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annotate utils.c @ 260:3622e24a443f

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author Daniele Nicolodi <daniele.nicolodi@obspm.fr>
date Tue, 16 Jun 2015 15:06:19 +0200
parents be87c8e78266
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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144
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1 #include <ansi_c.h>
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2
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3 const char * thousands(char *buffer, int size, char *fmt, double val)
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4 {
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5 /* compute how many separators we need */
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6 #pragma DisableFunctionRuntimeChecking log10
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7 int nsep = log10(fabs(val));
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8 nsep = (nsep > 0 ? nsep / 3 : 0);
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9 /* format value */
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10 int len = snprintf(buffer, size, fmt, val);
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11 char *src = buffer + len;
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12 char *dst = src + nsep;
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13 /* copy till decimal separator */
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14 while (*src != '.')
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15 *dst-- = *src--;
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16 /* the next char is the decimal separator */
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17 int n = -1;
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18 /* copy till src and dst point to the same location */
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19 while (src != dst) {
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20 *dst-- = *src--;
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21 /* insert separator */
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22 if (isdigit(*src) && (++n) && ((n % 3) == 0))
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23 *dst-- = ' ';
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24 }
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25 return buffer;
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26 }
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27
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28
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29 double Peta(double x)
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30 {
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31 return 1.0e15 * x;
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32 }
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33
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34 double Tera(double x)
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35 {
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36 return 1.0e12 * x;
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37 }
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38
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39 double Giga(double x)
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40 {
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41 return 1.0e9 * x;
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42 }
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43
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44 double Mega(double x)
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45 {
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46 return 1.0e6 * x;
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47 }
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48
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49 double kilo(double x)
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50 {
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51 return 1.0e3 * x;
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52 }
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53
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54 double milli(double x)
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55 {
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56 return 1.0e-3 * x;
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57 }
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58
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59 double micro(double x)
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60 {
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61 return 1.0e-6 * x;
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62 }
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63
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64 double nano(double x)
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65 {
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66 return 1.0e-9 * x;
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67 }
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68
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69 double pico(double x)
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70 {
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71 return 1.e-12 * x;
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72 }
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73
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74 double femto(double x)
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75 {
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76 return 1.0e-15 * x;
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77 }
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78