268 lines
7.5 KiB
C
268 lines
7.5 KiB
C
|
/**
|
||
|
*
|
||
|
* ***** BEGIN GPL LICENSE BLOCK *****
|
||
|
*
|
||
|
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||
|
*
|
||
|
* Contributor(s): Campbell Barton
|
||
|
*
|
||
|
* ***** END GPL LICENSE BLOCK *****
|
||
|
*/
|
||
|
|
||
|
#include <stdlib.h>
|
||
|
#include <stdio.h>
|
||
|
#include <ctype.h>
|
||
|
#include <string.h>
|
||
|
#include <math.h>
|
||
|
|
||
|
/* define a single unit */
|
||
|
typedef struct bUnitDef {
|
||
|
char *name;
|
||
|
|
||
|
/* optional, can be null */
|
||
|
char *name_plural;
|
||
|
char *name_short; /* this is used for display*/
|
||
|
char *name_alt; /* alternative name */
|
||
|
|
||
|
double mul;
|
||
|
double bias;
|
||
|
} bUnitDef;
|
||
|
|
||
|
/* define a single unit */
|
||
|
typedef struct bUnitCollection {
|
||
|
struct bUnitDef *units;
|
||
|
int def; /* default unit, use for 0.0, or none given */
|
||
|
int flag; /* options for this system */
|
||
|
} bUnitCollection;
|
||
|
|
||
|
static struct bUnitDef buMetricLenDef[] = {
|
||
|
{"kilometer", "kilometers", "km", NULL, 1000.0, 0.0},
|
||
|
{"meter", "meters", "m", NULL, 1.0, 0.0},
|
||
|
{"centimeter", "centimeters", "cm", NULL, 0.01, 0.0},
|
||
|
{"millimeter", "millimeters", "mm", NULL, 0.001, 0.0},
|
||
|
{"micrometer", "micrometers", "um", "µm", 0.000001, 0.0}, // micron too?
|
||
|
{"nanometer", "nanometers", "nm", NULL, 0.000000001, 0.0},
|
||
|
{"picometer", "picometers", "pm", NULL, 0.000000000001, 0.0},
|
||
|
{NULL, NULL, NULL, NULL, 0.0, 0.0}
|
||
|
};
|
||
|
static struct bUnitCollection buMetricLenCollecton = {buMetricLenDef, 1, 0};
|
||
|
|
||
|
#define IMPERIAL_DEFAULT 3 /* inch */
|
||
|
static struct bUnitDef buImperialLenDef[] = {
|
||
|
{"mile", "miles", "mi", "m", 1609.344, 0.0},
|
||
|
{"yard", "yards", "yd", NULL, 0.9144, 0.0},
|
||
|
{"foot", "feet", "'", "ft", 0.3048, 0.0},
|
||
|
{"inch", "inches", "\"", "in", 0.0254, 0.0},
|
||
|
{"thou", "thous", "mil", NULL,0.0000254, 0.0},
|
||
|
{NULL, NULL, NULL, NULL, 0.0, 0.0}
|
||
|
};
|
||
|
static struct bUnitCollection buImperialLenCollecton = {buImperialLenDef, 2, 0};
|
||
|
|
||
|
static struct bUnitCollection *bUnitSystems[][8] = {
|
||
|
{0,&buMetricLenCollecton, 0,0,0,0,0,0}, /* metric */
|
||
|
{0,&buImperialLenCollecton, 0,0,0,0,0,0}, /* imperial */
|
||
|
{0,0,0,0,0,0,0,0}
|
||
|
};
|
||
|
|
||
|
/* internal, has some option not exposed */
|
||
|
static bUnitCollection *unit_get_system(int system, int type)
|
||
|
{
|
||
|
return bUnitSystems[system-1][type];
|
||
|
}
|
||
|
|
||
|
static bUnitDef *unit_best_fit(double value, bUnitCollection *usys, bUnitDef *unit_start)
|
||
|
{
|
||
|
bUnitDef *unit;
|
||
|
double value_abs= value>0.0?value:-value;
|
||
|
|
||
|
for(unit= unit_start ? unit_start:usys->units; unit->name; unit++)
|
||
|
