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diff --git a/src/core/data.c b/src/core/data.c
index dc2d0ae8afde4dbb741bc2525444fddad05ed0a8..968e99de5003b4ff1e7b061de6922928f950b655 100644 (file)
--- a/src/core/data.c
+++ b/src/core/data.c
# include "config.h"
#endif /* HAVE_CONFIG_H */
+#include "sysdb.h"
+
#include "core/data.h"
+#include "utils/error.h"
+
+#include <errno.h>
#include <inttypes.h>
#include <stdlib.h>
#include <string.h>
+#include <math.h>
+
+/*
+ * private helper functions
+ */
+
+/* Calculate the linear function 'd1 + n * d2'. */
+static int
+data_lin(const sdb_data_t *d1, int n, const sdb_data_t *d2, sdb_data_t *res)
+{
+ if (d1->type != d2->type)
+ return -1;
+
+ if (d1->type == SDB_TYPE_INTEGER)
+ res->data.integer = d1->data.integer + (int64_t)n * d2->data.integer;
+ else if (d1->type == SDB_TYPE_DECIMAL)
+ res->data.decimal = d1->data.decimal + (double)n * d2->data.decimal;
+ else if (d1->type == SDB_TYPE_DATETIME)
+ res->data.datetime = d1->data.datetime + (sdb_time_t)n * d2->data.datetime;
+ else
+ return -1;
+ res->type = d1->type;
+ return 0;
+} /* data_lin */
+
+/* Multiply d1 with d2. */
+static int
+data_mul(const sdb_data_t *d1, const sdb_data_t *d2, sdb_data_t *res)
+{
+ if (d1->type == SDB_TYPE_INTEGER) {
+ if (d2->type == SDB_TYPE_INTEGER)
+ res->data.integer = d1->data.integer * d2->data.integer;
+ else if (d2->type == SDB_TYPE_DATETIME) {
+ res->data.datetime = (sdb_time_t)d1->data.integer
+ * d2->data.datetime;
+ res->type = SDB_TYPE_DATETIME;
+ return 0;
+ }
+ else
+ return -1;
+ }
+ else if (d1->type == SDB_TYPE_DECIMAL) {
+ if (d2->type == SDB_TYPE_DECIMAL)
+ res->data.decimal = d1->data.decimal * d2->data.decimal;
+ else if (d2->type == SDB_TYPE_DATETIME) {
+ res->data.datetime = (sdb_time_t)(d1->data.decimal
+ * (double)d2->data.datetime);
+ res->type = SDB_TYPE_DATETIME;
+ return 0;
+ }
+ else
+ return -1;
+ }
+ else if (d1->type == SDB_TYPE_DATETIME) {
+ if (d2->type == SDB_TYPE_DATETIME)
+ res->data.datetime = d1->data.datetime
+ * d2->data.datetime;
+ else if (d2->type == SDB_TYPE_INTEGER)
+ res->data.datetime = d1->data.datetime
+ * (sdb_time_t)d2->data.integer;
+ else if (d2->type == SDB_TYPE_DECIMAL)
+ res->data.datetime = (sdb_time_t)((double)d1->data.datetime
+ * d2->data.decimal);
+ else
+ return -1;
+ }
+ else
+ return -1;
+
+ res->type = d1->type;
+ return 0;
+} /* data_mul */
+
+/* Device d1 by d2 and return the result and the remainder. */
+static int
+data_div(const sdb_data_t *d1, const sdb_data_t *d2,
+ sdb_data_t *res, sdb_data_t *rem)
+{
+ if (d1->type == SDB_TYPE_INTEGER) {
+ if (d2->type != SDB_TYPE_INTEGER)
+ return -1;
+ if (res)
+ res->data.integer = d1->data.integer / d2->data.integer;
+ if (rem)
+ rem->data.integer = d1->data.integer % d2->data.integer;
+ }
+ else if (d1->type == SDB_TYPE_DECIMAL) {
+ if (d2->type != SDB_TYPE_DECIMAL)
+ return -1;
+ if (res)
+ res->data.decimal = d1->data.decimal / d2->data.decimal;
+ if (rem)
+ rem->data.decimal = fmod(d1->data.decimal, d2->data.decimal);
+ }
+ else if (d1->type == SDB_TYPE_DATETIME) {
+ if (d2->type == SDB_TYPE_DECIMAL) {
+ if (res)
+ res->data.datetime = (sdb_time_t)((double)d1->data.datetime
+ / d2->data.decimal);
+ if (rem) {
+ double tmp = fmod((double)d1->data.datetime, d2->data.decimal);
+ rem->data.datetime = (sdb_time_t)tmp;
+ }
+ }
+ else {
+ sdb_time_t a, b;
+ if (d2->type == SDB_TYPE_DATETIME) {
+ a = d1->data.datetime;
+ b = d2->data.datetime;
+ }
+ else if (d2->type == SDB_TYPE_INTEGER) {
+ a = d1->data.datetime;
+ b = (sdb_time_t)d2->data.integer;
+ }
+ else
+ return -1;
+ if (res)
+ res->data.datetime = a / b;
+ if (rem)
+ rem->data.datetime = a % b;
+ }
+ }
+ else
+ return -1;
+
+ if (res)
+ res->type = d1->type;
+ if (rem)
+ rem->type = d1->type;
+ return 0;
+} /* data_div */
+
+/* Concatenate d1 and d2. */
+static int
+data_concat(const sdb_data_t *d1, const sdb_data_t *d2, sdb_data_t *res)
+{
+ unsigned char *new;
