version 1.5, 2006/12/28 20:53:04
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version 1.7, 2007/02/10 15:30:15
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Line 21
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\ What this implementation does is this: if it sees a declaration like |
\ What this implementation does is this: if it sees a declaration like |
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\ \ something that tells it to include <unistd.h> |
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\ \ something that tells it that the current library is libc |
\ \ something that tells it that the current library is libc |
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\ \c #include <unistd.h> |
\ c-function dlseek lseek n d n -- d |
\ c-function dlseek lseek n d n -- d |
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\ it genererates C code similar to the following: |
\ it genererates C code similar to the following: |
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\ the function pointer of gforth_c_lseek_ndn_d on the stack and |
\ the function pointer of gforth_c_lseek_ndn_d on the stack and |
\ calls CALL-C. |
\ calls CALL-C. |
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\ ToDo: |
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\ Batching, caching and lazy evaluation: |
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\ Batching: |
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\ New words are deferred, and the corresponding C functions are |
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\ collected in one file, until the first word is EXECUTEd; then the |
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\ file is compiled and linked into the system, and the word is |
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\ resolved. |
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\ Caching: |
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\ Instead of compiling all this stuff anew for every execution, we |
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\ keep the files around and have an index file containing the function |
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\ names and their corresponding .so files. If the needed wrapper name |
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\ is already present, it is just linked instead of generating the |
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\ wrapper again. This is all done by loading the index file(s?), |
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\ which define words for the wrappers in a separate wordlist. |
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\ The files are built in .../lib/gforth/$VERSION/libcc/ or |
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\ ~/.gforth/libcc/$HOST/. |
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\ other things to do: |
\ other things to do: |
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\ c-variable forth-name c-name |
\ c-variable forth-name c-name |
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: const+ ( n1 "name" -- n2 ) |
: const+ ( n1 "name" -- n2 ) |
dup constant 1+ ; |
dup constant 1+ ; |
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\ dlerror |
\ linked list stuff (should go elsewhere) |
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hex |
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require struct.fs |
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struct |
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cell% field list-next |
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1 0 field list-payload |
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end-struct list% |
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: list-insert { node list -- } |
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list list-next @ node list-next ! |
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node list list-next ! ; |
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\ require lib.fs |
: list-append { node endlistp -- } |
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\ insert node at place pointed to by endlistp |
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node endlistp @ list-insert |
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node list-next endlistp ! ; |
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\ library libc libc.so.6 |
: list-map ( ... list xt -- ... ) |
\ libc sleep int (int) sleep |
\ xt ( ... node -- ... ) |
\ libc dlerror (ptr) dlerror |
{ xt } begin { node } |
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node while |
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node xt execute |
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node list-next @ |
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repeat ; |
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\ C prefix lines |
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\ linked list of longcstrings: [ link | count-cell | characters ] |
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list% |
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cell% field c-prefix-count |
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1 0 field c-prefix-chars |
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end-struct c-prefix% |
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variable c-prefix-lines 0 c-prefix-lines ! |
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variable c-prefix-lines-end c-prefix-lines c-prefix-lines-end ! |
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: save-c-prefix-line ( c-addr u -- ) |
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align here 0 , c-prefix-lines-end list-append ( c-addr u ) |
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longstring, ; |
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: \c ( "rest-of-line" -- ) |
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-1 parse save-c-prefix-line ; |
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: print-c-prefix-line ( node -- ) |
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dup c-prefix-chars swap c-prefix-count @ type cr ; |
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: print-c-prefix-lines ( -- ) |
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c-prefix-lines @ ['] print-c-prefix-line list-map ; |
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\c #include "engine/libcc.h" |
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print-c-prefix-lines |
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\ Types (for parsing) |
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wordlist constant libcc-types |
wordlist constant libcc-types |
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Line 218 create gen-wrapped-types
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Line 291 create gen-wrapped-types
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: gen-wrapper-function ( addr -- ) |
: gen-wrapper-function ( addr -- ) |
\ addr points to the return type index of a c-function descriptor |
\ addr points to the return type index of a c-function descriptor |
c@+ { ret } count 2dup { d: pars } chars + count { d: c-name } |
c@+ { ret } count 2dup { d: pars } chars + count { d: c-name } |
.\" #include \"engine/libcc.h\"\n" |
print-c-prefix-lines |
." void gforth_c_" c-name type ." _" |
." void gforth_c_" c-name type ." _" |
pars bounds u+do |
pars bounds u+do |
i c@ type-letter emit |
i c@ type-letter emit |
Line 295 s" Library not found" exception constant
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Line 368 s" Library not found" exception constant
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\ c-function func test5 -- func |
\ c-function func test5 -- func |
\ c-function void test6 -- void |
\ c-function void test6 -- void |
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\c #include <string.h> |
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c-function strlen strlen a -- n |
c-function strlen strlen a -- n |
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cr s\" fooo\0" 2dup dump drop .s strlen cr .s cr |
cr s\" fooo\0" 2dup dump drop .s strlen cr .s cr |