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dnpds40: Query remaining media to see if we can complete job

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* This lets us properly halt the queue if the media has run out
 * Print a warning if we can start, but have insufficient media to finish
This commit is contained in:
Solomon Peachy 2015-06-14 11:33:08 -04:00
parent 7b8844daa9
commit e373d06760
1 changed files with 43 additions and 17 deletions
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60
backend_dnpds40.c
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@ -701,25 +701,52 @@ static int dnpds40_main_loop(void *vctx, int copies) {
}
}
/* See if we can rewind to save media */
if (can_rewind && ctx->supports_rewind &&
(ctx->multicut == 1 || ctx->multicut == 2)) {
int i;
/* Verify we have sufficient media for prints */
{
int i = 0;
/* Get Media remaining */
dnpds40_build_cmd(&cmd, "INFO", "RQTY", 0);
/* See if we can rewind to save media */
if (can_rewind && ctx->supports_rewind &&
(ctx->multicut == 1 || ctx->multicut == 2)) {
resp = dnpds40_resp_cmd(ctx, &cmd, &len);
if (!resp)
return CUPS_BACKEND_FAILED;
/* Get Media remaining */
dnpds40_build_cmd(&cmd, "INFO", "RQTY", 0);
dnpds40_cleanup_string((char*)resp, len);
i = atoi((char*)resp);
resp = dnpds40_resp_cmd(ctx, &cmd, &len);
if (!resp)
return CUPS_BACKEND_FAILED;
/* If the count is odd, we can rewind. */
if (i & 1) {
snprintf(buf, sizeof(buf), "%08d", ctx->multicut + 400);
memcpy(ctx->multicut_offset, buf, 8);
dnpds40_cleanup_string((char*)resp, len);
i = atoi((char*)resp);
free(resp);
/* If the count is odd, we can rewind. */
if (i & 1) {
snprintf(buf, sizeof(buf), "%08d", ctx->multicut + 400);
memcpy(ctx->multicut_offset, buf, 8);
}
}
/* If we didn't succeed with RQTY, try MQTY */
if (i == 0) {
dnpds40_build_cmd(&cmd, "INFO", "MQTY", 0);
resp = dnpds40_resp_cmd(ctx, &cmd, &len);
if (!resp)
return CUPS_BACKEND_FAILED;
dnpds40_cleanup_string((char*)resp, len);
i = atoi((char*)resp);
free(resp);
}
if (i < 1) {
ERROR("Printer out of media, please correct!\n");
return CUPS_BACKEND_STOP;
}
if (i < copies) {
WARNING("Printer does not have sufficient remaining media to complete job..\n");
}
}
@ -753,7 +780,6 @@ static int dnpds40_main_loop(void *vctx, int copies) {
/* Update quantity offset with count */
if (copies > 1) {
// XXX should we verify we have sufficient media for prints?
snprintf(buf, sizeof(buf), "%07d\r", copies);
if (ctx->qty_offset) {
memcpy(ctx->qty_offset, buf, 8);
@ -1447,7 +1473,7 @@ static int dnpds40_cmdline_arg(void *vctx, int argc, char **argv)
/* Exported */
struct dyesub_backend dnpds40_backend = {
.name = "DNP DS40/DS80/DSRX1/DS620",
.version = "0.42",
.version = "0.43",
.uri_prefix = "dnpds40",
.cmdline_usage = dnpds40_cmdline,
.cmdline_arg = dnpds40_cmdline_arg,