Line data Source code
1 : /*
2 : * cash.c
3 : * Written by D'Arcy J.M. Cain
4 : * darcy@druid.net
5 : * http://www.druid.net/darcy/
6 : *
7 : * Functions to allow input and output of money normally but store
8 : * and handle it as 64 bit ints
9 : *
10 : * A slightly modified version of this file and a discussion of the
11 : * workings can be found in the book "Software Solutions in C" by
12 : * Dale Schumacher, Academic Press, ISBN: 0-12-632360-7 except that
13 : * this version handles 64 bit numbers and so can hold values up to
14 : * $92,233,720,368,547,758.07.
15 : *
16 : * src/backend/utils/adt/cash.c
17 : */
18 :
19 : #include "postgres.h"
20 :
21 : #include <limits.h>
22 : #include <ctype.h>
23 : #include <math.h>
24 :
25 : #include "common/int.h"
26 : #include "libpq/pqformat.h"
27 : #include "nodes/miscnodes.h"
28 : #include "utils/builtins.h"
29 : #include "utils/cash.h"
30 : #include "utils/float.h"
31 : #include "utils/numeric.h"
32 : #include "utils/pg_locale.h"
33 :
34 :
35 : /*************************************************************************
36 : * Private routines
37 : ************************************************************************/
38 :
39 : static void
40 16 : append_num_word(StringInfo buf, Cash value)
41 : {
42 : static const char *const small[] = {
43 : "zero", "one", "two", "three", "four", "five", "six", "seven",
44 : "eight", "nine", "ten", "eleven", "twelve", "thirteen", "fourteen",
45 : "fifteen", "sixteen", "seventeen", "eighteen", "nineteen", "twenty",
46 : "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety"
47 : };
48 16 : const char *const *big = small + 18;
49 16 : int tu = value % 100;
50 :
51 : /* deal with the simple cases first */
52 16 : if (value <= 20)
53 : {
54 4 : appendStringInfoString(buf, small[value]);
55 4 : return;
56 : }
57 :
58 : /* is it an even multiple of 100? */
59 12 : if (!tu)
60 : {
61 0 : appendStringInfo(buf, "%s hundred", small[value / 100]);
62 0 : return;
63 : }
64 :
65 : /* more than 99? */
66 12 : if (value > 99)
67 : {
68 : /* is it an even multiple of 10 other than 10? */
69 8 : if (value % 10 == 0 && tu > 10)
70 0 : appendStringInfo(buf, "%s hundred %s",
71 0 : small[value / 100], big[tu / 10]);
72 8 : else if (tu < 20)
73 0 : appendStringInfo(buf, "%s hundred and %s",
74 0 : small[value / 100], small[tu]);
75 : else
76 8 : appendStringInfo(buf, "%s hundred %s %s",
77 8 : small[value / 100], big[tu / 10], small[tu % 10]);
78 : }
79 : else
80 : {
81 : /* is it an even multiple of 10 other than 10? */
82 4 : if (value % 10 == 0 && tu > 10)
83 0 : appendStringInfoString(buf, big[tu / 10]);
84 4 : else if (tu < 20)
85 0 : appendStringInfoString(buf, small[tu]);
86 : else
87 4 : appendStringInfo(buf, "%s %s", big[tu / 10], small[tu % 10]);
88 : }
89 : }
90 :
91 : static inline Cash
92 20 : cash_pl_cash(Cash c1, Cash c2)
93 : {
94 : Cash res;
95 :
96 20 : if (unlikely(pg_add_s64_overflow(c1, c2, &res)))
97 4 : ereport(ERROR,
98 : (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
99 : errmsg("money out of range")));
100 :
101 16 : return res;
102 : }
103 :
104 : static inline Cash
105 12 : cash_mi_cash(Cash c1, Cash c2)
106 : {
107 : Cash res;
108 :
109 12 : if (unlikely(pg_sub_s64_overflow(c1, c2, &res)))
110 4 : ereport(ERROR,
111 : (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
112 : errmsg("money out of range")));
113 :
114 8 : return res;
115 : }
116 :
117 : static inline Cash
118 32 : cash_mul_float8(Cash c, float8 f)
119 : {
120 32 : float8 res = rint(float8_mul((float8) c, f));
121 :
122 32 : if (unlikely(isnan(res) || !FLOAT8_FITS_IN_INT64(res)))
123 16 : ereport(ERROR,
124 : (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
125 : errmsg("money out of range")));
126 :
127 16 : return (Cash) res;
128 : }
129 :
130 : static inline Cash
131 22 : cash_div_float8(Cash c, float8 f)
132 : {
133 22 : float8 res = rint(float8_div((float8) c, f));
134 :
135 22 : if (unlikely(isnan(res) || !FLOAT8_FITS_IN_INT64(res)))
136 4 : ereport(ERROR,
137 : (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
138 : errmsg("money out of range")));
139 :
140 18 : return (Cash) res;
141 : }
142 :
143 : static inline Cash
144 28 : cash_mul_int64(Cash c, int64 i)
145 : {
146 : Cash res;
147 :
148 28 : if (unlikely(pg_mul_s64_overflow(c, i, &res)))
149 4 : ereport(ERROR,
150 : (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
151 : errmsg("money out of range")));
152 :
153 24 : return res;
154 : }
155 :
156 : static inline Cash
157 46 : cash_div_int64(Cash c, int64 i)
158 : {
159 46 : if (unlikely(i == 0))
160 4 : ereport(ERROR,
161 : (errcode(ERRCODE_DIVISION_BY_ZERO),
162 : errmsg("division by zero")));
163 :
164 42 : return c / i;
165 : }
166 :
167 : /* cash_in()
168 : * Convert a string to a cash data type.
