- grok_bin
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converts a string representing a binary number to numeric form.
On entry start and *len give the string to scan, *flags gives
conversion flags, and result should be NULL or a pointer to an NV. The scan stops
at the end of the string, or the first invalid character. On return *len is set to
the length scanned string, and *flags gives output flags.
If the value is <= UV_MAX it is returned as a UV, the output flags are clear, and
nothing is written to *result. If the value is > UV_MAX grok_bin
returns UV_MAX, sets PERL_SCAN_GREATER_THAN_UV_MAX in the output flags, and
writes the value to *result (or the value is discarded if result is NULL).
The hex number may optionally be prefixed with "0b" or "b" unless PERL_SCAN_DISALLOW_PREFIX
is set in *flags on entry. If PERL_SCAN_ALLOW_UNDERSCORES is set in *flags
then the binary number may use '_' characters to separate digits.
UV grok_bin(char* start, STRLEN* len, I32* flags, NV *result)
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- grok_hex
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converts a string representing a hex number to numeric form.
On entry start and *len give the string to scan, *flags gives
conversion flags, and result should be NULL or a pointer to an NV. The scan stops
at the end of the string, or the first non-hex-digit character. On return *len is
set to the length scanned string, and *flags gives output flags.
If the value is <= UV_MAX it is returned as a UV, the output flags are clear, and
nothing is written to *result. If the value is > UV_MAX grok_hex
returns UV_MAX, sets PERL_SCAN_GREATER_THAN_UV_MAX in the output flags, and
writes the value to *result (or the value is discarded if result is NULL).
The hex number may optionally be prefixed with "0x" or "x" unless PERL_SCAN_DISALLOW_PREFIX
is set in *flags on entry. If PERL_SCAN_ALLOW_UNDERSCORES is set in *flags
then the hex number may use '_' characters to separate digits.
UV grok_hex(char* start, STRLEN* len, I32* flags, NV *result)
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- grok_number
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Recognise (or not) a number. The type of the number is returned (0 if unrecognised),
otherwise it is a bit-ORed combination of IS_NUMBER_IN_UV, IS_NUMBER_GREATER_THAN_UV_MAX,
IS_NUMBER_NOT_INT, IS_NUMBER_NEG, IS_NUMBER_INFINITY, IS_NUMBER_NAN (defined in perl.h).
If the value of the number can fit an in UV, it is returned in the *valuep
IS_NUMBER_IN_UV will be set to indicate that *valuep is valid, IS_NUMBER_IN_UV will never
be set unless *valuep is valid, but *valuep may have been assigned to during processing
even though IS_NUMBER_IN_UV is not set on return. If valuep is NULL, IS_NUMBER_IN_UV will
be set for the same cases as when valuep is non-NULL, but no actual assignment (or SEGV)
will occur.
IS_NUMBER_NOT_INT will be set with IS_NUMBER_IN_UV if trailing decimals were seen (in
which case *valuep gives the true value truncated to an integer), and IS_NUMBER_NEG if the
number is negative (in which case *valuep holds the absolute value). IS_NUMBER_IN_UV is
not set if e notation was used or the number is larger than a UV.
int grok_number(const char *pv, STRLEN len, UV *valuep)
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- grok_numeric_radix
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Scan and skip for a numeric decimal separator (radix).
bool grok_numeric_radix(const char **sp, const char *send)
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- grok_oct
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UV grok_oct(char* start, STRLEN* len, I32* flags, NV *result)
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- scan_bin
-
For backwards compatibility. Use grok_bin instead.
NV scan_bin(char* start, STRLEN len, STRLEN* retlen)
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- scan_hex
-
For backwards compatibility. Use grok_hex instead.
NV scan_hex(char* start, STRLEN len, STRLEN* retlen)
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- scan_oct
-
For backwards compatibility. Use grok_oct instead.
NV scan_oct(char* start, STRLEN len, STRLEN* retlen)
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