X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs2.git;a=blobdiff_plain;f=linux-tests%2Fverifybigsparse.c;fp=linux-tests%2Fverifybigsparse.c;h=84ff53b690bec4ebd10f20cc1b36902c4221f3d7;hp=0000000000000000000000000000000000000000;hb=236044674b17ac4455b44cb4bdb0ea99107d9a99;hpb=0ed6086affa15e1537da1b16d2ab3af654713a15

diff --git a/linux-tests/verifybigsparse.c b/linux-tests/verifybigsparse.c
new file mode 100644
index 0000000..84ff53b
--- /dev/null
+++ b/linux-tests/verifybigsparse.c
@@ -0,0 +1,110 @@
+#define _LARGEFILE64_SOURCE
+#include<stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+#define N_WRITES 2000
+#define STRIDE	 2000
+
+#define BUFFER_N 1100
+unsigned  xxbuffer[BUFFER_N];
+
+
+void set_buffer(int n)
+{
+	int i;
+	for(i = 0; i < BUFFER_N; i++)
+		xxbuffer[i] = i + n;
+}
+
+
+void verify_big_sparse_file(int h)
+{
+	unsigned check_buffer[BUFFER_N];
+	int i;
+	loff_t offset = 0;
+	loff_t pos;
+	int n = sizeof(check_buffer);
+	int result;
+	const char * check_type;
+	int checks_failed = 0;
+	int checks_passed = 0;
+
+	for(i = 0; i < N_WRITES * STRIDE; i++) {
+		if(i % STRIDE) {
+			check_type = "zero";
+			memset(xxbuffer,0, n);
+		} else {
+			check_type = "buffer";
+			set_buffer(i/STRIDE);
+		}
+		printf("%s checking %lld\n", check_type, offset);
+		pos = lseek64(h, offset, SEEK_SET);
+		if(pos != offset) {
+			printf("mismatched seek pos %lld offset %lld\n",
+				pos, offset);
+			perror("lseek64");
+			exit(1);
+		}
+		result = read(h, check_buffer, n);
+
+		if(result != n) {
+			printf("mismatched read result %d n %d\n", result, n);
+			exit(1);
+		}
+
+
+
+
+		if(memcmp(xxbuffer, check_buffer, n)) {
+			int j;
+
+			printf("buffer at %lld mismatches\n", pos);
+			printf("xxbuffer ");
+			for(j = 0; j < 20; j++)
+				printf(" %d",xxbuffer[j]);
+			printf("\n");
+			printf("check_buffer ");
+			for(j = 0; j < 20; j++)
+				printf(" %d",check_buffer[j]);
+			printf("\n");
+
+			checks_failed++;
+		} else {
+			checks_passed++;
+		}
+
+		offset += sizeof(xxbuffer);
+	}
+
+	printf("%d checks passed, %d checks failed\n", checks_passed, checks_failed);
+
+}
+
+
+int main(int argc, char *argv[])
+{
+	int handle;
+
+	if(argc < 2) {
+		printf("Gimme a file name!\n");
+		exit(1);
+	}
+
+	handle = open(argv[1], O_CREAT | O_RDWR | O_TRUNC, S_IREAD | S_IWRITE);
+
+	if(handle < 0) {
+		perror("opening file");
+		exit(1);
+	}
+
+	verify_big_sparse_file(handle);
+
+	printf("Job done\n");
+	return 0;
+}