I found the nice TUI mode of gdb and thought syntax highlighting would be nice.
I came up with the following simple (line-based) solution:
--- gdb/tui/tui.c 2013-02-03 17:16:42 +0100
+++ gdb/tui/tui.c 2013-05-10 13:47:36 +0200
@@ -58,6 +58,10 @@
/* Tells whether the TUI is active or not. */
int tui_active = 0;
static int tui_finish_init = 1;
+#ifdef TUI_SYNTAX_HIGHLIGHT
+int tui_can_syntax_highlight = 0;
+int tui_color_tab[5];
+#endif
enum tui_key_mode tui_current_key_mode = TUI_COMMAND_MODE;
@@ -401,6 +405,30 @@
keypad (TUI_CMD_WIN->generic.handle, TRUE);
wrefresh (TUI_CMD_WIN->generic.handle);
tui_finish_init = 0;
+
+#ifdef TUI_SYNTAX_HIGHLIGHT
+ if (has_colors())
+ {
+ start_color();
+
+ init_pair (1,COLOR_MAGENTA,COLOR_BLACK);
+ tui_color_tab[0] = COLOR_PAIR (1) | A_BOLD;
+
+ init_pair (2,COLOR_GREEN,COLOR_BLACK);
+ tui_color_tab[1] = COLOR_PAIR (2) | A_BOLD;
+
+ init_pair (3,COLOR_YELLOW,COLOR_BLACK);
+ tui_color_tab[2] = COLOR_PAIR (3) | A_BOLD;
+
+ init_pair (4,COLOR_BLUE,COLOR_BLACK);
+ tui_color_tab[3] = COLOR_PAIR (4) | A_BOLD;
+
+ init_pair (5,COLOR_CYAN,COLOR_BLACK);
+ tui_color_tab[4] = COLOR_PAIR (5) | A_BOLD;
+
+ tui_can_syntax_highlight = 1;
+ }
+#endif
}
else
{
--- gdb/tui/tui-source.c 2013-02-03 17:16:42 +0100
+++ gdb/tui/tui-source.c 2013-05-10 13:19:09 +0200
@@ -28,6 +28,7 @@
#include "symtab.h"
#include "objfiles.h"
#include "filenames.h"
+#include "language.h"
#include "tui/tui.h"
#include "tui/tui-data.h"
@@ -38,6 +39,466 @@
#include "gdb_string.h"
#include "gdb_curses.h"
+
+#ifdef TUI_SYNTAX_HIGHLIGHT
+extern int tui_can_syntax_highlight;
+
+static const char *syntax_type_c_3[] = {
+ "int",
+ NULL
+};
+static const char *syntax_type_c_4[] = {
+ "auto",
+ "char",
+ "enum",
+ "long",
+ "void",
+ NULL
+};
+static const char *syntax_type_c_5[] = {
+ "const",
+ "float",
+ "short",
+ "union",
+ NULL
+};
+static const char *syntax_type_c_6[] = {
+ "double",
+ "extern",
+ "inline",
+ "signed",
+ "static",
+ "struct",
+ NULL
+};
+static const char *syntax_type_c_7[] = {
+ "typedef",
+ NULL
+};
+static const char *syntax_type_c_8[] = {
+ "unsigned",
+ "register",
+ "restrict",
+ "volatile",
+ NULL
+};
+static const char **syntax_type_c[] = {
+ NULL,
+ NULL,
+ syntax_type_c_3,
+ syntax_type_c_4,
+ syntax_type_c_5,
+ syntax_type_c_6,
+ syntax_type_c_7,
+ syntax_type_c_8,
+};
+
+static const char *syntax_type_cpp_4[] = {
+ "bool",
+ NULL
+};
+static const char *syntax_type_cpp_5[] = {
+ "class",
+ NULL
+};
+static const char *syntax_type_cpp_6[] = {
+ "export",
+ NULL
+};
+static const char *syntax_type_cpp_7[] = {
+ "mutable",
+ "virtual",
+ NULL
+};
+static const char *syntax_type_cpp_8[] = {
+ "explicit",
+ "template",
+ "typename",
+ NULL
+};
+static const char *syntax_type_cpp_9[] = {
+ "namespace",
+ NULL
+};
+static const char **syntax_type_cpp[] = {
+ NULL,
+ NULL,
+ NULL,
+ syntax_type_cpp_4,
+ syntax_type_cpp_5,
+ syntax_type_cpp_6,
+ syntax_type_cpp_7,
+ syntax_type_cpp_8,
+ syntax_type_cpp_9,
+};
+
+static const char *syntax_keyword_c_2[] = {
+ "do",
+ "if",
