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+/* Defines String::compose(fmt, arg...) for easy, i18n-friendly
+ * composition of strings.
+ *
+ * Version 1.0.
+ *
+ * Copyright (c) 2002 Ole Laursen <olau@hardworking.dk>.
+ *
+ * This library 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 2.1 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 library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA.
+ */
+
+//
+// Basic usage is like
+//
+// std::cout << String::compose("This is a %1x%2 matrix.", rows, cols);
+//
+// See http://www.cs.auc.dk/~olau/compose/ or the included README.compose for
+// more details.
+//
+
+#ifndef STRING_COMPOSE_H
+#define STRING_COMPOSE_H
+
+#include <sstream>
+#include <string>
+#include <list>
+#include <map> // for multimap
+
+namespace StringPrivate
+{
+ // the actual composition class - using string::compose is cleaner, so we
+ // hide it here
+ class Composition
+ {
+ public:
+ // initialize and prepare format string on the form "text %1 text %2 etc."
+ explicit Composition(std::string fmt);
+
+ // supply an replacement argument starting from %1
+ template <typename T>
+ Composition &arg(const T &obj);
+
+ // compose and return string
+ std::string str() const;
+
+ private:
+ std::ostringstream os;
+ int arg_no;
+
+ // we store the output as a list - when the output string is requested, the
+ // list is concatenated to a string; this way we can keep iterators into
+ // the list instead of into a string where they're possibly invalidated on
+ // inserting a specification string
+ typedef std::list<std::string> output_list;
+ output_list output;
+
+ // the initial parse of the format string fills in the specification map
+ // with positions for each of the various %?s
+ typedef std::multimap<int, output_list::iterator> specification_map;
+ specification_map specs;
+ };
+
+ // helper for converting spec string numbers
+ inline int char_to_int(char c)
+ {
+ switch (c) {
+ case '0': return 0;
+ case '1': return 1;
+ case '2': return 2;
+ case '3': return 3;
+ case '4': return 4;
+ case '5': return 5;
+ case '6': return 6;
+ case '7': return 7;
+ case '8': return 8;
+ case '9': return 9;
+ default: return -1000;
+ }
+ }
+
+ inline bool is_number(int n)
+ {
+ switch (n) {
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ return true;
+
+ default:
+ return false;
+ }
+ }
+
+
+ // implementation of class Composition
+ template <typename T>
+ inline Composition &Composition::arg(const T &obj)
+ {
+ os << obj;
+
+ std::string rep = os.str();
+
+ if (!rep.empty()) { // manipulators don't produce output
+ for (specification_map::const_iterator i = specs.lower_bound(arg_no),
+ end = specs.upper_bound(arg_no); i != end; ++i) {
+ output_list::iterator pos = i->second;
+ ++pos;
+
+ output.insert(pos, rep);
+ }
+
+ os.str(std::string());
+ //os.clear();
+ ++arg_no;
+ }
+
+ return *this;
+ }
+
+ inline Composition::Composition(std::string fmt)
+ : arg_no(1)
+ {
+ std::string::size_type b = 0, i = 0;
+
+ // fill in output with the strings between the %1 %2 %3 etc. and
+ // fill in specs with the positions
+ while (i < fmt.length()) {
+ if (fmt[i] == '%' && i + 1 < fmt.length()) {
+ if (fmt[i + 1] == '%') { // catch %%
+ fmt.replace(i, 2, "%");
+ ++i;
+ }
+ else if (is_number(fmt[i + 1])) { // aha! a spec!
