ex_hexdump.c
#include "ex_utils.h"
#define CONF_USE_MMAP_DEF FALSE
#define CONF_PRNT_TYPE PRNT_SPAC
#include "hexdump.h"
static unsigned int prnt_high_chars = CONF_PRNT_TYPE;
static void ex_hexdump_process_limit(Vstr_base *s1, Vstr_base *s2,
unsigned int lim)
{
while (s2->len > lim)
{
int proc_data = ex_hexdump_process(s1, s1->len, s2, 1, s2->len,
prnt_high_chars, EX_MAX_W_DATA_INCORE,
TRUE, !lim);
if (s1->conf->malloc_bad)
errno = ENOMEM, err(EXIT_FAILURE, "adding data");
if (!proc_data && (io_put(s1, STDOUT_FILENO) == IO_BLOCK))
io_block(-1, STDOUT_FILENO);
}
}
static void ex_hexdump_read_fd_write_stdout(Vstr_base *s1, Vstr_base *s2,
int fd)
{
while (TRUE)
{
int io_w_state = IO_OK;
int io_r_state = io_get(s2, fd);
if (io_r_state == IO_EOF)
break;
ex_hexdump_process(s1, s1->len, s2, 1, s2->len,
prnt_high_chars, EX_MAX_W_DATA_INCORE,
TRUE, FALSE);
if (s1->conf->malloc_bad)
errno = ENOMEM, err(EXIT_FAILURE, "adding data");
io_w_state = io_put(s1, STDOUT_FILENO);
io_limit(io_r_state, fd, io_w_state, STDOUT_FILENO, s1);
}
ex_hexdump_process_limit(s1, s2, 0);
}
int main(int argc, char *argv[])
{
Vstr_base *s2 = NULL;
Vstr_base *s1 = ex_init(&s2);
int count = 1;
unsigned int use_mmap = CONF_USE_MMAP_DEF;
while (count < argc)
{
if (!strcmp("--", argv[count]))
{
++count;
break;
}
else if (!strcmp("--mmap", argv[count]))
use_mmap = !use_mmap;
else if (!strcmp("--none", argv[count]))
prnt_high_chars = PRNT_NONE;
else if (!strcmp("--space", argv[count]))
prnt_high_chars = PRNT_SPAC;
else if (!strcmp("--high", argv[count]))
prnt_high_chars = PRNT_HIGH;
else if (!strcmp("--version", argv[count]))
{
vstr_add_fmt(s1, 0, "%s", "\
jhexdump 1.0.0\n\
Written by James Antill\n\
\n\
Uses Vstr string library.\n\
");
goto out;
}
else if (!strcmp("--help", argv[count]))
{
vstr_add_fmt(s1, 0, "%s", "\
Usage: jhexdump [FILENAME]...\n\
or: jhexdump OPTION\n\
Output filenames in human hexdump format.\n\
\n\
--help Display this help and exit\n\
--version Output version information and exit\n\
--high Allow space and high characters in ASCII output\n\
--none Allow only small amount of characters ASCII output\n\
--space Allow space characters in ASCII output (default)\n\
--mmap Toggle use of mmap() to load input files\n\
-- Treat rest of cmd line as input filenames\n\
\n\
Report bugs to James Antill <james@and.org>.\n\
");
goto out;
}
else
break;
++count;
}
if (count >= argc)
{
io_fd_set_o_nonblock(STDIN_FILENO);
ex_hexdump_read_fd_write_stdout(s1, s2, STDIN_FILENO);
}
while (count < argc)
{
unsigned int ern = 0;
ASSERT(!s2->len);
if (use_mmap)
vstr_sc_mmap_file(s2, s2->len, argv[count], 0, 0, &ern);
if (!use_mmap ||
(ern == VSTR_TYPE_SC_MMAP_FILE_ERR_FSTAT_ERRNO) ||
(ern == VSTR_TYPE_SC_MMAP_FILE_ERR_MMAP_ERRNO) ||
(ern == VSTR_TYPE_SC_MMAP_FILE_ERR_TOO_LARGE))
{
int fd = io_open(argv[count]);
ex_hexdump_read_fd_write_stdout(s1, s2, fd);
if (close(fd) == -1)
warn("close(%s)", argv[count]);
}
else if (ern && (ern != VSTR_TYPE_SC_MMAP_FILE_ERR_CLOSE_ERRNO))
err(EXIT_FAILURE, "add");
else
ex_hexdump_process_limit(s1, s2, 0);
++count;
}
ASSERT(!s2->len);
out:
io_put_all(s1, STDOUT_FILENO);
exit (ex_exit(s1, s2));
}