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nimgrep: first working version

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This commit is contained in:
Araq 2011-02-02 00:05:55 +01:00
commit 437eb2c37e
7 changed files with 174 additions and 46 deletions
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18
lib/impure/re.nim
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@ -80,6 +80,24 @@ proc matchOrFind(s: string, pattern: TRegEx, matches: var openarray[string],
if a >= 0'i32: matches[i-1] = copy(s, int(a), int(b)-1)
else: matches[i-1] = ""
return rawMatches[1] - rawMatches[0]
proc findBounds*(s: string, pattern: TRegEx, matches: var openarray[string],
start = 0): tuple[first, last: int] =
## returns the starting position and end position of ``pattern`` in ``s``
## and the captured
## substrings in the array ``matches``. If it does not match, nothing
## is written into ``matches`` and (-1,0) is returned.
var
rawMatches: array[0..maxSubpatterns * 3 - 1, cint]
res = pcre.Exec(pattern.h, nil, s, len(s), start, 0'i32,
cast[ptr cint](addr(rawMatches)), maxSubpatterns * 3)
if res < 0'i32: return (-1, 0)
for i in 1..int(res)-1:
var a = rawMatches[i * 2]
var b = rawMatches[i * 2 + 1]
if a >= 0'i32: matches[i-1] = copy(s, int(a), int(b)-1)
else: matches[i-1] = ""
return (rawMatches[0].int, rawMatches[1].int - 1)
proc matchOrFind(s: string, pattern: TRegEx, start, flags: cint): cint =
var rawMatches: array [0..maxSubpatterns * 3 - 1, cint]