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EWF/contrib/ise_library/math/eapml/facilities/integer_x_access.e
2012-06-15 14:24:23 +02:00

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note
description: "Summary description for {INTEGER_X_ACCESS}."
author: "Colin LeMahieu"
date: "$Date$"
revision: "$Revision$"
quote: "It is error alone which needs the support of government. Truth can stand by itself. - Thomas Jefferson (1743-1846), U.S. President, Notes on the State of Virginia, 1782"
deferred class
INTEGER_X_ACCESS
inherit
INTEGER_X_FACILITIES
SPECIAL_SIZING
SPECIAL_ACCESS
rename
get_str as get_str_special
end
feature
get_string (op: READABLE_INTEGER_X; base: INTEGER): STRING_8
require
base >= 2
base <= 62
local
xp: SPECIAL [NATURAL_32]
xp_offset: INTEGER
x_size: INTEGER
str: STRING_8
str_offset: INTEGER
return_str: STRING_8
return_str_offset: INTEGER
str_size: INTEGER
alloc_size: INTEGER
num_to_text: CHARACTER_STRATEGY
i: INTEGER
do
x_size := op.count
if base <= 35 then
create {CASE_INSENSITIVE_STRATEGY}num_to_text
else
create {CASE_SENSITIVE_STRATEGY}num_to_text
end
alloc_size := sizeinbase (op.item, 0, x_size.abs, base)
alloc_size := alloc_size + (x_size < 0).to_integer
create Result.make_filled ('%U', alloc_size)
return_str := Result
return_str_offset := 1
if x_size < 0 then
return_str [return_str_offset] := '-'
return_str_offset := return_str_offset + 1
x_size := -x_size
end
xp := op.item
xp_offset := 0
if not pow2_p (base.to_natural_32) then
create xp.make_filled (0, x_size + 1)
xp.copy_data (op.item, 0, 0, x_size)
end
str_size := get_str_special (return_str, return_str_offset, base, xp, xp_offset, x_size)
str := return_str
str.remove_tail (alloc_size - str_size - (return_str_offset - 1))
str_offset := return_str_offset
if str [str_offset] = (0x0).to_character_8 and str_size /= 1 then
str_size := str_size - 1
str_offset := str_offset + 1
end
from
i := 0
until
i >= str_size
loop
return_str [return_str_offset + i] := num_to_text.number_to_text (str [str_offset + i].code.to_natural_8).to_character_8
i := i + 1
end
end
end