/* $Id$
This file is part of libmspstrings
-Copyright © 2006-2007 Mikko Rasa
+Copyright © 2006-2008 Mikko Rasa
Distributed under the LGPL
*/
+#include <algorithm>
#include <list>
+#include <msp/core/except.h>
#include "utils.h"
using namespace std;
-namespace Msp {
+namespace {
-/**
-Compares two strings, ignoring case.
+template<bool long_sep, bool allow_empty>
+vector<string> do_split(const string &str, const string &sep, int max_split)
+{
+ vector<string> result;
-@param s1 First string
-@param s2 Second string
+ unsigned start=0;
+ while(start<str.size())
+ {
+ unsigned end=long_sep ? str.find(sep, start) : str.find_first_of(sep, start);
+ if(end!=start || allow_empty)
+ {
+ if(max_split>=0 && result.size()==static_cast<unsigned>(max_split))
+ {
+ result.push_back(str.substr(start));
+ break;
+ }
+ else
+ result.push_back(str.substr(start, end-start));
+ }
+
+ if(end>str.size())
+ break;
+
+ start=end+(long_sep ? sep.size() : 1);
+
+ if(allow_empty && start==str.size())
+ result.push_back(string());
+ }
+
+ return result;
+}
+
+bool check_str(const std::string &str, int (*pred)(int))
+{
+ for(string::const_iterator i=str.begin(); i!=str.end(); ++i)
+ if(!pred(*i))
+ return false;
+ return true;
+}
+
+}
+
+namespace Msp {
-@return -1 if s1<s2, 0 if s1==s2, 1 if s1>s2
-*/
int strcasecmp(const string &s1, const string &s2)
{
string::const_iterator i1=s1.begin();
return 0;
}
-/**
-Returns a lowercase copy of the given string.
-*/
string tolower(const string &str)
{
string result(str);
return result;
}
-/**
-Returns an uppercase copy of the given string.
-*/
string toupper(const string &str)
{
string result(str);
return result;
}
+bool isnumrc(const string &str)
+{
+ return check_str(str, isdigit);
+}
+
+bool isalpha(const string &str)
+{
+ return check_str(str, isalpha);
+}
+
+bool isalnum(const string &str)
+{
+ return check_str(str, isalnum);
+}
+
+vector<string> split(const string &str, const string &sep, int max_split)
+{
+ return do_split<false, false>(str, sep, max_split);
+}
+
+vector<string> split(const string &str, char sep, int max_split)
+{
+ return split(str, string(1, sep), max_split);
+}
+
+vector<string> split_long(const string &str, const string &sep, int max_split)
+{
+ return do_split<true, false>(str, sep, max_split);
+}
+
+vector<string> split_fields(const string &str, const string &sep, int max_split)
+{
+ return do_split<true, true>(str, sep, max_split);
+}
+
+vector<string> split_fields(const string &str, char sep, int max_split)
+{
+ return split_fields(str, string(1, sep), max_split);
+}
+
/**
Splits a string to parts.
return split(str, string(1, sep), allow_empty);
}
-/**
-Builds a single string from the strings in the given sequence by concatenating
-them.
+string strip(const string &s)
+{
+ string result=s;
+ if(!result.erase(0, result.find_first_not_of(" \t\r\n")).empty())
+ result.erase(result.find_last_not_of(" \t\r\n")+1);
+ return result;
+}
-@param seq A sequence of strings
-@param sep Separator to be inserted between strings
-*/
-template<typename T>
-string join(const T &seq, const string &sep)
+string c_unescape(const std::string &str)
{
+ bool escape=false;
+ unsigned numeric_type=0;
+ unsigned numeric_pos=0;
+ unsigned numeric_value=0;
string result;
- for(typename T::const_iterator i=seq.begin(); i!=seq.end(); ++i)
+ for(string::const_iterator i=str.begin(); i!=str.end(); ++i)
{
- if(i!=seq.begin())
- result+=sep;
- result+=*i;
+ if(numeric_type==16)
+ {
+ unsigned digit=0;
+ if(*i>='0' && *i<='9')
+ digit=*i-'0';
+ else if(*i>='a' && *i<='f')
+ digit=*i-'a'+10;
+ else if(*i>='A' && *i<='F')
+ digit=*i-'A'+10;
+ else
+ throw InvalidParameterValue("Invalid hexadecimal digit");
+
+ numeric_value=(numeric_value<<4 | digit);
+ ++numeric_pos;
+ if(numeric_pos==2)
+ {
+ result+=numeric_value;
+ numeric_type=0;
+ }
+ }
+ else if(numeric_type==8)
+ {
+ unsigned digit=0;
+ if(*i>='0' && *i<='7')
+ digit=*i-'0';
+ else
+ throw InvalidParameterValue("Invalid octal digit");
+
+ numeric_value=(numeric_value<<3 | digit);
+ ++numeric_pos;
+ if(numeric_pos==3)
+ {
+ result+=numeric_value;
+ numeric_type=0;
+ }
+ }
+ else if(escape)
+ {
+ if(*i=='x')
+ {
+ numeric_type=16;
+ numeric_pos=0;
+ numeric_value=0;
+ }
+ else if(*i>='0' && *i<='3')
+ {
+ numeric_type=8;
+ numeric_pos=1;
+ numeric_value=*i-'0';
+ }
+ else if(*i=='n')
+ result+='\n';
+ else if(*i=='t')
+ result+='\t';
+ else if(*i=='r')
+ result+='\r';
+ else if(*i=='b')
+ result+='\b';
+ else if(*i=='v')
+ result+='\v';
+ else if(*i=='a')
+ result+='\a';
+ else if(*i=='f')
+ result+='\f';
+ else if(*i=='\"')
+ result+='\"';
+ else if(*i=='\'')
+ result+='\'';
+ else if(*i=='\\')
+ result+='\\';
+ else
+ throw InvalidParameterValue("Invalid escape sequence");
+
+ escape=false;
+ }
+ else if(*i=='\\')
+ escape=true;
+ else
+ result+=*i;
}
+ if(escape)
+ throw InvalidParameterValue("Stray backslash at end of string");
+
return result;
}
-template string join<list<string> >(const list<string> &, const string &);
-template string join<vector<string> >(const vector<string> &, const string &);
-/**
-Returns a copy of the given string with leading and trailing whitespace
-removed.
-*/
-string strip(const string &s)
+string c_escape(const string &str, bool escape_8bit)
{
- string result=s;
- if(!result.erase(0, result.find_first_not_of(" \t\n")).empty())
- result.erase(result.find_last_not_of(" \t\n")+1);
+ string result;
+
+ for(string::const_iterator i=str.begin(); i!=str.end(); ++i)
+ {
+ if(*i=='\n')
+ result+="\\n";
+ else if(*i=='\t')
+ result+="\\t";
+ else if(*i=='\r')
+ result+="\\r";
+ else if(*i=='\b')
+ result+="\\b";
+ else if(*i=='\v')
+ result+="\\v";
+ else if(*i=='\a')
+ result+="\\a";
+ else if(*i=='\f')
+ result+="\\f";
+ else if(*i=='\"')
+ result+="\\\"";
+ else if(*i=='\'')
+ result+="\\\'";
+ else if(*i=='\\')
+ result+="\\\\";
+ else if(static_cast<unsigned char>(*i)<' ' || (escape_8bit && (*i&0x80)))
+ {
+ char buf[4]={'\\', '0'+((*i>>6)&3), '0'+((*i>>3)&7), '0'+(*i&7)};
+ result.append(buf, 4);
+ }
+ else
+ result+=*i;
+ }
+
return result;
}
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