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jm_nstr.spin2
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'' =================================================================================================
''
'' File....... jm_nstr.spin2
'' Purpose.... Convert numbers to strings
'' Authors.... Jon McPhalen
'' -- Copyright (c) 2020-2022 Jon McPhalen
'' -- see below for terms of use
'' E-mail..... jon.mcphalen@gmail.com
'' Started....
'' Updated.... 04 JAN 2022
''
'' =================================================================================================
con
NBUF_SIZE = 48
PBUF_SIZE = 128
var
byte nbuf[NBUF_SIZE] ' number conversions
byte pbuf[PBUF_SIZE] ' padded strings
pub null()
'' This is not a top level object
pub fmt_number(value, radix, digits, width, pad) : p_str ' *** changed 23 JUN 2021 ***
'' Return pointer to string of value converted to number in padded field
'' -- value is converted using radix
'' -- radix is chararacter indicating type ' *** used to be number ***
'' -- digits is max number of digits to use
'' -- width is width of final fields (max)
'' -- pad is character used to pad final field (if needed)
case radix
"d", "D", 10 : p_str := padstr(dec(value, digits), width, pad)
"u", "U", 11 : p_str := padstr(usdec(value, digits), width, pad)
"f", "F", 12 : p_str := padstr(dpdec(value, digits), width, pad)
"b", "B", 02 : p_str := padstr(itoa(value, 2, digits), width, pad)
"q", "Q", 04 : p_str := padstr(itoa(value, 4, digits), width, pad)
"o", "O", 08 : p_str := padstr(itoa(value, 8, digits), width, pad)
"x", "X", 16 : p_str := padstr(itoa(value, 16, digits), width, pad)
other : p_str := string("?")
pub dec(value, digits) : p_str
'' Convert decimal value to string
'' -- digits is 0 (auto size) to 10
p_str := itoa(value, 10, digits)
pub usdec(value, digits) : p_str | len
'' Convert unsigned decimal value to string
'' -- digits is 0 (auto size) to 10
digits := 0 #> digits <# 10 ' limit printable digits
bytefill(@nbuf, 0, NBUF_SIZE) ' clear buffer
p_str := @nbuf + 9 ' point to end of udec string
len := 0
repeat
byte[--p_str] := (value +// 10) + "0" ' extract digit, convert to ASCII
value +/= 10 ' remove digit from value
if (digits) ' length limited?
if (++len == digits) ' check size
quit
else
if (value == 0) ' done?
quit
pub dpdec(value, dp) : p_str | len, byte scratch[12]
'' Convert value to string with decimal point
'' -- dp is digits after decimal point
'' -- returns pointer to updated fp string
'' -- modifies original string
'' -- return pointer to converted string
p_str := itoa(value, 10, 0)
if (dp <= 0) ' abort if no decimal point
return p_str
len := strsize(p_str) ' digits
bytefill(@scratch, 0, 12) ' clear scratch buffer
if (value < 0) ' ignore "-" if present
++p_str
--len
if (len < (dp+1)) ' insert 0s?
bytemove(@scratch, p_str, len) ' move digits to scratch buffer
bytefill(p_str, "0", dp+2-len) ' pad string with 0s
bytemove(p_str+dp+2-len, @scratch, len+1) ' move digits back
byte[p_str+1] := "." ' insert dpoint
else
bytemove(@scratch, p_str+len-dp, dp) ' move decimal part to buffer
byte[p_str+len-dp] := "." ' insert dpoint
bytemove(p_str+len-dp+1, @scratch, dp+1) ' move decimal part back
if (value < 0) ' fix pointer for negative #s
--p_str
pub itoa(value, radix, digits) : p_str | sign, len, d
'' Convert signed integer to string
'' -- supports radix 10, 2, 4, 8, and 16
'' -- digits is 0 (auto size) to limit for long using radix
bytefill(@nbuf, 0, NBUF_SIZE) ' clear buffer
p_str := @nbuf ' point to it
case radix ' limit printable digits
02 : digits := 0 #> digits <# 32
04 : digits := 0 #> digits <# 16
08 : digits := 0 #> digits <# 11
10 : digits := 0 #> digits <# 10
16 : digits := 0 #> digits <# 8
other :
return
if ((radix == 10) && (value < 0)) ' deal with negative decimals
if (value == negx)
sign := 2
value := posx
else
sign := 1
value := -value
else
sign := 0
len := 0
repeat
d := value +// radix ' get digit (1s column)
byte[p_str++] := (d < 10) ? d + "0" : d - 10 + "A" ' convert to ASCII
value +/= radix ' remove digit
if (digits) ' length limited?
if (++len == digits) ' check size
quit
else
if (value == 0) ' done?
quit
if (sign)
byte[p_str++] := "-" ' add sign if needed
if (sign == 2)
nbuf[0] := "8" ' fix negx if needed
byte[p_str++] := 0 ' terminate string
return revstr(@nbuf) ' fix order (reverse)
pub revstr(p_str) : result | first, len, last
'' Reverse the order of characters in a string.
result := first := p_str ' start
len := strsize(p_str) ' length
last := first + len - 1 ' end
repeat (len >> 1) ' reverse them
byte[first++], byte[last--] := byte[last], byte[first]
pub padstr(p_str, width, padchar) : p_pad | len
'' Pad string with padchar character
'' -- positive width uses left pad, negative field width uses right pad
'' -- truncate if string len > width
'' -- input string is not modified
'' -- returns pointer to padded string
bytefill(@pbuf, 0, PBUF_SIZE) ' clear padded buffer
len := strsize(p_str) ' get length of input
width := -PBUF_SIZE+1 #> width <# PBUF_SIZE-1 ' constrain to buffer size
if (width > 0) ' right-justify in padded field
if (width > len)
bytefill(@pbuf, padchar, width-len)
bytemove(@pbuf+width-len, p_str, len)
p_pad := @pbuf
else
bytemove(@pbuf, p_str+len-width, width) ' truncate to right-most characters
p_pad := @pbuf
elseif (width < 0) ' left-justify in padded field
width := -width
if (width > len)
bytemove(@pbuf, p_str, len)
bytefill(@pbuf+len, padchar, width-len)
p_pad := @pbuf
else
bytemove(@pbuf, p_str, width) ' truncate to leftmost characters
p_pad := @pbuf
else
p_pad := p_str
con { license }
{{
Terms of Use: MIT License
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
}}