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micro-optimizations to string-trim-both, and to (web http)
* libguile/srfi-13.c (scm_string_trim, scm_string_trim_right) (scm_string_trim_both): Take the whitespace fast-path if the char_pred is scm_char_set_whitespace. * module/web/http.scm (read-header, split-and-trim, parse-quality-list): (parse-param-component, parse-credentials, "Content-Type"): (read-request-line, read-response-line): Use char-set:whitespace instead of char-whitespace?. It avoids recursing into the VM.
This commit is contained in:
Andy Wingo
parent
c05805a4ea
commit
47153f29b0
2 changed files with 27 additions and 28 deletions
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@ -1,6 +1,6 @@
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/* srfi-13.c --- SRFI-13 procedures for Guile
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*
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* Copyright (C) 2001, 2004, 2005, 2006, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
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* Copyright (C) 2001, 2004, 2005, 2006, 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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@ -719,7 +719,8 @@ SCM_DEFINE (scm_string_trim, "string-trim", 1, 3, 0,
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MY_VALIDATE_SUBSTRING_SPEC (1, s,
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3, start, cstart,
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4, end, cend);
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if (SCM_UNBNDP (char_pred))
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if (SCM_UNBNDP (char_pred)
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|| scm_is_eq (char_pred, scm_char_set_whitespace))
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{
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while (cstart < cend)
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{
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@ -794,7 +795,8 @@ SCM_DEFINE (scm_string_trim_right, "string-trim-right", 1, 3, 0,
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MY_VALIDATE_SUBSTRING_SPEC (1, s,
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3, start, cstart,
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4, end, cend);
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if (SCM_UNBNDP (char_pred))
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if (SCM_UNBNDP (char_pred)
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|| scm_is_eq (char_pred, scm_char_set_whitespace))
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{
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while (cstart < cend)
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{
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@ -869,7 +871,8 @@ SCM_DEFINE (scm_string_trim_both, "string-trim-both", 1, 3, 0,
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MY_VALIDATE_SUBSTRING_SPEC (1, s,
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3, start, cstart,
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4, end, cend);
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if (SCM_UNBNDP (char_pred))
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if (SCM_UNBNDP (char_pred)
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|| scm_is_eq (char_pred, scm_char_set_whitespace))
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{
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while (cstart < cend)
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{
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@ -185,7 +185,7 @@ body was reached (i.e., a blank line)."
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sym
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(read-continuation-line
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port
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(string-trim-both line char-whitespace? (1+ delim)))))))))
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(string-trim-both line char-set:whitespace (1+ delim)))))))))
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(define (parse-header sym val)
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"Parse @var{val}, a string, with the parser registered for the header
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@ -277,7 +277,7 @@ ordered alist."
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(let lp ((i start))
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(if (< i end)
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(let* ((idx (string-index str delim i end))
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(tok (string-trim-both str char-whitespace? i (or idx end))))
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(tok (string-trim-both str char-set:whitespace i (or idx end))))
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(cons tok (split-and-trim str delim (if idx (1+ idx) end) end)))
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'())))
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@ -420,13 +420,13 @@ ordered alist."
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(cond
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((string-rindex part #\;)
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=> (lambda (idx)
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(let ((qpart (string-trim-both part char-whitespace? (1+ idx))))
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(let ((qpart (string-trim-both part char-set:whitespace (1+ idx))))
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(if (string-prefix? "q=" qpart)
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(cons (parse-quality qpart 2)
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(string-trim-both part char-whitespace? 0 idx))
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(string-trim-both part char-set:whitespace 0 idx))
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(bad-header-component 'quality qpart)))))
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(else
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(cons 1000 (string-trim-both part char-whitespace?)))))
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(cons 1000 (string-trim-both part char-set:whitespace)))))
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(string-split str #\,)))
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(define (validate-quality-list l)
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@ -541,15 +541,15 @@ ordered alist."
