1 /* TUI display source window. 2 3 Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009, 4 2010, 2011 Free Software 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 3 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, see <http://www.gnu.org/licenses/>. */ 22 23 #include "defs.h" 24 #include <ctype.h> 25 #include "symtab.h" 26 #include "frame.h" 27 #include "breakpoint.h" 28 #include "source.h" 29 #include "symtab.h" 30 #include "objfiles.h" 31 #include "filenames.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, 45 int line_no, 46 int noerror) 47 { 48 enum tui_status ret = TUI_FAILURE; 49 50 if (s != (struct symtab *) NULL && s->filename != (char *) NULL) 51 { 52 FILE *stream; 53 int i, desc, c, line_width, nlines; 54 char *src_line = 0; 55 56 if ((ret = tui_alloc_source_buffer (TUI_SRC_WIN)) == TUI_SUCCESS) 57 { 58 line_width = TUI_SRC_WIN->generic.width - 1; 59 /* Take hilite (window border) into account, when 60 calculating the number of lines. */ 61 nlines = (line_no + (TUI_SRC_WIN->generic.height - 2)) - line_no; 62 desc = open_source_file (s); 63 if (desc < 0) 64 { 65 if (!noerror) 66 { 67 char *name = alloca (strlen (s->filename) + 100); 68 69 sprintf (name, "%s:%d", s->filename, line_no); 70 print_sys_errmsg (name, errno); 71 } 72 ret = TUI_FAILURE; 73 } 74 else 75 { 76 if (s->line_charpos == 0) 77 find_source_lines (s, desc); 78 79 if (line_no < 1 || line_no > s->nlines) 80 { 81 close (desc); 82 printf_unfiltered ( 83 "Line number %d out of range; %s has %d lines.\n", 84 line_no, s->filename, s->nlines); 85 } 86 else if (lseek (desc, s->line_charpos[line_no - 1], 0) < 0) 87 { 88 close (desc); 89 perror_with_name (s->filename); 90 } 91 else 92 { 93 int offset, cur_line_no, cur_line, cur_len, threshold; 94 struct tui_gen_win_info *locator 95 = tui_locator_win_info_ptr (); 96 struct tui_source_info *src 97 = &TUI_SRC_WIN->detail.source_info; 98 99 if (TUI_SRC_WIN->generic.title) 100 xfree (TUI_SRC_WIN->generic.title); 101 TUI_SRC_WIN->generic.title = xstrdup (s->filename); 102 103 if (src->filename) 104 xfree (src->filename); 105 src->filename = xstrdup (s->filename); 106 107 /* Determine the threshold for the length of the 108 line and the offset to start the display. */ 109 offset = src->horizontal_offset; 110 threshold = (line_width - 1) + offset; 111 stream = fdopen (desc, FOPEN_RT); 112 clearerr (stream); 113 cur_line = 0; 114 src->gdbarch = get_objfile_arch (s->objfile); 115 src->start_line_or_addr.loa = LOA_LINE; 116 cur_line_no = src->start_line_or_addr.u.line_no = line_no; 117 if (offset > 0) 118 src_line = (char *) xmalloc ( 119 (threshold + 1) * sizeof (char)); 120 while (cur_line < nlines) 121 { 122 struct tui_win_element *element 123 = (struct tui_win_element *) 124 TUI_SRC_WIN->generic.content[cur_line]; 125 126 /* Get the first character in the line. */ 127 c = fgetc (stream); 128 129 if (offset == 0) 130 src_line = ((struct tui_win_element *) 131 TUI_SRC_WIN->generic.content[ 132 cur_line])->which_element.source.line; 133 /* Init the line with the line number. */ 134 sprintf (src_line, "%-6d", cur_line_no); 135 cur_len = strlen (src_line); 136 i = cur_len - ((cur_len / tui_default_tab_len ()) 137 * tui_default_tab_len ()); 138 while (i < tui_default_tab_len ()) 139 { 140 src_line[cur_len] = ' '; 141 i++; 142 cur_len++; 143 } 144 