1 /* TUI display source window. 2 3 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software 4 Foundation, Inc. 5 6 Contributed by Hewlett-Packard Company. 7 8 This file is part of GDB. 9 10 This program is free software; you can redistribute it and/or modify 11 it under the terms of the GNU General Public License as published by 12 the Free Software Foundation; either version 2 of the License, or 13 (at your option) any later version. 14 15 This program is distributed in the hope that it will be useful, 16 but WITHOUT ANY WARRANTY; without even the implied warranty of 17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 GNU General Public License for more details. 19 20 You should have received a copy of the GNU General Public License 21 along with this program; if not, write to the Free Software 22 Foundation, Inc., 59 Temple Place - Suite 330, 23 Boston, MA 02111-1307, USA. */ 24 25 #include "defs.h" 26 #include <ctype.h> 27 #include "symtab.h" 28 #include "frame.h" 29 #include "breakpoint.h" 30 #include "source.h" 31 #include "symtab.h" 32 33 #include "tui/tui.h" 34 #include "tui/tui-data.h" 35 #include "tui/tui-stack.h" 36 #include "tui/tui-winsource.h" 37 #include "tui/tui-source.h" 38 39 #include "gdb_string.h" 40 #include "gdb_curses.h" 41 42 /* Function to display source in the source window. */ 43 enum tui_status 44 tui_set_source_content (struct symtab *s, int line_no, int noerror) 45 { 46 enum tui_status ret = TUI_FAILURE; 47 48 if (s != (struct symtab *) NULL && s->filename != (char *) NULL) 49 { 50 FILE *stream; 51 int i, desc, c, line_width, nlines; 52 char *src_line = 0; 53 54 if ((ret = tui_alloc_source_buffer (TUI_SRC_WIN)) == TUI_SUCCESS) 55 { 56 line_width = TUI_SRC_WIN->generic.width - 1; 57 /* Take hilite (window border) into account, when calculating 58 the number of lines */ 59 nlines = (line_no + (TUI_SRC_WIN->generic.height - 2)) - line_no; 60 desc = open_source_file (s); 61 if (desc < 0) 62 { 63 if (!noerror) 64 { 65 char *name = alloca (strlen (s->filename) + 100); 66 sprintf (name, "%s:%d", s->filename, line_no); 67 print_sys_errmsg (name, errno); 68 } 69 ret = TUI_FAILURE; 70 } 71 else 72 { 73 if (s->line_charpos == 0) 74 find_source_lines (s, desc); 75 76 if (line_no < 1 || line_no > s->nlines) 77 { 78 close (desc); 79 printf_unfiltered ( 80 "Line number %d out of range; %s has %d lines.\n", 81 line_no, s->filename, s->nlines); 82 } 83 else if (lseek (desc, s->line_charpos[line_no - 1], 0) < 0) 84 { 85 close (desc); 86 perror_with_name (s->filename); 87 } 88 else 89 { 90 int offset, cur_line_no, cur_line, cur_len, threshold; 91 struct tui_gen_win_info * locator = tui_locator_win_info_ptr (); 92 struct tui_source_info * src = &TUI_SRC_WIN->detail.source_info; 93 94 if (TUI_SRC_WIN->generic.title) 95 xfree (TUI_SRC_WIN->generic.title); 96 TUI_SRC_WIN->generic.title = xstrdup (s->filename); 97 98 if (src->filename) 99 xfree (src->filename); 100 src->filename = xstrdup (s->filename); 101 102 /* Determine the threshold for the length of the line 103 and the offset to start the display. */ 104 offset = src->horizontal_offset; 105 threshold = (line_width - 1) + offset; 106 stream = fdopen (desc, FOPEN_RT); 107 clearerr (stream); 108 cur_line = 0; 109 cur_line_no = src->start_line_or_addr.line_no = line_no; 110 if (offset > 0) 111 src_line = (char *) xmalloc ( 112 (threshold + 1) * sizeof (char)); 113 while (cur_line < nlines) 114 { 115 struct