169 : * Format is [$]###[,]###[.##]
170 : * Examples: 123.45 $123.45 $123,456.78
171 : *
172 : */
173 : Datum
174 879 : cash_in(PG_FUNCTION_ARGS)
175 : {
176 879 : char *str = PG_GETARG_CSTRING(0);
177 879 : Node *escontext = fcinfo->context;
178 : Cash result;
179 879 : Cash value = 0;
180 879 : Cash dec = 0;
181 879 : Cash sgn = 1;
182 879 : bool seen_dot = false;
183 879 : const char *s = str;
184 : int fpoint;
185 : char dsymbol;
186 : const char *ssymbol,
187 : *psymbol,
188 : *nsymbol,
189 : *csymbol;
190 879 : struct lconv *lconvert = PGLC_localeconv();
191 :
192 : /*
193 : * frac_digits will be CHAR_MAX in some locales, notably C. However, just
194 : * testing for == CHAR_MAX is risky, because of compilers like gcc that
195 : * "helpfully" let you alter the platform-standard definition of whether
196 : * char is signed or not. If we are so unfortunate as to get compiled
197 : * with a nonstandard -fsigned-char or -funsigned-char switch, then our
198 : * idea of CHAR_MAX will not agree with libc's. The safest course is not
199 : * to test for CHAR_MAX at all, but to impose a range check for plausible
200 : * frac_digits values.
201 : */
202 879 : fpoint = lconvert->frac_digits;
203 879 : if (fpoint < 0 || fpoint > 10)
204 879 : fpoint = 2; /* best guess in this case, I think */
205 :
206 : /* we restrict dsymbol to be a single byte, but not the other symbols */
207 879 : if (*lconvert->mon_decimal_point != '\0' &&
208 0 : lconvert->mon_decimal_point[1] == '\0')
209 0 : dsymbol = *lconvert->mon_decimal_point;
210 : else
211 879 : dsymbol = '.';
212 879 : if (*lconvert->mon_thousands_sep != '\0')
213 0 : ssymbol = lconvert->mon_thousands_sep;
214 : else /* ssymbol should not equal dsymbol */
215 879 : ssymbol = (dsymbol != ',') ? "," : ".";
216 879 : csymbol = (*lconvert->currency_symbol != '\0') ? lconvert->currency_symbol : "$";
217 879 : psymbol = (*lconvert->positive_sign != '\0') ? lconvert->positive_sign : "+";
218 879 : nsymbol = (*lconvert->negative_sign != '\0') ? lconvert->negative_sign : "-";
219 :
220 : #ifdef CASHDEBUG
221 : printf("cashin- precision '%d'; decimal '%c'; thousands '%s'; currency '%s'; positive '%s'; negative '%s'\n",
222 : fpoint, dsymbol, ssymbol, csymbol, psymbol, nsymbol);
223 : #endif
224 :
225 : /* we need to add all sorts of checking here. For now just */
226 : /* strip all leading whitespace and any leading currency symbol */
227 879 : while (isspace((unsigned char) *s))
228 0 : s++;
229 879 : if (strncmp(s, csymbol, strlen(csymbol)) == 0)
230 80 : s += strlen(csymbol);
231 879 : while (isspace((unsigned char) *s))
232 0 : s++;
233 :
234 : #ifdef CASHDEBUG
235 : printf("cashin- string is '%s'\n", s);
236 : #endif
237 :
238 : /* a leading minus or paren signifies a negative number */
239 : /* again, better heuristics needed */
240 : /* XXX - doesn't properly check for balanced parens - djmc */
241 879 : if (strncmp(s, nsymbol, strlen(nsymbol)) == 0)
242 : {
243 323 : sgn = -1;
244 323 : s += strlen(nsymbol);
245 : }
246 556 : else if (*s == '(')
247 : {
248 8 : sgn = -1;
249 8 : s++;
250 : }
251 548 : else if (strncmp(s, psymbol, strlen(psymbol)) == 0)
252 0 : s += strlen(psymbol);
253 :
254 : #ifdef CASHDEBUG
255 : printf("cashin- string is '%s'\n", s);
256 : #endif
257 :
258 : /* allow whitespace and currency symbol after the sign, too */
259 879 : while (isspace((unsigned char) *s))
260 0 : s++;
261 879 : if (strncmp(s, csymbol, strlen(csymbol)) == 0)
262 4 : s += strlen(csymbol);
263 879 : while (isspace((unsigned char) *s))
264 0 : s++;
265 :
266 : #ifdef CASHDEBUG
267 : printf("cashin- string is '%s'\n", s);
268 : #endif
269 :
270 : /*
271 : * We accumulate the absolute amount in "value" and then apply the sign at
272 : * the end. (The sign can appear before or after the digits, so it would
273 : * be more complicated to do otherwise.) Because of the larger range of
274 : * negative signed integers, we build "value" in the negative and then
275 : * flip the sign at the end, catching most-negative-number overflow if
276 : * necessary.