+ NULL
+};
+static const char *syntax_keyword_c_3[] = {
+ "asm",
+ "for",
+ NULL
+};
+static const char *syntax_keyword_c_4[] = {
+ "case",
+ "else",
+ "goto",
+ NULL
+};
+static const char *syntax_keyword_c_5[] = {
+ "break",
+ "while",
+ NULL
+};
+static const char *syntax_keyword_c_6[] = {
+ "return",
+ "sizeof",
+ "switch",
+ NULL
+};
+static const char *syntax_keyword_c_7[] = {
+ "default",
+ NULL
+};
+static const char *syntax_keyword_c_8[] = {
+ "continue",
+ NULL
+};
+static const char **syntax_keyword_c[] = {
+ NULL,
+ syntax_keyword_c_2,
+ syntax_keyword_c_3,
+ syntax_keyword_c_4,
+ syntax_keyword_c_5,
+ syntax_keyword_c_6,
+ syntax_keyword_c_7,
+ syntax_keyword_c_8,
+};
+
+static const char *syntax_keyword_cpp_3[] = {
+ "new",
+ "try",
+ NULL
+};
+static const char *syntax_keyword_cpp_4[] = {
+ "this",
+ NULL
+};
+static const char *syntax_keyword_cpp_5[] = {
+ "catch",
+ "throw",
+ "using",
+ NULL
+};
+static const char *syntax_keyword_cpp_6[] = {
+ "delete",
+ "friend",
+ "public",
+ "typeid",
+ NULL
+};
+static const char *syntax_keyword_cpp_7[] = {
+ "private",
+ NULL
+};
+static const char *syntax_keyword_cpp_8[] = {
+ "operator",
+ NULL
+};
+static const char *syntax_keyword_cpp_9[] = {
+ "protected",
+ NULL
+};
+static const char *syntax_keyword_cpp_10[] = {
+ "const_cast",
+ NULL
+};
+static const char *syntax_keyword_cpp_11[] = {
+ "static_cast",
+ NULL
+};
+static const char *syntax_keyword_cpp_12[] = {
+ "dynamic_cast",
+ NULL
+};
+static const char *syntax_keyword_cpp_16[] = {
+ "reinterpret_cast",
+ NULL
+};
+static const char **syntax_keyword_cpp[] = {
+ NULL,
+ NULL,
+ syntax_keyword_cpp_3,
+ syntax_keyword_cpp_4,
+ syntax_keyword_cpp_5,
+ syntax_keyword_cpp_6,
+ syntax_keyword_cpp_7,
+ syntax_keyword_cpp_8,
+ syntax_keyword_cpp_9,
+ syntax_keyword_cpp_10,
+ syntax_keyword_cpp_11,
+ syntax_keyword_cpp_12,
+ NULL,
+ NULL,
+ NULL,
+ syntax_keyword_cpp_16,
+};
+
+static const char *syntax_preproc_2[] = {
+ "if",
+ NULL
+};
+static const char *syntax_preproc_4[] = {
+ "else",
+ "warn",
+ NULL
+};
+static const char *syntax_preproc_5[] = {
+ "ifdef",
+ "endif",
+ "error",
+ "undef",
+ NULL
+};
+static const char *syntax_preproc_6[] = {
+ "define",
+ "ifndef",
+ "pragma",
+ NULL
+};
+static const char *syntax_preproc_7[] = {
+ "include",
+ NULL
+};
+static const char **syntax_preproc[] = {
+ NULL,
+ syntax_preproc_2,
+ NULL,
+ syntax_preproc_4,
+ syntax_preproc_5,
+ syntax_preproc_6,
+ syntax_preproc_7,
+};
+
+static const char *syntax_literal_4[] = {
+ "NULL",
+ "true",
+ NULL
+};
+static const char *syntax_literal_5[] = {
+ "false",
+ NULL
+};
+static const char **syntax_literal[] = {
+ NULL,
+ NULL,
+ NULL,
+ syntax_literal_4,
+ syntax_literal_5,
+};
+
+#define SYNTAX_HIGHLIGHT_EXTRA 16
+
+static int tui_keyword_highlight (const char *word,
+ char *color_word,
+ int word_len,
+ char color,
+ const char ***keywords,
+ int maxlen)
+{
+ const char **kw;
+
+ if (word_len>maxlen) return 0;
+
+ kw = keywords[word_len - 1];
+ if (!kw) return 0;
+
+ while (*kw)
