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The C and C++ Include Header Files

/usr/include/python3.12/internal/pycore_dtoa.h


$ cat -n /usr/include/python3.12/internal/pycore_dtoa.h

     1	#ifndef Py_INTERNAL_DTOA_H
     2	#define Py_INTERNAL_DTOA_H
     3	#ifdef __cplusplus
     4	extern "C" {
     5	#endif
     6	
     7	#ifndef Py_BUILD_CORE
     8	#  error "this header requires Py_BUILD_CORE define"
     9	#endif
    10	
    11	#include "pycore_pymath.h"        // _PY_SHORT_FLOAT_REPR
    12	
    13	
    14	#if _PY_SHORT_FLOAT_REPR == 1
    15	
    16	typedef uint32_t ULong;
    17	
    18	struct
    19	Bigint {
    20	    struct Bigint *next;
    21	    int k, maxwds, sign, wds;
    22	    ULong x[1];
    23	};
    24	
    25	#ifdef Py_USING_MEMORY_DEBUGGER
    26	
    27	struct _dtoa_state {
    28	    int _not_used;
    29	};
    30	#define _dtoa_interp_state_INIT(INTERP) \
    31	    {0}
    32	
    33	#else  // !Py_USING_MEMORY_DEBUGGER
    34	
    35	/* The size of the Bigint freelist */
    36	#define Bigint_Kmax 7
    37	
    38	#ifndef PRIVATE_MEM
    39	#define PRIVATE_MEM 2304
    40	#endif
    41	#define Bigint_PREALLOC_SIZE \
    42	    ((PRIVATE_MEM+sizeof(double)-1)/sizeof(double))
    43	
    44	struct _dtoa_state {
    45	    /* p5s is a linked list of powers of 5 of the form 5**(2**i), i >= 2 */
    46	    // XXX This should be freed during runtime fini.
    47	    struct Bigint *p5s;
    48	    struct Bigint *freelist[Bigint_Kmax+1];
    49	    double preallocated[Bigint_PREALLOC_SIZE];
    50	    double *preallocated_next;
    51	};
    52	#define _dtoa_state_INIT(INTERP) \
    53	    { \
    54	        .preallocated_next = (INTERP)->dtoa.preallocated, \
    55	    }
    56	
    57	#endif  // !Py_USING_MEMORY_DEBUGGER
    58	
    59	
    60	/* These functions are used by modules compiled as C extension like math:
    61	   they must be exported. */
    62	
    63	PyAPI_FUNC(double) _Py_dg_strtod(const char *str, char **ptr);
    64	PyAPI_FUNC(char *) _Py_dg_dtoa(double d, int mode, int ndigits,
    65	                        int *decpt, int *sign, char **rve);
    66	PyAPI_FUNC(void) _Py_dg_freedtoa(char *s);
    67	
    68	#endif // _PY_SHORT_FLOAT_REPR == 1
    69	
    70	#ifdef __cplusplus
    71	}
    72	#endif
    73	#endif /* !Py_INTERNAL_DTOA_H */