */ |
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48 | if (g_queue_get_length(&h->hist) >= OWL_HISTORYSIZE) |
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49 | g_free(g_queue_pop_head(&h->hist)); |
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50 | |
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51 | /* add the new line */ |
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52 | g_queue_push_tail(&h->hist, g_strdup(line)); |
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53 | h->partial = partial; |
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54 | h->cur = h->hist.tail; |
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55 | } |
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56 | |
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57 | void owl_history_reset(owl_history *h) |
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58 | { |
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59 | if (!h) return; |
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60 | |
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61 | /* if partial is set, remove the first entry first */ |
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62 | if (h->partial) { |
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63 | g_free(g_queue_pop_tail(&h->hist)); |
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64 | h->partial = false; |
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65 | } |
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66 | |
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67 | h->cur = h->hist.tail; |
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68 | } |
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69 | |
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70 | int owl_history_is_touched(const owl_history *h) |
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71 | { |
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72 | if (!h) return(0); |
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73 | return h->cur != NULL && g_list_next(h->cur) != NULL; |
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74 | } |
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