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annotate mcabber/src/hbuf.c @ 1351:43e777a5ff06
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author | Mikael Berthe <mikael@lilotux.net> |
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date | Sat, 10 Nov 2007 22:28:16 +0100 |
parents | e42f48103609 |
children | ff1f6facdc0c |
rev | line source |
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71 | 1 /* |
2 * hbuf.c -- History buffer implementation | |
393 | 3 * |
1205 | 4 * Copyright (C) 2005-2007 Mikael Berthe <mikael@lilotux.net> |
71 | 5 * |
6 * This program is free software; you can redistribute it and/or modify | |
7 * it under the terms of the GNU General Public License as published by | |
8 * the Free Software Foundation; either version 2 of the License, or (at | |
9 * your option) any later version. | |
10 * | |
11 * This program is distributed in the hope that it will be useful, but | |
12 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 * General Public License for more details. | |
15 * | |
16 * You should have received a copy of the GNU General Public License | |
17 * along with this program; if not, write to the Free Software | |
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
19 * USA | |
20 */ | |
21 | |
22 #include <string.h> | |
23 | |
24 #include "hbuf.h" | |
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25 #include "utils.h" |
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26 #include "utf8.h" |
71 | 27 |
28 | |
29 /* This is a private structure type */ | |
30 | |
31 typedef struct { | |
32 char *ptr; | |
182 | 33 char *ptr_end; // beginning of the block |
34 char *ptr_end_alloc; // end of the current persistent block | |
71 | 35 guchar flags; |
36 | |
37 // XXX This should certainly be a pointer, and be allocated only when needed | |
38 // (for ex. when HBB_FLAG_PERSISTENT is set). | |
39 struct { // hbuf_line_info | |
184 | 40 time_t timestamp; |
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41 unsigned mucnicklen; |
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42 guint flags; |
184 | 43 } prefix; |
71 | 44 } hbuf_block; |
45 | |
46 | |
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47 // do_wrap(p_hbuf, first_hbuf_elt, width) |
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48 // Wrap hbuf lines with the specified width. |
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49 // '\n' are handled by this routine (they are removed and persistent lines |
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50 // are created). |
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51 // All hbuf elements are processed, starting from first_hbuf_elt. |
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52 static inline void do_wrap(GList **p_hbuf, GList *first_hbuf_elt, |
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53 unsigned int width) |
71 | 54 { |
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55 GList *curr_elt = first_hbuf_elt; |
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56 |
71 | 57 // Let's add non-persistent blocs if necessary |
58 // - If there are '\n' in the string | |
59 // - If length > width (and width != 0) | |
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60 while (curr_elt) { |
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61 hbuf_block *hbuf_b_curr, *hbuf_b_prev; |
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62 char *c, *end; |
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63 char *br = NULL; // break pointer |
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64 char *cr = NULL; // CR pointer |
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65 unsigned int cur_w = 0; |
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66 |
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67 // We want to break where we can find a space char or a CR |
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68 |
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69 hbuf_b_curr = (hbuf_block*)(curr_elt->data); |
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70 hbuf_b_prev = hbuf_b_curr; |
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71 c = hbuf_b_curr->ptr; |
71 | 72 |
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73 while (*c && (!width || cur_w <= width)) { |
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74 if (*c == '\n') { |
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75 br = cr = c; |
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76 *c = 0; |
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77 break; |
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78 } |
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79 if (iswblank(get_char(c))) |
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80 br = c; |
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81 cur_w += get_char_width(c); |
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82 c = next_char(c); |
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83 } |
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84 |
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85 if (cr || (*c && cur_w > width)) { |
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86 if (!br || br == hbuf_b_curr->ptr) |
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87 br = c; |
71 | 88 else |
