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Diffstat (limited to 'newlib/libc/stdlib/a64l.c')
| -rw-r--r-- | newlib/libc/stdlib/a64l.c | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/newlib/libc/stdlib/a64l.c b/newlib/libc/stdlib/a64l.c deleted file mode 100644 index 9a56a9141..000000000 --- a/newlib/libc/stdlib/a64l.c +++ /dev/null @@ -1,192 +0,0 @@ -/* -FUNCTION -<<a64l>>,<<l64a>>---convert between radix-64 ascii string and long - -INDEX - a64l -INDEX - l64a - -ANSI_SYNOPSIS - #include <stdlib.h> - long a64l(const char *<[input]>); - char *l64a(long <[input]>); - -TRAD_SYNOPSIS - #include <stdlib.h> - long a64l(<[input]>) - const char *<[input]>; - - char *l64a(<[input]>) - long <[input]>; - -DESCRIPTION -Conversion is performed between long and radix-64 characters. The <<l64a>> routine -transforms up to 32-bits of input value starting from least significant bits to -the most significant bits. The input value is split up into a maximum of 5 -groups of 6-bits and possibly one group of 2 bits (bits 31 and 30). - -Each group of 6 bits forms a value from 0-63 which is translated into a character -as follows: - - 0 = '.' - 1 = '/' - 2-11 = '0' to '9' - 12-37 = 'A' to 'Z' - 38-63 = 'a' to 'z' - -When remaining bits are zero or all bits have been translated, a nul terminator -is appended to the string. An input value of 0 results in the empty string. - -The <<a64l>> performs the reverse translation. Each character is used to generate -a 6-bit value for up to 30 bits and then a 2-bit value to complete a 32-bit result. -The nul terminator means that the remaining digits are 0. An empty input string or -NULL string results in 0L. An invalid string results in undefined behavior. -If the size of a long is > 32 bits, the result is sign-extended. - -RETURNS -<<l64a>> returns a nul-terminated string of 0 to 6 characters. -<<a64l>> returns the 32-bit translated value from the input character string. - -PORTABILITY -<<l64a>> and <<a64l>> are non-ANSI and are defined by the Single Unix Specification. - -Supporting OS subroutines required: None. -*/ - -#include <_ansi.h> -#include <stdlib.h> -#include <limits.h> - -long -_DEFUN (a64l, (input), - const char *input) -{ - char *ptr; - char ch; - int i, digit; - unsigned long result = 0; - - if (input == NULL) - return 0; - - ptr = input; - - /* it easiest to go from most significant digit to least so find end of input or up - to 6 characters worth */ - for (i = 0; i < 6; ++i) - { - if (*ptr) - ++ptr; - } - - while (ptr > input) - { - ch = *(--ptr); - -#if defined(PREFER_SIZE_OVER_SPEED) || defined(__OPTIMIZE_SIZE__) - if (ch >= 'a') - digit = (ch - 'a') + 38; - else if (ch >= 'A') - digit = (ch - 'A') + 12; - else if (ch >= '0') - digit = (ch - '0') + 2; - else if (ch == '/') - digit = 1; - else - digit = 0; -#else /* !defined(PREFER_SIZE_OVER_SPEED) && !defined(__OPTIMIZE_SIZE__) */ - switch (ch) - { - case '/': - digit = 1; - break; - case '0': - case '1': - case '2': - case '3': - case '4': - case '5': - case '6': - case '7': - case '8': - case '9': - digit = (ch - '0') + 2; - break; - case 'A': - case 'B': - case 'C': - case 'D': - case 'E': - case 'F': - case 'G': - case 'H': - case 'I': - case 'J': - case 'K': - case 'L': - case 'M': - case 'N': - case 'O': - case 'P': - case 'Q': - case 'R': - case 'S': - case 'T': - case 'U': - case 'V': - case 'W': - case 'X': - case 'Y': - case 'Z': - digit = (ch - 'A') + 12; - break; - case 'a': - case 'b': - case 'c': - case 'd': - case 'e': - case 'f': - case 'g': - case 'h': - case 'i': - case 'j': - case 'k': - case 'l': - case 'm': - case 'n': - case 'o': - case 'p': - case 'q': - case 'r': - case 's': - case 't': - case 'u': - case 'v': - case 'w': - case 'x': - case 'y': - case 'z': - digit = (ch - 'A') + 38; - break; - default: - digit = 0; - break; - } -#endif /* !defined(PREFER_SIZE_OVER_SPEED) && !defined(__OPTIMIZE_SIZE__) */ - - result = (result << 6) + digit; - } - -#if LONG_MAX > 2147483647 - /* for implementations where long is > 32 bits, the result must be sign-extended */ - if (result & 0x80000000) - return (((long)-1 >> 32) << 32) + result; -#endif - - return result; -} - - - - |