src_line[cur_len] = (char) 0; 145 146 /* Set whether element is the execution point 147 and whether there is a break point on it. */ 148 element->which_element.source.line_or_addr.loa = 149 LOA_LINE; 150 element->which_element.source.line_or_addr.u.line_no = 151 cur_line_no; 152 element->which_element.source.is_exec_point = 153 (filename_cmp (((struct tui_win_element *) 154 locator->content[0])->which_element.locator.file_name, 155 s->filename) == 0 156 && cur_line_no == ((struct tui_win_element *) 157 locator->content[0])->which_element.locator.line_no); 158 if (c != EOF) 159 { 160 i = strlen (src_line) - 1; 161 do 162 { 163 if ((c != '\n') && (c != '\r') 164 && (++i < threshold)) 165 { 166 if (c < 040 && c != '\t') 167 { 168 src_line[i++] = '^'; 169 src_line[i] = c + 0100; 170 } 171 else if (c == 0177) 172 { 173 src_line[i++] = '^'; 174 src_line[i] = '?'; 175 } 176 else 177 { /* Store the charcter in the 178 line buffer. If it is a tab, 179 then translate to the correct 180 number of chars so we don't 181 overwrite our buffer. */ 182 if (c == '\t') 183 { 184 int j, max_tab_len 185 = tui_default_tab_len (); 186 187 for (j = i - ((i / max_tab_len) 188 * max_tab_len); 189 j < max_tab_len 190 && i < threshold; 191 i++, j++) 192 src_line[i] = ' '; 193 i--; 194 } 195 else 196 src_line[i] = c; 197 } 198 src_line[i + 1] = 0; 199 } 200 else 201 { /* If we have not reached EOL, then 202 eat chars until we do. */ 203 while (c != EOF && c != '\n' && c != '\r') 204 c = fgetc (stream); 205 /* Handle non-'\n' end-of-line. */ 206 if (c == '\r' 207 && (c = fgetc (stream)) != '\n' 208 && c != EOF) 209 { 210 ungetc (c, stream); 211 c = '\r'; 212 } 213 214 } 215 } 216 while (c != EOF && c != '\n' && c != '\r' 217 && i < threshold 218 && (c = fgetc (stream))); 219 } 220 /* Now copy the line taking the offset into 221 account. */ 222 if (strlen (src_line) > offset) 223 strcpy (((struct tui_win_element *) 224 TUI_SRC_WIN->generic.content[cur_line])->which_element.source.line, 225 &src_line[offset]); 226 else 227 ((struct tui_win_element *) 228 TUI_SRC_WIN->generic.content[ 229 cur_line])->which_element.source.line[0] = (char) 0; 230 cur_line++; 231 cur_line_no++; 232 } 233 if (offset > 0) 234 xfree (src_line); 235 fclose (stream); 236 TUI_SRC_WIN->generic.content_size = nlines; 237 ret = TUI_SUCCESS; 238 } 239 } 240 } 241 } 242 return ret; 243 } 244 245 246 /* elz: This function sets the contents of the source window to empty 247 except for a line in the middle with a warning message about the 248 source not being available. This function is called by 249 tui_erase_source_contents(), which in turn is invoked when the 250 source files cannot be accessed. */ 251 252 void 253 tui_set_source_content_nil (struct tui_win_info *win_info, 254 char *warning_string) 255 { 256 int line_width; 257 int n_lines; 258 int curr_line = 0; 259 260 line_width = win_info->generic.width - 1; 261 n_lines = win_info->generic.height - 2; 262 263 /* Set to empty each line in the window, except for the one which 264 contains the message. */ 265 while (curr_line < win_info->generic.content_size) 266 { 267 /* Set the information related to each displayed line to null: 268 i.e. the line number is 0, there is no bp, it is not where 269 the program is stopped. */ 270 271 struct tui_win_element *element = 272 (struct tui_win_element *) win_info->generic.content[curr_line]; 273 274 element->which_element.source.line_or_addr.loa = LOA_LINE; 275 element->which_element.source.line_or_addr.u.line_no = 0; 276 element->which_element.source.is_exec_point = FALSE; 277 element->which_element.source.has_break = FALSE; 278 279 /* Set the contents of the line to blank. */ 280 element->which_element.source.line[0] = (char) 0; 281 282 /* If the current line is in the middle of the screen, then we 283 want to display the 'no source available' message in it. 284 Note: the 'weird' arithmetic with the line width and height 285 comes from the function tui_erase_source_content(). We need 286 to keep the screen and the window's actual contents in 287 synch. */ 288 289 if (curr_line == (n_lines / 2 + 1)) 290 { 291 int i; 292 int xpos; 293 int warning_length = strlen (warning_string); 294 char *src_line; 295 296 src_line = element->which_element.source.line; 297 298 if (warning_length >= ((line_width - 1) / 2)) 299 xpos = 1; 300 else 301 xpos = (line_width - 1) / 2 - warning_length; 302 303 for (i = 0; i < xpos; i++) 304 src_line[i] = ' '; 305 306 sprintf (src_line + i, "%s", warning_string); 307 308 for (i = xpos + warning_length; i < line_width; i++) 309 src_line[i] = ' '; 310 311 src_line[i] = '\n'; 312 313 } /* end if */ 314 315 curr_line++; 316 317 } /* end while */ 318 } 319 320 321 /* Function to display source in the source window. This function 322 initializes the horizontal scroll to 0. */ 323 void 324 tui_show_symtab_source (struct gdbarch *gdbarch, struct symtab *s, 325 struct tui_line_or_address line, 326 int noerror) 327 { 328 TUI_SRC_WIN->detail.source_info.horizontal_offset = 0; 329 tui_update_source_window_as_is (TUI_SRC_WIN, gdbarch, s, line, noerror); 330 } 331 332 333 /* Answer whether the source is currently displayed in the source 334 window. */ 335 int 336 tui_source_is_displayed (char *fname) 337 { 338 return (TUI_SRC_WIN->generic.content_in_use 339 && (filename_cmp (((struct tui_win_element *) 340 (tui_locator_win_info_ptr ())-> 341 content[0])->which_element.locator.file_name, 342 fname) == 0)); 343 } 344 345 346 /* Scroll the source forward or backward vertically. */ 347 void 348 tui_vertical_source_scroll (enum tui_scroll_direction scroll_direction, 349 int num_to_scroll) 350 { 351 if (TUI_SRC_WIN->generic.content != NULL) 352 { 353 struct tui_line_or_address l; 354 struct symtab *s; 355 tui_win_content content = (tui_win_content) TUI_SRC_WIN->generic.content; 356 struct symtab_and_line cursal = get_current_source_symtab_and_line (); 357 358 if (cursal.symtab == (struct symtab *) NULL) 359 s = find_pc_symtab (get_frame_pc (get_selected_frame (NULL))); 360 else 361 s = cursal.symtab; 362 363 l.loa = LOA_LINE; 364 if (scroll_direction == FORWARD_SCROLL) 365 { 366 l.u.line_no = content[0]->which_element.source.line_or_addr.u.line_no 367 + num_to_scroll; 368 if (l.u.line_no > s->nlines) 369 /* line = s->nlines - win_info->generic.content_size + 1; */ 370 /* elz: fix for dts 23398. */ 371 l.u.line_no 372 = content[0]->which_element.source.line_or_addr.u.line_no; 373 } 374 else 375 { 376 l.u.line_no = content[0]->which_element.source.line_or_addr.u.line_no 377 - num_to_scroll; 378 if (l.u.line_no <= 0) 379 l.u.line_no = 1; 380 } 381 382 print_source_lines (s, l.u.line_no, l.u.line_no + 1, 0); 383 } 384 } 385