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89 br = next_char(br); |
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90 end = hbuf_b_curr->ptr_end; |
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91 hbuf_b_curr->ptr_end = br; |
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92 // Create another block |
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93 hbuf_b_curr = g_new0(hbuf_block, 1); |
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94 // The block must be persistent after a CR |
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95 if (cr) { |
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96 hbuf_b_curr->ptr = hbuf_b_prev->ptr_end + 1; // == cr+1 |
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97 hbuf_b_curr->flags = HBB_FLAG_PERSISTENT; |
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98 } else { |
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99 hbuf_b_curr->ptr = hbuf_b_prev->ptr_end; // == br |
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100 hbuf_b_curr->flags = 0; |
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101 } |
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102 hbuf_b_curr->ptr_end = end; |
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103 hbuf_b_curr->ptr_end_alloc = hbuf_b_prev->ptr_end_alloc; |
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104 // This is OK because insert_before(NULL) == append(): |
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105 *p_hbuf = g_list_insert_before(*p_hbuf, curr_elt->next, hbuf_b_curr); |
71 | 106 } |
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107 curr_elt = g_list_next(curr_elt); |
71 | 108 } |
109 } | |
110 | |
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111 // hbuf_add_line(p_hbuf, text, prefix_flags, width, maxhbufblocks) |
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112 // Add a line to the given buffer. If width is not null, then lines are |
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113 // wrapped at this length. |
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114 // maxhbufblocks is the maximum number of hbuf blocks we can allocate. If |
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115 // null, there is no limit. If non-null, it should be >= 2. |
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116 // |
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117 // Note 1: Splitting according to width won't work if there are tabs; they |
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118 // should be expanded before. |
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119 // Note 2: width does not include the ending \0. |
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120 void hbuf_add_line(GList **p_hbuf, const char *text, time_t timestamp, |
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121 guint prefix_flags, guint width, guint maxhbufblocks, |
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122 unsigned mucnicklen) |
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123 { |
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124 GList *curr_elt; |
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125 char *line; |
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126 hbuf_block *hbuf_block_elt; |
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127 |
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128 if (!text) return; |
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129 |
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130 hbuf_block_elt = g_new0(hbuf_block, 1); |
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131 hbuf_block_elt->prefix.timestamp = timestamp; |
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132 hbuf_block_elt->prefix.flags = prefix_flags; |
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133 hbuf_block_elt->prefix.mucnicklen = mucnicklen; |
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134 if (!*p_hbuf) { |
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135 hbuf_block_elt->ptr = g_new(char, HBB_BLOCKSIZE); |
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136 hbuf_block_elt->flags = HBB_FLAG_ALLOC | HBB_FLAG_PERSISTENT; |
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137 hbuf_block_elt->ptr_end_alloc = hbuf_block_elt->ptr + HBB_BLOCKSIZE; |
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138 } else { |
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139 hbuf_block *hbuf_b_prev; |
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140 // Set p_hbuf to the end of the list, to speed up history loading |
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141 // (or CPU time will be used by g_list_last() for each line) |
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142 *p_hbuf = g_list_last(*p_hbuf); |
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143 hbuf_b_prev = (*p_hbuf)->data; |
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144 hbuf_block_elt->ptr = hbuf_b_prev->ptr_end; |
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145 hbuf_block_elt->flags = HBB_FLAG_PERSISTENT; |
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146 hbuf_block_elt->ptr_end_alloc = hbuf_b_prev->ptr_end_alloc; |
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147 } |
