should be it

external/duckdb/extension/tpcds/dsdgen/dsdgen-c/misc.cpp

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+/*
+ * Legal Notice
+ *
+ * This document and associated source code (the "Work") is a part of a
+ * benchmark specification maintained by the TPC.
+ *
+ * The TPC reserves all right, title, and interest to the Work as provided
+ * under U.S. and international laws, including without limitation all patent
+ * and trademark rights therein.
+ *
+ * No Warranty
+ *
+ * 1.1 TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE INFORMATION
+ *     CONTAINED HEREIN IS PROVIDED "AS IS" AND WITH ALL FAULTS, AND THE
+ *     AUTHORS AND DEVELOPERS OF THE WORK HEREBY DISCLAIM ALL OTHER
+ *     WARRANTIES AND CONDITIONS, EITHER EXPRESS, IMPLIED OR STATUTORY,
+ *     INCLUDING, BUT NOT LIMITED TO, ANY (IF ANY) IMPLIED WARRANTIES,
+ *     DUTIES OR CONDITIONS OF MERCHANTABILITY, OF FITNESS FOR A PARTICULAR
+ *     PURPOSE, OF ACCURACY OR COMPLETENESS OF RESPONSES, OF RESULTS, OF
+ *     WORKMANLIKE EFFORT, OF LACK OF VIRUSES, AND OF LACK OF NEGLIGENCE.
+ *     ALSO, THERE IS NO WARRANTY OR CONDITION OF TITLE, QUIET ENJOYMENT,
+ *     QUIET POSSESSION, CORRESPONDENCE TO DESCRIPTION OR NON-INFRINGEMENT
+ *     WITH REGARD TO THE WORK.
+ * 1.2 IN NO EVENT WILL ANY AUTHOR OR DEVELOPER OF THE WORK BE LIABLE TO
+ *     ANY OTHER PARTY FOR ANY DAMAGES, INCLUDING BUT NOT LIMITED TO THE
+ *     COST OF PROCURING SUBSTITUTE GOODS OR SERVICES, LOST PROFITS, LOSS
+ *     OF USE, LOSS OF DATA, OR ANY INCIDENTAL, CONSEQUENTIAL, DIRECT,
+ *     INDIRECT, OR SPECIAL DAMAGES WHETHER UNDER CONTRACT, TORT, WARRANTY,
+ *     OR OTHERWISE, ARISING IN ANY WAY OUT OF THIS OR ANY OTHER AGREEMENT
+ *     RELATING TO THE WORK, WHETHER OR NOT SUCH AUTHOR OR DEVELOPER HAD
+ *     ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.
+ *
+ * Contributors:
+ * Gradient Systems
+ */
+
+#include "config.h"
+#include "porting.h"
+#include <stdio.h>
+#include <time.h>
+#include <errno.h>
+#include <ctype.h>
+#include <math.h>
+#ifndef USE_STDLIB_H
+#include <malloc.h>
+#endif
+#include <fcntl.h>
+#ifdef AIX
+#include <sys/mode.h>
+#endif /* AIX */
+#include <sys/types.h>
+#include <sys/stat.h>
+#include "date.h"
+#include "decimal.h"
+#include "dist.h"
+#include "misc.h"
+#include "tdefs.h"
+#include "r_params.h"
+#include "genrand.h"
+
+static char alpha_num[65] = "0123456789abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ,";
+
+char *getenv(const char *name);
+int print_separator(int sep);
+
+extern long Seed[];
+
+#ifdef _WIN32
+#define PATH_SEP '\\'
+#else
+#define PATH_SEP '/'
+#endif
+
+int file_num = -1;
+
+/*
+ *
+ * Various routines that handle distributions, value selections and
+ * seed value management for the DSS benchmark. Current functions:
+ * env_config -- set config vars with optional environment override
+ * a_rnd(min, max) -- random alphanumeric within length range
+ */
+
+/*
+ * env_config: look for a environmental variable setting and return its
+ * value; otherwise return the default supplied
+ */
+char *env_config(char *var, char *dflt) {
+	static char *evar;
+
+	if ((evar = getenv(var)) != NULL)
+		return (evar);
+	else
+		return (dflt);
+}
+
+/*
+ * generate a random string with length randomly selected in [min, max]
+ * and using the characters in alphanum (currently includes a space
+ * and comma)
+ */
+int a_rnd(int min, int max, int column, char *dest) {
+	int i, len, char_int;
+
+	genrand_integer(&len, DIST_UNIFORM, min, max, 0, column);
+	for (i = 0; i < len; i++) {
+		if (i % 5 == 0)
+			genrand_integer(&char_int, DIST_UNIFORM, 0, 1 << 30, 0, column);
+		*(dest + i) = alpha_num[char_int & 077];
+		char_int >>= 6;
+	}
+	*(dest + len) = '\0';
+	return (len);
+}