277 : */
278 :
279 8718 : for (; *s; s++)
280 : {
281 : /*
282 : * We look for digits as long as we have found less than the required
283 : * number of decimal places.
284 : */
285 7895 : if (isdigit((unsigned char) *s) && (!seen_dot || dec < fpoint))
286 7064 : {
287 7076 : int8 digit = *s - '0';
288 :
289 14144 : if (pg_mul_s64_overflow(value, 10, &value) ||
290 7068 : pg_sub_s64_overflow(value, digit, &value))
291 12 : ereturn(escontext, (Datum) 0,
292 : (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
293 : errmsg("value \"%s\" is out of range for type %s",
294 : str, "money")));
295 :
296 7064 : if (seen_dot)
297 1530 : dec++;
298 : }
299 : /* decimal point? then start counting fractions... */
300 819 : else if (*s == dsymbol && !seen_dot)
301 : {
302 771 : seen_dot = true;
303 : }
304 : /* ignore if "thousands" separator, else we're done */
305 48 : else if (strncmp(s, ssymbol, strlen(ssymbol)) == 0)
306 4 : s += strlen(ssymbol) - 1;
307 : else
308 44 : break;
309 : }
310 :
311 : /* round off if there's another digit */
312 867 : if (isdigit((unsigned char) *s) && *s >= '5')
313 : {
314 : /* remember we build the value in the negative */
315 20 : if (pg_sub_s64_overflow(value, 1, &value))
316 4 : ereturn(escontext, (Datum) 0,
317 : (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
318 : errmsg("value \"%s\" is out of range for type %s",
319 : str, "money")));
320 : }
321 :
322 : /* adjust for less than required decimal places */
323 1055 : for (; dec < fpoint; dec++)
324 : {
325 208 : if (pg_mul_s64_overflow(value, 10, &value))
326 16 : ereturn(escontext, (Datum) 0,
327 : (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
328 : errmsg("value \"%s\" is out of range for type %s",
329 : str, "money")));
330 : }
331 :
332 : /*
333 : * should only be trailing digits followed by whitespace, right paren,
334 : * trailing sign, and/or trailing currency symbol
335 : */
336 871 : while (isdigit((unsigned char) *s))
337 24 : s++;
338 :
339 855 : while (*s)
340 : {
341 16 : if (isspace((unsigned char) *s) || *s == ')')
342 8 : s++;
343 8 : else if (strncmp(s, nsymbol, strlen(nsymbol)) == 0)
344 : {
345 0 : sgn = -1;
346 0 : s += strlen(nsymbol);
347 : }
348 8 : else if (strncmp(s, psymbol, strlen(psymbol)) == 0)
349 0 : s += strlen(psymbol);
350 8 : else if (strncmp(s, csymbol, strlen(csymbol)) == 0)
351 0 : s += strlen(csymbol);
352 : else
353 8 : ereturn(escontext, (Datum) 0,
354 : (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
355 : errmsg("invalid input syntax for type %s: \"%s\"",
356 : "money", str)));
357 : }
358 :
359 : /*
360 : * If the value is supposed to be positive, flip the sign, but check for
361 : * the most negative number.
