Add exec and man

1 files changed, 145 insertions, 0 deletions

diff --git a/main.c b/main.c
new file mode 100644
index 0000000..4b03e38
--- /dev/null
+++ b/main.c
@@ -0,0 +1,145 @@
+
+/**
+ * `main.c' - libbeaufort
+ *
+ * copyright (c) 2014 joseph werle <joseph.werle@gmail.com>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <inttypes.h>
+#include "murmurhash.h"
+
+static void
+usage () {
+  fprintf(stderr, "usage: murmur [-hV] [options]\n");
+}
+
+static void
+help () {
+  fprintf(stderr, "\noptions:\n");
+  fprintf(stderr, "\n  --seed=[seed]  hash seed (optional)");
+  fprintf(stderr, "\n");
+}
+
+static char *
+read_stdin () {
+  size_t bsize = 1024;
+  size_t size = 1;
+  char buf[bsize];
+  char *res = (char *) malloc(sizeof(char) * bsize);
+  char *tmp = NULL;
+
+  // memory issue
+  if (NULL == res) { return NULL; }
+
+  // cap
+  res[0] = '\0';
+
+  // read
+  if (NULL != fgets(buf, bsize, stdin)) {
+    // store
+    tmp = res;
+    // resize
+    size += (size_t) strlen(buf);
+    // realloc
+    res = (char *) realloc(res, size);
+
+    // memory issues
+    if (NULL == res) {
+      free(tmp);
+      return NULL;
+    }
+
+    // yield
+    strcat(res, buf);
+
+    return res;
+  }
+
+  free(res);
+
+  return NULL;
+}
+
+#define isopt(opt, str) (0 == strncmp(opt, str, strlen(str)))
+
+#define setopt(opt, key, var) {                       \
+    char tmp = 0;                                     \
+    size_t len = strlen(key) + 1;                     \
+    for (int i = 0; i < len; ++i) { tmp = *opt++; }   \
+    var = opt;                                        \
+}
+
+int
+main (int argc, char **argv) {
+  char *buf = NULL;
+  char *key = NULL;
+  char *seed = NULL;
+  uint32_t h = 0;
+
+  // parse opts
+  {
+    char *opt = NULL;
+    char tmp = 0;
+
+    opt = *argv++; // unused
+
+    while ((opt = *argv++)) {
+
+      // flags
+      if ('-' == *opt++) {
+        switch (*opt++) {
+          case 'h':
+            return usage(), help(), 0;
+
+          case 'V':
+            fprintf(stderr, "%s\n", MURMURHASH_VERSION);
+            return 0;
+
+          case '-':
+            if (isopt(opt, "seed")) {
+              setopt(opt, "seed", seed);
+            }
+            break;
+
+          default:
+            tmp = *opt--;
+            // error
+            fprintf(stderr, "unknown option: `%s'\n", opt);
+            usage();
+            return 1;
+        }
+      }
+    }
+  }
+
+  if (NULL == seed) {
+    seed = "0";
+  }
+
+#define hash(key) murmurhash(key, (uint32_t) strlen(key), (uint32_t) atoi(seed));
+
+  if (1 == isatty(0)) { return 1; }
+  else if (ferror(stdin)) { return 1; }
+  else {
+    buf = read_stdin();
+    if (NULL == buf) { return 1; }
+    else if (0 == strlen(buf)) { buf = ""; }
+    h = hash(buf);
+    printf("%" PRIu32 "\n", h);
+    do {
+      key = read_stdin();
+      if (NULL == key) { break; }
+      else if (0 == strlen(buf)) { buf = ""; }
+      h = hash(buf);
+      printf("%d" PRIu32 "\n", h);
+    } while (NULL != key);
+  }
+
+#undef hash
+
+  return 0;
+}