Chicken egg that makes it more compatible with Scheme->C
Scheme C
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scheme2c-compatibility

This implements miscellaneous functions and macros that make Chicken more compatible with Scheme->C. Some of this comes from from Jeff Siskind's QobiScheme. Much of this functionality is redundant with that offered by other Chicken eggs but is offered with a Scheme->C-compatible API and naming scheme.

Lists

(eleventh x)
(twelfth x)

Strings

(lines string)
Combine a list of lines into a string separated by newlines.

(unlines l)
Split a string into a list of lines.

(words string)
Split a string into words.

(unwords l)
Combine a list of words into a string separated by spaces.

(number-of-fields string)
(field-ref string n)
(fields string)

System

(usleep microseconds)
(directory-list d)

File IO

(read-object-from-file pathname)
(write-object-to-file object pathname)
Read/write a single scheme object to/from a file. This is not the same as chicken's read-file.

(read-text-file pathname)
(write-text-file lines pathname)
Read/write a text file.

(fclose handle)
(fopen filename mode)
(fmemopen buffer size mode)
popen
pclose

Paths

(strip-directory pathname)
(has-extension? pathname)
(extension pathname)
(strip-extension pathname)
(default-extension pathname extension)
(replace-extension pathname extension)
(has-directory? pathname)
(get-directory pathname)

X11

(c-docolordither pic24 w h rdisp gdisp bdisp idisp maplen)
(ylookupstring event . opt)
(xallocnamedcolor3 dpy cmap colorname)
(xquerypointer2 dpy w)
getenv

Temporary files

*tmp*
(tmp pathname)
(with-temporary-file prefix f)
Call f with a unique filename that will be removed once f returns. The extension of prefix is honored, but not its base filename.

Bitwise operations

(bit-not n)
(bit-and n)
(bit-or n)
(bit-lsh n offset)
(bit-rsh n offset)

FFI compatibility

Sizeof
c-sizeof-short
c-sizeof-int
c-sizeof-long
c-sizeof-float
c-sizeof-double
c-sizeof-tscp
c-sizeof-s2cuint
c-sizeof-pointer
Memory accesss

(c-byte-ref ptr off)
(c-byte-set! ptr off val)
(c-double-ref ptr off)
(c-double-set! ptr off val)
(c-float-ref ptr off)
(c-float-set! ptr off val)
(c-int-ref ptr off)
(c-int-set! ptr off val)
(c-longint-ref ptr off)
(c-longint-set! ptr off val)
(c-longunsigned-ref ptr off)
(c-longunsigned-set! ptr off val)
(c-s2cuint-ref ptr off)
(c-s2cuint-set! ptr off val)
(c-shortint-ref ptr off)
(c-shortint-set! ptr off val)
(c-shortunsigned-ref ptr off)
(c-shortunsigned-set! ptr off val)
(c-unsigned-ref ptr off)
(c-unsigned-set! ptr off val)
(pointer-pointer-ref ptr-to-ptr)
(pointer-pointer-set! ptr-to-ptr val)
(c-string->string buf)
(c-null-separated-strings->strings c-strings)
Access buffers containg various standard types. s2cuint is the same size as a pointer.

Arrays

(c-array->list array get-element element-size nr-elements)
(c-array->vector array get-element element-size nr-elements)
(c-exact-array->list array element-size nr-elements signed?)
(c-exact-array->vector array element-size nr-elements signed?)
(c-inexact-array->list array element-size nr-elements signed?)
(c-inexact-array->vector array element-size nr-elements signed?)
(list->c-array array l set-element element-size)
(list->c-exact-array array l element-size signed?)
(list->c-inexact-array array l element-size signed?)
(vector->c-array array v set-element element-size)
(vector->c-exact-array array v element-size signed?)
(vector->c-inexact-array array v element-size signed?)
Various functions to convert to and from C arrays.

(c-sized-int-ptr-ref size signed?)
(c-sized-int-ptr-set! size signed?)
(c-sized-inexact-ptr-ref size signed?)
(c-sized-inexact-ptr-set! size signed?)
Return functions which access arrays with elements of given sizes.

Scroped

(with-alloc x f)
(with-buffer-stream f buffer size mode)
(with-c-string str f)
(with-file-stream f filename mode)
(with-array elements element-size f)
(with-c-pointers f v)
(with-vector->c-array f set-element element-size v)
Perform many of the operations above automatically cleaning up once the procedure returns.

misc

(exact-round x)
(exact-ceiling x)
(exact-floor x)
Round/floor/ceiling and inexact->exact.

c-value
c-sizeof
c-function
malloc
memcpy
bzero
(unsigned-list->unsigneda l)

misc

(fuck-up)
(panic format-string . &rest)
(xor a b)
*panic?*
*program*
(read-from-string string)
(read) from a string.

flush-buffer
flush-output

TODO

with-temporary-file is wrong! It ignores the prefix and more importantly its extension and will lead to breakage.

License

   Copyright 1993-1995 University of Toronto. All rights reserved.
   Copyright 1996 Technion. All rights reserved.
   Copyright 1996 and 1997 University of Vermont. All rights reserved.
   Copyright 1997-2001 NEC Research Institute, Inc. All rights reserved.
   Copyright 2002-2012 Purdue University. All rights reserved.

   Contact Andrei Barbu, andrei@0xab.com.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Lesser General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU Lesser General Public License for more details.
   You should have received a copy of the GNU Lesser General Public License
   along with this program.  If not, see http://www.gnu.org/licenses.