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Improve performance of readLine by using fgets

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This drops compatibility with pure CR line endings of old Mac systems
This commit is contained in:
def 2015-07-24 00:29:09 +02:00
commit 3943fba34b
2 changed files with 29 additions and 60 deletions
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12
lib/system.nim
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@ -2603,17 +2603,17 @@ when not defined(JS): #and not defined(NimrodVM):
proc readLine*(f: File): TaintedString {.tags: [ReadIOEffect], benign.}
## reads a line of text from the file `f`. May throw an IO exception.
## A line of text may be delimited by ``CR``, ``LF`` or
## ``CRLF``. The newline character(s) are not part of the returned string.
## A line of text may be delimited by ``LF`` or ``CRLF``. The newline
## character(s) are not part of the returned string.
proc readLine*(f: File, line: var TaintedString): bool {.tags: [ReadIOEffect],
benign.}
## reads a line of text from the file `f` into `line`. `line` must not be
## ``nil``! May throw an IO exception.
## A line of text may be delimited by ``CR``, ``LF`` or
## ``CRLF``. The newline character(s) are not part of the returned string.
## Returns ``false`` if the end of the file has been reached, ``true``
## otherwise. If ``false`` is returned `line` contains no new data.
## A line of text may be delimited by ``LF`` or ``CRLF``. The newline
## character(s) are not part of the returned string. Returns ``false``
## if the end of the file has been reached, ``true`` otherwise. If
## ``false`` is returned `line` contains no new data.
proc writeLn*[Ty](f: File, x: varargs[Ty, `$`]) {.inline,
tags: [WriteIOEffect], benign, deprecated.}