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core: add C struct device and struct device_table accessors

Browse source 
Up to now, "struct device" and "struct device_table" were C++
only, because they used C++ strings for convenience. Since we
switched from QString to std::string, we can create accessors
for these structs. For the C code, we simply declare them as
opaque structs and give the full definition only for C++.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2020-10-05 20:55:57 +02:00 • committed by Dirk Hohndel
parent 4a50badb57
commit c4bfecce1b
2 changed files with 52 additions and 2 deletions
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37
core/device.cpp
View file

@ -358,3 +358,40 @@ const char *get_dc_nickname(const struct divecomputer *dc)
else
return dc->model;
}
extern "C" int nr_devices(const struct device_table *table)
{
return (int)table->devices.size();
}
extern "C" const struct device *get_device(const struct device_table *table, int i)
{
if (i < 0 || i > nr_devices(table))
return NULL;
return &table->devices[i];
}
extern "C" const char *device_get_model(const struct device *dev)
{
return dev ? dev->model.c_str() : NULL;
}
extern "C" const uint32_t device_get_id(const struct device *dev)
{
return dev ? dev->deviceId : -1;
}
extern "C" const char *device_get_serial(const struct device *dev)
{
return dev ? dev->serialNumber.c_str() : NULL;
}
extern "C" const char *device_get_firmware(const struct device *dev)
{
return dev ? dev->firmware.c_str() : NULL;
}
extern "C" const char *device_get_nickname(const struct device *dev)
{
return dev ? dev->nickName.c_str() : NULL;
}

17
core/device.h
View file

@ -9,15 +9,30 @@ extern "C" {
#endif
struct divecomputer;
struct device;
struct device_table;
// global device table
extern struct device_table device_table;
extern void fake_dc(struct divecomputer *dc);
extern void set_dc_deviceid(struct divecomputer *dc, unsigned int deviceid);
extern void set_dc_nickname(struct dive *dive);
extern void create_device_node(const char *model, uint32_t deviceid, const char *serial, const char *firmware, const char *nickname);
extern int nr_devices(const struct device_table *table);
extern const struct device *get_device(const struct device_table *table, int i);
extern void call_for_each_dc(void *f, void (*callback)(void *, const char *, uint32_t,
const char *, const char *, const char *), bool select_only);
extern void clear_device_nodes();
const char *get_dc_nickname(const struct divecomputer *dc);
// struct device accessors for C-code. The returned strings are not stable!
const char *device_get_model(const struct device *dev);
const uint32_t device_get_id(const struct device *dev);
const char *device_get_serial(const struct device *dev);
const char *device_get_firmware(const struct device *dev);
const char *device_get_nickname(const struct device *dev);
#ifdef __cplusplus
}
#endif
@ -44,8 +59,6 @@ struct device_table {
std::vector<device> devices;
};
extern struct device_table device_table;
#endif
#endif // DEVICE_H