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comparison FXAnalyse.c @ 128:8a69c40f10b2

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Fix thousands separators number formatting function.
author Daniele Nicolodi <daniele.nicolodi@obspm.fr>
date Mon, 16 Dec 2013 19:50:20 +0100
parents 2479ad53982b
children 24db0c2d5219
comparison
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127:2479ad53982b 128:8a69c40f10b2
160 160
161 161
162 char * thousands(char *buffer, int size, char *fmt, double val) 162 char * thousands(char *buffer, int size, char *fmt, double val)
163 { 163 {
164 // compute how many separators we need 164 // compute how many separators we need
165 int nsep = (int)(log10(fabs(val)+1.0))/3; 165 #pragma DisableFunctionRuntimeChecking log10
166 int nsep = log10(fabs(val)) / 3;
166 // format value 167 // format value
167 int len = snprintf(buffer, size, fmt, val); 168 int len = snprintf(buffer, size, fmt, val);
168 char *src = buffer + len + 1; 169 char *src = buffer + len;
169 char *dst = src + nsep; 170 char *dst = src + nsep;
170 // copy till decimal separator 171 // copy till decimal separator
171 while (*src != '.') 172 while (*src != '.')
172 *dst-- = *src--; 173 *dst-- = *src--;
173 // copy till the beginning inserting separators 174 // the next char is the decimal separator
174 int n = -1; 175 int n = -1;
175 while (1) { 176 // copy till src and dst point to the same location
177 while (src != dst) {
176 *dst-- = *src--; 178 *dst-- = *src--;
179 // insert separator
177 if (isdigit(*src) && (++n) && ((n % 3) == 0)) 180 if (isdigit(*src) && (++n) && ((n % 3) == 0))
178 *dst-- = ' '; 181 *dst-- = ' ';
179 if (src == buffer)
180 break;
181 } 182 }
182 return buffer; 183 return buffer;
183 } 184 }
184 185
185 186