From f1625eb89d3f4f63873396c23400276ece039218 Mon Sep 17 00:00:00 2001
From: cpg <cpg@b7a2c559-68d2-44c3-8de9-860c34a00d81>
Date: Thu, 23 May 2002 21:58:36 +0000
Subject: [PATCH] initial check-in

git-svn-id: svn://svn.cc65.org/cc65/trunk@1285 b7a2c559-68d2-44c3-8de9-860c34a00d81
---
 testcode/lib/seek.c | 179 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 179 insertions(+)
 create mode 100644 testcode/lib/seek.c

diff --git a/testcode/lib/seek.c b/testcode/lib/seek.c
new file mode 100644
index 000000000..f04e88b4e
--- /dev/null
+++ b/testcode/lib/seek.c
@@ -0,0 +1,179 @@
+/*
+ * seek test program
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+
+int main(int argc, char **argv)
+{
+    char *filename,*x;
+    char buf[20];
+    FILE *file;
+    long pos;
+    off_t fsz;
+    int fd;
+
+    if (argc <= 1) {
+        printf("\nfilename: ");
+        x = fgets(buf,19,stdin);
+        printf("\n");
+        if (!x) {
+            return(0);
+        }
+        filename = x;
+    }
+    else {
+        filename = *(argv+1);
+    }
+
+    file = fopen(filename,"rb");
+    if (!file) {
+        fprintf(stderr,"cannot open %s: %s\n",filename,strerror(errno));
+        return(1);
+    }
+
+    if (fread(buf, 10, 1, file) != 1) {
+        fprintf(stderr,"short read, aborted\n");
+        fclose(file);
+        return(1);
+    }
+
+    pos = ftell(file);
+    if (pos == -1) {
+        fprintf(stderr,"ftell returned -1: %s\n", strerror(errno));
+        fclose(file);
+        return(1);
+    }
+
+    printf("reading 10 bytes from file\n");
+    printf("current file pos: %ld\n", pos);
+
+    printf("get file size (lseek): ");
+    fd = *(char *)file;   /* kids, don't do this at home */
+    fsz = lseek(fd, 0, SEEK_END);
+    if (fsz == -1) {
+        fprintf(stderr,"lseek returned -1: %s\n", strerror(errno));
+        fclose(file);
+        return(1);
+    }
+    printf("%ld (fd = %d)\n", (long)fsz, fd);
+
+    printf("get file size (fseek): ");
+    pos = fseek(file, 0, SEEK_END);
+    if (pos != 0) {
+        fprintf(stderr,"fseek returned -1: %s\n", strerror(errno));
+        fclose(file);
+        return(1);
+    }
+
+    pos = ftell(file);
+    if (pos == -1) {
+        fprintf(stderr,"ftell returned -1: %s\n", strerror(errno));
+        fclose(file);
+        return(1);
+    }
+    printf("%ld\n",pos);
+
+    printf("positioning at offset 100: ");
+    pos = fseek(file, 100, SEEK_SET);
+    if (pos != 0) {
+        fprintf(stderr,"fseek returned -1: %s\n", strerror(errno));
+        fclose(file);
+        return(1);
+    }
+    pos = ftell(file);
+    if (pos == -1) {
+        fprintf(stderr,"ftell returned -1: %s\n", strerror(errno));
+        fclose(file);
+        return(1);
+    }
+    if (pos == 100) {
+        printf("Ok\n");
+    }
+    else {
+        printf("failed! cur pos = %ld\n",pos);
+        fclose(file);
+        return(1);
+    }
+
+    printf("seeking back 44 bytes: ");
+    pos = fseek(file, -44, SEEK_CUR);
+    if (pos != 0) {
+        fprintf(stderr,"fseek returned -1: %s\n", strerror(errno));
+        fclose(file);
+        return(1);
+    }
+    pos = ftell(file);
+    if (pos == -1) {
+        fprintf(stderr,"ftell returned -1: %s\n", strerror(errno));
+        fclose(file);
+        return(1);
+    }
+    if (pos == 56) {
+        printf("Ok\n");
+    }
+    else {
+        printf("failed! cur pos = %ld\n",pos);
+        fclose(file);
+        return(1);
+    }
+
+    printf("seeking forward 111 bytes: ");
+    pos = fseek(file, 111, SEEK_CUR);
+    if (pos != 0) {
+        fprintf(stderr,"fseek returned -1: %s\n", strerror(errno));
+        fclose(file);
+        return(1);
+    }
+    pos = ftell(file);
+    if (pos == -1) {
+        fprintf(stderr,"ftell returned -1: %s\n", strerror(errno));
+        fclose(file);
+        return(1);
+    }
+    if (pos == 167) {
+        printf("Ok\n");
+    }
+    else {
+        printf("failed! cur pos = %ld\n",pos);
+        fclose(file);
+        return(1);
+    }
+
+    printf("seeking 13 bytes before eof: ");
+    pos = fseek(file, -13, SEEK_END);
+    if (pos != 0) {
+        fprintf(stderr,"fseek returned -1: %s\n", strerror(errno));
+        fclose(file);
+        return(1);
+    }
+    pos = ftell(file);
+    if (pos == -1) {
+        fprintf(stderr,"ftell returned -1: %s\n", strerror(errno));
+        fclose(file);
+        return(1);
+    }
+    if (pos == fsz - 13) {
+        printf("Ok\n");
+    }
+    else {
+        printf("failed! cur pos = %ld\n",pos);
+        fclose(file);
+        return(1);
+    }
+
+    printf("seeking before sof:\n\t");
+    pos = fseek(file, -fsz, SEEK_CUR);
+    if (pos != 0) {
+        printf("Ok, error %s\n", strerror(errno));
+    }
+    else {
+        printf("NOT OK, no error\n");
+    }
+
+    fclose(file);
+    return(0);
+}