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authorLennart Poettering <lennart@poettering.net>2015-02-13 17:32:38 +0100
committerLennart Poettering <lennart@poettering.net>2015-02-16 15:03:44 +0100
commit2ac7c17f9d8eeb403b91ee5a389562edaf47fb87 (patch)
tree3b55981e7648c1b58aaf6d656e28003c53c3497c /src/libsystemd/sd-bus/bus-gvariant.c
parent38ab096869ad6bb39a9ef9a012abfb42ea62cd93 (diff)
Revert "Revert "sd-bus: change serialization of kdbus messages to qualify in their entirety as gvariant objects""
This reverts commit 954871d8ba15911d014f76ed2c7a9492953cf39d.
Diffstat (limited to 'src/libsystemd/sd-bus/bus-gvariant.c')
-rw-r--r--src/libsystemd/sd-bus/bus-gvariant.c60
1 files changed, 60 insertions, 0 deletions
diff --git a/src/libsystemd/sd-bus/bus-gvariant.c b/src/libsystemd/sd-bus/bus-gvariant.c
index dc40009925..02b95cd136 100644
--- a/src/libsystemd/sd-bus/bus-gvariant.c
+++ b/src/libsystemd/sd-bus/bus-gvariant.c
@@ -247,3 +247,63 @@ int bus_gvariant_is_fixed_size(const char *signature) {
return true;
}
+
+size_t bus_gvariant_determine_word_size(size_t sz, size_t extra) {
+ if (sz + extra <= 0xFF)
+ return 1;
+ else if (sz + extra*2 <= 0xFFFF)
+ return 2;
+ else if (sz + extra*4 <= 0xFFFFFFFF)
+ return 4;
+ else
+ return 8;
+}
+
+size_t bus_gvariant_read_word_le(void *p, size_t sz) {
+ union {
+ uint16_t u16;
+ uint32_t u32;
+ uint64_t u64;
+ } x;
+
+ assert(p);
+
+ if (sz == 1)
+ return *(uint8_t*) p;
+
+ memcpy(&x, p, sz);
+
+ if (sz == 2)
+ return le16toh(x.u16);
+ else if (sz == 4)
+ return le32toh(x.u32);
+ else if (sz == 8)
+ return le64toh(x.u64);
+
+ assert_not_reached("unknown word width");
+}
+
+void bus_gvariant_write_word_le(void *p, size_t sz, size_t value) {
+ union {
+ uint16_t u16;
+ uint32_t u32;
+ uint64_t u64;
+ } x;
+
+ assert(p);
+ assert(sz == 8 || (value < (1ULL << (sz*8))));
+
+ if (sz == 1) {
+ *(uint8_t*) p = value;
+ return;
+ } else if (sz == 2)
+ x.u16 = htole16((uint16_t) value);
+ else if (sz == 4)
+ x.u32 = htole32((uint32_t) value);
+ else if (sz == 8)
+ x.u64 = htole64((uint64_t) value);
+ else
+ assert_not_reached("unknown word width");
+
+ memcpy(p, &x, sz);
+}