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#include <zup.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <errno.h>
#ifdef USE_READLINE
#include <readline/readline.h>
#include <readline/history.h>
#endif // USE_READLINE
typedef int (*repl_command)(int, const struct param*, int, char**);
static int
repl_read(int fd, const struct param *param, int argc, char **args)
{
int err = 0;
uint8_t buf[MAX_PACKET_SIZE];
uint8_t bank;
uint16_t address;
uint16_t length;
const char *pathname = NULL;
if (argc != 3 && argc != 4)
goto syntax_error;
errno = 0;
bank = strtoul(args[0], NULL, 16);
err |= errno;
errno = 0;
address = strtoul(args[1], NULL, 16);
err |= errno;
errno = 0;
length = strtoul(args[2], NULL, 16);
err |= errno;
if (argc == 4)
pathname = args[3];
if (err)
goto syntax_error;
if ((err = z_read(fd, bank, address, length, buf))) {
print_error(err);
return err;
}
hexdump(address, length, buf);
if (pathname) {
FILE *file;
if (!(file = fopen(pathname, "w"))) {
perror("File could not be opened");
return -1;
}
fwrite(buf, sizeof(uint8_t), length, file);
fclose(file);
}
return err;
syntax_error:
fputs("Usage: read <bank> <address> <length> [pathname]\n", stderr);
return 1;
}
/*
static int
parse_args(const char *fname, const char *types, int argc, char **args, ...)
{
}
*/
static int
repl_write(int fd, const struct param *param, int argc, char **args)
{
int err;
char line[512];
uint8_t buf[MAX_PACKET_SIZE];
char *p;
uint8_t bank;
uint16_t address;
uint16_t length = 0;
do {
// TODO: Handle fgets error
fgets(line, LEN(line), stdin);
if (line && !strcmp("\n", line))
break;
p = strtok(line, " \n");
while (p && length < 10) {
errno = 0;
buf[length++] = strtoul(p, NULL, 16);
p = strtok(NULL, " \n");
}
if (p) {
fputs("WRITE: Input can't be longer than 256 bytes\n", stderr);
return -1;
}
} while (1);
if ((err = z_write(fd, bank, address, length, buf))) {
print_error(err);
return err;
}
return 0;
}
static int
repl_echo(int fd, const struct param *param, int argc, char **args)
{
int err;
char line[512];
char buf[MAX_PACKET_SIZE];
memset(line, 0, sizeof(line));
memset(buf, 0, sizeof(buf));
size_t length = 0;
do {
// TODO: Handle fgets error
fgets(line, LEN(line), stdin);
if (line && !strcmp("\n", line))
break;
size_t len = strlen(line);
if (line[len - 1] == '\n')
line[--len] = '\0';
if (length + len >= MAX_PACKET_SIZE) {
fputs("ECHO: Input can't be longer than 256 bytes\n", stderr);
return -1;
}
strcat(buf, line);
length += len;
} while (1);
if ((err = z_echo(fd, length, (uint8_t *)buf))) {
print_error(err);
return err;
}
fwrite(buf, sizeof(uint8_t), length, stdout);
putchar('\n');
fflush(stdout);
return 0;
}
static int
repl_io_read(int fd, const struct param *param, int argc, char **args)
{
return 0;
}
static int
repl_io_write(int fd, const struct param *param, int argc, char **args)
{
return 0;
}
/*
static volatile sig_atomic_t quit = 0;
void
interrupt_handler(int signal)
{
puts("Bye!");
quit = 1;
// fclose(stdin);
}
*/
// TODO: Handle signals (CTRL-C)
// TODO: Print errors when in repl and crash if from terminal
void
repl(int fd, struct param *param)
{
struct command {
const char *name;
repl_command fptr;
int quit;
};
const struct command cmd_table[] = {
{"read", repl_read, 0},
{"write", repl_write, 0},
{"echo", repl_echo, 0},
{"io_read", repl_io_read, 0},
{"io_write", repl_io_write, 0},
{"quit", NULL, 1}
};
int quit = 0;
#ifdef USE_READLINE
using_history();
#endif
while (!quit) {
#ifdef USE_READLINE
char *line = readline("* ");
if (!line)
break;
add_history(line);
#else
size_t len = 0;
char line[512];
fputs("* ", stdout);
if (!fgets(line, sizeof(line), stdin))
break;
len = strlen(line);
if (line[len - 1] == '\n')
line[len - 1] = '\0';
#endif
int argc = 1;
char *args[MAX_ARGS] = { NULL };
// Parse command
args[0] = strtok(line, " ");
if (!args[0])
goto skip;
while(argc < MAX_ARGS && (args[argc] = strtok(NULL, " ")))
++argc;
// Match action
int cmdi;
for (cmdi = 0; cmdi < LEN(cmd_table); ++cmdi) {
if (!strcmp(args[0], cmd_table[cmdi].name))
break;
}
// Call action
if (cmdi == LEN(cmd_table)) {
fprintf(stdout, "Unknown command %s\n", args[0]);
} else {
repl_command fptr = cmd_table[cmdi].fptr;
if (fptr)
fptr(fd, param, argc - 1, &args[1]);
quit = cmd_table[cmdi].quit;
}
skip:
#ifdef USE_READLINE
free(line);
#endif
}
}
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