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event-sequence-transformation
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Add "enums" config section

This commit is contained in:
Vftdan 2024-08-16 11:58:19 +02:00
parent 174d57666b
commit 85282bed0e
2 changed files with 91 additions and 5 deletions
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87
config.c
View File

@ -159,6 +159,91 @@ load_constants_section(const config_setting_t *config_section, ConstantRegistry
}
}
static void
put_enum_value(ConstantRegistry *registry, const char *enum_name, const char *member_name, const long long value)
{
if (!enum_name || !member_name) {
return;
}
size_t enum_len = strlen(enum_name);
size_t member_len = strlen(member_name);
size_t mem_size = enum_len + /* "." */ 1 + member_len + /* terminator */ 1;
char* qualified_name = malloc(mem_size);
qualified_name[0] = '\0';
strncat(qualified_name, enum_name, enum_len);
strncat(qualified_name, ".", 1);
strncat(qualified_name, member_name, member_len);
hash_table_insert(registry, hash_table_key_from_cstr(qualified_name), &value);
free(qualified_name);
}
static void
load_single_enum(const char *enum_name, const config_setting_t *enum_def, ConstantRegistry *constants)
{
ssize_t length = config_setting_length(enum_def);
if (length <= 0) {
return;
}
long long prev_value = -1;
for (ssize_t i = 0; i < length; ++i) {
config_setting_t *member = config_setting_get_elem(enum_def, i);
if (!member) {
continue;
}
const config_setting_t *value_setting = member;
long long value = prev_value + 1; // FIXME in theory, signed overflow is UB
bool only_name = false;
const char *name = config_setting_name(member);
if (!name) {
config_setting_lookup_string(member, "name", &name);
}
if (!name) {
name = config_setting_get_string(member);
only_name = true;
}
if (!name) {
continue;
}
if (config_setting_is_aggregate(member)) {
value_setting = config_setting_get_member(member, "value");
}
if (!only_name) {
value = resolve_constant_or(constants, value_setting, value);
}
prev_value = value;
put_enum_value(constants, enum_name, name, value);
}
}
static void
load_enums_section(const config_setting_t *config_section, ConstantRegistry *constants)
{
if (!config_section) {
return;
}
ssize_t length = config_setting_length(config_section);
if (length <= 0) {
return;
}
for (ssize_t i = 0; i < length; ++i) {
config_setting_t *enum_def = config_setting_get_elem(config_section, i);
if (!enum_def) {
continue;
}
const char *name = config_setting_name(enum_def);
// DEBUG_PRINT_VALUE(name, "%s");
if (!name) {
continue;
}
load_single_enum(name, enum_def, constants);
}
}
bool
load_config(const config_setting_t *config_root, FullConfig *config)
{
@ -168,8 +253,10 @@ load_config(const config_setting_t *config_root, FullConfig *config)
const config_setting_t *node_config = config_setting_get_member(config_root, "nodes");
const config_setting_t *channel_config = config_setting_get_member(config_root, "channels");
const config_setting_t *constants_config = config_setting_get_member(config_root, "constants");
const config_setting_t *enums_config = config_setting_get_member(config_root, "enums");
hash_table_init(&config->constants, NULL);
load_constants_section(constants_config, &config->constants);
load_enums_section(enums_config, &config->constants);
config->nodes = load_nodes_section(node_config);
config->channels = load_channels_section(channel_config, &config->constants);
return true;

9
config.cfg
View File

@ -1,13 +1,12 @@
constants = {
ns_stdin = 0;
ns_clickpad = 1;
enums = {
namespaces: ["stdin", "clickpad"];
};
nodes = {
stdin = {
type = "getchar";
options = {
namespace = "ns_stdin";
namespace = "namespaces.stdin";
};
};
print = {
@ -18,7 +17,7 @@ nodes = {
type = "evdev";
options = {
file = "/dev/input/event7";
namespace = "ns_clickpad";
namespace = "namespaces.clickpad";
};
};
};