/usr/include/python2.7/dtoa.h is in python2.7-dev 2.7.3-0ubuntu3.9.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | #ifndef PY_NO_SHORT_FLOAT_REPR
#ifdef __cplusplus
extern "C" {
#endif
PyAPI_FUNC(double) _Py_dg_strtod(const char *str, char **ptr);
PyAPI_FUNC(char *) _Py_dg_dtoa(double d, int mode, int ndigits,
int *decpt, int *sign, char **rve);
PyAPI_FUNC(void) _Py_dg_freedtoa(char *s);
#ifdef __cplusplus
}
#endif
#endif
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