+/* $Id$
+ * Substantial penalty for early withdrawal.
+ */
+
+#include <unistd.h>
+#include <ruby.h>
+#include <rrd.h>
+
+typedef struct string_arr_t {
+ int len;
+ char **strings;
+} string_arr;
+
+VALUE mRRD;
+VALUE rb_eRRDError;
+
+typedef int (*RRDFUNC)(int argc, char ** argv);
+#define RRD_CHECK_ERROR \
+ if (rrd_test_error()) \
+ rb_raise(rb_eRRDError, rrd_get_error()); \
+ rrd_clear_error();
+
+string_arr string_arr_new(VALUE rb_strings)
+{
+ string_arr a;
+ char buf[64];
+ int i;
+
+ Check_Type(rb_strings, T_ARRAY);
+ a.len = RARRAY(rb_strings)->len + 1;
+
+ a.strings = malloc(a.len * sizeof(char *));
+ a.strings[0] = "dummy"; /* first element is a dummy element */
+
+ for (i = 0; i < a.len - 1; i++) {
+ VALUE v = rb_ary_entry(rb_strings, i);
+ switch (TYPE(v)) {
+ case T_STRING:
+ a.strings[i + 1] = strdup(STR2CSTR(v));
+ break;
+ case T_FIXNUM:
+ snprintf(buf, 63, "%d", FIX2INT(v));
+ a.strings[i + 1] = strdup(buf);
+ break;
+ default:
+ rb_raise(rb_eTypeError, "invalid argument");
+ break;
+ }
+ }
+
+ return a;
+}
+
+void string_arr_delete(string_arr a)
+{
+ int i;
+
+ /* skip dummy first entry */
+ for (i = 1; i < a.len; i++) {
+ free(a.strings[i]);
+ }
+
+ free(a.strings);
+}
+
+void reset_rrd_state()
+{
+ optind = 0;
+ opterr = 0;
+ rrd_clear_error();
+}
+
+VALUE rrd_call(RRDFUNC func, VALUE args)
+{
+ string_arr a;
+
+ a = string_arr_new(args);
+ reset_rrd_state();
+ func(a.len, a.strings);
+ string_arr_delete(a);
+
+ RRD_CHECK_ERROR
+
+ return Qnil;
+}
+
+VALUE rb_rrd_create(VALUE self, VALUE args)
+{
+ return rrd_call(rrd_create, args);
+}
+
+VALUE rb_rrd_dump(VALUE self, VALUE args)
+{
+ return rrd_call(rrd_dump, args);
+}
+
+VALUE rb_rrd_fetch(VALUE self, VALUE args)
+{
+ string_arr a;
+ unsigned long i, j, k, step, ds_cnt;
+ rrd_value_t *raw_data;
+ char **raw_names;
+ VALUE data, names, result;
+ time_t start, end;
+
+ a = string_arr_new(args);
+ reset_rrd_state();
+ rrd_fetch(a.len, a.strings, &start, &end, &step, &ds_cnt, &raw_names, &raw_data);
+ string_arr_delete(a);
+
+ RRD_CHECK_ERROR
+
+ names = rb_ary_new();
+ for (i = 0; i < ds_cnt; i++) {
+ rb_ary_push(names, rb_str_new2(raw_names[i]));
+ free(raw_names[i]);
+ }
+ free(raw_names);
+
+ k = 0;
+ data = rb_ary_new();
+ for (i = start; i <= end; i += step) {
+ VALUE line = rb_ary_new2(ds_cnt);
+ for (j = 0; j < ds_cnt; j++) {
+ rb_ary_store(line, j, rb_float_new(raw_data[k]));
+ k++;
+ }
+ rb_ary_push(data, line);
+ }
+ free(raw_data);
+
+ result = rb_ary_new2(4);
+ rb_ary_store(result, 0, INT2FIX(start));
+ rb_ary_store(result, 1, INT2FIX(end));
+ rb_ary_store(result, 2, names);
+ rb_ary_store(result, 2, data);
+ return result;
+}
+
+VALUE rb_rrd_graph(VALUE self, VALUE args)
+{
