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dj(1): iron out Io_bufxapp

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This commit is contained in:
dtb 2024-07-03 17:50:04 -06:00
parent 7fe122ac3b
commit f4b97be1f1
Signed by: trinity
GPG Key ID: 34C0543BBB6AF81B
1 changed files with 10 additions and 20 deletions
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src/dj.c
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@ -75,25 +75,6 @@ Io_bufrpad(struct Io *io, int padding){
return io;
}
/* Copies from the buffer in src as much as possible to the free space in the
* dest buffer, removing the copied units from src and permuting the remaining
* units in the src buffer to the start of the buffer, modifying both the src
* and dest bufuse and returning dest. */
static struct Io*
Io_bufxapp(struct Io *dest, struct Io *src){
int n;
assert(dest != NULL && src != NULL);
n = MIN(src->bufuse, dest->bs - dest->bufuse);
memcpy(dest->buf + dest->bufuse, src->buf, n);
dest->bufuse += n;
memmove(src->buf, src->buf + n, src->bs - n);
src->bufuse -= n;
return dest;
}
/* Copies from the buffer in src to the buffer in dest no more than n units,
* removing the copied units from src and permuting the remaining units in the
* src buffer to the start of the buffer, modifying both the src and dest
@ -338,7 +319,16 @@ int main(int argc, char *argv[]){
int t;
if(io[1].bs > io[0].bs){
Io_bufxapp(&io[1], &io[0]);
int n;
/* copy from ibuf as much as possible to the obuf */
memcpy(io[1].buf + io[1].bufuse, io[0].buf,
(n = MIN(io[0].bufuse, io[1].bs - io[1].bufuse)));
io[1].bufuse += n;
/* permute out the copied units */
memmove(io[0].buf, io[0].buf + n, io[0].bs - n);
io[0].bufuse -= n;
if(io[0].bs + io[1].bufuse <= io[1].bs && count != 1)
continue; /* we could write more */
}else