/[pcre]/code/trunk/pcregrep.c
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revision 377 by ph10, Sun Mar 1 12:07:19 2009 UTC revision 378 by ph10, Sun Mar 1 14:13:34 2009 UTC
# Line 71  POSSIBILITY OF SUCH DAMAGE. Line 71  POSSIBILITY OF SUCH DAMAGE.
71  typedef int BOOL;  typedef int BOOL;
72    
73  #define MAX_PATTERN_COUNT 100  #define MAX_PATTERN_COUNT 100
74    #define OFFSET_SIZE 99
75    
76  #if BUFSIZ > 8192  #if BUFSIZ > 8192
77  #define MBUFTHIRD BUFSIZ  #define MBUFTHIRD BUFSIZ
# Line 821  if (after_context > 0 && lastmatchnumber Line 822  if (after_context > 0 && lastmatchnumber
822    
823    
824  /*************************************************  /*************************************************
825    *   Apply patterns to subject till one matches   *
826    *************************************************/
827    
828    /* This function is called to run through all patterns, looking for a match. It
829    is used multiple times for the same subject when colouring is enabled, in order
830    to find all possible matches.
831    
832    Arguments:
833      matchptr    the start of the subject
834      length      the length of the subject to match
835      offsets     the offets vector to fill in
836      mrc         address of where to put the result of pcre_exec()
837    
838    Returns:      TRUE if there was a match
839                  FALSE if there was no match
840                  invert if there was a non-fatal error
841    */
842    
843    static BOOL
844    match_patterns(char *matchptr, size_t length, int *offsets, int *mrc)
845    {
846    int i;
847    for (i = 0; i < pattern_count; i++)
848      {
849      *mrc = pcre_exec(pattern_list[i], hints_list[i], matchptr, length, 0, 0,
850        offsets, OFFSET_SIZE);
851      if (*mrc >= 0) return TRUE;
852      if (*mrc == PCRE_ERROR_NOMATCH) continue;
853      fprintf(stderr, "pcregrep: pcre_exec() error %d while matching ", *mrc);
854      if (pattern_count > 1) fprintf(stderr, "pattern number %d to ", i+1);
855      fprintf(stderr, "this text:\n");
856      fwrite(matchptr, 1, length, stderr);  /* In case binary zero included */
857      fprintf(stderr, "\n");
858      if (error_count == 0 &&
859          (*mrc == PCRE_ERROR_MATCHLIMIT || *mrc == PCRE_ERROR_RECURSIONLIMIT))
860        {
861        fprintf(stderr, "pcregrep: error %d means that a resource limit "
862          "was exceeded\n", *mrc);
863        fprintf(stderr, "pcregrep: check your regex for nested unlimited loops\n");
864        }
865      if (error_count++ > 20)
866        {
867        fprintf(stderr, "pcregrep: too many errors - abandoned\n");
868        exit(2);
869        }
870      return invert;    /* No more matching; don't show the line again */
871      }
872    
873    return FALSE;  /* No match, no errors */
874    }
875    
876    
877    
878    /*************************************************
879  *            Grep an individual file             *  *            Grep an individual file             *
880  *************************************************/  *************************************************/
881    
# Line 853  int linenumber = 1; Line 908  int linenumber = 1;
908  int lastmatchnumber = 0;  int lastmatchnumber = 0;
909  int count = 0;  int count = 0;
910  int filepos = 0;  int filepos = 0;
911  int offsets[99];  int offsets[OFFSET_SIZE];
912  char *lastmatchrestart = NULL;  char *lastmatchrestart = NULL;
913  char buffer[3*MBUFTHIRD];  char buffer[3*MBUFTHIRD];
914  char *ptr = buffer;  char *ptr = buffer;
# Line 909  way, the buffer is shifted left and re-f Line 964  way, the buffer is shifted left and re-f
964    
965  while (ptr < endptr)  while (ptr < endptr)
966    {    {
967    int i, endlinelength;    int endlinelength;
968    int mrc = 0;    int mrc = 0;
969    BOOL match = FALSE;    BOOL match;
970    char *matchptr = ptr;    char *matchptr = ptr;
971    char *t = ptr;    char *t = ptr;
972    size_t length, linelength;    size_t length, linelength;
# Line 919  while (ptr < endptr) Line 974  while (ptr < endptr)
974    /* At this point, ptr is at the start of a line. We need to find the length    /* At this point, ptr is at the start of a line. We need to find the length
975    of the subject string to pass to pcre_exec(). In multiline mode, it is the    of the subject string to pass to pcre_exec(). In multiline mode, it is the
976    length remainder of the data in the buffer. Otherwise, it is the length of    length remainder of the data in the buffer. Otherwise, it is the length of
977    the next line. After matching, we always advance by the length of the next    the next line, excluding the terminating newline. After matching, we always
978    line. In multiline mode the PCRE_FIRSTLINE option is used for compiling, so    advance by the length of the next line. In multiline mode the PCRE_FIRSTLINE
979    that any match is constrained to be in the first line. */    option is used for compiling, so that any match is constrained to be in the
