/*
* cash.c
* Written by D'Arcy J.M. Cain
+ * darcy@druid.net
+ * http://www.druid.net/darcy/
*
* Functions to allow input and output of money normally but store
- * and handle it as int4s
+ * and handle it as 64 bit ints
*
* A slightly modified version of this file and a discussion of the
* workings can be found in the book "Software Solutions in C" by
- * Dale Schumacher, Academic Press, ISBN: 0-12-632360-7.
+ * Dale Schumacher, Academic Press, ISBN: 0-12-632360-7 except that
+ * this version handles 64 bit numbers and so can hold values up to
+ * $92,233,720,368,547,758.07.
*
- * $PostgreSQL: pgsql/src/backend/utils/adt/cash.c,v 1.68 2006/07/14 14:52:23 momjian Exp $
+ * $PostgreSQL: pgsql/src/backend/utils/adt/cash.c,v 1.69 2007/01/03 01:19:50 darcy Exp $
*/
#include "postgres.h"
#include "utils/cash.h"
#include "utils/pg_locale.h"
-
-static const char *num_word(Cash value);
-
-/* when we go to 64 bit values we will have to modify this */
-#define CASH_BUFSZ 24
+#define CASH_BUFSZ 36
#define TERMINATOR (CASH_BUFSZ - 1)
#define LAST_PAREN (TERMINATOR - 1)
#define LAST_DIGIT (LAST_PAREN - 1)
-
/*
* Cash is a pass-by-ref SQL type, so we must pass and return pointers.
* These macros and support routine hide the pass-by-refness.
#define PG_GETARG_CASH(n) (* ((Cash *) PG_GETARG_POINTER(n)))
#define PG_RETURN_CASH(x) return CashGetDatum(x)
+
+
+/*************************************************************************
+ * Private routines
+ ************************************************************************/
+
+static const char *
+num_word(Cash value)
+{
+ static char buf[128];
+ static const char *small[] = {
+ "zero", "one", "two", "three", "four", "five", "six", "seven",
+ "eight", "nine", "ten", "eleven", "twelve", "thirteen", "fourteen",
+ "fifteen", "sixteen", "seventeen", "eighteen", "nineteen", "twenty",
+ "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety"
+ };
+ const char **big = small + 18;
+ int tu = value % 100;
+
+ /* deal with the simple cases first */
+ if (value <= 20)
+ return small[value];
+
+ /* is it an even multiple of 100? */
+ if (!tu)
+ {
+ sprintf(buf, "%s hundred", small[value / 100]);
+ return buf;
+ }
+
+ /* more than 99? */
+ if (value > 99)
+ {
+ /* is it an even multiple of 10 other than 10? */
+ if (value % 10 == 0 && tu > 10)
+ sprintf(buf, "%s hundred %s",
+ small[value / 100], big[tu / 10]);
+ else if (tu < 20)
+ sprintf(buf, "%s hundred and %s",
+ small[value / 100], small[tu]);
+ else
+ sprintf(buf, "%s hundred %s %s",
+ small[value / 100], big[tu / 10], small[tu % 10]);
+
+ }
+ else
+ {
+ /* is it an even multiple of 10 other than 10? */
+ if (value % 10 == 0 && tu > 10)
+ sprintf(buf, "%s", big[tu / 10]);
+ else if (tu < 20)
+ sprintf(buf, "%s", small[tu]);
+ else
+ sprintf(buf, "%s %s", big[tu / 10], small[tu % 10]);
+ }
+
+ return buf;
+} /* num_word() */
+
static Datum
CashGetDatum(Cash value)
{
* Format is [$]###[,]###[.##]
* Examples: 123.45 $123.45 $123,456.78
*
- * This is currently implemented as a 32-bit integer.
- * XXX HACK It looks as though some of the symbols for
- * monetary values returned by localeconv() can be multiple
- * bytes/characters. This code assumes one byte only. - tgl 97/04/14
- * XXX UNHACK Allow the currency symbol to be multibyte.
