Fixed bug #668: save command line history for yaz-client. The history

[yaz-moved-to-github.git] / client / fhistory.c

diff --git a/client/fhistory.c b/client/fhistory.c
new file mode 100644 (file)
index 0000000..0020f76
--- /dev/null
+++ b/client/fhistory.c
@@ -0,0 +1,129 @@
+/* 
+ * Copyright (C) 1995-2007, Index Data ApS
+ * See the file LICENSE for details.
+ *
+ * $Id: fhistory.c,v 1.1 2007-01-24 11:50:18 adam Exp $
+ */
+/** \file fhistory.c
+ *  \brief file history implementation
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <time.h>
+#include <ctype.h>
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#include "fhistory.h"
+
+
+struct file_history {
+    WRBUF wr;
+};
+
+file_history_t file_history_new()
+{
+    file_history_t fh = xmalloc(sizeof(*fh));
+    fh->wr = wrbuf_alloc();
+    return fh;
+}
+
+void file_history_destroy(file_history_t *fhp)
+{
+    if (*fhp)
+    {
+        wrbuf_destroy((*fhp)->wr);
+        xfree(*fhp);
+        *fhp = 0;
+    }
+}
+
+void file_history_add_line(file_history_t fh, const char *line)
+{
+    wrbuf_puts(fh->wr, line);
+    wrbuf_puts(fh->wr, "\n");
+}
+
+int file_history_load(file_history_t fh)
+{
+    FILE *f;
+    char* homedir = getenv("HOME");
+    char fname[1024];
+    int ret = 0;
+
+    wrbuf_rewind(fh->wr);
+    sprintf(fname, "%.500s%s%s", homedir ? homedir : "",
+            homedir ? "/" : "", ".yazclient.history");
+
+    f = fopen(fname, "r");
+    if (f)
+    {
+        int c;
+        while ((c = fgetc(f)) != EOF)
+            wrbuf_putc(fh->wr, c);
+        fclose(f);
+    }
+    return ret;
+}
+
+int file_history_save(file_history_t fh)
+{
+    FILE *f;
+    char* homedir = getenv("HOME");
+    char fname[1024];
+    int ret = 0;
+
+    sprintf(fname, "%.500s%s%s", homedir ? homedir : "",
+            homedir ? "/" : "", ".yazclient.history");
+
+    f = fopen(fname, "w");
+    if (!f)
+    {
+        ret = -1;
+    }
+    else
+    {
+        size_t w = fwrite(wrbuf_buf(fh->wr), 1, wrbuf_len(fh->wr), f);
+        if (w != wrbuf_len(fh->wr))
+            ret = -1;
+        if (fclose(f))
+            ret = -1;
+    }
+    return ret;
+}
+
+int file_history_trav(file_history_t fh, void *client_data,
+                      void (*callback)(void *client_data, const char *line))
+{
+    int off = 0;
+
+    while (off < wrbuf_len(fh->wr))
+    {
+        int i;
+        for (i = off; i < wrbuf_len(fh->wr); i++)
+        {
+            if (wrbuf_buf(fh->wr)[i] == '\n')
+            {
+                wrbuf_buf(fh->wr)[i] = '\0';
+                callback(client_data, wrbuf_buf(fh->wr) + off);
+                wrbuf_buf(fh->wr)[i] = '\n';
+                i++;
+                break;
+            }
+        }
+        off = i;
+    }
+    return 0;
+}
+
+/*
+ * Local variables:
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ * vim: shiftwidth=4 tabstop=8 expandtab
+ */
+