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comm: eliminate statics

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This commit is contained in:
Denis Vlasenko 2007-04-07 00:45:27 +00:00
parent 04c99ebb4f
commit bb5b01c7c7
1 changed files with 31 additions and 45 deletions
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68
coreutils/comm.c
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@ -9,41 +9,34 @@
#include "busybox.h"
#define COMM_OPT_1 0x01
#define COMM_OPT_2 0x02
#define COMM_OPT_3 0x04
/* These three variables control behaviour if non-zero */
static int only_file_1;
static int only_file_2;
static int both;
#define COMM_OPT_1 (1 << 0)
#define COMM_OPT_2 (1 << 1)
#define COMM_OPT_3 (1 << 2)
/* writeline outputs the input given, appropriately aligned according to class */
static void writeline(char *line, int class)
static void writeline(char *line, int class, int flags)
{
if (class == 0) {
if (!only_file_1)
if (flags & COMM_OPT_1)
return;
} else if (class == 1) {
if (!only_file_2)
if (flags & COMM_OPT_2)
return;
if (only_file_1)
if (!(flags & COMM_OPT_1))
putchar('\t');
}
else /*if (class == 2)*/ {
if (!both)
} else /*if (class == 2)*/ {
if (flags & COMM_OPT_3)
return;
if (only_file_1)
if (!(flags & COMM_OPT_1))
putchar('\t');
if (only_file_2)
if (!(flags & COMM_OPT_2))
putchar('\t');
}
fputs(line, stdout);
}
/* This is the real core of the program - lines are compared here */
static void cmp_files(char **infiles)
int comm_main(int argc, char **argv);
int comm_main(int argc, char **argv)
{
#define LINE_LEN 100
#define BB_EOF_0 0x1
@ -51,12 +44,19 @@ static void cmp_files(char **infiles)
char thisline[2][LINE_LEN];
FILE *streams[2];
int i;
unsigned flags;
opt_complementary = "=2";
flags = getopt32(argc, argv, "123");
argv += optind;
for (i = 0; i < 2; ++i) {
streams[i] = ((infiles[i][0] == '=' && infiles[i][1]) ? stdin : xfopen(infiles[i], "r"));
streams[i] = (argv[i][0] == '-' && !argv[i][1]) ? stdin : xfopen(argv[i], "r");
fgets(thisline[i], LINE_LEN, streams[i]);
}
/* This is the real core of the program - lines are compared here */
while (*thisline[0] || *thisline[1]) {
int order = 0;
@ -78,11 +78,11 @@ static void cmp_files(char **infiles)
}
if (order == 0 && !i)
writeline(thisline[1], 2);
writeline(thisline[1], 2, flags);
else if (order > 0 && !(i & BB_EOF_1))
writeline(thisline[1], 1);
writeline(thisline[1], 1, flags);
else if (order < 0 && !(i & BB_EOF_0))
writeline(thisline[0], 0);
writeline(thisline[0], 0, flags);
if (i & BB_EOF_0 & BB_EOF_1) {
break;
@ -91,7 +91,7 @@ static void cmp_files(char **infiles)
i = (i & BB_EOF_0 ? 1 : 0);
while (!feof(streams[i])) {
if ((order < 0 && i) || (order > 0 && !i))
writeline(thisline[i], i);
writeline(thisline[i], i, flags);
fgets(thisline[i], LINE_LEN, streams[i]);
}
break;
@ -104,24 +104,10 @@ static void cmp_files(char **infiles)
}
}
if (ENABLE_FEATURE_CLEAN_UP) {
fclose(streams[0]);
fclose(streams[1]);
}
int comm_main(int argc, char **argv);
int comm_main(int argc, char **argv)
{
unsigned long flags;
flags = getopt32(argc, argv, "123");
if (optind + 2 != argc)
bb_show_usage();
only_file_1 = !(flags & COMM_OPT_1);
only_file_2 = !(flags & COMM_OPT_2);
both = !(flags & COMM_OPT_3);
cmp_files(argv + optind);
exit(EXIT_SUCCESS);
return EXIT_SUCCESS;
}