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/*
* termcolors.c
*
* Copyright (c) 2020-2021 Nikias Bassen, All Rights Reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef WIN32
#include <windows.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <stdarg.h>
#include "common.h"
#include "libimobiledevice-glue/termcolors.h"
static int use_colors = 0;
#ifdef WIN32
static int WIN32_LEGACY_MODE = 1;
static WORD COLOR_RESET_ATTR = 0;
static WORD DEFAULT_FG_ATTR = 0;
static WORD DEFAULT_BG_ATTR = 0;
static HANDLE h_stdout = INVALID_HANDLE_VALUE;
static HANDLE h_stderr = INVALID_HANDLE_VALUE;
#ifndef ENABLE_VIRTUAL_TERMINAL_PROCESSING
#define ENABLE_VIRTUAL_TERMINAL_PROCESSING 0x0004
#endif
#define STYLE_DIM (1 << 16)
#define FG_COLOR_MASK (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE)
#define BG_COLOR_MASK (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE)
#define FG_COLOR_ATTR_MASK (FG_COLOR_MASK | FOREGROUND_INTENSITY)
#define BG_COLOR_ATTR_MASK (BG_COLOR_MASK | BACKGROUND_INTENSITY)
static int style_map[9] = {
/* RESET ALL */ 0,
/* BRIGHT */ FOREGROUND_INTENSITY,
/* DIM */ STYLE_DIM,
/* (n/a) */ 0,
/* UNDERLINED */ 0, // COMMON_LVB_UNDERSCORE ?
/* BLINK */ 0, // NOT SUPPORTED
/* (n/a) */ 0,
/* REVERSE CLR */ 0, // COMMON_LVB_REVERSE_VIDEO ?
/* HIDDEN */ 0 // NOT SUPPORTED
};
static int fgcolor_map[8] = {
/* BLACK */ 0,
/* RED */ FOREGROUND_RED,
/* GREEN */ FOREGROUND_GREEN,
/* YELLOW */ FOREGROUND_GREEN | FOREGROUND_RED,
/* BLUE */ FOREGROUND_BLUE,
/* MAGENTA */ FOREGROUND_BLUE | FOREGROUND_RED,
/* CYAN */ FOREGROUND_BLUE | FOREGROUND_GREEN,
/* WHITE */ FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE
};
static int bgcolor_map[8] = {
/* BLACK */ 0,
/* RED */ BACKGROUND_RED,
/* GREEN */ BACKGROUND_GREEN,
/* YELLOW */ BACKGROUND_GREEN | BACKGROUND_RED,
/* BLUE */ BACKGROUND_BLUE,
/* MAGENTA */ BACKGROUND_BLUE | BACKGROUND_RED,
/* CYAN */ BACKGROUND_BLUE | BACKGROUND_GREEN,
/* WHITE */ BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE
};
#else
static int WIN32_LEGACY_MODE = 0;
#endif
LIBIMOBILEDEVICE_GLUE_API void term_colors_init()
{
#ifdef WIN32
DWORD conmode = 0;
h_stdout = GetStdHandle(STD_OUTPUT_HANDLE);
GetConsoleMode(h_stdout, &conmode);
if (conmode & ENABLE_VIRTUAL_TERMINAL_PROCESSING) {
WIN32_LEGACY_MODE = 0;
} else {
conmode |= ENABLE_VIRTUAL_TERMINAL_PROCESSING;
if (SetConsoleMode(h_stdout, conmode)) {
WIN32_LEGACY_MODE = 0;
} else {
WIN32_LEGACY_MODE = 1;
}
}
if (WIN32_LEGACY_MODE) {
CONSOLE_SCREEN_BUFFER_INFO csbi;
if (GetConsoleScreenBufferInfo(h_stdout, &csbi)) {
COLOR_RESET_ATTR = csbi.wAttributes;
DEFAULT_FG_ATTR = csbi.wAttributes & FG_COLOR_ATTR_MASK;
DEFAULT_BG_ATTR = csbi.wAttributes & BG_COLOR_ATTR_MASK;
}
h_stderr = GetStdHandle(STD_ERROR_HANDLE);
}
#endif
use_colors = isatty(1);
const char* color_env = getenv("COLOR");
if (color_env) {
long val = strtol(color_env, NULL, 10);
use_colors = (val != 0);
}
}
LIBIMOBILEDEVICE_GLUE_API void term_colors_set_enabled(int en)
{
use_colors = en;
}
LIBIMOBILEDEVICE_GLUE_API int cvfprintf(FILE* stream, const char* fmt, va_list vargs)
{
int res = 0;
int colorize = use_colors;
#ifdef WIN32
struct esc_item {
int pos;
WORD attr;
};
HANDLE h_stream = h_stdout;
if (WIN32_LEGACY_MODE) {
if (stream == stdout) {
h_stream = h_stdout;
} else if (stream == stderr) {
h_stream = h_stderr;
} else {
colorize = 0;
}
}
#endif
if (!colorize || WIN32_LEGACY_MODE) {
// first, we need to print the string WITH escape sequences
va_list vargs_copy;