+ {
+ if (!memcmp (word, *kw, word_len))
+ {
+ memset (color_word, color, word_len);
+ return 1;
+ }
+
+ kw++;
+ }
+
+ return 0;
+}
+
+enum
+{
+ COL_NORMAL,
+ COL_LITERAL,
+ COL_TYPE,
+ COL_KEYWORD,
+ COL_PREPROC,
+ COL_COMMENT,
+};
+
+static void
+tui_syntax_highlight (enum language lang,
+ const char *src_line,
+ char *col_line)
+{
+ int preproc = 0;
+
+ if( lang != language_c && lang != language_cplus ) return;
+
+ while (src_line[0])
+ {
+ char c = src_line[0];
+
+ if (!preproc && c != ' ')
+ {
+ if (c == '#')
+ {
+ preproc = 2;
+ col_line[0] = COL_PREPROC;
+ }
+ else
+ preproc = 1;
+ }
+
+ if (c >= '0' && c <= '9')
+ {
+ col_line[0] = COL_LITERAL;
+
+ c = src_line[1];
+ while ((c >= '0' && c <= '9') || (c >= 'a' && c <= 'z') ||
+ (c >= 'A' && c <= 'Z') || c == '_')
+ {
+ src_line++;
+ col_line++;
+ c = src_line[1];
+
+ col_line[0] = COL_LITERAL;
+ }
+
+ preproc = 1;
+ }
+ else if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_')
+ {
+ const char *word_start = src_line;
+ char *col_start = col_line;
+ int word_len;
+
+ c = src_line[1];
+ while ((c >= '0' && c <= '9') || (c >= 'a' && c <= 'z') ||
+ (c >= 'A' && c <= 'Z') || c == '_')
+ {
+ src_line++;
+ col_line++;
+ c = src_line[1];
+ }
+
+ word_len = src_line - word_start + 1;
+
+ do
+ {
+ if (preproc==2 &&
+ tui_keyword_highlight (word_start, col_start, word_len, COL_PREPROC, syntax_preproc, 7))
+ break;
+
+ if (tui_keyword_highlight (word_start, col_start, word_len, COL_TYPE, syntax_type_c, 8))
+ break;
+ if (lang==language_cplus &&
+ tui_keyword_highlight (word_start, col_start, word_len, COL_TYPE, syntax_type_cpp, 9))
+ break;
+
+ if (tui_keyword_highlight (word_start, col_start, word_len, COL_KEYWORD, syntax_keyword_c, 8))
+ break;
+ if (lang==language_cplus &&
+ tui_keyword_highlight (word_start, col_start, word_len, COL_KEYWORD, syntax_keyword_cpp, 16))
+ break;
+
+ if (tui_keyword_highlight (word_start, col_start, word_len, COL_LITERAL, syntax_literal, 5))
+ break;
+ }
+ while (0);
+
+ preproc = 1;
+ }
+ else if (c == '"')
+ {
+ const char *string_start = src_line;
+ char *col_start = col_line;
+
+ while (src_line[1])
+ {
+ src_line++;
+ col_line++;
+ c = src_line[0];
+
+ if (c == '\\' && src_line[1])
+ {
+ src_line++;
+ col_line++;
+ continue;
+ }
+
+ if (c == '"')
+ break;
+ }
+
+ memset (col_start, COL_LITERAL, (src_line - string_start) + 1);
+
+ preproc = 1;
+ }
+ else if (c == '\'')
+ {
+ const char *char_start = src_line;
+ char *col_start = col_line;
+
+ if (char_start[1] == '\\' && char_start[2] )
+ src_line = strchr (char_start + 3, '\'');
+ else if (char_start[1])
+ src_line = strchr (char_start + 2, '\'');
+ else
+ src_line = NULL;
+ if (!src_line)
+ src_line = char_start + (strlen (char_start) - 1);
+
+ col_line += src_line - char_start;
+
+ memset (col_start, COL_LITERAL, (src_line - char_start) + 1);
+
+ preproc = 1;
+ }
+ else if (c == '/' && (src_line[1] == '/' || src_line[1] == '*'))
+ {
+ const char *comment_start = src_line;
+ char *col_start = col_line;
+
+ src_line = comment_start[1]=='*' ?
