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/* :: asciijump (server), gnu gpl v 2
:: copyright (c) grzegorz moskal, eldevarth@nemerle.org */
#define AS_LET_C
#include "as_let.h"
struct var *as_let_head, *as_let_tail;
static void as_let_add_var(struct var *v)
{
if (as_let_head == NULL)
as_let_head = as_let_tail = v;
else {
as_let_tail->next = v;
SWITCH(as_let_tail);
}
}
void as_let_add_int(char *name, int *dest, int lower, int upper, char *help)
{
struct var *v = XALLOC(var);
struct int_var *iv = XALLOC(int_var);
iv->dest = dest;
iv->lower = lower;
iv->upper = upper;
v->variable = (void *)iv;
v->name = strdup(name);
v->type = VINT;
v->help = strdup(help);
v->next = NULL;
as_let_add_var(v);
}
void as_let_add_str(char *name, char **dest, char *help)
{
struct var *v = XALLOC(var);
struct str_var *sv = XALLOC(str_var);
sv->dest = dest;
v->variable = (void *)sv;
v->name = strdup(name);
v->type = VSTRING;
v->help = strdup(help);
v->next = NULL;
as_let_add_var(v);
}
static void as_let_init(void)
{
as_let_add_int("colors", &as_allow_colored_prompt, 0, 1,
"define if display colors");
as_let_add_int("port", (int *)&as_port, 1000, 20000,
"define port to listen for this program");
as_let_add_int("players", &as_limit, 2, 20,
"define max player limit");
as_let_add_str("name", &as_name,
"define this server name (displayed in users)");
as_let_add_str("hilldir", &as_hilldir,
"define hill directory (used when typed: hill read)");
as_let_add_int("verbose", &as_debug, 0, 1,
"define if display diagnostic output");
}
static struct keyword_action as_let_keywords[] = {
{ "show", as_let_show },
{ "help", as_let_help },
{ NULL, NULL}
};
void as_let_parse(void)
{
if (as_let_head == NULL)
as_let_init();
if (as_argv[1] == 0)
as_let_show();
else if (as_run_keyword_action(as_let_keywords) == 0)
as_let_set();
}
static void as_let_set()
{
char *word = as_argv[1];
struct var *v = as_let_find_var(word);
if (v == NULL)
as_display(ERR, "there is no varible called: %s", word);
else if ((word = as_argv[2]) == NULL)
as_let_show_var(v, List);
else
as_let_set_var(v, word);
}
static void as_let_set_int(struct int_var *iv, char *s)
{
int nv = strtol(s, NULL, 10);
if (nv < iv->lower || nv > iv->upper)
as_display(ERR, "%s: value out of bound", s);
else {
*(iv->dest) = nv;
as_display(MSG, "new value: %d", *(iv->dest));
}
}
static void as_let_set_str(struct str_var *sv, char *s)
{
*(sv->dest) = strdup(s);
as_display(MSG, "new value: %s", *(sv->dest));
}
static void as_let_set_var(struct var *v, char *s)
{
switch (v->type) {
case VINT:
as_let_set_int((struct int_var *)v->variable, s);
break;
case VSTRING:
case VFILE: // tmp, pwd not taken!
as_let_set_str((struct str_var *)v->variable, s);
break;
}
}
static struct var *as_let_find_var(char *name)
{
struct var *v = as_let_head;
for (; v; SWITCH(v))
if (strcmp(v->name, name) == 0)
break;
return v;
}
static void as_let_show_var(struct var *v, int type)
{
if (v == NULL)
return;
else if (v->type == VINT) {
struct int_var* iv = (struct int_var *)v->variable;
if (type == List)
as_display(MSG, "%s = %d", v->name, *(iv->dest));
else
as_display(MSG, "%s <int [%d - %d]> - %s", v->name,
iv->lower, iv->upper, v->help);
} else {
struct str_var* sv = (struct str_var *)v->variable;
if (type == List)
as_display(MSG, "%s = %s", v->name, *(sv->dest));
else
as_display(MSG, "%s <%s> - %s", v->name,
(v->type == VSTRING) ? "string" : "file", v->help);
}
}
static void as_let_show_all(int state)
{
struct var *v = as_let_head;
for (v = as_let_head; v; SWITCH(v))
as_let_show_var(v, state);
}
static void as_let_show(void)
{
char *word = as_argv[1];
struct var *v;
if (word == NULL || (word = as_argv[2]) == NULL || strcmp(word, "*") == 0)
as_let_show_all(List);
else if ((v = as_let_find_var(word)))
as_let_show_var(v, List);
else
as_display(ERR, "there is no variable called: %s", word);
}
static char *as_let_help_text =
"let [option]\n\n"
"let show - display all variables\n"
"let show ${name} - display given variable\n"
"let help - show this help\n"
"let help ${name} - remove given let\n"
"let ${name} foo - set value of $name to foo\n\n"
"current variables are:";
static void as_let_help()
{
char *word = as_argv[2];
struct var *v;
if (word == NULL) {
as_display(MSG, as_let_help_text);
as_let_show_all(Help);
} else if ((v = as_let_find_var(word)))
as_let_show_var(v, Help);
else
as_display(ERR, "there is no variable called: %s", word);
}
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