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148 *p_hbuf = g_list_append(*p_hbuf, hbuf_block_elt); |
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149 |
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150 if (strlen(text) >= HBB_BLOCKSIZE) { |
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151 // Too long |
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152 text = "[ERR:LINE_TOO_LONG]"; |
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153 hbuf_block_elt->prefix.flags |= HBB_PREFIX_INFO; |
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154 } |
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155 |
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156 if (hbuf_block_elt->ptr + strlen(text) >= hbuf_block_elt->ptr_end_alloc) { |
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157 // Too long for the current allocated bloc, we need another one |
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158 if (!maxhbufblocks) { |
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159 // No limit, let's allocate a new block |
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160 hbuf_block_elt->ptr = g_new0(char, HBB_BLOCKSIZE); |
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161 } else { |
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162 GList *hbuf_head, *hbuf_elt; |
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163 hbuf_block *hbuf_b_elt; |
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164 guint n = 0; |
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165 hbuf_head = g_list_first(*p_hbuf); |
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166 // We need at least 2 allocated blocks |
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167 if (maxhbufblocks == 1) |
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168 maxhbufblocks = 2; |
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169 // Let's count the number of allocated areas |
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170 for (hbuf_elt = hbuf_head; hbuf_elt; hbuf_elt = g_list_next(hbuf_elt)) { |
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171 hbuf_b_elt = (hbuf_block*)(hbuf_elt->data); |
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172 if (hbuf_b_elt->flags & HBB_FLAG_ALLOC) |
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173 n++; |
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174 } |
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175 // If we can't allocate a new area, reuse the previous block(s) |
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176 if (n < maxhbufblocks) { |
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177 hbuf_block_elt->ptr = g_new0(char, HBB_BLOCKSIZE); |
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178 } else { |
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179 // Let's use an old block, and free the extra blocks if needed |
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180 char *allocated_block = NULL; |
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181 while (n >= maxhbufblocks) { |
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182 int start_of_block = 1; |
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183 for (hbuf_elt = hbuf_head; hbuf_elt; hbuf_elt = hbuf_head) { |
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184 hbuf_b_elt = (hbuf_block*)(hbuf_elt->data); |
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185 if (hbuf_b_elt->flags & HBB_FLAG_ALLOC) { |
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186 if (start_of_block-- == 0) |
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187 break; |
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188 if (n == maxhbufblocks) |
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189 allocated_block = hbuf_b_elt->ptr; |
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190 else |
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191 g_free(hbuf_b_elt->ptr); |
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192 } |
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193 g_free(hbuf_b_elt); |
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194 hbuf_head = *p_hbuf = g_list_delete_link(hbuf_head, hbuf_elt); |
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195 } |
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196 n--; |
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197 } |
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198 memset(allocated_block, 0, HBB_BLOCKSIZE); |
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199 hbuf_block_elt->ptr = allocated_block; |
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200 } |
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201 } |
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202 hbuf_block_elt->flags = HBB_FLAG_ALLOC | HBB_FLAG_PERSISTENT; |
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203 hbuf_block_elt->ptr_end_alloc = hbuf_block_elt->ptr + HBB_BLOCKSIZE; |
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204 } |
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205 |
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206 line = hbuf_block_elt->ptr; |
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207 // Ok, now we can copy the text.. |
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208 strcpy(line, text); |