- * - thomas 1998-03-01
*/
Datum
cash_in(PG_FUNCTION_ARGS)
int seen_dot = 0;
const char *s = str;
int fpoint;
- char *csymbol;
char dsymbol,
ssymbol,
- psymbol,
- *nsymbol;
+ psymbol;
+ const char *nsymbol,
+ *csymbol;
struct lconv *lconvert = PGLC_localeconv();
/* a leading minus or paren signifies a negative number */
/* again, better heuristics needed */
+ /* XXX - doesn't properly check for balanced parens - djmc */
if (strncmp(s, nsymbol, strlen(nsymbol)) == 0)
{
sgn = -1;
for (;; s++)
{
- /* we look for digits as int4 as we have less */
+ /* we look for digits as int8 as we have less */
/* than the required number of decimal places */
if (isdigit((unsigned char) *s) && dec < fpoint)
{
if (seen_dot)
dec++;
- /* decimal point? then start counting fractions... */
}
+ /* decimal point? then start counting fractions... */
else if (*s == dsymbol && !seen_dot)
{
seen_dot = 1;
- /* "thousands" separator? then skip... */
}
+ /* "thousands" separator? then skip... */
else if (*s == ssymbol)
{
}
}
- while (isspace((unsigned char) *s) || *s == '0' || *s == ')')
+ /* should only be trailing digits followed by whitespace or closing paren */
+ while (isdigit(*s)) s++;
+ while (isspace((unsigned char) *s) || *s == ')')
s++;
if (*s != '\0')
int points,
mon_group;
char comma;
- char *csymbol,
- dsymbol,
+ const char *csymbol,
*nsymbol;
+ char dsymbol;
char convention;
struct lconv *lconvert = PGLC_localeconv();
else if (comma && count % (mon_group + 1) == comma_position)
buf[count--] = comma;
- buf[count--] = ((unsigned int) value % 10) + '0';
- value = ((unsigned int) value) / 10;
+ buf[count--] = ((uint64) value % 10) + '0';
+ value = ((uint64) value) / 10;
}
strncpy((buf + count - strlen(csymbol) + 1), csymbol, strlen(csymbol));
/* cash_div_flt8()
* Divide cash by float8.
- *
- * XXX Don't know if rounding or truncating is correct behavior.
- * Round for now. - tgl 97/04/15
*/
Datum
cash_div_flt8(PG_FUNCTION_ARGS)
PG_RETURN_CASH(result);
}
+
/* cash_mul_flt4()
* Multiply cash by float4.
*/
/* cash_div_flt4()
* Divide cash by float4.
*
- * XXX Don't know if rounding or truncating is correct behavior.
- * Round for now. - tgl 97/04/15
*/
Datum
cash_div_flt4(PG_FUNCTION_ARGS)
}
+/* cash_mul_int8()
+ * Multiply cash by int8.
+ */
+Datum
+cash_mul_int8(PG_FUNCTION_ARGS)
+{
+ Cash c = PG_GETARG_CASH(0);
+ int64 i = PG_GETARG_INT64(1);
+ Cash result;
+
+ result = c * i;
+ PG_RETURN_CASH(result);
+}
+
+
+/* int8_mul_cash()
+ * Multiply int8 by cash.
+ */
+Datum
+int8_mul_cash(PG_FUNCTION_ARGS)
+{
+ int64 i = PG_GETARG_INT64(0);
+ Cash c = PG_GETARG_CASH(1);
+ Cash result;
+
+ result = i * c;
+ PG_RETURN_CASH(result);
+}
+
+/* cash_div_int8()
+ * Divide cash by 8-byte integer.
+ */
+Datum
+cash_div_int8(PG_FUNCTION_ARGS)
+{
+ Cash c = PG_GETARG_CASH(0);
+ int64 i = PG_GETARG_INT64(1);
+ Cash result;
+
+ if (i == 0)
+ ereport(ERROR,
+ (errcode(ERRCODE_DIVISION_BY_ZERO),
+ errmsg("division by zero")));
+
+ result = rint(c / i);
+
+ PG_RETURN_CASH(result);
+}
+
+
/* cash_mul_int4()
* Multiply cash by int4.
*/
cash_mul_int4(PG_FUNCTION_ARGS)
{
Cash c = PG_GETARG_CASH(0);
- int32 i = PG_GETARG_INT32(1);
+ int64 i = PG_GETARG_INT64(1);
Cash result;
result = c * i;
/* cash_div_int4()
* Divide cash by 4-byte integer.