+ strstr (comment_start + 2, "*/") : NULL;
+ if (!src_line)
+ src_line = comment_start + (strlen (comment_start) - 1);
+ else
+ src_line++;
+
+ col_line += src_line - comment_start;
+
+ memset (col_start, COL_COMMENT, (src_line - comment_start) + 1);
+
+ preproc = 1;
+ }
+ else if (c != ' ' && c != '#')
+ {
+ preproc = 1;
+ }
+
+ src_line++;
+ col_line++;
+ }
+}
+#endif
+
+
/* Function to display source in the source window. */
enum tui_status
tui_set_source_content (struct symtab *s,
@@ -51,6 +512,9 @@
FILE *stream;
int i, desc, c, line_width, nlines;
char *src_line = 0;
+#ifdef TUI_SYNTAX_HIGHLIGHT
+ char *col_line = 0;
+#endif
if ((ret = tui_alloc_source_buffer (TUI_SRC_WIN)) == TUI_SUCCESS)
{
@@ -98,6 +562,9 @@
struct tui_source_info *src
= &TUI_SRC_WIN->detail.source_info;
const char *s_filename = symtab_to_filename_for_display (s);
+#ifdef TUI_SYNTAX_HIGHLIGHT
+ enum language lang;
+#endif
if (TUI_SRC_WIN->generic.title)
xfree (TUI_SRC_WIN->generic.title);
@@ -106,19 +573,35 @@
xfree (src->fullname);
src->fullname = xstrdup (symtab_to_fullname (s));
+#ifdef TUI_SYNTAX_HIGHLIGHT
+ lang = deduce_language_from_filename (src->fullname);
+ if (lang == language_unknown)
+ lang = get_frame_language ();
+ if (lang == language_unknown)
+ lang = language_cplus;
+#endif
+
/* Determine the threshold for the length of the
line and the offset to start the display. */
offset = src->horizontal_offset;
threshold = (line_width - 1) + offset;
+#ifdef TUI_SYNTAX_HIGHLIGHT
+ if (tui_can_syntax_highlight)
+ threshold += SYNTAX_HIGHLIGHT_EXTRA;
+#endif
stream = fdopen (desc, FOPEN_RT);
clearerr (stream);
cur_line = 0;
src->gdbarch = get_objfile_arch (s->objfile);
src->start_line_or_addr.loa = LOA_LINE;
cur_line_no = src->start_line_or_addr.u.line_no = line_no;
- if (offset > 0)
- src_line = (char *) xmalloc (
+ src_line = (char *) xmalloc (
+ (threshold + 1) * sizeof (char));
+#ifdef TUI_SYNTAX_HIGHLIGHT
+ if (tui_can_syntax_highlight)
+ col_line = (char *) xmalloc (
(threshold + 1) * sizeof (char));
+#endif
while (cur_line < nlines)
{
struct tui_win_element *element
@@ -128,10 +611,11 @@
/* Get the first character in the line. */
c = fgetc (stream);
- if (offset == 0)
- src_line = ((struct tui_win_element *)
- TUI_SRC_WIN->generic.content[
- cur_line])->which_element.source.line;
+#ifdef TUI_SYNTAX_HIGHLIGHT
+ if (tui_can_syntax_highlight)
+ memset( col_line,0,threshold+1 );
+#endif
+
/* Init the line with the line number. */
sprintf (src_line, "%-6d", cur_line_no);
cur_len = strlen (src_line);
@@ -222,9 +706,27 @@
/* Now copy the line taking the offset into
account. */
if (strlen (src_line) > offset)
- strcpy (((struct tui_win_element *)
- TUI_SRC_WIN->generic.content[cur_line])->which_element.source.line,
- &src_line[offset]);
+ {
+#ifdef TUI_SYNTAX_HIGHLIGHT
+ if (tui_can_syntax_highlight)
+ {
+ tui_syntax_highlight (lang,
+ src_line + cur_len,
+ col_line + cur_len);
+
+ src_line[threshold-SYNTAX_HIGHLIGHT_EXTRA] = 0;
+
+ memcpy (((struct tui_win_element *)
