folders

libs/main/text/piconstchars.cpp

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+/*
+	PIP - Platform Independent Primitives
+	C-String class
+	Ivan Pelipenko peri4ko@yandex.ru
+
+	This program 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 3 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 Lesser General Public License for more details.
+
+	You should have received a copy of the GNU Lesser General Public License
+	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include "piconstchars.h"
+#include "pistring.h"
+
+
+//! \~\class PIConstChars piconstchars.h
+//! \~\details
+//! \~english \section PIConstChars_sec0 Synopsis
+//! \~russian \section PIConstChars_sec0 Краткий обзор
+//! \~english
+//! This is wrapper around \c const char * string. %PIConstChars doesn`t
+//! copy string, just save pointer and size.
+//!
+//! Provides API similar to string, with information and compare methods.
+//!
+//! Used to more handly works with ordinary C-strings.
+//!
+//! \~russian
+//! Это обертка вокруг \c const char * строки. %PIConstChars не скопирует
+//! строку, а хранит только указатель и размер.
+//!
+//! Предоставляет API схожий с обычной строкой, с методами сравнения и информационными.
+//!
+//! Используется для более удобной работы с обычными C-строками.
+//!
+
+
+bool PIConstChars::contains(char c) const {
+	for (int i = 0; i < (int)len; ++i)
+		if (str[i] == c) return true;
+	return false;
+}
+
+
+bool PIConstChars::startsWith(const PIConstChars & str) const {
+	if (size() < str.size()) return false;
+	return str == left(str.size());
+}
+
+
+bool PIConstChars::startsWith(const char c) const {
+	if (size() < 1) return false;
+	return str[0] == c;
+}
+
+
+bool PIConstChars::endsWith(const PIConstChars & str) const {
+	if (size() < str.size()) return false;
+	return str == right(str.size());
+}
+
+
+bool PIConstChars::endsWith(const char c) const {
+	if (size() < 1) return false;
+	return str[len - 1] == c;
+}
+
+
+PIConstChars PIConstChars::mid(const int start, const int len) const {
+	int s = start, l = len;
+	if (l == 0 || s >= (int)size() || isEmpty()) return PIConstChars("");
+	if (s < 0) {
+		l += s;
+		s = 0;
+	}
+	if (l < 0) {
+		return PIConstChars(str + s, (int)size() - s);
+	} else {
+		if (l > (int)size() - s)
+			l = (int)size() - s;
+		return PIConstChars(str + s, l);
+	}
+	return PIConstChars("");
+}
+
+
+PIConstChars PIConstChars::left(const int l) const {
+	if (l <= 0) return PIConstChars("");
+	return mid(0, l);
+}
+
+
+PIConstChars PIConstChars::right(const int l) const {
+	if (l <= 0) return PIConstChars("");
+	return mid((int)size() - l, l);
+}
+
+
+PIConstChars & PIConstChars::cutLeft(const int l) {
+	if (l <= 0) return *this;
+	if (l >= (int)size())
+		*this = PIConstChars("");
+	else {
+		str += l;
+		len -= l;
+	}
+	return *this;
+}
+
+
+PIConstChars & PIConstChars::cutRight(const int l) {
+	if (l <= 0) return *this;
+	if (l >= (int)size())
+		*this = PIConstChars("");
+	else {
+		len -= l;
+	}
+	return *this;
+}
+
+
+PIConstChars PIConstChars::takeLeft(const int len) {
+	PIConstChars ret(left(len));
+	cutLeft(len);
+	return ret;
+}
+
+
+PIConstChars PIConstChars::takeRight(const int len) {
+	PIConstChars ret(right(len));
+	cutRight(len);
+	return ret;
+}
+
+
+PIConstChars & PIConstChars::trim() {
+	if (isEmpty()) return *this;
+	int st = -1, fn = 0;
+	for (int i = 0; i < (int)len; ++i) {
+		if (at(i) != ' ' && at(i) != '\t' && at(i) != '\n' && at(i) != '\r' && at(i) != char(12) && at(i) != uchar(0)) {
+			st = i;
+			break;
+		}
+	}
+	if (st < 0) {
+		*this = PIConstChars("");
+		return *this;
+	}
+	for (int i = (int)len - 1; i >= 0; --i) {
+		if (at(i) != ' ' && at(i) != '\t' && at(i) != '\n' && at(i) != '\r' && at(i) != char(12) && at(i) != uchar(0)) {
+			fn = i;
+			break;
+		}
+	}
+	if (fn < (int)len - 1) cutRight((int)len - fn - 1);
+	if (st > 0) cutLeft(st);
+	return *this;
+}
+
+
+PIString PIConstChars::toString() const {
+	if (isEmpty()) return PIString();
+	return PIString::fromAscii(str, len);
+}