/output.cc
C++ | 184 lines | 133 code | 32 blank | 19 comment | 48 complexity | 054cfeb81d6c158f02feb6f83dc32d71 MD5 | raw file
Possible License(s): GPL-2.0
- /***************************************************************************
- * Copyright (C) 2015 by Hans-Peter Deifel *
- * hpdeifel@gmx.de *
- * *
- * This program is free software; you can redistribute it and/or modify *
- * it under the terms of the GNU General Public License as published by *
- * the Free Software Foundation; either version 2 of the License, or *
- * (at your option) any later version. *
- * *
- * This program 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 General Public License for more details. *
- * *
- * You should have received a copy of the GNU General Public License *
- * along with this program; if not, write to the *
- * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, *
- * Boston, MA 02110-1301 USA. *
- ***************************************************************************/
- #include "output.h"
- #include <stdio.h>
- #include <string.h>
- #include <ctype.h>
- bool is_valid_color(const char* colorcode) {
- return colorcode && strcmp(colorcode, "");
- }
- void start_color(bool use_colors, const char *colorcode)
- {
- if (use_colors && is_valid_color(colorcode))
- printf("\33[%sm\33[K", colorcode);
- }
- void end_color(bool use_colors, const char *colorcode)
- {
- if (use_colors && is_valid_color(colorcode))
- printf("\33[m\33[K");
- }
- #define with_color(use_colors, color, code) \
- do { \
- start_color(use_colors, color); \
- { \
- code; \
- } \
- end_color(use_colors, color); \
- } while (0);
- void print_line_prefix(const struct outconf *conf, const char *filename, const int pagenum)
- {
- if (filename && conf->filename) {
- with_color(conf->color, conf->colors.filename,
- printf("%s", filename););
- with_color(conf->color, conf->colors.separator, printf(":"););
- }
- if (pagenum >= 0 && conf->pagenum) {
- with_color(conf->color, conf->colors.pagenum,
- printf("%d", pagenum););
- with_color(conf->color, conf->colors.separator, printf(":"););
- }
- }
- void putsn(char *string, int from, int to)
- {
- for (; from < to; from++) {
- char c = string[from];
- if (isprint(c))
- putchar(c);
- }
- }
- int next_word_left(char *string, int index)
- {
- int i = 0;
- int in_whitespace;
- if (index < 0 || string[index] == '\n')
- return -1;
- in_whitespace = isspace(string[index]);
- while (index >= 0 && string[index] != '\n') {
- if (in_whitespace) {
- if (!isspace(string[index]))
- in_whitespace = 0;
- } else {
- if (isspace(string[index]))
- break;
- }
- i++;
- index--;
- }
- return i;
- }
- int next_word_right(char *string, int index, int buflen)
- {
- int i = 0;
- int in_whitespace;
- if (index >= buflen || string[index] == '\n')
- return -1;
- in_whitespace = isspace(string[index]);
- while (index < buflen && string[index] != '\n') {
- if (in_whitespace) {
- if (!isspace(string[index]))
- in_whitespace = 0;
- } else {
- if (isspace(string[index]))
- break;
- }
- i++;
- index++;
- }
- return i;
- }
- void print_context_chars(const struct context *context, const struct match *match)
- {
- int a = match->start;
- int b = match->end;
- int chars_left = context->before;
- int left = next_word_left(match->string, a-1);
- int right = next_word_right(match->string, b, match->strlen);
- while (true) {
- if ((left < 0 || left > chars_left)
- && (right < 0 || right > chars_left))
- break;
- if (right < 0 || right > chars_left ||
- (left > 0 && left <= chars_left
- && (match->start - a) + left
- < (b - match->end) + right)) {
- a -= left;
- chars_left -= left;
- left = next_word_left(match->string,a-1);
- } else {
- b += right;
- chars_left -= right;
- right = next_word_right(match->string, b, match->strlen);
- }
- }
- print_line_prefix(context->out, context->filename, context->pagenum);
- putsn(match->string, a, match->start);
- with_color(context->out->color, context->out->colors.highlight,
- putsn(match->string, match->start, match->end);
- );
- putsn(match->string, match->end, b);
- }
- void print_context_line(const struct context *context, const struct match *match)
- {
- int a = match->start;
- int b = match->end;
- while (a >= 0 && match->string[a] != '\n')
- a--;
- a++;
- while (b < match->strlen && match->string[b] != '\n')
- b++;
- print_line_prefix(context->out, context->filename, context->pagenum);
- putsn(match->string, a, match->start);
- with_color(context->out->color, context->out->colors.highlight,
- putsn(match->string, match->start, match->end);
- );
- putsn(match->string, match->end, b);
- }