1a64l(3C)                 Standard C Library Functions                 a64l(3C)
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NAME

6       a64l, l64a - convert between long integer and base-64 ASCII string
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SYNOPSIS

9       #include <stdlib.h>
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11       long a64l(const char *s);
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14       char *l64a(long l);
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DESCRIPTION

18       These  functions  maintain  numbers  stored in base-64 ASCII characters
19       that define a notation by which long integers can be represented by  up
20       to  six  characters.  Each character represents a "digit" in a radix-64
21       notation.
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24       The characters used to represent "digits" are as follows:
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29       ┌─────────────────────────────┬─────────────────────────────┐
30       │Character                    │ Digit                       │
31       ├─────────────────────────────┼─────────────────────────────┤
32       │.                            │ 0                           │
33       │/                            │ 1                           │
34       │0-9                          │ 2-11                        │
35       │A-Z                          │ 12-37                       │
36       │a-z                          │ 38-63                       │
37       └─────────────────────────────┴─────────────────────────────┘
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40       The a64l() function takes a pointer to a null-terminated base-64 repre‐
41       sentation  and  returns  a  corresponding  long  value.   If the string
42       pointed to by s contains more than  six  characters,  a64l()  uses  the
43       first six.
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46       The  a64l() function scans the character string from left to right with
47       the least significant digit on the left, decoding each character  as  a
48       6-bit radix-64 number.
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51       The  l64a() function takes a long argument and returns a pointer to the
52       corresponding base-64 representation. If  the  argument  is  0,  l64a()
53       returns a pointer to a null string.
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56       The  value  returned  by  l64a() is a pointer into a static buffer, the
57       contents of which are overwritten by each call.  In the case of  multi‐
58       threaded applications, the return value is a pointer to thread specific
59       data.
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ATTRIBUTES

62       See attributes(5) for descriptions of the following attributes:
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67       ┌─────────────────────────────┬─────────────────────────────┐
68       │      ATTRIBUTE TYPE         │      ATTRIBUTE VALUE        │
69       ├─────────────────────────────┼─────────────────────────────┤
70       │Interface Stability          │Standard                     │
71       ├─────────────────────────────┼─────────────────────────────┤
72       │MT-Level                     │MT-Safe                      │
73       └─────────────────────────────┴─────────────────────────────┘
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SEE ALSO

76       attributes(5), standards(5)
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80SunOS 5.11                        24 Jul 2002                         a64l(3C)
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