New xolox#misc#path#starts_with() function

Author: xolox

README.md

@@ -37,8 +37,8 @@ from the source code of the miscellaneous scripts using the Python module
 
 <!-- Start of generated documentation -->
 
-The documentation of the 92 functions below was extracted from
-19 Vim scripts on June 30, 2014 at 02:47.
+The documentation of the 93 functions below was extracted from
+19 Vim scripts on July  6, 2014 at 18:28.
 
 ### Asynchronous Vim script evaluation
 
@@ -616,6 +616,13 @@ Join a directory pathname and filename into a single pathname.
 
 Find the common prefix of path components in a list of pathnames.
 
+#### The `xolox#misc#path#starts_with()` function
+
+Check whether the first pathname starts with the second pathname (expected
+to be a directory). This does not perform a regular string comparison;
+first it normalizes both pathnames, then it splits them into their
+pathname segments and then it compares the segments.
+
 #### The `xolox#misc#path#encode()` function
 
 Encode a pathname so it can be used as a filename. This uses URL encoding

autoload/xolox/misc.vim

@@ -1,7 +1,7 @@
 " The version of my miscellaneous scripts.
 "
 " Author: Peter Odding <peter@peterodding.com>
-" Last Change: June 30, 2014
+" Last Change: July 6, 2014
 " URL: http://peterodding.com/code/vim/misc/
 
-let g:xolox#misc#version = '1.13.1'
+let g:xolox#misc#version = '1.14'

autoload/xolox/misc/path.vim

@@ -1,7 +1,7 @@
 " Pathname manipulation functions.
 "
 " Author: Peter Odding <peter@peterodding.com>
-" Last Change: June 25, 2013
+" Last Change: July 6, 2014
 " URL: http://peterodding.com/code/vim/misc/
 
 let s:windows_compatible = xolox#misc#os#is_win()
@@ -154,7 +154,6 @@ function! xolox#misc#path#relative(path, base) " {{{1
   return xolox#misc#path#join(distance + path)
 endfunction
 
-
 function! xolox#misc#path#merge(parent, child, ...) " {{{1
   " Join a directory pathname and filename into a single pathname.
   if type(a:parent) == type('') && type(a:child) == type('')
@@ -190,6 +189,16 @@ function! xolox#misc#path#commonprefix(paths) " {{{1
   return xolox#misc#path#join(common)
 endfunction
 
+function! xolox#misc#path#starts_with(a, b) " {{{1
+  " Check whether the first pathname starts with the second pathname (expected
+  " to be a directory). This does not perform a regular string comparison;
+  " first it normalizes both pathnames, then it splits them into their
+  " pathname segments and then it compares the segments.
+  let a = xolox#misc#path#split(xolox#misc#path#absolute(a:a))
+  let b = xolox#misc#path#split(xolox#misc#path#absolute(a:b))
+  return a[0 : len(b) - 1] == b
+endfunction
+
 function! xolox#misc#path#encode(path) " {{{1
   " Encode a pathname so it can be used as a filename. This uses URL encoding
   " to encode special characters.
@@ -203,7 +212,6 @@ function! xolox#misc#path#encode(path) " {{{1
   return substitute(a:path, mask, '\=printf("%%%x", char2nr(submatch(0)))', 'g')
 endfunction
 
-
 function! xolox#misc#path#decode(encoded_path) " {{{1
   " Decode a pathname previously encoded with `xolox#misc#path#encode()`.
   return substitute(a:encoded_path, '%\(\x\x\?\)', '\=nr2char("0x" . submatch(1))', 'g')

doc/misc.txt

@@ -60,10 +60,11 @@ Contents ~
    6. The |xolox#misc#path#relative()| function
    7. The |xolox#misc#path#merge()| function
    8. The |xolox#misc#path#commonprefix()| function
-   9. The |xolox#misc#path#encode()| function
-   10. The |xolox#misc#path#decode()| function
-   11. The |xolox#misc#path#is_relative()| function
-   12. The |xolox#misc#path#tempdir()| function
+   9. The |xolox#misc#path#starts_with()| function
+   10. The |xolox#misc#path#encode()| function
+   11. The |xolox#misc#path#decode()| function
+   12. The |xolox#misc#path#is_relative()| function
+   13. The |xolox#misc#path#tempdir()| function
   13. Manipulation of UNIX file permissions |misc-manipulation-of-unix-file-permissions|
    1. The |xolox#misc#perm#update()| function
    2. The |xolox#misc#perm#get()| function
@@ -166,8 +167,8 @@ For those who are curious: The function descriptions given below were extracted
 from the source code of the miscellaneous scripts using the Python module
 'vimdoctool.py' included in vim-tools [5].
 
-The documentation of the 92 functions below was extracted from 19 Vim scripts
-on June 30, 2014 at 02:47.
+The documentation of the 93 functions below was extracted from 19 Vim scripts
+on July 6, 2014 at 18:28.
 
 -------------------------------------------------------------------------------
                                       *misc-asynchronous-vim-script-evaluation*
@@ -753,6 +754,14 @@ The *xolox#misc#path#commonprefix()* function
 
 Find the common prefix of path components in a list of pathnames.
 
+-------------------------------------------------------------------------------
+The *xolox#misc#path#starts_with()* function
+
+Check whether the first pathname starts with the second pathname (expected to
+be a directory). This does not perform a regular string comparison; first it
+normalizes both pathnames, then it splits them into their pathname segments and
+then it compares the segments.
+
 -------------------------------------------------------------------------------
 The *xolox#misc#path#encode()* function