* sampler.c : use getopt()

src/sampler.c

@@ -3,45 +3,94 @@
 #include "bitmap.h"
 #include "sample.h"
 
-void usage() {
-  puts("Usage: imdb-sample <db path> <id> <sample path>");
-  exit(EXIT_FAILURE);
+#include <getopt.h>
+
+void usage(int exitcode) {
+  puts(
+"Usage: imdb-write <opts>\n"
+"  -b <path>   Path to database\n"
+);
+puts(
+"  -A <num>,<path>  Add sample from 'path' as record 'num'\n"
+"  -D <num>         Delete record <num>\n"
+);
+  exit(exitcode);
 }
 
 int main(int argc, char **argv)
 {
+  enum { undef, add, del } mode = undef;
+  char opt;
+  const char *db_path = NULL;
+  const char *sample = NULL;
+  const char *c = NULL;
   imdb_db_t  db;
   imdb_rec_t rec;
 
   memset(&db,  0x0, sizeof(imdb_db_t));
   memset(&rec, 0x0, sizeof(imdb_rec_t));
 
-  if (argc < 4)
-    usage();
-
-  rec.num = strtoll(argv[2], NULL, 10);
-  if (errno != 0) {
-    puts("arg 1 not a number");
-    usage();
-  }
+  if (argc < 3)
+    usage(EXIT_FAILURE);
 
-  if (imdb_open(&db, argv[1], 1) != 0) {
-    puts(db.errstr);
-    usage();
+  while ((opt = getopt(argc, argv, "b:A:D:")) != -1) {
+    switch (opt) {
+      case 'b' :
+        db_path = optarg;
+        break;
+      case 'h' :
+        usage(EXIT_SUCCESS);
+        break;
+      case 'A' :
+        mode = add;
+        if ((c = strchr(optarg, ',')) == NULL)
+          usage(EXIT_FAILURE);
+        rec.num = atoll(optarg);
+        sample  = c + 1;
+        break;
+      case 'D' :
+        mode = del;
+        rec.num = atoll(optarg);
+        break;
+      default :
+        usage(EXIT_FAILURE);
+        break;
+    }
   }
 
-  if (imdb_sample(&rec, argv[3]) != 0) {
-    puts("sampler failure");
-    usage();
-  }
+  if (db_path == NULL)
+    usage(EXIT_FAILURE);
 
-  if(imdb_write_rec(&db, &rec) < 1) {
+  if (imdb_open(&db, db_path, 1) != 0) {
     puts(db.errstr);
-    usage();
+    exit(EXIT_FAILURE);
   }
 
+  switch (mode) {
+    case add :
+      if (rec.num == 0 || sample == NULL)
+        usage(EXIT_FAILURE);
+      if (imdb_sample(&rec, sample) != 0) {
+        puts("sampler failure");
+        exit(EXIT_FAILURE);
+      }
+      if (imdb_write_rec(&db, &rec) < 1) {
+        puts(db.errstr);
+        exit(EXIT_FAILURE);
+      }
+      bitmap_print(&rec.data[REC_OFF_BM]);
+      break;
+    case del :
+      if (imdb_write_rec(&db, &rec) < 1) {
+        puts(db.errstr);
+        exit(EXIT_FAILURE);
+      }
+      break;
+    default:
+      usage(EXIT_FAILURE);
+      break;
+  }
   imdb_close(&db);
-  bitmap_print(&rec.data[REC_OFF_BM]);
 
   exit(EXIT_SUCCESS);
 }