*
- * XXX Don't know if rounding or truncating is correct behavior.
- * Round for now. - tgl 97/04/15
*/
Datum
cash_div_int4(PG_FUNCTION_ARGS)
{
Cash c = PG_GETARG_CASH(0);
- int32 i = PG_GETARG_INT32(1);
+ int64 i = PG_GETARG_INT64(1);
Cash result;
if (i == 0)
/* cash_div_int2()
* Divide cash by int2.
*
- * XXX Don't know if rounding or truncating is correct behavior.
- * Round for now. - tgl 97/04/15
*/
Datum
cash_div_int2(PG_FUNCTION_ARGS)
PG_RETURN_CASH(result);
}
-
/* cash_words()
* This converts a int4 as well but to a representation using words
* Obviously way North American centric - sorry
cash_words(PG_FUNCTION_ARGS)
{
Cash value = PG_GETARG_CASH(0);
- unsigned int val;
+ uint64 val;
char buf[256];
char *p = buf;
Cash m0;
Cash m1;
Cash m2;
Cash m3;
+ Cash m4;
+ Cash m5;
+ Cash m6;
text *result;
/* work with positive numbers */
buf[0] = '\0';
/* Now treat as unsigned, to avoid trouble at INT_MIN */
- val = (unsigned int) value;
+ val = (uint64) value;
- m0 = val % 100; /* cents */
- m1 = (val / 100) % 1000; /* hundreds */
- m2 = (val / 100000) % 1000; /* thousands */
- m3 = val / 100000000 % 1000; /* millions */
+ m0 = val % 100ll; /* cents */
+ m1 = (val / 100ll) % 1000; /* hundreds */
+ m2 = (val / 100000ll) % 1000; /* thousands */
+ m3 = val / 100000000ll % 1000; /* millions */
+ m4 = val / 100000000000ll % 1000; /* billions */
+ m5 = val / 100000000000000ll % 1000; /* trillions */
+ m6 = val / 100000000000000000ll % 1000; /* quadrillions */
+
+ if (m6)
+ {
+ strcat(buf, num_word(m6));
+ strcat(buf, " quadrillion ");
+ }
+
+ if (m5)
+ {
+ strcat(buf, num_word(m5));
+ strcat(buf, " trillion ");
+ }
+
+ if (m4)
+ {
+ strcat(buf, num_word(m4));
+ strcat(buf, " billion ");
+ }
if (m3)
{
PG_RETURN_TEXT_P(result);
}
-
-
-/*************************************************************************
- * Private routines
- ************************************************************************/
-
-static const char *
-num_word(Cash value)
-{
- static char buf[128];
- static const char *small[] = {
- "zero", "one", "two", "three", "four", "five", "six", "seven",
- "eight", "nine", "ten", "eleven", "twelve", "thirteen", "fourteen",
- "fifteen", "sixteen", "seventeen", "eighteen", "nineteen", "twenty",
- "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety"
- };
- const char **big = small + 18;
- int tu = value % 100;
-
- /* deal with the simple cases first */
- if (value <= 20)
- return small[value];
-
- /* is it an even multiple of 100? */
- if (!tu)
- {
- sprintf(buf, "%s hundred", small[value / 100]);
- return buf;
- }
-
- /* more than 99? */
- if (value > 99)
- {
- /* is it an even multiple of 10 other than 10? */
- if (value % 10 == 0 && tu > 10)
- sprintf(buf, "%s hundred %s",
- small[value / 100], big[tu / 10]);
- else if (tu < 20)
- sprintf(buf, "%s hundred and %s",
- small[value / 100], small[tu]);
- else
- sprintf(buf, "%s hundred %s %s",
- small[value / 100], big[tu / 10], small[tu % 10]);
-
- }
- else
- {
- /* is it an even multiple of 10 other than 10? */
- if (value % 10 == 0 && tu > 10)
- sprintf(buf, "%s", big[tu / 10]);
- else if (tu < 20)
- sprintf(buf, "%s", small[tu]);
- else
- sprintf(buf, "%s %s", big[tu / 10], small[tu % 10]);
- }
-
- return buf;
-} /* num_word() */
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