diff options
| -rw-r--r-- | coreutils/comm.c | 74 |
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; } |