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authorDenis Vlasenko2007-04-07 00:45:27 +0000
committerDenis Vlasenko2007-04-07 00:45:27 +0000
commitbb5b01c7c711dd9ffc2abf23a05ccdfbf7fc0325 (patch)
treebc45e2297786ead1aec3836fad2ade137c01bf96 /coreutils/comm.c
parent04c99ebb4f59d784d8bceaad86cb6227c1babd17 (diff)
downloadbusybox-bb5b01c7c711dd9ffc2abf23a05ccdfbf7fc0325.zip
busybox-bb5b01c7c711dd9ffc2abf23a05ccdfbf7fc0325.tar.gz
comm: eliminate statics
Diffstat (limited to 'coreutils/comm.c')
-rw-r--r--coreutils/comm.c74
1 files changed, 30 insertions, 44 deletions
diff --git a/coreutils/comm.c b/coreutils/comm.c
index b641296..28e3982 100644
--- a/coreutils/comm.c
+++ b/coreutils/comm.c
@@ -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)
}
}
- 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);
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ fclose(streams[0]);
+ fclose(streams[1]);
+ }
- cmp_files(argv + optind);
- exit(EXIT_SUCCESS);
+ return EXIT_SUCCESS;
}