added iconv test code

this code can convert file from one supported by iconv charset to other

1 files changed, 79 insertions, 0 deletions

diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..56d8523
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,79 @@
+#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;
+	char ifile[256], ofile[256], fcharset[32], tcharset[32];
+	ifile[0] = 0;
+	ofile[0] = 0;
+	fcharset[0] = 0;
+	tcharset[0] = 0;
+	while((opt = getopt(argc, argv, "i:o:f:t:")) != -1)
+	{
+		switch(opt)
+		{
+			case 'i':
+			strcpy(ifile, optarg);
+			break;
+			case 'o':
+			strcpy(ofile, optarg);
+			break;
+			case 'f':
+			strcpy(fcharset, optarg);
+			break;
+			case 't':
+			strcpy(tcharset, optarg);
+			break;
+			default:
+			printf("usage: %s -ioft\n\t-i input file\n\t-o output file\n\t-f from charset\n\t-t to charset\n", argv[0]);
+		}
+	}
+	iconv_t id = iconv_open(tcharset, fcharset);
+	if((long)id == -1)
+	{
+		printf("failed to create iconv descriptor with error: %s\n", strerror(errno));
+		return 1;
+	}
+	FILE *in = fopen(ifile, "r");
+	if(!in)
+	{
+		printf("failed to open input file with error: %s\n", strerror(errno));
+		return 1;
+	}
+	FILE *out = fopen(ofile, "w");
+	if(!out)
+	{
+		printf("failed to open input file with error: %s\n", strerror(errno));
+		return 1;
+	}
+	while(!feof(in))
+	{
+		char *buf = (char*)malloc(4096), *outbuf = (char*)malloc(4096), *op, *ip;
+		op = outbuf;
+		ip = buf;
+		if(!fgets(buf, 4096, in))
+			break;
+		size_t len = strlen(buf), outlen = 4096;
+		int enc_len = iconv(id, &ip, &len, &op, &outlen);
+		if(enc_len == -1)
+		{
+			printf("failed to convert buffer with error: %s\n", strerror(errno));
+			return 1;
+		}
+		enc_len = 4096 - outlen;
+		if((int)fwrite(outbuf, 1, enc_len, out) != enc_len)
+		{
+			printf("failed to write data to file with error: %s\n", strerror(errno));
+			return 1;
+		}
+		free(buf);
+		free(outbuf);
+	}
+	return 0;
+}