+ string_arr a;
+ char **calcpr, **p;
+ VALUE result, print_results;
+ int i, xsize, ysize;
+ double ymin, ymax;
+
+ a = string_arr_new(args);
+ reset_rrd_state();
+ rrd_graph(a.len, a.strings, &calcpr, &xsize, &ysize, NULL, &ymin, &ymax);
+ string_arr_delete(a);
+
+ RRD_CHECK_ERROR
+
+ result = rb_ary_new2(3);
+ print_results = rb_ary_new();
+ p = calcpr;
+ for (p = calcpr; p && *p; p++) {
+ rb_ary_push(print_results, rb_str_new2(*p));
+ free(*p);
+ }
+ free(calcpr);
+ rb_ary_store(result, 0, print_results);
+ rb_ary_store(result, 1, INT2FIX(xsize));
+ rb_ary_store(result, 2, INT2FIX(ysize));
+ return result;
+}
+
+/*
+VALUE rb_rrd_info(VALUE self, VALUE args)
+{
+ string_arr a;
+ info_t *p;
+ VALUE result;
+
+ a = string_arr_new(args);
+ data = rrd_info(a.len, a.strings);
+ string_arr_delete(a);
+
+ RRD_CHECK_ERROR
+
+ result = rb_hash_new();
+ while (data) {
+ VALUE key = rb_str_new2(data->key);
+ switch (data->type) {
+ case RD_I_VAL:
+ if (isnan(data->u_val)) {
+ rb_hash_aset(result, key, Qnil);
+ }
+ else {
+ rb_hash_aset(result, key, rb_float_new(data->u_val));
+ }
+ break;
+ case RD_I_CNT:
+ rb_hash_aset(result, key, INT2FIX(data->u_cnt));
+ break;
+ case RD_I_STR:
+ rb_hash_aset(result, key, rb_str_new2(data->u_str));
+ free(data->u_str);
+ break;
+ }
+ p = data;
+ data = data->next;
+ free(p);
+ }
+ return result;
+}
+*/
+
+VALUE rb_rrd_last(VALUE self, VALUE args)
+{
+ string_arr a;
+ time_t last;
+
+ a = string_arr_new(args);
+ reset_rrd_state();
+ last = rrd_last(a.len, a.strings);
+ string_arr_delete(a);
+
+ RRD_CHECK_ERROR
+
+ return rb_funcall(rb_cTime, rb_intern("at"), 1, INT2FIX(last));
+}
+
+VALUE rb_rrd_resize(VALUE self, VALUE args)
+{
+ return rrd_call(rrd_resize, args);
+}
+
+VALUE rb_rrd_restore(VALUE self, VALUE args)
+{
+ return rrd_call(rrd_restore, args);
+}
+
+VALUE rb_rrd_tune(VALUE self, VALUE args)
+{
+ return rrd_call(rrd_tune, args);
+}
+
+VALUE rb_rrd_update(VALUE self, VALUE args)
+{
+ return rrd_call(rrd_update, args);
+}
+
+void Init_RRD()
+{
+ mRRD = rb_define_module("RRD");
+ rb_eRRDError = rb_define_class("RRDError", rb_eStandardError);
+
+ rb_define_module_function(mRRD, "create", rb_rrd_create, -2);
+ rb_define_module_function(mRRD, "dump", rb_rrd_dump, -2);
+ rb_define_module_function(mRRD, "fetch", rb_rrd_fetch, -2);
+ rb_define_module_function(mRRD, "graph", rb_rrd_graph, -2);
+ rb_define_module_function(mRRD, "last", rb_rrd_last, -2);
+ rb_define_module_function(mRRD, "resize", rb_rrd_resize, -2);
+ rb_define_module_function(mRRD, "restore", rb_rrd_restore, -2);
+ rb_define_module_function(mRRD, "tune", rb_rrd_tune, -2);
+ rb_define_module_function(mRRD, "update", rb_rrd_update, -2);
+}
projects / rrdtool.git / commitdiff