unlocalized.h

Include dependency graph for unlocalized.h:

This graph shows which files directly or indirectly include unlocalized.h:

Locale-independent functions for floating-point numbers.

Provides formatting and parsing of floating-point numbers that always use ‘.’ as the decimal separator regardless of LC_NUMERIC. Thread-safe when snprintf_l()/strtod_l() or uselocale() is available. On pure C99 platforms, best-effort assuming no concurrent setlocale().

Defines

UNLOCALIZED_ENABLE_DOUBLE_API

Functions

int unlocalized_snprintf(char *buf, size_t size, const char *fmt, ...)

Locale-independent snprintf.

Behaves like snprintf but always uses ‘.’ as decimal separator regardless of LC_NUMERIC for floating-point conversions.

bool unlocalized_validate_bare_float_format(const char buf[], size_t len)

Validate strict bare decimal float format.

Checks that buf[0..len-1] matches the grammar: [+|-] DIGITS “.” DIGITS [(“e”|”E”) [+|-] DIGITS] where DIGITS is one or more ‘0’-‘9’ characters.

Rejects hex floats, inf, nan, whitespace, commas, and any other characters not in the grammar.

Parameters:

• buf – pointer to the character data (need not be null-terminated)

• len – number of characters to validate

Returns:

true if the format is valid, false otherwise

int unlocalized_strtod(const char buf[], size_t len, double *result)

Parse a double from a string locale-independently with strict validation.

Validates the input against the bare float format (see unlocalized_validate_bare_float_format), then parses with strtod using ‘.’ as decimal separator regardless of LC_NUMERIC. Rejects overflow (inf) but allows underflow (returns 0.0).

Parameters:

• buf – pointer to the character data (need not be null-terminated)

• len – number of characters to parse (max 255)

• result – [out] on success, the parsed double value

Returns:

0 on success, -1 on error (caller should raise badarg)

static inline int unlocalized_strto_avm_float(const char buf[], size_t len, avm_float_t *result)

Parse an avm_float_t from a string locale-independently.

Dispatches to unlocalized_strtod or unlocalized_strtof depending on AVM_USE_SINGLE_PRECISION.