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#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <unistd.h>
#include "stlfile.h"
#define ARRSIZE(x) (sizeof(x)/sizeof((x)[0]))
struct command {
const char *name;
void (*func)();
};
void request_info();
void parse_file();
void cat_flag();
void list_commands();
struct command commands[] = {
{ "request", request_info },
{ "info", parse_file },
{ "cat", cat_flag },
{ "ls", list_commands },
};
const char*
ask(const char *fmtstr, ...)
{
static char linebuf[256];
va_list ap;
va_start(ap, fmtstr);
vprintf(fmtstr, ap);
va_end(ap);
fgets(linebuf, sizeof(linebuf), stdin);
return linebuf;
}
void*
die(const char *fmtstr, ...)
{
va_list ap;
va_start(ap, fmtstr);
vfprintf(stderr, fmtstr, ap);
va_end(ap);
exit(EXIT_FAILURE);
}
void
request_info()
{
const char *bufp;
char *end, *contents;
int len;
bufp = ask("How large is your file?\n");
len = strtoul(bufp, &end, 10);
if (!len || *end || len < 7000)
die("Invalid file length!\n");
printf("Ok! Im listening..\n");
contents = malloc(len);
read(STDIN_FILENO, contents, len);
printf("I got: %s\n", contents);
free(contents);
}
void
parse_file()
{
printf("hi\n");
}
void
cat_flag()
{
FILE *f;
char catbuf[256];
int nb;
f = fopen("cat", "r");
nb = fread(catbuf, 1, sizeof(catbuf), f);
fclose(f);
printf("%.*s\n", nb, catbuf);
}
void
list_commands()
{
int i;
printf("Available commands:\n");
for (i = 0; i < ARRSIZE(commands); i++)
printf("%s%s", i ? " " : "", commands[i].name);
printf("\n");
}
int
main()
{
char linebuf[256], *cp;
int exit, i;
exit = 0;
while (!exit) {
memset(linebuf, ' ', sizeof(linebuf));
printf("$ ");
exit = !fgets(linebuf, sizeof(linebuf), stdin);
if (exit || !*linebuf) break;
if (*linebuf == '\n') continue;
linebuf[strlen(linebuf) - 1] = '\0';
cp = strchr(linebuf, ' ');
if (cp) *cp = 0;
for (i = 0; i < ARRSIZE(commands); i++) {
if (!strcmp(commands[i].name, linebuf)) {
commands[i].func();
break;
}
}
}
printf("see you later!\n");
}
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