| 819 |
|
|
| 820 |
return ret; |
return ret; |
| 821 |
} |
} |
| 822 |
|
|
| 823 |
|
int locate_article_in_section(SECTION_LIST *p_section, const ARTICLE *p_article_cur, int direction, |
| 824 |
|
int *p_page_id, int *p_visible_offset, int *p_article_count) |
| 825 |
|
{ |
| 826 |
|
const ARTICLE *p_article = NULL; |
| 827 |
|
ARTICLE *p_tmp; |
| 828 |
|
int32_t aid = 0; |
| 829 |
|
int page_id; |
| 830 |
|
int offset; |
| 831 |
|
int ret = 0; |
| 832 |
|
int i; |
| 833 |
|
|
| 834 |
|
if (p_section == NULL || p_article_cur == NULL || p_page_id == NULL || p_visible_offset == NULL || p_article_count == NULL) |
| 835 |
|
{ |
| 836 |
|
log_error("locate_article_in_section() NULL pointer error\n"); |
| 837 |
|
return -1; |
| 838 |
|
} |
| 839 |
|
|
| 840 |
|
// acquire lock of section |
| 841 |
|
if ((ret = section_list_rd_lock(p_section)) < 0) |
| 842 |
|
{ |
| 843 |
|
log_error("section_list_rd_lock(sid = %d) error\n", p_section->sid); |
| 844 |
|
return -2; |
| 845 |
|
} |
| 846 |
|
|
| 847 |
|
if (direction == 0) |
| 848 |
|
{ |
| 849 |
|
aid = p_article_cur->aid; |
| 850 |
|
} |
| 851 |
|
else if (direction == 1) |
| 852 |
|
{ |
| 853 |
|
p_article = p_article_cur; |
| 854 |
|
do |
| 855 |
|
{ |
| 856 |
|
p_article = p_article->p_topic_next; |
| 857 |
|
} while (p_article != p_article_cur && p_article->visible == 0); |
| 858 |
|
|
| 859 |
|
aid = (p_article->aid > p_article_cur->aid ? p_article->aid : 0); |
| 860 |
|
} |
| 861 |
|
else if (direction == -1) |
| 862 |
|
{ |
| 863 |
|
p_article = p_article_cur; |
| 864 |
|
do |
| 865 |
|
{ |
| 866 |
|
p_article = p_article->p_topic_prior; |
| 867 |
|
} while (p_article != p_article_cur && p_article->visible == 0); |
| 868 |
|
|
| 869 |
|
aid = (p_article->aid < p_article_cur->aid ? p_article->aid : 0); |
| 870 |
|
} |
| 871 |
|
|
| 872 |
|
p_article = NULL; |
| 873 |
|
|
| 874 |
|
if (aid > 0) |
| 875 |
|
{ |
| 876 |
|
p_article = section_list_find_article_with_offset(p_section, aid, &page_id, &offset, &p_tmp); |
| 877 |
|
if (p_article != NULL) |
| 878 |
|
{ |
| 879 |
|
*p_article_count = (page_id == p_section->page_count - 1 ? p_section->last_page_visible_article_count : BBS_article_limit_per_page); |
| 880 |
|
|
| 881 |
|
p_article = p_section->p_page_first_article[page_id]; |
| 882 |
|
for (i = 0; i < *p_article_count;) |
| 883 |
|
{ |
| 884 |
|
if (p_article->visible) |
| 885 |
|
{ |
| 886 |
|
if (p_article->aid == aid) |
| 887 |
|
{ |
| 888 |
|
*p_page_id = page_id; |
| 889 |
|
*p_visible_offset = i; |
| 890 |
|
break; |
| 891 |
|
} |
| 892 |
|
i++; |
| 893 |
|
if (i >= *p_article_count) |
| 894 |
|
{ |
| 895 |
|
log_error("Visible article (aid=%d) not found in page %d\n", aid, page_id); |
| 896 |
|
p_article = NULL; |
| 897 |
|
} |
| 898 |
|
} |
| 899 |
|
p_article = p_article->p_next; |
| 900 |
|
} |
| 901 |
|
} |
| 902 |
|
} |
| 903 |
|
|
| 904 |
|
// release lock of section |
| 905 |
|
if (section_list_rd_unlock(p_section) < 0) |
| 906 |
|
{ |
| 907 |
|
log_error("section_list_rd_unlock(sid = %d) error\n", p_section->sid); |
| 908 |
|
ret = -2; |
| 909 |
|
} |
| 910 |
|
|
| 911 |
|
return (ret < 0 ? ret : (p_article == NULL ? 0 : 1)); |
| 912 |
|
} |
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