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/* utils.cc: string conversion utility functions for omega
*
* Copyright 1999,2000,2001 BrightStation PLC
* Copyright 2003,2004,2006,2010,2011 Olly Betts
*
* This program 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 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
* USA
*/
#include <config.h>
#include "utils.h"
#include <cassert>
#include <stdio.h> // for sprintf/snprintf
#include <cstdlib>
#include <string>
using namespace std;
// This ought to be enough for any of the conversions below.
#define BUFSIZE 100
#ifdef SNPRINTF
#define CONVERT_TO_STRING(FMT) \
char buf[BUFSIZE];\
int len = SNPRINTF(buf, BUFSIZE, (FMT), val);\
if (len == -1 || len > BUFSIZE) return string(buf, BUFSIZE);\
return string(buf, len);
#else
#define CONVERT_TO_STRING(FMT) \
char buf[BUFSIZE];\
buf[BUFSIZE - 1] = '\0';\
sprintf(buf, (FMT), val);\
if (buf[BUFSIZE - 1]) abort(); /* Uh-oh, buffer overrun */ \
return string(buf);
#endif
int
string_to_int(const string &s)
{
return atoi(s.c_str());
}
string
double_to_string(double val)
{
CONVERT_TO_STRING("%f")
}
string
date_to_string(int y, int m, int d)
{
char buf[11];
if (y < 0) y = 0; else if (y > 9999) y = 9999;
if (m < 1) m = 1; else if (m > 12) m = 12;
if (d < 1) d = 1; else if (d > 31) d = 31;
#ifdef SNPRINTF
int len = SNPRINTF(buf, sizeof(buf), "%04d%02d%02d", y, m, d);
if (len == -1 || len > int(sizeof(buf))) return string(buf, sizeof(buf));
return string(buf, len);
#else
buf[sizeof(buf) - 1] = '\0';
sprintf(buf, "%04d%02d%02d", y, m, d);
if (buf[sizeof(buf) - 1]) abort(); /* Uh-oh, buffer overrun */
return string(buf);
#endif
}
void
trim(string & s)
{
string::size_type first_nonspace;
first_nonspace = s.find_first_not_of(" \t\r\n\v");
if (first_nonspace == string::npos) {
// String is all whitespace.
s.resize(0);
} else {
// Remove any trailing whitespace.
string::size_type len = s.find_last_not_of(" \t\r\n\v");
assert(len != string::npos);
if (len < s.size() - 1)
s.resize(len + 1);
// Remove any leading whitespace.
if (first_nonspace > 0)
s.erase(0, first_nonspace);
}
}
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