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#include "rc.h"
#include <errno.h>
#include <stdio.h>
#include <dirent.h>
#include <sys/types.h>
#include <readline/readline.h>
#include <readline/history.h>
#include <readline/rltypedefs.h>
#include "edit.h"
bool editing = 1;
struct cookie {
char *buffer;
};
static char *compl_extcmd(const char *text, int state) {
static DIR *d;
static List *path;
static size_t len;
if (!state) {
d = NULL;
path = varlookup("path");
len = strlen(text);
}
while (d || path) {
if (!d)
d = opendir(path->w);
else {
struct dirent *e;
while ((e = readdir(d))) {
if (strncmp(e->d_name, text, len) == 0)
return strdup(e->d_name);
}
closedir(d);
d = NULL;
path = path->n;
}
}
return NULL;
}
static rl_compentry_func_t *const compl_cmd_funcs[] = {
compl_builtin,
compl_fn,
compl_extcmd
};
static char *compl_command(const char *text, int state) {
static size_t i;
static int s;
char *name = NULL;
if (!state) {
i = 0;
s = 0;
}
while (name == NULL && i < arraysize(compl_cmd_funcs)) {
name = compl_cmd_funcs[i](text, s);
if (name != NULL) {
s = 1;
} else {
i++;
s = 0;
}
}
return name;
}
static rl_compentry_func_t *compl_func(const char *text, int start, int end) {
int quote = FALSE;
char last = ';', *s, *t;
for (s = &rl_line_buffer[0], t = &rl_line_buffer[start]; s < t; s++) {
if (!quote && *s != ' ' && *s != '\t')
last = *s;
if (*s == '\'')
quote = !quote;
}
switch (last) {
case '`': case '@': case '|': case '&':
case '(': case ')': case '{': case ';':
return compl_command;
case '$':
return compl_var;
}
return NULL;
}
static rl_compentry_func_t *compentry_func;
static char **rc_completion(const char *text, int start, int end) {
rl_compentry_func_t *func;
if (compentry_func != NULL) {
func = compentry_func;
compentry_func = NULL;
rl_attempted_completion_over = 1;
} else
func = compl_func(text, start, end);
if (func != NULL)
return rl_completion_matches(text, func);
else
return NULL;
}
static int expl_complete(rl_compentry_func_t *func, int count, int key) {
if (rl_last_func == rl_complete)
rl_last_func = NULL;
compentry_func = func;
return rl_complete(count, key);
}
static int rc_complete_command(int count, int key) {
return expl_complete(compl_extcmd, count, key);
}
static int rc_complete_filename(int count, int key) {
return expl_complete(rl_filename_completion_function, count, key);
}
static int rc_complete_variable(int count, int key) {
return expl_complete(compl_var, count, key);
}
void *edit_begin(int fd) {
List *hist;
struct cookie *c;
rl_initialize();
rl_attempted_completion_function = rc_completion;
rl_catch_signals = 0;
rl_completer_quote_characters = "'";
rl_filename_quote_characters = "\t\n !#$&'()*;<=>?@[\\]^`{|}~";
rl_readline_name = "rc";
rl_add_funmap_entry("rc-complete-command", rc_complete_command);
rl_add_funmap_entry("rc-complete-filename", rc_complete_filename);
rl_add_funmap_entry("rc-complete-variable", rc_complete_variable);
rl_bind_keyseq("\e!", rc_complete_command);
rl_bind_keyseq("\e/", rc_complete_filename);
rl_bind_keyseq("\e$", rc_complete_variable);
hist = varlookup("history");
if (hist != NULL)
if (read_history(hist->w) != 0 && errno != ENOENT) /* ignore if missing */
uerror(hist->w);
c = ealloc(sizeof *c);
c->buffer = NULL;
return c;
}
static void (*oldint)(int), (*oldquit)(int);
static void edit_catcher(int sig) {
sys_signal(SIGINT, oldint);
sys_signal(SIGQUIT, oldquit);
write(2, "\n", 1);
rc_raise(eError);
}
static char *prompt;
char *edit_alloc(void *cookie, size_t *count) {
struct cookie *c = cookie;
oldint = sys_signal(SIGINT, edit_catcher);
oldquit = sys_signal(SIGQUIT, edit_catcher);
rl_reset_screen_size();
c->buffer = readline(prompt);
sys_signal(SIGINT, oldint);
sys_signal(SIGQUIT, oldquit);
if (c->buffer) {
*count = strlen(c->buffer);
if (*count)
add_history(c->buffer);
c->buffer[*count] = '\n';
++*count; /* include the \n */
}
return c->buffer;
}
void edit_prompt(void *cookie, char *pr) {
prompt = pr;
}
void edit_free(void *cookie) {
struct cookie *c = cookie;
efree(c->buffer);
/* Set c->buffer to NULL, allowing us to "overfree" it. This
is a bit of a kludge, but it's otherwise hard to deal with
the case where a signal causes an early return from
readline. */
c->buffer = NULL;
}
void edit_end(void *cookie) {
struct cookie *c = cookie;
efree(c);
}
void edit_reset(void *cookie) {
rl_reset_terminal(NULL);
}
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