1 /* 2 * Copyright 2017 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkFloatToDecimal_DEFINED 9 #define SkFloatToDecimal_DEFINED 10 11 constexpr unsigned kMaximumSkFloatToDecimalLength = 49; 12 13 /** \fn SkFloatToDecimal 14 Convert a float into a decimal string. 15 16 The resulting string will be in the form `[-]?([0-9]*\.)?[0-9]+` (It does 17 not use scientific notation.) and `sscanf(output, "%f", &x)` will return 18 the original value if the value is finite. This function accepts all 19 possible input values. 20 21 INFINITY and -INFINITY are rounded to FLT_MAX and -FLT_MAX. 22 23 NAN values are converted to 0. 24 25 This function will always add a terminating '\0' to the output. 26 27 @param value Any floating-point number 28 @param output The buffer to write the string into. Must be non-null. 29 30 @return strlen(output) 31 */ 32 unsigned SkFloatToDecimal(float value, char output[kMaximumSkFloatToDecimalLength]); 33 34 #endif // SkFloatToDecimal_DEFINED 35