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;; param-component = token [ "=" (token | quoted-string) ] \
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;; *(";" token [ "=" (token | quoted-string) ])
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;;
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(define param-delimiters (char-set #\, #\; #\=))
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(define param-value-delimiters (char-set-adjoin char-set:whitespace #\, #\;))
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(define* (parse-param-component str #:optional
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(val-parser default-val-parser)
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(start 0) (end (string-length str)))
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(let lp ((i start) (out '()))
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(if (not (< i end))
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(values (reverse! out) end)
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(let ((delim (string-index str
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(lambda (c) (memq c '(#\, #\; #\=)))
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i)))
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(let ((delim (string-index str param-delimiters i)))
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(let ((k (string->symbol
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(substring str i (trim-whitespace str i (or delim end)))))
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(delimc (and delim (string-ref str delim))))
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@ -561,12 +561,7 @@ ordered alist."
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(if (and (< i end) (eqv? (string-ref str i) #\"))
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(parse-qstring str i end #:incremental? #t)
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(let ((delim
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(or (string-index
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str
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(lambda (c)
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(or (eqv? c #\;)
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(eqv? c #\,)
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(char-whitespace? c)))
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(or (string-index str param-value-delimiters
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i end)
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end)))
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(values (substring str i delim)
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@ -853,7 +848,7 @@ ordered alist."
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(define* (parse-credentials str #:optional (val-parser default-val-parser)
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(start 0) (end (string-length str)))
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(let* ((start (skip-whitespace str start end))
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(delim (or (string-index str char-whitespace? start end) end)))
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(delim (or (string-index str char-set:whitespace start end) end)))
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(if (= start end)
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(bad-header-component 'authorization str))
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(let ((scheme (string->symbol
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@ -1038,8 +1033,8 @@ not have to have a scheme or host name. The result is a URI object."
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"Read the first line of an HTTP request from @var{port}, returning
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three values: the method, the URI, and the version."
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(let* ((line (read-line* port))
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(d0 (string-index line char-whitespace?)) ; "delimiter zero"
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(d1 (string-rindex line char-whitespace?)))
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(d0 (string-index line char-set:whitespace)) ; "delimiter zero"
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(d1 (string-rindex line char-set:whitespace)))
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(if (and d0 d1 (< d0 d1))
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(values (parse-http-method line 0 d0)
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(parse-request-uri line (skip-whitespace line (1+ d0) d1) d1)
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@ -1100,14 +1095,14 @@ three values: the method, the URI, and the version."
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three values: the HTTP version, the response code, and the \"reason
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phrase\"."
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(let* ((line (read-line* port))
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(d0 (string-index line char-whitespace?)) ; "delimiter zero"
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(d1 (and d0 (string-index line char-whitespace?
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(d0 (string-index line char-set:whitespace)) ; "delimiter zero"
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(d1 (and d0 (string-index line char-set:whitespace
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(skip-whitespace line d0)))))
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(if (and d0 d1)
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(values (parse-http-version line 0 d0)
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(parse-non-negative-integer line (skip-whitespace line d0 d1)
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d1)
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(string-trim-both line char-whitespace? d1))
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(string-trim-both line char-set:whitespace d1))
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(bad-response "Bad Response-Line: ~s" line))))
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(define (write-response-line version code reason-phrase port)
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@ -1488,9 +1483,10 @@ phrase\"."
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(map (lambda (x)
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(let ((eq (string-index x #\=)))
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(if (and eq (= eq (string-rindex x #\=)))
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(cons (string->symbol
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(string-trim x char-whitespace? 0 eq))
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(string-trim-right x char-whitespace? (1+ eq)))
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(cons
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(string->symbol
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(string-trim x char-set:whitespace 0 eq))
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(string-trim-right x char-set:whitespace (1+ eq)))
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(bad-header 'content-type str))))
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(cdr parts)))))
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(lambda (val)
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