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209 hbuf_block_elt->ptr_end = line + strlen(line) + 1; |
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210 |
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211 curr_elt = g_list_last(*p_hbuf); |
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212 |
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213 // Wrap lines and handle CRs ('\n') |
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214 do_wrap(p_hbuf, curr_elt, width); |
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215 } |
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216 |
71 | 217 // hbuf_free() |
218 // Destroys all hbuf list. | |
219 void hbuf_free(GList **p_hbuf) | |
220 { | |
221 hbuf_block *hbuf_b_elt; | |
222 GList *hbuf_elt; | |
223 GList *first_elt = g_list_first(*p_hbuf); | |
224 | |
225 for (hbuf_elt = first_elt; hbuf_elt; hbuf_elt = g_list_next(hbuf_elt)) { | |
226 hbuf_b_elt = (hbuf_block*)(hbuf_elt->data); | |
227 if (hbuf_b_elt->flags & HBB_FLAG_ALLOC) { | |
228 g_free(hbuf_b_elt->ptr); | |
229 } | |
390 | 230 g_free(hbuf_b_elt); |
71 | 231 } |
232 | |
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233 g_list_free(first_elt); |
71 | 234 *p_hbuf = NULL; |
235 } | |
236 | |
237 // hbuf_rebuild() | |
238 // Rebuild all hbuf list, with the new width. | |
239 // If width == 0, lines are not wrapped. | |
240 void hbuf_rebuild(GList **p_hbuf, unsigned int width) | |
241 { | |
242 GList *first_elt, *curr_elt, *next_elt; | |
243 hbuf_block *hbuf_b_curr, *hbuf_b_next; | |
244 | |
150 | 245 // *p_hbuf needs to be the head of the list |
246 first_elt = *p_hbuf = g_list_first(*p_hbuf); | |
71 | 247 |
248 // #1 Remove non-persistent blocks (ptr_end should be updated!) | |
249 curr_elt = first_elt; | |
250 while (curr_elt) { | |
251 next_elt = g_list_next(curr_elt); | |
252 // Last element? | |
253 if (!next_elt) | |
254 break; | |
255 hbuf_b_curr = (hbuf_block*)(curr_elt->data); | |
256 hbuf_b_next = (hbuf_block*)(next_elt->data); | |
257 // Is next line not-persistent? | |
258 if (!(hbuf_b_next->flags & HBB_FLAG_PERSISTENT)) { | |
259 hbuf_b_curr->ptr_end = hbuf_b_next->ptr_end; | |
390 | 260 g_free(hbuf_b_next); |
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261 curr_elt = g_list_delete_link(curr_elt, next_elt); |
393 | 262 } else |
71 | 263 curr_elt = next_elt; |
264 } | |
265 // #2 Go back to head and create non-persistent blocks when needed | |
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266 if (width) |
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267 do_wrap(p_hbuf, first_elt, width); |
71 | 268 } |
269 | |
189 | 270 // hbuf_previous_persistent() |
271 // Returns the previous persistent block (line). If the given line is | |
272 // persistent, then it is returned. | |
273 // This function is used for example when resizing a buffer. If the top of the | |
274 // screen is on a non-persistent block, then a screen resize could destroy this | |
275 // line... | |
276 GList *hbuf_previous_persistent(GList *l_line) | |
277 { | |
278 hbuf_block *hbuf_b_elt; | |
279 | |
280 while (l_line) { | |
281 hbuf_b_elt = (hbuf_block*)l_line->data; | |
282 if (hbuf_b_elt->flags & HBB_FLAG_PERSISTENT) | |
283 return l_line; | |
284 l_line = g_list_previous(l_line); | |
285 } | |
286 | |
287 return NULL; | |
288 } | |
289 | |
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290 // hbuf_get_lines(hbuf, n) |
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291 // Returns an array of n hbb_line pointers |
71 | 292 // (The first line will be the line currently pointed by hbuf) |
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293 // Note: The caller should free the array, the hbb_line pointers and the |
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294 // text pointers after use. |
184 | 295 hbb_line **hbuf_get_lines(GList *hbuf, unsigned int n) |
71 | 296 { |
297 unsigned int i; | |
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298 hbuf_block *blk; |
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299 guint last_persist_prefixflags = 0; |
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300 GList *last_persist; // last persistent flags |
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301 hbb_line **array, **array_elt; |
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302 |
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303 // To be able to correctly highlight multi-line messages, |
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304 // we need to look at the last non-null prefix, which should be the first |
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305 // line of the message. |
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306 last_persist = hbuf_previous_persistent(hbuf); |
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307 while (last_persist) { |
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308 blk = (hbuf_block*)last_persist->data; |
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309 if ((blk->flags & HBB_FLAG_PERSISTENT) && blk->prefix.flags) { |
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310 last_persist_prefixflags = blk->prefix.flags; |
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311 break; |
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312 } |
