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Diffstat (limited to 'parse.c')
| -rw-r--r-- | parse.c | 196 |
1 files changed, 196 insertions, 0 deletions
@@ -0,0 +1,196 @@ +/* + * parse.c - a small program to format the search results + * (and in the future also the info results). + * + * Copyright 2017, Einhard Leichtfuß + * + * This file is part of auria. + * + * auria is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published + * by the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * auria 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 Affero General Public License + * along with auria. If not, see <http://www.gnu.org/licenses/>. + */ + +/* Call as `parse <left-offset> <right-offset> [color]'. */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <sys/ioctl.h> + +#define COLOR_NOCOLOR "\e[0m" +#define COLOR_BVIOLET "\e[1;35m" +#define COLOR_BWHITE "\e[1;38m" +#define COLOR_BGREEN "\e[1;32m" + +#define cond_set_color(c) (color ? printf("%s", (c)) : 0) + +#define print_line_offset(offset) printf("%*c", (offset), ' ') + +#define print_word_offset(line_offset) \ + (first ? print_line_offset(line_offset) : putchar(' ')) + +_Bool color; /* colorized output */ +int k; /* left line offset */ +int j; /* right line offset */ +_Bool break_lines; /* set iff stdout is a tty */ +unsigned short width; /* terminal width, not relevant if ! break_lines */ +unsigned short n; /* actual broken line maximum length; excl. offsets */ + +int main(int argc, char **argv) +{ + if (argc < 3) + return 1; + + k = atoi(argv[1]); + j = atoi(argv[2]); + + if (k < 0 || j < 0) + return 1; + + color = 0; + if (argc >= 4 && strcmp(argv[3], "color") == 0) + { + color = 1; + } + + if (isatty(STDOUT_FILENO)) + { + break_lines = 1; + + struct winsize w; + if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &w) == -1) + return 1; + + width = w.ws_col; + n = width - k - j; + } + else + { + break_lines = 0; + } + + + /* + * Parse input line for line. + */ + int c; + + while (1) + { + c = getchar(); + if (c == EOF || c == '\n') + return 1; + + /* Read and print package name - delimited by space. */ + cond_set_color(COLOR_NOCOLOR COLOR_BVIOLET); + fputs("aur/", stdout); + cond_set_color(COLOR_NOCOLOR COLOR_BWHITE); + while (1) + { + if (c == ' ') + break; + if (c == EOF || c == '\n') + return 1; + putchar(c); + c = getchar(); + } + cond_set_color(COLOR_NOCOLOR); + putchar(' '); + + + /* Read and print version string - delimited by space. */ + cond_set_color(COLOR_BGREEN); + while (1) + { + c = getchar(); + if (c == ' ') + break; + if (c == EOF || c == '\n') + return 1; + putchar(c); + } + cond_set_color(COLOR_NOCOLOR); + putchar('\n'); + + + /* Read description - delimited by newline - and print it broken into + * lines of max. n chars with an offset of k chars, iff break_lines + * is set to 1 */ + int i = 0; + int wi = 0; + char word[n]; + _Bool first = 1; + + c = getchar(); + while (1) + { + if (c == '\t' || c == '\v') + c = ' '; + + if (c == '\n' || c == EOF) + { + if (wi != 0) + { + print_word_offset(k); + printf("%.*s\n", wi, word); + } + else if (! first) + putchar('\n'); + + if (c == '\n') + break; + else /* c == EOF */ + return 0; + } + else if (c == ' ') + { + if (wi != 0) + { + i++; + print_word_offset(k); + printf("%.*s", wi, word); + first = 0; + wi = 0; + } + c = getchar(); + } + else if (break_lines && i >= n) + { + if (first) + { + print_line_offset(k); + printf("%.*s\n", wi, word); + wi = 0; + i = 0; + } + else + { + putchar('\n'); + first = 1; + i = wi; + } + } + else + { + word[wi] = c; + wi++; + i++; + c = getchar(); + } + } + } + + /* Should never be reached. */ + return 0; +} |