va_copy(vargs_copy, vargs);
int len = vsnprintf(NULL, 0, fmt, vargs);
char* newbuf = (char*)malloc(len+1);
res = vsnprintf(newbuf, len+1, fmt, vargs_copy);
va_end(vargs_copy);
// then, we need to remove the escape sequences, if any
#ifdef WIN32
// if colorize is on, we need to keep their positions for later
struct esc_item* esc_items = NULL;
int attr = 0;
if (colorize) {
esc_items = (struct esc_item*)malloc(sizeof(struct esc_item) * ((len/3)+1));
CONSOLE_SCREEN_BUFFER_INFO csbi;
if (GetConsoleScreenBufferInfo(h_stream, &csbi)) {
attr = csbi.wAttributes;
}
}
#endif
int num_esc = 0;
char* start = &newbuf[0];
char* p = start;
char* end = start + len + 1;
while (p < end-1) {
char* cur = p;
if (*p == '\e' && end-p > 2 && *(p+1) == '[') {
p+=2;
if (*p == 'm') {
#ifdef WIN32
attr = COLOR_RESET_ATTR;
#endif
int move_by = (p+1)-cur;
int move_amount = end-(p+1);
memmove(cur, p+1, move_amount);
end -= move_by;
p = cur;
} else {
char* endp = NULL;
do {
long lval = strtol(p, &endp, 10);
if (!endp || (*endp != ';' && *endp != 'm')) {
fprintf(stderr, "\n*** %s: Invalid escape sequence in format string, expected ';' or 'm' ***\n", __func__);
#ifdef WIN32
free(esc_items);
#endif
free(newbuf);
return -1;
}
#ifdef WIN32
if (colorize) {
if (lval >= 0 && lval <= 8) {
/* style attributes */
attr &= ~FOREGROUND_INTENSITY;
attr |= style_map[lval];
} else if (lval >= 30 && lval <= 37) {
/* foreground color */
attr &= ~FG_COLOR_MASK;
attr |= fgcolor_map[lval-30];
} else if (lval == 39) {
/* default foreground color */
attr &= ~FG_COLOR_ATTR_MASK;
attr |= DEFAULT_FG_ATTR;
} else if (lval >= 40 && lval <= 47) {
/* background color */
attr &= ~BG_COLOR_MASK;
attr |= bgcolor_map[lval-40];
} else if (lval == 49) {
/* default background color */
attr &= ~BG_COLOR_ATTR_MASK;
attr |= DEFAULT_BG_ATTR;
} else if (lval >= 90 && lval <= 97) {
/* foreground color bright */
attr &= ~FG_COLOR_ATTR_MASK;
attr |= fgcolor_map[lval-90];
attr |= FOREGROUND_INTENSITY;
} else if (lval >= 100 && lval <= 107) {
/* background color bright */
attr &= ~BG_COLOR_MASK;
attr |= bgcolor_map[lval-100];
attr |= BACKGROUND_INTENSITY;
}
}
#else
(void)lval; // suppress compiler warning about unused variable
#endif
p = endp+1;
} while (p < end && *endp == ';');
int move_by = (endp+1)-cur;
int move_amount = end-(endp+1);
memmove(cur, endp+1, move_amount);
end -= move_by;
p = cur;
}
#ifdef WIN32
if (colorize) {
esc_items[num_esc].pos = p-start;
if (attr & STYLE_DIM) {
attr &= ~STYLE_DIM;
attr &= ~FOREGROUND_INTENSITY;
}
esc_items[num_esc].attr = (WORD)attr;
num_esc++;
}
#endif
} else {
p++;
}
}
if (num_esc == 0) {
res = fputs(newbuf, stream);
free(newbuf);
#ifdef WIN32
free(esc_items);
#endif
return res;
}
#ifdef WIN32
else {
p = &newbuf[0];
char* lastp = &newbuf[0];
int i;
for (i = 0; i < num_esc; i++) {
p = &newbuf[esc_items[i].pos];
if (lastp < p) {
fprintf(stream, "%.*s", (int)(p-lastp), lastp);
lastp = p;
}
SetConsoleTextAttribute(h_stream, esc_items[i].attr);
}
if (lastp < end) {
fprintf(stream, "%.*s", (int)(end-lastp), lastp);
}
return res;
}
#endif
} else {
res = vfprintf(stream, fmt, vargs);
}
return res;
}
LIBIMOBILEDEVICE_GLUE_API int cfprintf(FILE* stream, const char* fmt, ...)
{
int res = 0;
va_list va;
va_start(va, fmt);
res = cvfprintf(stream, fmt, va);
va_end(va);
return res;
}
LIBIMOBILEDEVICE_GLUE_API int cprintf(const char* fmt, ...)
{
int res = 0;
va_list va;
va_start(va, fmt);
res = cvfprintf(stdout, fmt, va);
va_end(va);
return res;
}
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