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25 .\" Portions of this text are reprinted and reproduced in electronic form
26 .\" from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology --
27 .\" Portable Operating System Interface (POSIX), The Open Group Base
28 .\" Specifications Issue 6, Copyright (C) 2001-2004 by the Institute of
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44 .Nd "convert between a long integer and a base-64 ASCII string"
50 .Fn a64l "const char *s"
54 .Fn l64a_r "long int l" "char *buffer" "int buflen"
56 These functions are used to maintain numbers stored in radix-64
59 This is a notation by which 32-bit integers can be represented by
60 up to six characters; each character represents a digit in
62 If the type long contains more than 32 bits, only the low-order
63 32 bits are used for these operations.
65 The characters used to represent
93 function takes a pointer to a radix-64 representation, in which the first
94 digit is the least significant, and returns a corresponding
97 If the string pointed to by
99 contains more than six characters,
102 If the first six characters of the string contain a null terminator,
104 uses only characters preceding the null terminator.
107 function scans the character string from left to right with the least
108 significant digit on the left, decoding each character as a 6-bit
110 If the type long contains more than 32 bits, the resulting value is
116 is a null pointer or the string pointed to by
118 was not generated by a previous call to
123 function takes a long argument and returns a pointer to the corresponding
124 radix-64 representation.
127 is unspecified if value is negative.
129 The value returned by
131 is a pointer into a static buffer.
134 may overwrite the buffer.
138 function performs a conversion identical to that of
140 and stores the resulting representation in the memory area pointed to by
144 characters including the terminating NUL character.
146 On successful completion,
150 value resulting from conversion of the input string.
151 If a string pointed to by s is an empty string,
157 function returns a pointer to the radix-64 representation.
160 returns a pointer to an empty string.
169 functions are derived from
183 .An Tom Rhodes Aq trhodes@FreeBSD.org .
184 Almost all of this manual page came from the