tui_win_element * element = (struct tui_win_element *) 116 TUI_SRC_WIN->generic.content[cur_line]; 117 118 /* get the first character in the line */ 119 c = fgetc (stream); 120 121 if (offset == 0) 122 src_line = ((struct tui_win_element *) 123 TUI_SRC_WIN->generic.content[ 124 cur_line])->which_element.source.line; 125 /* Init the line with the line number */ 126 sprintf (src_line, "%-6d", cur_line_no); 127 cur_len = strlen (src_line); 128 i = cur_len - 129 ((cur_len / tui_default_tab_len ()) * tui_default_tab_len ()); 130 while (i < tui_default_tab_len ()) 131 { 132 src_line[cur_len] = ' '; 133 i++; 134 cur_len++; 135 } 136 src_line[cur_len] = (char) 0; 137 138 /* Set whether element is the execution point and 139 whether there is a break point on it. */ 140 element->which_element.source.line_or_addr.line_no = 141 cur_line_no; 142 element->which_element.source.is_exec_point = 143 (strcmp (((struct tui_win_element *) 144 locator->content[0])->which_element.locator.file_name, 145 s->filename) == 0 146 && cur_line_no == ((struct tui_win_element *) 147 locator->content[0])->which_element.locator.line_no); 148 if (c != EOF) 149 { 150 i = strlen (src_line) - 1; 151 do 152 { 153 if ((c != '\n') && 154 (c != '\r') && (++i < threshold)) 155 { 156 if (c < 040 && c != '\t') 157 { 158 src_line[i++] = '^'; 159 src_line[i] = c + 0100; 160 } 161 else if (c == 0177) 162 { 163 src_line[i++] = '^'; 164 src_line[i] = '?'; 165 } 166 else 167 { /* Store the charcter in the line 168 buffer. If it is a tab, then 169 translate to the correct number of 170 chars so we don't overwrite our 171 buffer. */ 172 if (c == '\t') 173 { 174 int j, max_tab_len = tui_default_tab_len (); 175 176 for (j = i - ( 177 (i / max_tab_len) * max_tab_len); 178 ((j < max_tab_len) && 179 i < threshold); 180 i++, j++) 181 src_line[i] = ' '; 182 i--; 183 } 184 else 185 src_line[i] = c; 186 } 187 src_line[i + 1] = 0; 188 } 189 else 190 { /* If we have not reached EOL, then eat 191 chars until we do */ 192 while (c != EOF && c != '\n' && c != '\r') 193 c = fgetc (stream); 194 } 195 } 196 while (c != EOF && c != '\n' && c != '\r' && 197 i < threshold && (c = fgetc (stream))); 198 } 199 /* Now copy the line taking the offset into account */ 200 if (strlen (src_line) > offset) 201 strcpy (((struct tui_win_element *) TUI_SRC_WIN->generic.content[ 202 cur_line])->which_element.source.line, 203 &src_line[offset]); 204 else 205 ((struct tui_win_element *) 206 TUI_SRC_WIN->generic.content[ 207 cur_line])->which_element.source.line[0] = (char) 0; 208 cur_line++; 209 cur_line_no++; 210 } 211 if (offset > 0) 212 xfree (src_line); 213 fclose (stream); 214 TUI_SRC_WIN->generic.content_size = nlines; 215 ret = TUI_SUCCESS; 216 } 217 } 218 } 219 } 220 return ret; 221 } 222 223 224 /* elz: this function sets the contents of the source window to empty 225 except for a line in the middle with a warning message about the 226 source not being available. This function is called by 227 tui_erase_source_contents(), which in turn is invoked when the 228 source files cannot be accessed. */ 229 230 void 231 tui_set_source_content_nil (struct tui_win_info * win_info, char *warning_string) 232 { 233 int line_width; 234 int n_lines; 235 int curr_line = 0; 236 237 line_width = win_info->generic.width - 1; 238 n_lines = win_info->generic.height - 2; 239 240 /* set to empty each line in the window, except for the one 241 which contains the message */ 242 while (curr_line < win_info->generic.content_size) 243 { 244 /* set the information related to each displayed line 245 to null: i.e. the line number is 0, there is no bp, 246 it is not where the program is stopped */ 247 248 struct tui_win_element * element = 249 (struct tui_win_element *) win_info->generic.content[curr_line]; 250 element->which_element.source.line_or_addr.line_no = 0; 251 element->which_element.source.is_exec_point = FALSE; 252 element->which_element.source.has_break = FALSE; 253 254 /* set the contents of the line to blank */ 255 element->which_element.source.line[0] = (char) 0; 256 257 /* if the current line is in the middle of the screen, then we 258 want to display the 'no source available' message in it. 259 Note: the 'weird' arithmetic with the line width and height 260 comes from the function tui_erase_source_content(). We need 261 to keep the screen and the window's actual contents in synch. */ 262 263 if (curr_line == (n_lines / 2 + 1)) 264 { 265 int i; 266 int xpos; 267 int warning_length = strlen (warning_string); 268 char *src_line; 269 270 src_line = element->which_element.source.line; 271 272 if (warning_length >= ((line_width - 1) / 2)) 273 xpos = 1; 274 else 275 xpos = (line_width - 1) / 2 - warning_length; 276 277 for (i = 0; i < xpos; i++) 278 src_line[i] = ' '; 279 280 sprintf (src_line + i, "%s", warning_string); 281 282 for (i = xpos + warning_length; i < line_width; i++) 283 src_line[i] = ' '; 284 285 src_line[i] = '\n'; 286 287 } /* end if */ 288 289 curr_line++; 290 291 } /* end while */ 292 } 293 294 295 /* Function to display source in the source window. This function 296 initializes the horizontal scroll to 0. */ 297 void 298 tui_show_symtab_source (struct symtab *s, union tui_line_or_address line, int noerror) 299 { 300 TUI_SRC_WIN->detail.source_info.horizontal_offset = 0; 301 tui_update_source_window_as_is (TUI_SRC_WIN, s, line, noerror); 302 } 303 304 305 /* Answer whether the source is currently displayed in the source 306 window. */ 307 int 308 tui_source_is_displayed (char *fname) 309 { 310 return (TUI_SRC_WIN->generic.content_in_use && 311 (strcmp (((struct tui_win_element *) (tui_locator_win_info_ptr ())-> 312 content[0])->which_element.locator.file_name, fname) == 0)); 313 } 314 315 316 /* Scroll the source forward or backward vertically. */ 317 void 318 tui_vertical_source_scroll (enum tui_scroll_direction scroll_direction, 319 int num_to_scroll) 320 { 321 if (TUI_SRC_WIN->generic.content != NULL) 322 { 323 union tui_line_or_address l; 324 struct symtab *s; 325 tui_win_content content = (tui_win_content) TUI_SRC_WIN->generic.content; 326 struct symtab_and_line cursal = get_current_source_symtab_and_line (); 327 328 if (cursal.symtab == (struct symtab *) NULL) 329 s = find_pc_symtab (get_frame_pc (deprecated_selected_frame)); 330 else 331 s = cursal.symtab; 332 333 if (scroll_direction == FORWARD_SCROLL) 334 { 335 l.line_no = content[0]->which_element.source.line_or_addr.line_no + 336 num_to_scroll; 337 if (l.line_no > s->nlines) 338 /*line = s->nlines - win_info->generic.content_size + 1; */ 339 /*elz: fix for dts 23398 */ 340 l.line_no = content[0]->which_element.source.line_or_addr.line_no; 341 } 342 else 343 { 344 l.line_no = content[0]->which_element.source.line_or_addr.line_no - 345 num_to_scroll; 346 if (l.line_no <= 0) 347 l.line_no = 1; 348 } 349 350 print_source_lines (s, l.line_no, l.line_no + 1, 0); 351 } 352 } 353