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Add a more number parsers to the scanf macro (#6985)

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Dmitry Atamanov 2018-01-05 19:36:56 +03:00 • committed by Andreas Rumpf
commit 6ca563dd2e
2 changed files with 48 additions and 2 deletions
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17
lib/pure/parseutils.nim
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@ -87,6 +87,23 @@ proc parseOct*(s: string, number: var int, start = 0): int {.
inc(i)
if foundDigit: result = i-start
proc parseBin*(s: string, number: var int, start = 0): int {.
rtl, extern: "npuParseBin", noSideEffect.} =
## parses an binary number and stores its value in ``number``. Returns
## the number of the parsed characters or 0 in case of an error.
var i = start
var foundDigit = false
if s[i] == '0' and (s[i+1] == 'b' or s[i+1] == 'B'): inc(i, 2)
while true:
case s[i]
of '_': discard
of '0'..'1':
number = number shl 1 or (ord(s[i]) - ord('0'))
foundDigit = true
else: break
inc(i)
if foundDigit: result = i-start
proc parseIdent*(s: string, ident: var string, start = 0): int =
## parses an identifier and stores it in ``ident``. Returns
## the number of the parsed characters or 0 in case of an error.