34 lines
1.4 KiB
Groff
34 lines
1.4 KiB
Groff
.TH STRTOL 3 "December 9, 2009"
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.UC 4
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.SH NAME
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strtol, strtoll, strtoul, strtoull \- convert string to number
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.SH SYNOPSIS
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.nf
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.ft B
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#include <stdlib.h>
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long strtol(const char *\fInptr\fP, char **\fIendptr\fP, int \fIbase\fP);
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unsigned long strtoul(const char *\fInptr\fP, char **\fIendptr\fP, int \fIbase\fP);
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#ifdef __LONG_LONG_SUPPORTED
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long long strtoll(const char *\fInptr\fP, char **\fIendptr\fP, int \fIbase\fP);
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unsigned long long strtoull(const char *\fInptr\fP, char **\fIendptr\fP, int \fIbase\fP);
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#endif
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.fi
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.SH DESCRIPTION
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These functions parse as much from the string \fInptr\fP as possible and return
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it as an integer. The string should consist of any number of whitespace
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characters followed by a sign (either plus or minus) and at least one digit in
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the specified \fIbase\fP. The digits of a hexadecimal string may be preceded by
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the prefix 0x or 0X, which is ignored. If \fIbase\fP is zero, hexadecimal is
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assumed if this prefix is present, octal is assumed if there is a leading zero
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and decimal is assumed otherwise. If not zero, \fIbase\fP must be at least 2
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and at most 36. A pointer to the first character following the numeric string is
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stored in *\fIendptr\fP.
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.PP
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Note that the strtoll and strtoull functions, which return 64-bit values,
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are supported only on GCC as ACK does not support 64-bit arithmatic.
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.SH "RETURN VALUE
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The parsed number is returned.
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.SH "SEE ALSO"
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.BR atoi (3).
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