From 825b5343a74848bc9b0d85723b6e28695090ce1d Mon Sep 17 00:00:00 2001
From: Einhard Leichtfuß <alguien@respiranto.de>
Date: Sun, 22 Oct 2017 00:16:28 +0200
Subject: Initial commit

---
 parse.c | 196 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 196 insertions(+)
 create mode 100644 parse.c

(limited to 'parse.c')

diff --git a/parse.c b/parse.c
new file mode 100644
index 0000000..3134397
--- /dev/null
+++ b/parse.c
@@ -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;
+}
-- 
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