1 files changed, 195 insertions, 0 deletions
diff --git a/lib/dpkg/string.c b/lib/dpkg/string.c
new file mode 100644
index 0000000..0428f0f
--- /dev/null
+++ b/lib/dpkg/string.c
@@ -0,0 +1,195 @@
+/*
+ * libdpkg - Debian packaging suite library routines
+ * string.c - string handling routines
+ *
+ * Copyright © 1995 Ian Jackson <ijackson@chiark.greenend.org.uk>
+ * Copyright © 2008-2015 Guillem Jover <guillem@debian.org>
+ *
+ * This 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 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, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <compat.h>
+
+#include <string.h>
+
+#include <dpkg/c-ctype.h>
+#include <dpkg/string.h>
+#include <dpkg/dpkg.h>
+
+char *
+str_concat(char *dst, ...)
+{
+	va_list args;
+	const char *src;
+	size_t len;
+
+	va_start(args, dst);
+	while ((src = va_arg(args, const char *))) {
+		len = strlen(src);
+		memcpy(dst, src, len);
+		dst += len;
+	}
+	va_end(args);
+	*dst = '\0';
+
+	return dst;
+}
+
+/**
+ * Match the end of a string.
+ *
+ * @param str The string.
+ * @param end The end to match in str.
+ *
+ * @return Whether the string was matched at the end.
+ */
+bool
+str_match_end(const char *str, const char *end)
+{
+	size_t str_len = strlen(str);
+	size_t end_len = strlen(end);
+	const char *str_end = str + str_len - end_len;
+
+	if (str_len >= end_len && strcmp(str_end, end) == 0)
+		return true;
+	else
+		return false;
+}
+
+/**
+ * Print formatted output to an allocated string.
+ *
+ * @param fmt The format string.
+ * @param ... The format arguments.
+ *
+ * @return The new allocated formatted output string (never NULL).
+ */
+char *
+str_fmt(const char *fmt, ...)
+{
+	va_list args;
+	char *str;
+
+	va_start(args, fmt);
+	m_vasprintf(&str, fmt, args);
+	va_end(args);
+
+	return str;
+}
+
+/**
+ * Escape format characters from a string.
+ *
+ * @param dst The destination string.
+ * @param src The source string.
+ * @param n The size of the destination buffer.
+ *
+ * @return The end of the destination string.
+ */
+char *
+str_escape_fmt(char *dst, const char *src, size_t n)
+{
+	char *d = dst;
+	const char *s = src;
+
+	if (n == 0)
+		return d;
+
+	while (*s) {
+		if (*s == '%') {
+			if (n-- <= 2)
+				break;
+			*d++ = '%';
+		}
+		if (n-- <= 1)
+			break;
+		*d++ = *s++;
+	}
+
+	*d = '\0';
+
+	return d;
+}
+
+/**
+ * Quote shell metacharacters in a string.
+ *
+ * This function allows passing strings to commands without splitting the
+ * arguments, like in system(3)
+ *
+ * @param src The source string to escape.
+ *
+ * @return The new allocated string (never NULL).
+ */
+char *
+str_quote_meta(const char *src)
+{
+	char *new_dst, *dst;
+
+	new_dst = dst = m_malloc(strlen(src) * 2);
+
+	while (*src) {
+		if (!c_isdigit(*src) && !c_isalpha(*src))
+			*dst++ = '\\';
+
+		*dst++ = *src++;
+	}
+
+	*dst = '\0';
+
+	return new_dst;
+}
+
+/**
+ * Check and strip possible surrounding quotes in string.
+ *
+ * @param str The string to act on.
+ *
+ * @return A pointer to str or NULL if the quotes were unbalanced.
+ */
+char *
+str_strip_quotes(char *str)
+{
+	if (str[0] == '"' || str[0] == '\'') {
+		size_t str_len = strlen(str);
+
+		if (str[0] != str[str_len - 1])
+			return NULL;
+
+		/* Remove surrounding quotes. */
+		str[str_len - 1] = '\0';
+		str++;
+	}
+
+	return str;
+}
+
+/**
+ * Trim possible ending spaces in string.
+ *
+ * @param str The string to act on.
+ * @param str_end The end of the string to act on.
+ *
+ * @return A pointer to the end of the trimmed string.
+ */
+char *
+str_rtrim_spaces(const char *str, char *str_end)
+{
+	while (str_end > str && c_isspace(str_end[-1]))
+		str_end--;
+	if (str_end >= str)
+		*str_end = '\0';
+	return str_end;
+}