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#include "command.h"
#include <stdlib.h>
struct commands command_list_create(uint32_t capacity) {
return (struct commands){
.commands = calloc(capacity, sizeof(struct hashed_command)),
.ncommands = 0,
.capacity = capacity,
};
}
void command_list_destroy(struct commands *commands) {
free(commands->commands);
commands->ncommands = 0;
commands->capacity = 0;
}
uint32_t hash_command_name(const char *name) {
unsigned long hash = 5381;
int c;
while ((c = *name++))
hash = ((hash << 5) + hash) + c; /* hash * 33 + c */
return hash;
}
uint32_t register_command(struct commands *commands, struct command *command) {
if (commands->ncommands == commands->capacity) {
commands->capacity *= 2;
commands->commands = realloc(
commands->commands, sizeof(struct hashed_command) * commands->capacity);
}
uint32_t hash = hash_command_name(command->name);
commands->commands[commands->ncommands] =
(struct hashed_command){.command = command, .hash = hash};
++commands->ncommands;
return hash;
}
void register_commands(struct commands *command_list, struct command *commands,
uint32_t ncommands) {
for (uint32_t ci = 0; ci < ncommands; ++ci) {
register_command(command_list, &commands[ci]);
}
}
struct command *lookup_command(struct commands *command_list,
const char *name) {
uint32_t needle = hash_command_name(name);
return lookup_command_by_hash(command_list, needle);
}
struct command *lookup_command_by_hash(struct commands *commands,
uint32_t hash) {
for (uint32_t ci = 0; ci < commands->ncommands; ++ci) {
if (commands->commands[ci].hash == hash) {
return commands->commands[ci].command;
}
}
return NULL;
}
int32_t execute_command(struct command *command, struct buffer *current_buffer,
int argc, const char *argv[]) {
command->fn((struct command_ctx){.current_buffer = current_buffer,
.userdata = command->userdata},
argc, argv);
// TODO
return 0;
}
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