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Refactor the filter functions

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Replace all the different internal filter functions with one generic
function and a set of callback functions.
This commit is contained in:
Jef Driesen 2019-07-02 21:14:49 +02:00
parent c70046bccf
commit 209890daeb
1 changed files with 72 additions and 51 deletions
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123
src/descriptor.c
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@ -28,6 +28,17 @@
#include "platform.h"
#define C_ARRAY_SIZE(array) (sizeof (array) / sizeof *(array))
#define C_ARRAY_ITEMSIZE(array) (sizeof *(array))
#define DC_FILTER_INTERNAL(key, values, isnullterminated, match) \
dc_filter_internal( \
key, \
values, \
C_ARRAY_SIZE(values) - isnullterminated, \
C_ARRAY_ITEMSIZE(values), \
match)
typedef int (*dc_match_t)(const void *, const void *);
static int dc_filter_uwatec (dc_transport_t transport, const void *userdata);
static int dc_filter_suunto (dc_transport_t transport, const void *userdata);
@ -359,56 +370,62 @@ static const dc_descriptor_t g_descriptors[] = {
};
static int
dc_filter_internal_name (const char *name, const char *values[], size_t count)
dc_match_name (const void *key, const void *value)
{
if (name == NULL)
const char *k = (const char *) key;
const char *v = *(const char * const *) value;
return strcasecmp (k, v) == 0;
}
static int
dc_match_prefix (const void *key, const void *value)
{
const char *k = (const char *) key;
const char *v = *(const char * const *) value;
return strncasecmp (k, v, strlen (v)) == 0;
}
static int
dc_match_devname (const void *key, const void *value)
{
const char *k = (const char *) key;
const char *v = *(const char * const *) value;
return strncmp (k, v, strlen (v)) == 0;
}
static int
dc_match_usb (const void *key, const void *value)
{
const dc_usb_desc_t *k = (const dc_usb_desc_t *) key;
const dc_usb_desc_t *v = (const dc_usb_desc_t *) value;
return k->vid == v->vid && k->pid == v->pid;
}
static int
dc_filter_internal (const void *key, const void *values, size_t count, size_t size, dc_match_t match)
{
if (key == NULL)
return 0;
for (size_t i = 0; i < count; ++i) {
if (strcasecmp (name, values[i]) == 0) {
if (match (key, (const unsigned char *) values + i * size)) {
return 1;
}
}
return 0;
return count == 0;
}
static int
dc_filter_internal_usb (const dc_usb_desc_t *desc, const dc_usb_desc_t values[], size_t count)
{
if (desc == NULL)
return 0;
for (size_t i = 0; i < count; ++i) {
if (desc->vid == values[i].vid &&
desc->pid == values[i].pid) {
return 1;
}
}
return 0;
}
static int
dc_filter_internal_rfcomm (const char *name)
{
static const char *prefixes[] = {
static const char *rfcomm[] = {
#if defined (__linux__)
"/dev/rfcomm",
"/dev/rfcomm",
#endif
NULL
};
if (name == NULL)
return 0;
for (size_t i = 0; prefixes[i] != NULL; ++i) {
if (strncmp (name, prefixes[i], strlen (prefixes[i])) == 0)
return 1;
}
return prefixes[0] == NULL;
}
NULL
};
static int dc_filter_uwatec (dc_transport_t transport, const void *userdata)
{
@ -434,11 +451,11 @@ static int dc_filter_uwatec (dc_transport_t transport, const void *userdata)
};
if (transport == DC_TRANSPORT_IRDA) {
return dc_filter_internal_name ((const char *) userdata, irda, C_ARRAY_SIZE(irda));
return DC_FILTER_INTERNAL (userdata, irda, 0, dc_match_name);
} else if (transport == DC_TRANSPORT_USBHID) {
return dc_filter_internal_usb ((const dc_usb_desc_t *) userdata, usbhid, C_ARRAY_SIZE(usbhid));
return DC_FILTER_INTERNAL (userdata, usbhid, 0, dc_match_usb);
} else if (transport == DC_TRANSPORT_BLE) {
return dc_filter_internal_name ((const char *) userdata, bluetooth, C_ARRAY_SIZE(bluetooth));
return DC_FILTER_INTERNAL (userdata, bluetooth, 0, dc_match_name);
}
return 1;
@ -458,9 +475,9 @@ static int dc_filter_suunto (dc_transport_t transport, const void *userdata)
};
if (transport == DC_TRANSPORT_USBHID) {
return dc_filter_internal_usb ((const dc_usb_desc_t *) userdata, usbhid, C_ARRAY_SIZE(usbhid));
return DC_FILTER_INTERNAL (userdata, usbhid, 0, dc_match_usb);
} else if (transport == DC_TRANSPORT_BLE) {
return dc_filter_internal_name ((const char *) userdata, bluetooth, C_ARRAY_SIZE(bluetooth));
return DC_FILTER_INTERNAL (userdata, bluetooth, 0, dc_match_name);
}
return 1;
@ -468,11 +485,15 @@ static int dc_filter_suunto (dc_transport_t transport, const void *userdata)
static int dc_filter_hw (dc_transport_t transport, const void *userdata)
{
static const char *bluetooth[] = {
"OSTC",
"FROG",
};
if (transport == DC_TRANSPORT_BLUETOOTH || transport == DC_TRANSPORT_BLE) {
return strncasecmp ((const char *) userdata, "OSTC", 4) == 0 ||
strncasecmp ((const char *) userdata, "FROG", 4) == 0;
return DC_FILTER_INTERNAL (userdata, bluetooth, 0, dc_match_prefix);
} else if (transport == DC_TRANSPORT_SERIAL) {
return dc_filter_internal_rfcomm ((const char *) userdata);
return DC_FILTER_INTERNAL (userdata, rfcomm, 1, dc_match_devname);
}
return 1;
@ -489,9 +510,9 @@ static int dc_filter_shearwater (dc_transport_t transport, const void *userdata)
};
if (transport == DC_TRANSPORT_BLUETOOTH || transport == DC_TRANSPORT_BLE) {
return dc_filter_internal_name ((const char *) userdata, bluetooth, C_ARRAY_SIZE(bluetooth));
return DC_FILTER_INTERNAL (userdata, bluetooth, 0, dc_match_name);
} else if (transport == DC_TRANSPORT_SERIAL) {
return dc_filter_internal_rfcomm ((const char *) userdata);
return DC_FILTER_INTERNAL (userdata, rfcomm, 1, dc_match_devname);
}
return 1;
@ -504,9 +525,9 @@ static int dc_filter_tecdiving (dc_transport_t transport, const void *userdata)
};
if (transport == DC_TRANSPORT_BLUETOOTH) {
return dc_filter_internal_name ((const char *) userdata, bluetooth, C_ARRAY_SIZE(bluetooth));
return DC_FILTER_INTERNAL (userdata, bluetooth, 0, dc_match_name);
} else if (transport == DC_TRANSPORT_SERIAL) {
return dc_filter_internal_rfcomm ((const char *) userdata);
return DC_FILTER_INTERNAL (userdata, rfcomm, 1, dc_match_devname);
}
return 1;
@ -519,7 +540,7 @@ static int dc_filter_mares (dc_transport_t transport, const void *userdata)
};
if (transport == DC_TRANSPORT_BLE) {
return dc_filter_internal_name ((const char *) userdata, bluetooth, C_ARRAY_SIZE(bluetooth));
return DC_FILTER_INTERNAL (userdata, bluetooth, 0, dc_match_name);
}
return 1;