1*c8dee2aaSAndroid Build Coastguard Worker /* 2*c8dee2aaSAndroid Build Coastguard Worker * Copyright 2017 Google Inc. 3*c8dee2aaSAndroid Build Coastguard Worker * 4*c8dee2aaSAndroid Build Coastguard Worker * Use of this source code is governed by a BSD-style license that can be 5*c8dee2aaSAndroid Build Coastguard Worker * found in the LICENSE file. 6*c8dee2aaSAndroid Build Coastguard Worker */ 7*c8dee2aaSAndroid Build Coastguard Worker 8*c8dee2aaSAndroid Build Coastguard Worker #ifndef SkFloatToDecimal_DEFINED 9*c8dee2aaSAndroid Build Coastguard Worker #define SkFloatToDecimal_DEFINED 10*c8dee2aaSAndroid Build Coastguard Worker 11*c8dee2aaSAndroid Build Coastguard Worker constexpr unsigned kMaximumSkFloatToDecimalLength = 49; 12*c8dee2aaSAndroid Build Coastguard Worker 13*c8dee2aaSAndroid Build Coastguard Worker /** \fn SkFloatToDecimal 14*c8dee2aaSAndroid Build Coastguard Worker Convert a float into a decimal string. 15*c8dee2aaSAndroid Build Coastguard Worker 16*c8dee2aaSAndroid Build Coastguard Worker The resulting string will be in the form `[-]?([0-9]*\.)?[0-9]+` (It does 17*c8dee2aaSAndroid Build Coastguard Worker not use scientific notation.) and `sscanf(output, "%f", &x)` will return 18*c8dee2aaSAndroid Build Coastguard Worker the original value if the value is finite. This function accepts all 19*c8dee2aaSAndroid Build Coastguard Worker possible input values. 20*c8dee2aaSAndroid Build Coastguard Worker 21*c8dee2aaSAndroid Build Coastguard Worker INFINITY and -INFINITY are rounded to FLT_MAX and -FLT_MAX. 22*c8dee2aaSAndroid Build Coastguard Worker 23*c8dee2aaSAndroid Build Coastguard Worker NAN values are converted to 0. 24*c8dee2aaSAndroid Build Coastguard Worker 25*c8dee2aaSAndroid Build Coastguard Worker This function will always add a terminating '\0' to the output. 26*c8dee2aaSAndroid Build Coastguard Worker 27*c8dee2aaSAndroid Build Coastguard Worker @param value Any floating-point number 28*c8dee2aaSAndroid Build Coastguard Worker @param output The buffer to write the string into. Must be non-null. 29*c8dee2aaSAndroid Build Coastguard Worker 30*c8dee2aaSAndroid Build Coastguard Worker @return strlen(output) 31*c8dee2aaSAndroid Build Coastguard Worker */ 32*c8dee2aaSAndroid Build Coastguard Worker unsigned SkFloatToDecimal(float value, char output[kMaximumSkFloatToDecimalLength]); 33*c8dee2aaSAndroid Build Coastguard Worker 34*c8dee2aaSAndroid Build Coastguard Worker #endif // SkFloatToDecimal_DEFINED 35