+ // save string
+ output.push_back(fmt.substr(b, i - b));
+
+ int n = 1; // number of digits
+ int spec_no = 0;
+
+ do {
+ spec_no += char_to_int(fmt[i + n]);
+ spec_no *= 10;
+ ++n;
+ } while (i + n < fmt.length() && is_number(fmt[i + n]));
+
+ spec_no /= 10;
+ output_list::iterator pos = output.end();
+ --pos; // safe since we have just inserted a string>
+
+ specs.insert(specification_map::value_type(spec_no, pos));
+
+ // jump over spec string
+ i += n;
+ b = i;
+ }
+ else
+ ++i;
+ }
+ else
+ ++i;
+ }
+
+ if (i - b > 0) // add the rest of the string
+ output.push_back(fmt.substr(b, i - b));
+ }
+
+ inline std::string Composition::str() const
+ {
+ // assemble string
+ std::string str;
+
+ for (output_list::const_iterator i = output.begin(), end = output.end();
+ i != end; ++i)
+ str += *i;
+
+ return str;
+ }
+}
+
+// now for the real thing(s)
+//namespace PBD
+//{
+ // a series of functions which accept a format string on the form "text %1
+ // more %2 less %3" and a number of templated parameters and spits out the
+ // composited string
+ template <typename T1>
+ inline std::string string_compose(const std::string &fmt, const T1 &o1)
+ {
+ StringPrivate::Composition c(fmt);
+ c.arg(o1);
+ return c.str();
+ }
+
+ template <typename T1, typename T2>
+ inline std::string string_compose(const std::string &fmt,
+ const T1 &o1, const T2 &o2)
+ {
+ StringPrivate::Composition c(fmt);
+ c.arg(o1).arg(o2);
+ return c.str();
+ }
+
+ template <typename T1, typename T2, typename T3>
+ inline std::string string_compose(const std::string &fmt,
+ const T1 &o1, const T2 &o2, const T3 &o3)
+ {
+ StringPrivate::Composition c(fmt);
+ c.arg(o1).arg(o2).arg(o3);
+ return c.str();
+ }
+
+ template <typename T1, typename T2, typename T3, typename T4>
+ inline std::string string_compose(const std::string &fmt,
+ const T1 &o1, const T2 &o2, const T3 &o3,
+ const T4 &o4)
+ {
+ StringPrivate::Composition c(fmt);
+ c.arg(o1).arg(o2).arg(o3).arg(o4);
+ return c.str();
+ }
+
+ template <typename T1, typename T2, typename T3, typename T4, typename T5>
+ inline std::string string_compose(const std::string &fmt,
+ const T1 &o1, const T2 &o2, const T3 &o3,
+ const T4 &o4, const T5 &o5)
+ {
+ StringPrivate::Composition c(fmt);
+ c.arg(o1).arg(o2).arg(o3).arg(o4).arg(o5);
+ return c.str();
+ }
+
+ template <typename T1, typename T2, typename T3, typename T4, typename T5,
+ typename T6>
+ inline std::string string_compose(const std::string &fmt,
+ const T1 &o1, const T2 &o2, const T3 &o3,
+ const T4 &o4, const T5 &o5, const T6 &o6)
+ {
+ StringPrivate::Composition c(fmt);
+ c.arg(o1).arg(o2).arg(o3).arg(o4).arg(o5).arg(o6);
+ return c.str();
+ }
+
+ template <typename T1, typename T2, typename T3, typename T4, typename T5,
+ typename T6, typename T7>
+ inline std::string string_compose(const std::string &fmt,
+ const T1 &o1, const T2 &o2, const T3 &o3,
+ const T4 &o4, const T5 &o5, const T6 &o6,
+ const T7 &o7)
+ {
+ StringPrivate::Composition c(fmt);
+ c.arg(o1).arg(o2).arg(o3).arg(o4).arg(o5).arg(o6).arg(o7);
+ return c.str();
+ }
+
+ template <typename T1, typename T2, typename T3, typename T4, typename T5,
+ typename T6, typename T7, typename T8>
+ inline std::string string_compose(const std::string &fmt,
+ const T1 &o1, const T2 &o2, const T3 &o3,
+ const T4 &o4, const T5 &o5, const T6 &o6,
+ const T7 &o7, const T8 &o8)
+ {
+ StringPrivate::Composition c(fmt);
+ c.arg(o1).arg(o2).arg(o3).arg(o4).arg(o5).arg(o6).arg(o7).arg(o8);
+ return c.str();
+ }
+
+ template <typename T1, typename T2, typename T3, typename T4, typename T5,
+ typename T6, typename T7, typename T8, typename T9>
+ inline std::string string_compose(const std::string &fmt,
+ const T1 &o1, const T2 &o2, const T3 &o3,
+ const T4 &o4, const T5 &o5, const T6 &o6,
+ const T7 &o7, const T8 &o8, const T9 &o9)
+ {
+ StringPrivate::Composition c(fmt);
