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comparison gcc/diagnostic-color.c @ 131:84e7813d76e9

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gcc-8.2
author mir3636
date Thu, 25 Oct 2018 07:37:49 +0900
parents 04ced10e8804
children 1830386684a0
comparison
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111:04ced10e8804 131:84e7813d76e9
1 /* Output colorization. 1 /* Output colorization.
2 Copyright (C) 2011-2017 Free Software Foundation, Inc. 2 Copyright (C) 2011-2018 Free Software Foundation, Inc.
3 3
4 This program is free software; you can redistribute it and/or modify 4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by 5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3, or (at your option) 6 the Free Software Foundation; either version 3, or (at your option)
7 any later version. 7 any later version.
22 22
23 #ifdef __MINGW32__ 23 #ifdef __MINGW32__
24 # include <windows.h> 24 # include <windows.h>
25 #endif 25 #endif
26 26
27 /* Select Graphic Rendition (SGR, "\33[...m") strings. */ 27 #include "color-macros.h"
28 /* Also Erase in Line (EL) to Right ("\33[K") by default. */
29 /* Why have EL to Right after SGR?
30 -- The behavior of line-wrapping when at the bottom of the
31 terminal screen and at the end of the current line is often
32 such that a new line is introduced, entirely cleared with
33 the current background color which may be different from the
34 default one (see the boolean back_color_erase terminfo(5)
35 capability), thus scrolling the display by one line.
36 The end of this new line will stay in this background color
37 even after reverting to the default background color with
38 "\33[m', unless it is explicitly cleared again with "\33[K"
39 (which is the behavior the user would instinctively expect
40 from the whole thing). There may be some unavoidable
41 background-color flicker at the end of this new line because
42 of this (when timing with the monitor's redraw is just right).
43 -- The behavior of HT (tab, "\t") is usually the same as that of
44 Cursor Forward Tabulation (CHT) with a default parameter
45 of 1 ("\33[I"), i.e., it performs pure movement to the next
46 tab stop, without any clearing of either content or screen
47 attributes (including background color); try
48 printf 'asdfqwerzxcv\rASDF\tZXCV\n'
49 in a bash(1) shell to demonstrate this. This is not what the
50 user would instinctively expect of HT (but is ok for CHT).
51 The instinctive behavior would include clearing the terminal
52 cells that are skipped over by HT with blank cells in the
53 current screen attributes, including background color;
54 the boolean dest_tabs_magic_smso terminfo(5) capability
55 indicates this saner behavior for HT, but only some rare
56 terminals have it (although it also indicates a special
57 glitch with standout mode in the Teleray terminal for which
58 it was initially introduced). The remedy is to add "\33K"
59 after each SGR sequence, be it START (to fix the behavior
60 of any HT after that before another SGR) or END (to fix the
61 behavior of an HT in default background color that would
62 follow a line-wrapping at the bottom of the screen in another
63 background color, and to complement doing it after START).
64 Piping GCC's output through a pager such as less(1) avoids
65 any HT problems since the pager performs tab expansion.
66
67 Generic disadvantages of this remedy are:
68 -- Some very rare terminals might support SGR but not EL (nobody
69 will use "gcc -fdiagnostics-color" on a terminal that does not
70 support SGR in the first place).
71 -- Having these extra control sequences might somewhat complicate
72 the task of any program trying to parse "gcc -fdiagnostics-color"
73 output in order to extract structuring information from it.
74 A specific disadvantage to doing it after SGR START is:
75 -- Even more possible background color flicker (when timing
76 with the monitor's redraw is just right), even when not at the
77 bottom of the screen.
78 There are no additional disadvantages specific to doing it after
79 SGR END.
80
81 It would be impractical for GCC to become a full-fledged
82 terminal program linked against ncurses or the like, so it will
83 not detect terminfo(5) capabilities. */
84 #define COLOR_SEPARATOR ";"
85 #define COLOR_NONE "00"
86 #define COLOR_BOLD "01"
87 #define COLOR_UNDERSCORE "04"
88 #define COLOR_BLINK "05"
89 #define COLOR_REVERSE "07"
90 #define COLOR_FG_BLACK "30"
91 #define COLOR_FG_RED "31"
92 #define COLOR_FG_GREEN "32"
93 #define COLOR_FG_YELLOW "33"
94 #define COLOR_FG_BLUE "34"
95 #define COLOR_FG_MAGENTA "35"
96 #define COLOR_FG_CYAN "36"
97 #define COLOR_FG_WHITE "37"
98 #define COLOR_BG_BLACK "40"
99 #define COLOR_BG_RED "41"
100 #define COLOR_BG_GREEN "42"
101 #define COLOR_BG_YELLOW "43"
102 #define COLOR_BG_BLUE "44"
103 #define COLOR_BG_MAGENTA "45"
104 #define COLOR_BG_CYAN "46"
105 #define COLOR_BG_WHITE "47"
106 #define SGR_START "\33["
107 #define SGR_END "m\33[K"
108 #define SGR_SEQ(str) SGR_START str SGR_END
109 #define SGR_RESET SGR_SEQ("")
110
111 28
112 /* The context and logic for choosing default --color screen attributes 29 /* The context and logic for choosing default --color screen attributes
113 (foreground and background colors, etc.) are the following. 30 (foreground and background colors, etc.) are the following.
114 -- There are eight basic colors available, each with its own 31 -- There are eight basic colors available, each with its own
115 nominal luminosity to the human eye and foreground/background 32 nominal luminosity to the human eye and foreground/background