+ TUI_SRC_WIN->generic.content[cur_line])->which_element.source.line +
+ line_width,
+ &col_line[offset], strlen(&src_line[offset]));
+ }
+#endif
+
+ strcpy (((struct tui_win_element *)
+ TUI_SRC_WIN->generic.content[cur_line])->which_element.source.line,
+ &src_line[offset]);
+ }
else
((struct tui_win_element *)
TUI_SRC_WIN->generic.content[
@@ -232,8 +734,10 @@
cur_line++;
cur_line_no++;
}
- if (offset > 0)
- xfree (src_line);
+ xfree (src_line);
+#ifdef TUI_SYNTAX_HIGHLIGHT
+ xfree (col_line);
+#endif
fclose (stream);
TUI_SRC_WIN->generic.content_size = nlines;
ret = TUI_SUCCESS;
--- gdb/tui/tui-winsource.c 2013-02-03 17:16:42 +0100
+++ gdb/tui/tui-winsource.c 2013-05-10 13:23:29 +0200
@@ -272,19 +272,72 @@
}
+#ifdef TUI_SYNTAX_HIGHLIGHT
+extern int tui_can_syntax_highlight;
+extern int tui_color_tab[5];
+#endif
+
/* Redraw the complete line of a source or disassembly window. */
static void
tui_show_source_line (struct tui_win_info *win_info, int lineno)
{
struct tui_win_element *line;
int x, y;
+ char *src_line;
+#ifdef TUI_SYNTAX_HIGHLIGHT
+ char *col_line;
+#endif
line = (struct tui_win_element *) win_info->generic.content[lineno - 1];
+ src_line = line->which_element.source.line;
+#ifdef TUI_SYNTAX_HIGHLIGHT
+ col_line = (char *)NULL;
+#endif
+
if (line->which_element.source.is_exec_point)
wattron (win_info->generic.handle, A_STANDOUT);
+#ifdef TUI_SYNTAX_HIGHLIGHT
+ else if (win_info == TUI_SRC_WIN && tui_can_syntax_highlight)
+ col_line = src_line + (win_info->generic.width - 1);
+
+ if (col_line)
+ {
+ int len = strlen (src_line);
+ char cur_col = 0;
+
+ wmove (win_info->generic.handle, lineno, 1);
+
+ while (len)
+ {
+ int output_count = 0;
+
+ while (output_count < len && col_line[output_count] == cur_col)
+ output_count++;
+
+ if (output_count)
+ {
+ waddnstr (win_info->generic.handle, src_line, output_count);
+
+ src_line += output_count;
+ col_line += output_count;
+ len -= output_count;
+ }
+
+ if (cur_col)
+ wattroff (win_info->generic.handle, tui_color_tab[cur_col - 1]);
+
+ cur_col = len ? col_line[0] : 0;
+
+ if (cur_col)
+ wattron (win_info->generic.handle, tui_color_tab[cur_col - 1]);
+ }
+ }
+ else
+#endif
+ {
+ mvwaddstr (win_info->generic.handle, lineno, 1, src_line);
+ }
- mvwaddstr (win_info->generic.handle, lineno, 1,
- line->which_element.source.line);
if (line->which_element.source.is_exec_point)
wattroff (win_info->generic.handle, A_STANDOUT);
@@ -614,6 +667,10 @@
max_lines = win_info->generic.height; /* Less the highlight box. */
line_width = win_info->generic.width - 1;
+#ifdef TUI_SYNTAX_HIGHLIGHT
+ if (win_info == TUI_SRC_WIN)
+ line_width *= 2;
+#endif
/*
* Allocate the buffer for the source lines. Do this only once
* since they will be re-used for all source displays. The only
--- gdb/Makefile.in 2013-04-02 19:38:43 +0200
+++ gdb/Makefile.in 2013-05-10 16:47:12 +0200
@@ -264,7 +264,7 @@
SUBDIR_TUI_DEPS =
SUBDIR_TUI_LDFLAGS=
SUBDIR_TUI_CFLAGS= \
- -DTUI=1
+ -DTUI=1 -DTUI_SYNTAX_HIGHLIGHT
#
# python sub directory definitons
