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    revision 532 by niro, Sat Sep 1 22:45:15 2007 UTC revision 816 by niro, Fri Apr 24 18:33:46 2009 UTC
    # Line 10  Line 10 
    10  /* BB_AUDIT SUSv3 compliant */  /* BB_AUDIT SUSv3 compliant */
    11  /* http://www.opengroup.org/onlinepubs/007904975/utilities/uniq.html */  /* http://www.opengroup.org/onlinepubs/007904975/utilities/uniq.html */
    12    
    13  #include "busybox.h"  #include "libbb.h"
       
     static const char uniq_opts[] = "f:s:" "cdu\0\1\2\4";  
    14    
    15  static FILE *xgetoptfile_uniq_s(char **argv, int read0write2)  static FILE *xgetoptfile_uniq_s(char **argv, int read0write2)
    16  {  {
    17   const char *n;   const char *n;
    18    
    19   if ((n = *argv) != NULL) {   n = *argv;
    20     if (n != NULL) {
    21   if ((*n != '-') || n[1]) {   if ((*n != '-') || n[1]) {
    22   return xfopen(n, "r\0w" + read0write2);   return xfopen(n, "r\0w" + read0write2);
    23   }   }
    # Line 26  static FILE *xgetoptfile_uniq_s(char **a Line 25  static FILE *xgetoptfile_uniq_s(char **a
    25   return (read0write2) ? stdout : stdin;   return (read0write2) ? stdout : stdin;
    26  }  }
    27    
    28  int uniq_main(int argc, char **argv)  int uniq_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
    29    int uniq_main(int argc UNUSED_PARAM, char **argv)
    30  {  {
    31   FILE *in, *out;   FILE *in, *out;
      unsigned long dups, skip_fields, skip_chars, i, uniq_flags;  
    32   const char *s0, *e0, *s1, *e1, *input_filename;   const char *s0, *e0, *s1, *e1, *input_filename;
    33   int opt;   unsigned long dups;
    34     unsigned skip_fields, skip_chars, max_chars;
    35   uniq_flags = skip_fields = skip_chars = 0;   unsigned opt;
    36     unsigned i;
    37   while ((opt = getopt(argc, argv, uniq_opts)) > 0) {  
    38   if ((opt == 'f') || (opt == 's')) {   enum {
    39   unsigned long t = xatoul(optarg);   OPT_c = 0x1,
    40   if (opt == 'f') {   OPT_d = 0x2,
    41   skip_fields = t;   OPT_u = 0x4,
    42   } else {   OPT_f = 0x8,
    43   skip_chars = t;   OPT_s = 0x10,
    44   }   OPT_w = 0x20,
    45   } else if ((s0 = strchr(uniq_opts, opt)) != NULL) {   };
    46   uniq_flags |= s0[4];  
    47   } else {   skip_fields = skip_chars = 0;
    48   bb_show_usage();   max_chars = -1;
    49   }  
    50   }   opt_complementary = "f+:s+:w+";
    51     opt = getopt32(argv, "cduf:s:w:", &skip_fields, &skip_chars, &max_chars);
    52     argv += optind;
    53    
    54   input_filename = *(argv += optind);   input_filename = *argv;
    55    
    56   in = xgetoptfile_uniq_s(argv, 0);   in = xgetoptfile_uniq_s(argv, 0);
    57   if (*argv) {   if (*argv) {
    # Line 61  int uniq_main(int argc, char **argv) Line 62  int uniq_main(int argc, char **argv)
    62   bb_show_usage();   bb_show_usage();
    63   }   }
    64    
    65   s1 = e1 = NULL; /* prime the pump */   s1 = e1 = NULL; /* prime the pump */
    66    
    67   do {   do {
    68   s0 = s1;   s0 = s1;
    # Line 69  int uniq_main(int argc, char **argv) Line 70  int uniq_main(int argc, char **argv)
    70   dups = 0;   dups = 0;
    71    
    72   /* gnu uniq ignores newlines */   /* gnu uniq ignores newlines */
    73   while ((s1 = xmalloc_getline(in)) != NULL) {   while ((s1 = xmalloc_fgetline(in)) != NULL) {
    74   e1 = s1;   e1 = s1;
    75   for (i = skip_fields; i; i--) {   for (i = skip_fields; i; i--) {
    76   e1 = skip_whitespace(e1);   e1 = skip_whitespace(e1);
    77   while (*e1 && !isspace(*e1)) {   e1 = skip_non_whitespace(e1);
      ++e1;  
      }  
    78   }   }
    79   for (i = skip_chars; *e1 && i; i--) {   for (i = skip_chars; *e1 && i; i--) {
    80   ++e1;   ++e1;
    81   }   }
    82    
    83   if (!s0 || strcmp(e0, e1)) {   if (!s0 || strncmp(e0, e1, max_chars)) {
    84   break;   break;
    85   }   }
    86    
    87   ++dups; /* Note: Testing for overflow seems excessive. */   ++dups; /* note: testing for overflow seems excessive. */
    88   }   }
    89    
    90   if (s0) {   if (s0) {
    91   if (!(uniq_flags & (2 << !!dups))) {   if (!(opt & (OPT_d << !!dups))) { /* (if dups, opt & OPT_e) */
    92   fprintf(out, "\0%d " + (uniq_flags & 1), dups + 1);   fprintf(out, "\0%ld " + (opt & 1), dups + 1); /* 1 == OPT_c */
    93   fprintf(out, "%s\n", s0);   fprintf(out, "%s\n", s0);
    94   }   }
    95   free((void *)s0);   free((void *)s0);
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