+ c.arg(o1).arg(o2).arg(o3).arg(o4).arg(o5).arg(o6).arg(o7).arg(o8).arg(o9);
+ return c.str();
+ }
+
+ template <typename T1, typename T2, typename T3, typename T4, typename T5,
+ typename T6, typename T7, typename T8, typename T9, typename T10>
+ inline std::string string_compose(const std::string &fmt,
+ const T1 &o1, const T2 &o2, const T3 &o3,
+ const T4 &o4, const T5 &o5, const T6 &o6,
+ const T7 &o7, const T8 &o8, const T9 &o9,
+ const T10 &o10)
+ {
+ StringPrivate::Composition c(fmt);
+ c.arg(o1).arg(o2).arg(o3).arg(o4).arg(o5).arg(o6).arg(o7).arg(o8).arg(o9)
+ .arg(o10);
+ return c.str();
+ }
+
+ template <typename T1, typename T2, typename T3, typename T4, typename T5,
+ typename T6, typename T7, typename T8, typename T9, typename T10,
+ typename T11>
+ inline std::string string_compose(const std::string &fmt,
+ const T1 &o1, const T2 &o2, const T3 &o3,
+ const T4 &o4, const T5 &o5, const T6 &o6,
+ const T7 &o7, const T8 &o8, const T9 &o9,
+ const T10 &o10, const T11 &o11)
+ {
+ StringPrivate::Composition c(fmt);
+ c.arg(o1).arg(o2).arg(o3).arg(o4).arg(o5).arg(o6).arg(o7).arg(o8).arg(o9)
+ .arg(o10).arg(o11);
+ return c.str();
+ }
+
+ template <typename T1, typename T2, typename T3, typename T4, typename T5,
+ typename T6, typename T7, typename T8, typename T9, typename T10,
+ typename T11, typename T12>
+ inline std::string string_compose(const std::string &fmt,
+ const T1 &o1, const T2 &o2, const T3 &o3,
+ const T4 &o4, const T5 &o5, const T6 &o6,
+ const T7 &o7, const T8 &o8, const T9 &o9,
+ const T10 &o10, const T11 &o11, const T12 &o12)
+ {
+ StringPrivate::Composition c(fmt);
+ c.arg(o1).arg(o2).arg(o3).arg(o4).arg(o5).arg(o6).arg(o7).arg(o8).arg(o9)
+ .arg(o10).arg(o11).arg(o12);
+ return c.str();
+ }
+
+ template <typename T1, typename T2, typename T3, typename T4, typename T5,
+ typename T6, typename T7, typename T8, typename T9, typename T10,
+ typename T11, typename T12, typename T13>
+ inline std::string string_compose(const std::string &fmt,
+ const T1 &o1, const T2 &o2, const T3 &o3,
+ const T4 &o4, const T5 &o5, const T6 &o6,
+ const T7 &o7, const T8 &o8, const T9 &o9,
+ const T10 &o10, const T11 &o11, const T12 &o12,
+ const T13 &o13)
+ {
+ StringPrivate::Composition c(fmt);
+ c.arg(o1).arg(o2).arg(o3).arg(o4).arg(o5).arg(o6).arg(o7).arg(o8).arg(o9)
+ .arg(o10).arg(o11).arg(o12).arg(o13);
+ return c.str();
+ }
+
+ template <typename T1, typename T2, typename T3, typename T4, typename T5,
+ typename T6, typename T7, typename T8, typename T9, typename T10,
+ typename T11, typename T12, typename T13, typename T14>
+ inline std::string string_compose(const std::string &fmt,
+ const T1 &o1, const T2 &o2, const T3 &o3,
+ const T4 &o4, const T5 &o5, const T6 &o6,
+ const T7 &o7, const T8 &o8, const T9 &o9,
+ const T10 &o10, const T11 &o11, const T12 &o12,
+ const T13 &o13, const T14 &o14)
+ {
+ StringPrivate::Composition c(fmt);
+ c.arg(o1).arg(o2).arg(o3).arg(o4).arg(o5).arg(o6).arg(o7).arg(o8).arg(o9)
+ .arg(o10).arg(o11).arg(o12).arg(o13).arg(o14);
+ return c.str();
+ }
+
+ template <typename T1, typename T2, typename T3, typename T4, typename T5,
+ typename T6, typename T7, typename T8, typename T9, typename T10,
+ typename T11, typename T12, typename T13, typename T14,
+ typename T15>
+ inline std::string string_compose(const std::string &fmt,
+ const T1 &o1, const T2 &o2, const T3 &o3,
+ const T4 &o4, const T5 &o5, const T6 &o6,
+ const T7 &o7, const T8 &o8, const T9 &o9,
+ const T10 &o10, const T11 &o11, const T12 &o12,
+ const T13 &o13, const T14 &o14, const T15 &o15)
+ {
+ StringPrivate::Composition c(fmt);
+ c.arg(o1).arg(o2).arg(o3).arg(o4).arg(o5).arg(o6).arg(o7).arg(o8).arg(o9)
+ .arg(o10).arg(o11).arg(o12).arg(o13).arg(o14).arg(o15);
+ return c.str();
+ }
+//}
+
+
+#endif // STRING_COMPOSE_H
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