980      first line. */
981    
982    t = end_of_line(t, endptr, &endlinelength);    t = end_of_line(t, endptr, &endlinelength);
983    linelength = t - ptr - endlinelength;    linelength = t - ptr - endlinelength;
# Line 936  while (ptr < endptr) Line 992  while (ptr < endptr)
992        #include <time.h>        #include <time.h>
993        struct timeval start_time, end_time;        struct timeval start_time, end_time;
994        struct timezone dummy;        struct timezone dummy;
995          int i;
996    
997        if (jfriedl_XT)        if (jfriedl_XT)
998        {        {
# Line 961  while (ptr < endptr) Line 1018  while (ptr < endptr)
1018    
1019    
1020        for (i = 0; i < jfriedl_XR; i++)        for (i = 0; i < jfriedl_XR; i++)
1021            match = (pcre_exec(pattern_list[0], hints_list[0], ptr, length, 0, 0, offsets, 99) >= 0);            match = (pcre_exec(pattern_list[0], hints_list[0], ptr, length, 0, 0, offsets, OFFSET_SIZE) >= 0);
1022    
1023        if (gettimeofday(&end_time, &dummy) != 0)        if (gettimeofday(&end_time, &dummy) != 0)
1024                perror("bad gettimeofday");                perror("bad gettimeofday");
# Line 980  while (ptr < endptr) Line 1037  while (ptr < endptr)
1037    
1038    ONLY_MATCHING_RESTART:    ONLY_MATCHING_RESTART:
1039    
1040    /* Run through all the patterns until one matches. Note that we don't include    /* Run through all the patterns until one matches or there is an error other
1041    the final newline in the subject string. */    than NOMATCH. This code is in a subroutine so that it can be re-used for
1042      finding subsequent matches when colouring matched lines. */
1043    for (i = 0; i < pattern_count; i++)  
1044      {    match = match_patterns(matchptr, length, offsets, &mrc);
     mrc = pcre_exec(pattern_list[i], hints_list[i], matchptr, length, 0, 0,  
       offsets, 99);  
     if (mrc >= 0) { match = TRUE; break; }  
     if (mrc != PCRE_ERROR_NOMATCH)  
       {  
       fprintf(stderr, "pcregrep: pcre_exec() error %d while matching ", mrc);  
       if (pattern_count > 1) fprintf(stderr, "pattern number %d to ", i+1);  
       fprintf(stderr, "this line:\n");  
       fwrite(matchptr, 1, linelength, stderr);  /* In case binary zero included */  
       fprintf(stderr, "\n");  
       if (error_count == 0 &&  
           (mrc == PCRE_ERROR_MATCHLIMIT || mrc == PCRE_ERROR_RECURSIONLIMIT))  
         {  
         fprintf(stderr, "pcregrep: error %d means that a resource limit "  
           "was exceeded\n", mrc);  
         fprintf(stderr, "pcregrep: check your regex for nested unlimited loops\n");  
         }  
       if (error_count++ > 20)  
         {  
         fprintf(stderr, "pcregrep: too many errors - abandoned\n");  
         exit(2);  
         }  
       match = invert;    /* No more matching; don't show the line again */  
       break;  
       }  
     }  
1045    
1046    /* If it's a match or a not-match (as required), do what's wanted. */    /* If it's a match or a not-match (as required), do what's wanted. */
1047    
# Line 1201  while (ptr < endptr) Line 1232  while (ptr < endptr)
1232        else        else
1233  #endif  #endif
1234    
1235        /* We have to split the line(s) up if colouring. */        /* We have to split the line(s) up if colouring, and search for further
1236          matches. */
1237    
1238        if (do_colour)        if (do_colour)
1239          {          {
1240            int last_offset = 0;
1241          fwrite(ptr, 1, offsets[0], stdout);          fwrite(ptr, 1, offsets[0], stdout);
1242          fprintf(stdout, "%c[%sm", 0x1b, colour_string);          fprintf(stdout, "%c[%sm", 0x1b, colour_string);
1243          fwrite(ptr + offsets[0], 1, offsets[1] - offsets[0], stdout);          fwrite(ptr + offsets[0], 1, offsets[1] - offsets[0], stdout);
1244          fprintf(stdout, "%c[00m", 0x1b);          fprintf(stdout, "%c[00m", 0x1b);
1245          fwrite(ptr + offsets[1], 1, (linelength + endlinelength) - offsets[1],          for (;;)
1246              {
1247              last_offset += offsets[1];
1248              matchptr += offsets[1];
1249              length -= offsets[1];
1250              if (!match_patterns(matchptr, length, offsets, &mrc)) break;
1251              fwrite(matchptr, 1, offsets[0], stdout);
1252              fprintf(stdout, "%c[%sm", 0x1b, colour_string);
1253              fwrite(matchptr + offsets[0], 1, offsets[1] - offsets[0], stdout);
1254              fprintf(stdout, "%c[00m", 0x1b);
1255              }
1256            fwrite(ptr + last_offset, 1, (linelength + endlinelength) - last_offset,
1257            stdout);            stdout);
1258          }          }
1259    
1260          /* Not colouring; no need to search for further matches */
1261    
1262        else fwrite(ptr, 1, linelength + endlinelength, stdout);        else fwrite(ptr, 1, linelength + endlinelength, stdout);
1263        }        }
1264    
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