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313 last_persist = g_list_previous(last_persist); |
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314 } |
71 | 315 |
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316 array = g_new0(hbb_line*, n); |
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317 array_elt = array; |
71 | 318 |
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319 for (i = 0 ; i < n ; i++) { |
71 | 320 if (hbuf) { |
321 int maxlen; | |
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322 blk = (hbuf_block*)(hbuf->data); |
71 | 323 maxlen = blk->ptr_end - blk->ptr; |
184 | 324 *array_elt = (hbb_line*)g_new(hbb_line, 1); |
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325 (*array_elt)->timestamp = blk->prefix.timestamp; |
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326 (*array_elt)->flags = blk->prefix.flags; |
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327 (*array_elt)->mucnicklen = blk->prefix.mucnicklen; |
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328 (*array_elt)->text = g_strndup(blk->ptr, maxlen); |
184 | 329 |
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Mikael Berthe <mikael@lilotux.net>
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729
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330 if ((blk->flags & HBB_FLAG_PERSISTENT) && blk->prefix.flags) { |
729
39f67cade02c
Use bold font for outgoing messages
Mikael Berthe <mikael@lilotux.net>
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699
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331 last_persist_prefixflags = blk->prefix.flags; |
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Use bold font for outgoing messages
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332 } else { |
1204
e802ec0c02d2
Basic support for nick highlighting in MUC rooms (the whole line is colored)
Mikael Berthe <mikael@lilotux.net>
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1141
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333 // Propagate highlighting flags |
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Basic support for nick highlighting in MUC rooms (the whole line is colored)
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334 (*array_elt)->flags |= last_persist_prefixflags & |
1268
dbc907b2d92f
Add configurable colors for info and incoming messages (Michal 'vorner' Vaner)
Mikael Berthe <mikael@lilotux.net>
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1241
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335 (HBB_PREFIX_HLIGHT_OUT | HBB_PREFIX_HLIGHT | |
dbc907b2d92f
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336 HBB_PREFIX_INFO | HBB_PREFIX_IN); |
dbc907b2d92f
Add configurable colors for info and incoming messages (Michal 'vorner' Vaner)
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parents:
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337 //Continuation of a message - omit the prefix |
dbc907b2d92f
Add configurable colors for info and incoming messages (Michal 'vorner' Vaner)
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338 (*array_elt)->flags |= HBB_PREFIX_CONT; |
1290
e42f48103609
Drawing the MUC nicks by a different color
Michal 'vorner' Vaner <vorner@ucw.cz>
parents:
1268
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339 (*array_elt)->mucnicklen = 0;//The nick is in the first one |
729
39f67cade02c
Use bold font for outgoing messages
Mikael Berthe <mikael@lilotux.net>
parents:
699
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340 } |
39f67cade02c
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341 |
71 | 342 hbuf = g_list_next(hbuf); |
343 } else | |
184 | 344 break; |
345 | |
346 array_elt++; | |
71 | 347 } |
348 | |
349 return array; | |
350 } | |
351 | |
370
dd9e2eb52916
Add /buffer search_{backward,forward}
Mikael Berthe <mikael@lilotux.net>
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352 // hbuf_search(hbuf, direction, string) |
dd9e2eb52916
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353 // Look backward/forward for a line containing string in the history buffer |
dd9e2eb52916
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354 // Search starts at hbuf, and goes forward if direction == 1, backward if -1 |
dd9e2eb52916
Add /buffer search_{backward,forward}
Mikael Berthe <mikael@lilotux.net>
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355 GList *hbuf_search(GList *hbuf, int direction, const char *string) |
dd9e2eb52916
Add /buffer search_{backward,forward}
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356 { |
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357 hbuf_block *blk; |
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358 |
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359 for (;;) { |
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360 if (direction > 0) |
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368
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361 hbuf = g_list_next(hbuf); |
dd9e2eb52916
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Mikael Berthe <mikael@lilotux.net>
parents:
368
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362 else |
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363 hbuf = g_list_previous(hbuf); |
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364 |