if (value_abs >= unit->mul)
|
||
|
return unit;
|
||
|
|
||
|
return &usys->units[usys->def];
|
||
|
}
|
||
|
|
||
|
/* convert into 2 units and 2 values for "2ft, 3inch" syntax */
|
||
|
static void unit_dual_convert(double value, bUnitCollection *usys,
|
||
|
bUnitDef **unit_a, bUnitDef **unit_b, double *value_a, double *value_b)
|
||
|
{
|
||
|
bUnitDef *unit= unit_best_fit(value, usys, NULL);
|
||
|
|
||
|
*value_a= floor(value/unit->mul) * unit->mul;
|
||
|
*value_b= value - (*value_a);
|
||
|
|
||
|
*unit_a= unit;
|
||
|
*unit_b= unit_best_fit(*value_b, usys, *unit_a);
|
||
|
}
|
||
|
|
||
|
static int unit_as_string(char *str, double value, int prec, bUnitCollection *usys,
|
||
|
/* non exposed options */
|
||
|
bUnitDef *unit, char pad)
|
||
|
{
|
||
|
double value_conv;
|
||
|
int len, i;
|
||
|
|
||
|
if(unit) {
|
||
|
/* use unit without finding the best one */
|
||
|
}
|
||
|
else if(value == 0.0) {
|
||
|
/* use the default units since there is no way to convert */
|
||
|
unit= &usys->units[usys->def];
|
||
|
}
|
||
|
else {
|
||
|
unit= unit_best_fit(value, usys, NULL);
|
||
|
}
|
||
|
|
||
|
value_conv= value/unit->mul;
|
||
|
|
||
|
/* Convert to a string */
|
||
|
{
|
||
|
char conv_str[5] = {'%', '.', '0'+prec, 'f', '\0'}; /* "%.2f" when prec is 2, must be under 10 */
|
||
|
len= sprintf(str, conv_str, (float)value_conv);
|
||
|
}
|
||
|
|
||
|
|
||
|
/* Add unit prefix and strip zeros */
|
||
|
{
|
||
|
/* replace trailing zero's with spaces
|
||
|
* so the number is less complicated but allignment in a button wont
|
||
|
* jump about while dragging */
|
||
|
int j;
|
||
|
i= len-1;
|
||
|
|
||
|
|
||
|
while(i>0 && str[i]=='0') { /* 4.300 -> 4.3 */
|
||
|
str[i--]= pad;
|
||
|
}
|
||
|
|
||
|
if(i>0 && str[i]=='.') { /* 10. -> 10 */
|
||
|
str[i--]= pad;
|
||
|
}
|
||
|
|
||
|
/* Now add the suffix */
|
||
|
i++;
|
||
|
j=0;
|
||
|
while(unit->name_short[j]) {
|
||
|
str[i++]= unit->name_short[j++];
|
||
|
}
|
||
|
|
||
|
if(pad) {
|
||
|
/* this loop only runs if so many zeros were removed that
|
||
|
* the unit name only used padded chars,
|
||
|
* In that case add padding for the name. */
|
||
|
|
||
|
while(i<=len+j) {
|
||
|
str[i++]= pad;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/* terminate no matter whats done with padding above */
|
||
|
str[i] = '\0';
|
||
|
}
|
||
|
|
||
|
return i;
|
||
|
}
|
||
|
|
||
|
/* Used for drawing number buttons, try keep fast */
|
||
|
void bUnit_AsString(char *str, double value, int prec, int system, int type, int split, int pad)
|
||
|
{
|
||
|
bUnitCollection *usys = unit_get_system(system, type);
|
||
|
|
||
|
if(split) {
|
||
|
int i;
|
||
|
bUnitDef *unit_a, *unit_b;
|
||
|
double value_a, value_b;
|
||
|
|
||
|
unit_dual_convert(value, usys, &unit_a, &unit_b, &value_a, &value_b);
|
||
|
|
||
|
/* check the 2 is a smaller unit */
