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/******************************************************************************
*
* roman.cpp -
*
* $Id: roman.cpp 2980 2013-09-14 21:51:47Z scribe $
*
* Copyright 2002-2013 CrossWire Bible Society (http://www.crosswire.org)
* CrossWire Bible Society
* P. O. Box 2528
* Tempe, AZ 85280-2528
*
* 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 version 2.
*
* 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.
*
*/
#include <stdlib.h>
#include <string.h>
#include <roman.h>
SWORD_NAMESPACE_START
char isroman (const char *str, int maxchars) {
char *ch = (char*)str;
for (; *ch && (!maxchars || (ch-str) <= maxchars); ch++)
if (!strchr("IVXLCDMivxlcdm ", *ch))
return 0;
return 1;
}
int from_rom(const char* str) {
int i, n = strlen(str);
short * num= (short *) calloc(n, sizeof(short));
for (i = 0; str[i]; i++) {
switch(str[i]) {
case 'i':
case 'I':
num[i] = 1;
break;
case 'v':
case 'V':
num[i] = 5;
break;
case 'x':
case 'X':
num[i] = 10;
break;
case 'l':
case 'L':
num[i] = 50;
break;
case 'c':
case 'C':
num[i] = 100;
break;
case 'd':
case 'D':
num[i] = 500;
break;
case 'm':
case 'M':
num[i] = 1000;
break;
default:
num[i] = 0;
}
}
for (i = 1; str[i]; i++) {
if (num[i] > num[i-1]) {
num[i] -= num[i-1];
num[i-1] = 0;
}
}
n = 0;
for (i = 0; str[i]; i++) {
n += num[i];
}
free(num);
return n;
}
SWORD_NAMESPACE_END
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