141 lines
2.2 KiB
C
141 lines
2.2 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <ctype.h>
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#include <limits.h>
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#include "util.h"
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static int itostr(char *, int, int);
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static FILE *nextfile(FILE *, char *, int, int);
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static void
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usage(void)
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{
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eprintf("usage: split [-d] [-a len] [-b [bytes[k|m|g]]] [-l [lines]] [input [prefix]]\n");
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}
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static int base = 26, start = 'a';
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int
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main(int argc, char *argv[])
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{
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int plen, slen = 2;
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int ch;
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char name[NAME_MAX+1];
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char *prefix = "x";
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char *file = NULL;
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char *tmp, *end;
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uint64_t size = 1000, scale = 1, n;
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int always = 0;
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FILE *in = stdin, *out = NULL;
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ARGBEGIN {
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case 'b':
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always = 1;
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tmp = ARGF();
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if(tmp == NULL)
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break;
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size = strtoull(tmp, &end, 10);
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if(*end == '\0')
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break;
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switch(toupper((int)*end)) {
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case 'K':
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scale = 1024;
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break;
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case 'M':
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scale = 1024L * 1024L;
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break;
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case 'G':
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scale = 1024L * 1024L * 1024L;
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break;
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default:
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usage();
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}
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if(size > (UINT64_MAX/scale))
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eprintf("'%s': out of range\n", tmp);
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size *= scale;
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break;
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case 'l':
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always = 0;
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tmp = ARGF();
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if(tmp)
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size = estrtol(tmp, 10);
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break;
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case 'a':
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slen = estrtol(EARGF(usage()), 10);
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break;
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case 'd':
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base = 10;
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start = '0';
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break;
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default:
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usage();
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} ARGEND;
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if(*argv)
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file = *argv++;
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if(*argv)
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prefix = *argv++;
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if(*argv)
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usage();
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plen = strlen(prefix);
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if(plen+slen > NAME_MAX)
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eprintf("names cannot exceed %d bytes\n", NAME_MAX);
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strlcpy(name, prefix, sizeof(name));
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if(file && strcmp(file, "-") != 0) {
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in = fopen(file, "r");
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if(!in)
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eprintf("'%s':", file);
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}
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Nextfile:
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while((out = nextfile(out, name, plen, slen))) {
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n = 0;
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while((ch = getc(in)) != EOF) {
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putc(ch, out);
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n += (always || ch == '\n');
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if(n >= size)
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goto Nextfile;
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}
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fclose(out);
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break;
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}
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return 0;
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}
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int
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itostr(char *str, int x, int n)
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{
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str[n] = '\0';
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while(n-- > 0) {
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str[n] = start + (x % base);
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x /= base;
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}
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if(x)
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return -1;
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return 0;
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}
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FILE *
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nextfile(FILE *f, char *buf, int plen, int slen)
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{
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static int n = 0;
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int s;
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if(f)
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fclose(f);
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s = itostr(buf+plen, n++, slen);
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if(s == -1)
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return NULL;
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f = fopen(buf, "w");
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if(!f)
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eprintf("'%s':", buf);
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return f;
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}
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