numparse.h File Reference

Tiny no-stdlib base-10 number parsers (strtol/strtoul/strtof replacements). More...

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Functions
bool	det_np_ws (char c)
bool	det_np_digit (char c)
long	det_strtol (const char *s, const char **end)
	Parse a base-10 long; sets end past the digits (or to s if none).
unsigned long	det_strtoul (const char *s, const char **end)
	Parse a base-10 unsigned long; sets end past the digits (or to s).
void	det_strtod_frac (const char *&p, double &val, bool &any)
void	det_strtod_exp (const char *&p, double &val)
double	det_strtod (const char *s, const char **end)
	Parse a double (integer[.frac][e[+/-]exp]); sets end (or to s if none).
float	det_strtof (const char *s, const char **end)
	Parse a float (integer[.frac][e[+/-]exp]); sets end (or to s if none).

Detailed Description

Tiny no-stdlib base-10 number parsers (strtol/strtoul/strtof replacements).

This library does not pull in <stdlib.h> - no heap, no locale, no bloat. These header-only inline helpers parse a base-10 integer / unsigned / float from a string, mirroring the strtol-family endptr contract: skip leading whitespace, accept an optional sign, consume digits, and (optionally) report where parsing stopped. If no digit is converted, *end is set to the original pointer (so callers can detect "no number") and the result is 0.

Author

Douglas Quigg (dstroy0)

Date

2026

Definition in file numparse.h.

Function Documentation

det_np_ws()

bool det_np_ws ( char  c )

inline

Definition at line 22 of file numparse.h.

Referenced by det_strtod(), det_strtol(), and det_strtoul().

det_np_digit()

bool det_np_digit ( char  c )

inline

Definition at line 26 of file numparse.h.

Referenced by det_strtod(), det_strtod_exp(), det_strtod_frac(), det_strtol(), and det_strtoul().

det_strtol()

long det_strtol ( const char *  s, const char **  end  )

inline

Parse a base-10 long; sets end past the digits (or to s if none).

Definition at line 32 of file numparse.h.

References det_np_digit(), and det_np_ws().

Referenced by json_get_int().

det_strtoul()

unsigned long det_strtoul ( const char *  s, const char **  end  )

inline

Parse a base-10 unsigned long; sets end past the digits (or to s).

Definition at line 50 of file numparse.h.

References det_np_digit(), and det_np_ws().

det_strtod_frac()

void det_strtod_frac ( const char *&  p, double &  val, bool &  any  )

inline

Definition at line 67 of file numparse.h.

References det_np_digit().

Referenced by det_strtod().

det_strtod_exp()

void det_strtod_exp ( const char *&  p, double &  val  )

inline

Definition at line 80 of file numparse.h.

References det_np_digit().

Referenced by det_strtod().

det_strtod()

double det_strtod ( const char *  s, const char **  end  )

inline

Parse a double (integer[.frac][e[+/-]exp]); sets end (or to s if none).

Definition at line 99 of file numparse.h.

References det_np_digit(), det_np_ws(), det_strtod_exp(), and det_strtod_frac().

Referenced by det_strtof().

det_strtof()

float det_strtof ( const char *  s, const char **  end  )

inline

Parse a float (integer[.frac][e[+/-]exp]); sets end (or to s if none).

Definition at line 124 of file numparse.h.

References det_strtod().