From c9bfccc35345ce58fb5774d4b0b6a9868b262c0a Mon Sep 17 00:00:00 2001 From: giorgio Date: Wed, 5 Sep 2012 08:31:30 +0000 Subject: git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1381061 13f79535-47bb-0310-9956-ffa450edef68 --- sca-cpp/branches/lightweight-sca/kernel/string.hpp | 305 +++++++++++++++++++++ 1 file changed, 305 insertions(+) create mode 100644 sca-cpp/branches/lightweight-sca/kernel/string.hpp (limited to 'sca-cpp/branches/lightweight-sca/kernel/string.hpp') diff --git a/sca-cpp/branches/lightweight-sca/kernel/string.hpp b/sca-cpp/branches/lightweight-sca/kernel/string.hpp new file mode 100644 index 0000000000..e726a61b84 --- /dev/null +++ b/sca-cpp/branches/lightweight-sca/kernel/string.hpp @@ -0,0 +1,305 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +/* $Rev$ $Date$ */ + +#ifndef tuscany_string_hpp +#define tuscany_string_hpp + +/** + * Simple and fast string type backed by a char buffer + */ + +#include +#include +#include +#include +#include "gc.hpp" + +namespace tuscany { + +#ifdef WANT_MAINTAINER_COUNTERS + +/** + * Debug utilities. Counters used to track string copies. + */ +long countStringCopies = 0; + +bool resetStringCopyCounters() { + countStringCopies = 0; + return true; +} + +bool checkStringCopyCounters(long c) { + return countStringCopies == c; +} + +bool printStringCopyCounters() { + printf("countStringCopies %ld\n", countStringCopies); + return true; +} + +#else + +#define resetStringCopyCounters() +#define checkStringCopyCounters(c) true +#define printStringCopyCounters() + +#endif + +/** + * Instrumented memcpy. + */ +void* string_memcpy(void* t, const void* s, const size_t n) { +#ifdef WANT_MAINTAINER_COUNTERS + countStringCopies += 1; +#endif + return memcpy(t, s, n); +} + +char stringEmptyBuffer[1] = { '\0' }; + +/** + * String class. The maximum string size is specified as a template parameter. + */ +class string { +public: + string() : len(0) { + buf = stringEmptyBuffer; + } + + string(const char* s) { + len = strlen(s); + if (len == 0) { + buf = stringEmptyBuffer; + return; + } + buf = gc_cnew(len + 1); + string_memcpy(buf, s, len + 1); + } + + string(const char* s, const size_t n) { + len = n; + if (len == 0) { + buf = stringEmptyBuffer; + return; + } + buf = gc_cnew(len + 1); + string_memcpy(buf, s, len); + buf[len] = '\0'; + } + + string(const size_t n, const char c) { + len = n; + if (len == 0) { + buf = stringEmptyBuffer; + return; + } + buf = gc_cnew(len + 1); + memset(buf, c, n); + buf[len] = '\0'; + } + + string(const string& s) { + len = s.len; + buf = s.buf; + } + + const string& operator=(const string& s) { + if (&s == this) + return *this; + len = s.len; + buf = s.buf; + return *this; + } + + const bool operator==(const string& s) const { + if (len != s.len) + return false; + if (buf == s.buf) + return true; + return memcmp(buf, s.buf, len) == 0; + } + + const bool operator!=(const string& s) const { + return !(*this == s); + } + + const bool operator==(const char* s) const { + if (buf == s) + return true; + return strcmp(buf, s) == 0; + } + + const bool operator!=(const char* s) const { + return !(*this == s); + } + + const bool operator<(const string& s) const { + const size_t n = len < s.len? len : s.len; + const int c = memcmp(buf, s.buf, n); + if (c < 0) + return true; + if (c == 0) + return len < s.len; + return false; + } + + const bool operator>(const string& s) const { + const size_t n = len < s.len? len : s.len; + int c = memcmp(buf, s.buf, n); + if (c > 0) + return true; + if (c == 0) + return len > s.len; + return false; + } + +private: +#ifdef WANT_MAINTAINER_LOG + friend class odebugstream; +#endif + friend class ostringstream; + friend const string operator+(const string& a, const string& b); + friend const string operator+(const string& a, const char* b); + friend const size_t length(const string& s); + friend const char* c_str(const string& s); + friend const size_t find(const string& s1, const char* s2, const size_t start); + friend const string substr(const string& s, const size_t pos, const size_t n); + + size_t len; + char* buf; +}; + +/** + * Adds two strings. + */ +const string operator+(const string& a, const string& b) { + string s; + s.len = a.len + b.len; + s.buf = gc_cnew(s.len + 1); + string_memcpy(s.buf, a.buf, a.len); + string_memcpy(s.buf + a.len, b.buf, b.len); + s.buf[s.len] = '\0'; + return s; +} + +const string operator+(const string& a, const char* b) { + string s; + const size_t blen = strlen(b); + s.len = a.len + blen; + s.buf = gc_cnew(s.len + 1); + string_memcpy(s.buf, a.buf, a.len); + string_memcpy(s.buf + a.len, b, blen); + s.buf[s.len] = '\0'; + return s; +} + +/** + * Returns the length of a string. + */ +const size_t length(const string& s) { + return s.len; +} + +/** + * Returns a string as a C zero terminated string. + */ +const char* c_str(const string& s) { + return s.buf; +} + +/** + * Find the first occurrence of string s2 in s1, starting at the given position. + */ +const size_t find(const string& s1, const char* s2, const size_t start) { + if (start >= s1.len) + return s1.len; + const char *f = strstr(s1.buf + start, s2); + if (f == NULL) + return s1.len; + return f - s1.buf; +} + +const size_t find(const string& s1, const char* s2) { + return find(s1, s2, 0); +} + +/** + * Return true if string s1 contains s2. + */ +const bool contains(const string& s1, const char* s2) { + return find(s1, s2) != length(s1); +} + +/** + * Find the first occurence of any character from a string in a string. + */ +const size_t find_first_of(const string& s1, const string& s2) { + return strcspn(c_str(s1), c_str(s2)); +} + +/** + * Find the first occurence of a character in a string. + */ +const size_t find(const string& s, const char c) { + const char* cs = c_str(s); + const char* f = strchr(cs, c); + if (f == NULL) + return length(s); + return f - cs; +} + +/** + * Find the last occurence of a character in a string. + */ +const size_t find_last(const string& s, const char c) { + const char* cs = c_str(s); + const char* f = strrchr(cs, c); + if (f == NULL) + return length(s); + return f - cs; +} + +/** + * Return a substring of a string. + */ +const string substr(const string& s, const size_t pos, const size_t n) { + if (pos >= s.len) + return string(); + if (pos + n > s.len) + return string(s.buf + pos, s.len - pos); + return string(s.buf + pos, n); +} + +const string substr(const string& s, const size_t pos) { + return substr(s, pos, length(s)); +} + +/** + * Common string constants. + */ + +string trueString("true"); +string falseString("false"); +string emptyString(""); + +} + +#endif /* tuscany_string_hpp */ -- cgit v1.2.3