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Changes On Branch ambiguous_cmd_fix
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Changes In Branch ambiguous_cmd_fix Excluding Merge-Ins

This is equivalent to a diff from 959807e915 to bb5162fe16

2022-04-06
16:42
Minor consistency fix about ambiguous sub-command dispatch and error reporting, see related [forum:/forumpost/48d6de4f8e2afdde|forum post]. ... (check-in: 512905efd3 user: mgagnon tags: trunk)
2022-04-05
19:51
When reporting the list of matching ambiguous sub-commands, make sure settings with the same prefix are not listed. ... (Closed-Leaf check-in: bb5162fe16 user: mgagnon tags: ambiguous_cmd_fix)
16:49
Don't give an "ambiguous command prefix" error when reported ambiguous commands are aliases to each others. Assume alias point to same function pointer and are all consecutive in the aCommand[] list. ... (check-in: 862ce7ce2c user: mgagnon tags: ambiguous_cmd_fix)
15:04
Modify the makefiles to provide for compile-time options for pikchr. Reduce the token-count limit in pikchr to 10,000. ... (check-in: 959807e915 user: drh tags: trunk)
14:41
Update to the latest Pikchr version that includes improved resistance to exponential macro-expansion attacks. ... (check-in: f753041961 user: drh tags: trunk)

Changes to src/dispatch.c.
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     * exactly one entry with this prefix and the requested type. */
    for( mid=-1; lwr<MX_COMMAND
              && strncmp(zName, aCommand[lwr].zName, nName)==0; ++lwr ){
      if( aCommand[lwr].eCmdFlags & eType ){
        if( mid<0 ){
          mid = lwr;  /* Potential ambiguous prefix */
        }else{
          if( aCommand[lwr].xFunc != aCommand[mid].xFunc ){
          return 2;  /* Confirmed ambiguous prefix */
            return 2;  /* Confirmed ambiguous prefix */
          }
        }
      }
    }
    if( mid>=0 ){
      *ppCmd = &aCommand[mid];
      return 0;  /* Prefix match */
    }
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    }
  }
  return 0;
}

/*
** Fill Blob with a space-separated list of all command names that
** match the prefix zPrefix.
** match the prefix zPrefix and the eType CMDFLAGS_ bits.
*/
void dispatch_matching_names(const char *zPrefix, Blob *pList){
void dispatch_matching_names(
  const char *zPrefix,        /* name prefix */
  unsigned eType,             /* CMDFLAG_ bits */
  Blob *pList                 /* space-separated list of command names */
){
  int i;
  int nPrefix = (int)strlen(zPrefix);
  for(i=FOSSIL_FIRST_CMD; i<MX_COMMAND; i++){
    if( (aCommand[i].eCmdFlags & eType)==0 ) continue;
    if( strncmp(zPrefix, aCommand[i].zName, nPrefix)==0 ){
      blob_appendf(pList, " %s", aCommand[i].zName);
    }
  }
}

/*
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Changes to src/main.c.
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      }
    }
    fossil_exit(0);
#endif
  }else if( rc==2 ){
    Blob couldbe;
    blob_init(&couldbe,0,0);
    dispatch_matching_names(zCmdName, &couldbe);
    dispatch_matching_names(zCmdName, CMDFLAG_COMMAND, &couldbe);
    fossil_print("%s: ambiguous command prefix: %s\n"
                 "%s: could be any of:%s\n"
                 "%s: use \"help\" for more information\n",
                 g.argv[0], zCmdName, g.argv[0], blob_str(&couldbe), g.argv[0]);
    fossil_exit(1);
  }
#ifdef FOSSIL_ENABLE_JSON
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