fast simple dictionary generator

2 files changed, 104 insertions, 0 deletions

diff --git a/empty b/empty
deleted file mode 100644
index e69de29..0000000
--- a/empty
+++ /dev/null
diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..a04b0db
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,104 @@
+#include <unistd.h>
+#include <stdio.h>
+#include <iconv.h>
+#include <string.h>
+#include <errno.h>
+#include <stdlib.h>
+
+int main(int argc, char **argv)
+{
+        int opt = -1, min_len = 0, max_len = 0;
+        char ofile[256], fchar[2], tchar[2];
+        ofile[0] = 0;
+        fchar[0] = 0;
+        tchar[0] = 0;
+        while((opt = getopt(argc, argv, "o:f:t:l:L:")) != -1)
+        {
+                switch(opt)
+                {
+                        case 'o':
+                        strncpy(ofile, optarg, 255);
+                        break;
+                        case 'f':
+                        strncpy(fchar, optarg, 1);
+                        break;
+                        case 't':
+                        strncpy(tchar, optarg, 1);
+						break;
+						case 'l':
+						min_len = atoi(optarg);
+                        break;
+						case 'L':
+						max_len = atoi(optarg);
+						break;
+                        default:
+                        printf("usage: %s -oftlL\n\t-o output file\n\t-f from char\n\t-t to char\n\t-l min seq len\n\t-L max seq len", argv[0]);
+                }
+        }
+	if(max_len < 1)
+	{
+		printf("error, length must be more than 0\n");
+		return 1;
+	}
+	if(min_len > max_len)
+	{
+		printf("error, max length must be greater or equal min_length\n");
+		return 1;
+	}
+	if((int)fchar[0] > (int)tchar[0])
+	{
+		printf("error, invalid range specified\n");
+		return 1;
+	}
+	FILE *out = fopen(ofile, "w");
+	if(!out)
+	{
+		printf("failed to open input file with error: %s\n", strerror(errno));
+		return 1;
+	}
+	int cur_len = min_len;
+	while(cur_len <= max_len)
+	{
+		char buf[cur_len];
+		for(int i = 0; i < cur_len; i++)
+			buf[i] = fchar[0];
+		fwrite(buf, cur_len, 1, out);
+		fwrite("\n", 1, 1, out);
+		while(buf[0] != (tchar[0]+1))
+		{
+			while(buf[cur_len-1] < tchar[0])
+			{
+				(int)buf[cur_len-1]++;
+				fwrite(buf, cur_len, 1, out);
+				fwrite("\n", 1, 1, out);
+			}
+			if(cur_len < 2)
+				break;
+			if(buf[0] == tchar[0])
+			{
+				bool stop = true;
+				for(int i = 1; i < cur_len; i++)
+				{
+					if(buf[i] != tchar[0])
+					{
+						stop = false;
+						break;
+					}
+				}
+				if(stop)
+					break;
+			}
+			int u = cur_len-2;
+			for(; u>=0 && buf[u] >= tchar[0]; u--)
+				;
+			(int)buf[u]++;
+			for(int i = u+1; i < cur_len; i++)
+				buf[i] = fchar[0];
+			fwrite(buf, cur_len, 1, out);
+			fwrite("\n", 1, 1, out);
+		}
+		cur_len++;
+	}
+	fclose(out);
+	return 0;
+}