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authorMattias Andrée <maandree@kth.se>2016-07-10 21:57:04 +0200
committerMattias Andrée <maandree@kth.se>2016-07-10 21:57:04 +0200
commit96399ca27c075339791a088feb80e03f9f3587d1 (patch)
treeffad2ffb2b2ac2228b0a8b805192bcbc4457e3c0 /src/ramps.c
parentm (diff)
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Work on marshalling
Signed-off-by: Mattias Andrée <maandree@kth.se>
Diffstat (limited to '')
-rw-r--r--src/ramps.c96
1 files changed, 96 insertions, 0 deletions
diff --git a/src/ramps.c b/src/ramps.c
new file mode 100644
index 0000000..2c24b52
--- /dev/null
+++ b/src/ramps.c
@@ -0,0 +1,96 @@
+/**
+ * gammad -- Cooperative gamma server
+ * Copyright (C) 2016 Mattias Andrée (maandree@kth.se)
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "ramps.h"
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+
+/**
+ * The name of the process
+ */
+extern char* argv0;
+
+
+
+/**
+ * Marshal a ramp trio
+ *
+ * @param this The ramps
+ * @param buf Output buffer for the marshalled ramps,
+ * `NULL` just measure how large the buffers
+ * needs to be
+ * @param ramps_size The byte-size of ramps
+ * @return The number of marshalled byte
+ */
+size_t gamma_ramps_marshal(const union gamma_ramps* this, char* buf, size_t ramps_size)
+{
+ if (buf != NULL)
+ memcpy(buf, this->u8.red, ramps_size);
+ return ramps_size;
+}
+
+
+/**
+ * Unmarshal a ramp trio
+ *
+ * @param this Output for the ramps, `.red_size`, `.green_size`,
+ * and `.blue_size` must already be set
+ * @param buf Buffer with the marshalled ramps
+ * @param ramps_size The byte-size of ramps
+ * @return The number of unmarshalled bytes, 0 on error
+ */
+size_t gamma_ramps_unmarshal(union gamma_ramps* this, const char* buf, size_t ramps_size)
+{
+ size_t depth = ramps_size / (this->u8.red_size + this->u8.green_size + this->u8.blue_size);
+ int r = 0;
+ switch (depth)
+ {
+ case 1:
+ r = libgamma_gamma_ramps8_initialise(&(this->u8));
+ break;
+ case 2:
+ r = libgamma_gamma_ramps16_initialise(&(this->u16));
+ break;
+ case 4:
+ r = libgamma_gamma_ramps32_initialise(&(this->u32));
+ break;
+ case 8:
+ r = libgamma_gamma_ramps64_initialise(&(this->u64));
+ break;
+ default:
+ if (depth == sizeof(float))
+ r = libgamma_gamma_rampsf_initialise(&(this->f));
+ else if (depth == sizeof(double))
+ r = libgamma_gamma_rampsd_initialise(&(this->d));
+ else
+ abort();
+ break;
+ }
+ if (r)
+ {
+ libgamma_perror(argv0, r);
+ errno = 0;
+ return 0;
+ }
+ memcpy(this->u8.red, buf, ramps_size);
+ return ramps_size;
+}
+