|
||
|
if(unit_b > unit_a) {
|
||
|
i= unit_as_string(str, value_a, prec, usys, unit_a, '\0');
|
||
|
i= strlen(str);
|
||
|
str[i++]= ',';
|
||
|
str[i++]= ' ';
|
||
|
|
||
|
/* use low precision since this is a smaller unit */
|
||
|
unit_as_string(str+i, value_b, prec?1:0, usys, unit_b, '\0');
|
||
|
return;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
unit_as_string(str, value, prec, usys, NULL, pad?' ':'\0');
|
||
|
}
|
||
|
|
||
|
|
||
|
static int unit_scale_str(char *str, char *str_tmp, double scale_pref, bUnitDef *unit, char *replace_str)
|
||
|
{
|
||
|
char *str_found;
|
||
|
int change= 0;
|
||
|
|
||
|
if(replace_str && (str_found= strstr(str, replace_str))) {
|
||
|
/* previous char cannot be a letter */
|
||
|
if (str_found == str || isalpha(*(str_found-1))==0) {
|
||
|
int len_name = strlen(replace_str);
|
||
|
|
||
|
/* next char cannot be alphanum */
|
||
|
if (!isalpha(*(str_found+len_name))) {
|
||
|
int len= strlen(str);
|
||
|
int len_num= sprintf(str_tmp, "*%g", scale_pref*unit->mul);
|
||
|
memmove(str_found+len_num, str_found+len_name, (len+1)-(int)((str_found+len_name)-str)); /* may grow or shrink the string, 1+ to copy the string terminator */
|
||
|
memcpy(str_found, str_tmp, len_num); /* without the string terminator */
|
||
|
change= 1;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
return change;
|
||
|
}
|
||
|
|
||
|
static int unit_replace(char *str, char *str_tmp, double scale_pref, bUnitDef *unit)
|
||
|
{
|
||
|
//unit_replace_delimit(str, str_tmp);
|
||
|
int change= 0;
|
||
|
change |= unit_scale_str(str, str_tmp, scale_pref, unit, unit->name_short);
|
||
|
change |= unit_scale_str(str, str_tmp, scale_pref, unit, unit->name_plural);
|
||
|
change |= unit_scale_str(str, str_tmp, scale_pref, unit, unit->name_alt);
|
||
|
change |= unit_scale_str(str, str_tmp, scale_pref, unit, unit->name);
|
||
|
return change;
|
||
|
}
|
||
|
|
||
|
/* make a copy of the string that replaces the units with numbers
|
||
|
* this is used before parsing
|
||
|
* This is only used when evaluating user input and can afford to be a bit slower
|
||
|
*
|
||
|
* This is to be used before python evaluation so..
|
||
|
* 10.1km -> 10.1*1000.0
|
||
|
* ...will be resolved by python.
|
||
|
*
|
||
|
* return true of a change was made.
|
||
|
*/
|
||
|
int bUnit_ReplaceString(char *str, char *str_orig, double scale_pref, int system, int type)
|
||
|
{
|
||
|
bUnitCollection *usys = unit_get_system(system, type);
|
||
|
bUnitDef *unit;
|
||
|
char str_tmp[256];
|
||
|
int change= 0;
|
||
|
|
||
|
strcpy(str, str_orig);
|
||
|
|
||
|
for(unit= usys->units; unit->name; unit++) {
|
||
|
/* incase there are multiple instances */
|
||
|
while(unit_replace(str, str_tmp, scale_pref, unit))
|
||
|
change= 1;
|
||
|
}
|
||
|
|
||
|
return change;
|
||
|
}
|