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This commit is contained in:
Koichi Nakamura 2021-01-05 07:25:08 +09:00
parent b2c60e43f2
commit de3584b1d5
1 changed files with 13 additions and 0 deletions
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13
bootstrap.fs
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@ -1352,6 +1352,8 @@ decimal
-71 s" READ-LINE" def-error READ-LINE-ERROR
-75 s" WRITE-FILE" def-error WRITE-FILE-ERROR
-1 constant EOF
\ file access methods (fam)
0x00 constant R/O \ read-only
0x01 constant R/W \ read-write
@ -1371,6 +1373,7 @@ end-struct file%
: writable? ( file -- f ) file>fam c@ R/O <> ;
: readable? ( file -- f ) file>fam c@ W/O <> ;
\ Write bytes from buffer c-addr u1 to file, return error-code.
: write-file ( c-addr u1 file -- e )
dup writable? if
dup file>write-file @ execute
@ -1379,6 +1382,8 @@ end-struct file%
then
;
\ Read u1-bytes at most from file, write it to c-addr.
\ Return number of bytes read and error-code.
: read-file ( c-addr u1 file -- u2 e )
dup readable? if
dup file>read-file @ execute
@ -1387,6 +1392,7 @@ end-struct file%
then
;
\ Flush output buffer of file, return error-code.
: flush-file ( file -- e )
dup writable? if
dup file>flush-file @ execute
@ -1395,8 +1401,15 @@ end-struct file%
then
;
\ Read a character. Return EOF at end of input.
: key-file ( file -- c ) dup file>key-file @ execute throw ;
\ Read characters from 'file' to the buffer c-addr u1
\ until reaches '\n' or end of file.
\ The last '\n' is not stored to the buffer.
\ u2 is the number of characters written to the buffer.
\ flag=true if it reaches '\n'.
\ e is error code.
: read-line ( c-addr u1 file -- u2 flag e )
dup readable? if
dup file>read-line @ execute