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/*
* UNG's Not GNU
*
* Copyright (c) 2011, Jakob Kaivo <jakob@kaivo.net>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#define _POSIX_C_SOURCE 2
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define K_BYTES 1024
#define M_BYTES 1048576
static unsigned long power(int base, int power)
{
unsigned long r = base;
if (power < 1)
return 1;
for (r = base; power > 1; power--)
r *= r;
return r;
}
static int
split(const char *in, const char *base, int suffix, unsigned int lines, unsigned long bytes)
{
FILE *f = stdin;
FILE *o = NULL;
char oname[FILENAME_MAX];
int chunk = 0;
int i;
char *buf;
size_t len;
size_t nread;
if (strcmp("-", in))
f = fopen(in, "r");
if (bytes > 0)
buf = malloc(bytes);
else
buf = malloc(BUFSIZ);
memset(oname, '\0', FILENAME_MAX);
strcpy(oname, base);
while (!feof(f)) {
if (chunk >= power(26, suffix))
return 2; // to much data
for (i = suffix; i > 0; i--)
oname[strlen(base) + suffix - i] =
((chunk % power(26, i)) / power(26, i - 1)) + 'a';
o = fopen(oname, "w");
if (lines > 0) {
for (i = lines; !feof(f) && i > 0; i--) {
if ((nread = getline(&buf, &len, f)) != -1)
fwrite(buf, sizeof(char), nread, o);
}
} else {
if ((nread = fread(buf, sizeof(char), bytes, f)) != -1)
fwrite(buf, sizeof(char), nread, o);
}
fclose(o);
chunk++;
}
if (strcmp("-", in))
fclose(f);
}
int main(int argc, char **argv)
{
int c;
unsigned int lines = 0;
unsigned long bytes = 0;
int suffix = 2;
char *end;
while ((c = getopt(argc, argv, "l:a:b:")) != -1) {
switch (c) {
case 'l':
bytes = 0;
lines = strtol(optarg, &end, 10);
if (end != NULL && strlen(end) > 0) {
return 1;
}
break;
case 'a':
suffix = strtol(optarg, &end, 10);
if (end != NULL && strlen(end) > 0)
return 1;
break;
case 'b':
lines = 0;
bytes = strtol(optarg, &end, 10);
if (end != NULL) {
if (!strcmp("k", end)) {
bytes *= K_BYTES;
} else if (!strcmp("m", end)) {
bytes *= M_BYTES;
} else {
return 1;
}
}
break;
default:
return 1;
}
}
if (lines == 0 && bytes == 0) {
lines = 1000;
}
if (optind >= argc) {
split("-", "x", suffix, lines, bytes);
} else if (optind == argc - 1) {
split(argv[optind], "x", suffix, lines, bytes);
} else if (optind == argc - 2) {
split(argv[optind], argv[optind + 1], suffix, lines, bytes);
} else {
return 1;
}
return 0;
}
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