+ unsigned char *s1, *s2;
+ size_t len1, len2;
+
+ if (d1->type != d2->type)
+ return -1;
+
+ if (d1->type == SDB_TYPE_STRING) {
+ s1 = (unsigned char *)d1->data.string;
+ s2 = (unsigned char *)d2->data.string;
+ len1 = s1 ? strlen((char *)s1) : 0;
+ len2 = s2 ? strlen((char *)s2) : 0;
+ }
+ else if (d1->type == SDB_TYPE_BINARY) {
+ s1 = d1->data.binary.datum;
+ s2 = d2->data.binary.datum;
+ len1 = d1->data.binary.length;
+ len2 = d2->data.binary.length;
+ }
+ else
+ return -1;
+
+ if (s1 || s2) {
+ new = malloc(len1 + len2 + 1);
+ if (! new)
+ return -1;
+ }
+ else
+ new = NULL;
+
+ if (len1)
+ memcpy(new, s1, len1);
+ if (len2)
+ memcpy(new + len1, s2, len2);
+ if (new)
+ new[len1 + len2] = '\0';
+
+ res->type = d1->type;
+ if (res->type == SDB_TYPE_STRING) {
+ res->data.string = (char *)new;
+ }
+ else {
+ res->data.binary.datum = new;
+ res->data.binary.length = len1 + len2;
+ }
+ return 0;
+} /* data_concat */
+
/*
* public API
*/
break;
}
+ sdb_data_free_datum(dst);
*dst = tmp;
return 0;
} /* sdb_data_copy */
} /* sdb_data_free_datum */
int
-sdb_data_cmp(sdb_data_t *d1, sdb_data_t *d2)
+sdb_data_cmp(const sdb_data_t *d1, const sdb_data_t *d2)
{
#define CMP_NULL(a, b) \
do { \
if (d1->type != d2->type)
return -1;
-#define CMP(a, b) ((a) < (b) ? -1 : (a) > (b) ? 1 : 0)
switch (d1->type) {
case SDB_TYPE_INTEGER:
- return CMP(d1->data.integer, d2->data.integer);
+ return SDB_CMP(d1->data.integer, d2->data.integer);
case SDB_TYPE_DECIMAL:
- return CMP(d1->data.decimal, d2->data.decimal);
+ return SDB_CMP(d1->data.decimal, d2->data.decimal);
case SDB_TYPE_STRING:
CMP_NULL(d1->data.string, d2->data.string);
return strcasecmp(d1->data.string, d2->data.string);
case SDB_TYPE_DATETIME:
- return CMP(d1->data.datetime, d2->data.datetime);
+ return SDB_CMP(d1->data.datetime, d2->data.datetime);
case SDB_TYPE_BINARY:
{
int diff;
default:
return -1;
}
-#undef CMP
#undef CMP_NULL
} /* sdb_data_cmp */
+int
+sdb_data_expr_eval(int op, const sdb_data_t *d1, const sdb_data_t *d2,
+ sdb_data_t *res)
+{
+ if ((! d1) || (! d2) || (! res))
+ return -1;
+ switch (op) {
+ case SDB_DATA_CONCAT:
+ return data_concat(d1, d2, res);
+ case SDB_DATA_ADD:
+ return data_lin(d1, 1, d2, res);
+ case SDB_DATA_SUB:
+ return data_lin(d1, -1, d2, res);
+ case SDB_DATA_MUL:
+ return data_mul(d1, d2, res);
+ case SDB_DATA_DIV:
+ return data_div(d1, d2, res, NULL);
+ case SDB_DATA_MOD:
+ return data_div(d1, d2, NULL, res);
+ }
+ return -1;
+} /* sdb_data_expr_eval */
+
size_t
sdb_data_strlen(const sdb_data_t *datum)
{
return ret;
} /* sdb_data_format */
+int
+sdb_data_parse(char *str, int type, sdb_data_t *data)
+{
+ sdb_data_t tmp;
+
+ char *endptr = NULL;
+
+ errno = 0;
+ switch (type) {
+ case SDB_TYPE_INTEGER:
+ tmp.data.integer = strtoll(str, &endptr, 0);
+ break;
+ case SDB_TYPE_DECIMAL:
+ tmp.data.decimal = strtod(str, &endptr);
+ break;
+ case SDB_TYPE_STRING:
+ tmp.data.string = str;
+ break;
+ case SDB_TYPE_DATETIME:
+ {
+ double datetime = strtod(str, &endptr);
+ tmp.data.datetime = DOUBLE_TO_SDB_TIME(datetime);
+ }
+ break;
+ case SDB_TYPE_BINARY:
+ /* we don't support any binary information containing 0-bytes */
+ tmp.data.binary.length = strlen(str);
+ tmp.data.binary.datum = (unsigned char *)str;
+ break;
+ default:
+ errno = EINVAL;
+ return -1;
+ }
+
+ if ((type == SDB_TYPE_INTEGER) || (type == SDB_TYPE_DECIMAL)
+ || (type == SDB_TYPE_DATETIME)) {
+ if (errno || (str == endptr)) {
+ char errbuf[1024];
+ sdb_log(SDB_LOG_ERR, "core: Failed to parse string "
+ "'%s' as numeric value (type %i): %s", str, type,
+ sdb_strerror(errno, errbuf, sizeof(errbuf)));
+ return -1;
+ }
+ else if (endptr && (*endptr != '\0'))
+ sdb_log(SDB_LOG_WARNING, "core: Ignoring garbage after "
+ "number while parsing numeric value (type %i): %s.",
+ type, endptr);
+ }
+
+ if (data) {
+ *data = tmp;
+ data->type = type;
+ }
+ return 0;
+} /* sdb_data_parse */
+
/* vim: set tw=78 sw=4 ts=4 noexpandtab : */