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365 if (!hbuf) break; |
dd9e2eb52916
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parents:
368
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366 |
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367 blk = (hbuf_block*)(hbuf->data); |
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368 // XXX blk->ptr is (maybe) not really correct, because the match should |
dd9e2eb52916
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369 // not be after ptr_end. We should check that... |
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370 if (strcasestr(blk->ptr, string)) |
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371 break; |
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372 } |
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parents:
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373 |
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374 return hbuf; |
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375 } |
462 | 376 |
464 | 377 // hbuf_jump_date(hbuf, t) |
378 // Return a pointer to the first line after date t in the history buffer | |
379 GList *hbuf_jump_date(GList *hbuf, time_t t) | |
380 { | |
381 hbuf_block *blk; | |
382 | |
383 hbuf = g_list_first(hbuf); | |
384 | |
385 for ( ; hbuf && g_list_next(hbuf); hbuf = g_list_next(hbuf)) { | |
386 blk = (hbuf_block*)(hbuf->data); | |
387 if (blk->prefix.timestamp >= t) break; | |
388 } | |
389 | |
390 return hbuf; | |
391 } | |
392 | |
462 | 393 // hbuf_jump_percent(hbuf, pc) |
394 // Return a pointer to the line at % pc of the history buffer | |
395 GList *hbuf_jump_percent(GList *hbuf, int pc) | |
396 { | |
397 guint hlen; | |
398 | |
399 hbuf = g_list_first(hbuf); | |
400 hlen = g_list_length(hbuf); | |
401 | |
402 return g_list_nth(hbuf, pc*hlen/100); | |
403 } | |
576 | 404 |
1227
79c396678f1b
Make buffer list display the number of allocated HBB blocks
Mikael Berthe <mikael@lilotux.net>
parents:
1205
diff
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405 #ifdef DEBUG_ENABLE |
79c396678f1b
Make buffer list display the number of allocated HBB blocks
Mikael Berthe <mikael@lilotux.net>
parents:
1205
diff
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406 // hbuf_get_blocks_number() |
79c396678f1b
Make buffer list display the number of allocated HBB blocks
Mikael Berthe <mikael@lilotux.net>
parents:
1205
diff
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407 // Returns the number of allocated hbuf_block's. |
79c396678f1b
Make buffer list display the number of allocated HBB blocks
Mikael Berthe <mikael@lilotux.net>
parents:
1205
diff
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408 guint hbuf_get_blocks_number(GList *hbuf) |
79c396678f1b
Make buffer list display the number of allocated HBB blocks
Mikael Berthe <mikael@lilotux.net>
parents:
1205
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409 { |
79c396678f1b
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Mikael Berthe <mikael@lilotux.net>
parents:
1205
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410 hbuf_block *hbuf_b_elt; |
79c396678f1b
Make buffer list display the number of allocated HBB blocks
Mikael Berthe <mikael@lilotux.net>
parents:
1205
diff
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411 guint count = 0U; |
79c396678f1b
Make buffer list display the number of allocated HBB blocks
Mikael Berthe <mikael@lilotux.net>
parents:
1205
diff
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412 |
79c396678f1b
Make buffer list display the number of allocated HBB blocks
Mikael Berthe <mikael@lilotux.net>
parents:
1205
diff
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413 for (hbuf = g_list_first(hbuf); hbuf; hbuf = g_list_next(hbuf)) { |
79c396678f1b
Make buffer list display the number of allocated HBB blocks
Mikael Berthe <mikael@lilotux.net>
parents:
1205
diff
changeset
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414 hbuf_b_elt = (hbuf_block*)(hbuf->data); |
79c396678f1b
Make buffer list display the number of allocated HBB blocks
Mikael Berthe <mikael@lilotux.net>
parents:
1205
diff
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415 if (hbuf_b_elt->flags & HBB_FLAG_ALLOC) |
79c396678f1b
Make buffer list display the number of allocated HBB blocks
Mikael Berthe <mikael@lilotux.net>
parents:
1205
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416 count++; |
79c396678f1b
Make buffer list display the number of allocated HBB blocks
Mikael Berthe <mikael@lilotux.net>
parents:
1205
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417 } |
79c396678f1b
Make buffer list display the number of allocated HBB blocks
Mikael Berthe <mikael@lilotux.net>
parents:
1205
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418 return count; |
79c396678f1b
Make buffer list display the number of allocated HBB blocks
Mikael Berthe <mikael@lilotux.net>
parents:
1205
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419 } |
79c396678f1b
Make buffer list display the number of allocated HBB blocks
Mikael Berthe <mikael@lilotux.net>
parents:
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420 #endif |
79c396678f1b
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parents:
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421 |
580 | 422 /* vim: set expandtab cindent cinoptions=>2\:2(0: For Vim users... */ |