362 : */
363 839 : if (sgn > 0)
364 : {
365 524 : if (value == PG_INT64_MIN)
366 8 : ereturn(escontext, (Datum) 0,
367 : (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
368 : errmsg("value \"%s\" is out of range for type %s",
369 : str, "money")));
370 516 : result = -value;
371 : }
372 : else
373 315 : result = value;
374 :
375 : #ifdef CASHDEBUG
376 : printf("cashin- result is " INT64_FORMAT "\n", result);
377 : #endif
378 :
379 831 : PG_RETURN_CASH(result);
380 : }
381 :
382 :
383 : /* cash_out()
384 : * Function to convert cash to a dollars and cents representation, using
385 : * the lc_monetary locale's formatting.
386 : */
387 : Datum
388 265 : cash_out(PG_FUNCTION_ARGS)
389 : {
390 265 : Cash value = PG_GETARG_CASH(0);
391 : uint64 uvalue;
392 : char *result;
393 : char buf[128];
394 : char *bufptr;
395 : int digit_pos;
396 : int points,
397 : mon_group;
398 : char dsymbol;
399 : const char *ssymbol,
400 : *csymbol,
401 : *signsymbol;
402 : char sign_posn,
403 : cs_precedes,
404 : sep_by_space;
405 265 : struct lconv *lconvert = PGLC_localeconv();
406 :
407 : /* see comments about frac_digits in cash_in() */
408 265 : points = lconvert->frac_digits;
409 265 : if (points < 0 || points > 10)
410 265 : points = 2; /* best guess in this case, I think */
411 :
412 : /*
413 : * As with frac_digits, must apply a range check to mon_grouping to avoid
414 : * being fooled by variant CHAR_MAX values.
415 : */
416 265 : mon_group = *lconvert->mon_grouping;
417 265 : if (mon_group <= 0 || mon_group > 6)
418 265 : mon_group = 3;
419 :
420 : /* we restrict dsymbol to be a single byte, but not the other symbols */
421 265 : if (*lconvert->mon_decimal_point != '\0' &&
422 0 : lconvert->mon_decimal_point[1] == '\0')
423 0 : dsymbol = *lconvert->mon_decimal_point;
424 : else
425 265 : dsymbol = '.';
426 265 : if (*lconvert->mon_thousands_sep != '\0')
427 0 : ssymbol = lconvert->mon_thousands_sep;
428 : else /* ssymbol should not equal dsymbol */
429 265 : ssymbol = (dsymbol != ',') ? "," : ".";
430 265 : csymbol = (*lconvert->currency_symbol != '\0') ? lconvert->currency_symbol : "$";
431 :
432 265 : if (value < 0)
433 : {
434 : /* set up formatting data */
435 56 : signsymbol = (*lconvert->negative_sign != '\0') ? lconvert->negative_sign : "-";
436 56 : sign_posn = lconvert->n_sign_posn;
437 56 : cs_precedes = lconvert->n_cs_precedes;
438 56 : sep_by_space = lconvert->n_sep_by_space;
439 : }
440 : else
441 : {
442 209 : signsymbol = lconvert->positive_sign;
443 209 : sign_posn = lconvert->p_sign_posn;
444 209 : cs_precedes = lconvert->p_cs_precedes;
445 209 : sep_by_space = lconvert->p_sep_by_space;
446 : }
447 :
448 : /* make the amount positive for digit-reconstruction loop */
449 265 : uvalue = pg_abs_s64(value);
450 :
451 : /* we build the digits+decimal-point+sep string right-to-left in buf[] */
452 265 : bufptr = buf + sizeof(buf) - 1;
453 265 : *bufptr = '\0';
454 :
455 : /*
456 : * Generate digits till there are no non-zero digits left and we emitted
457 : * at least one to the left of the decimal point. digit_pos is the
458 : * current digit position, with zero as the digit just left of the decimal
459 : * point, increasing to the right.
460 : */
461 265 : digit_pos = points;
462 : do
463 : {
464 2139 : if (points && digit_pos == 0)
465 : {
466 : /* insert decimal point, but not if value cannot be fractional */
467 265 : *(--bufptr) = dsymbol;
468 : }
469 1874 : else if (digit_pos < 0 && (digit_pos % mon_group) == 0)
470 : {
471 : /* insert thousands sep, but only to left of radix point */
472 351 : bufptr -= strlen(ssymbol);
473 351 : memcpy(bufptr, ssymbol, strlen(ssymbol));
474 : }
475 :
476 2139 : *(--bufptr) = (uvalue % 10) + '0';
477 2139 : uvalue = uvalue / 10;
478 2139 : digit_pos--;
479 2139 : } while (uvalue || digit_pos >= 0);
480 :
481 : /*----------
482 : * Now, attach currency symbol and sign symbol in the correct order.
483 : *
484 : * The POSIX spec defines these values controlling this code:
485 : *
486 : * p/n_sign_posn:
487 : * 0 Parentheses enclose the quantity and the currency_symbol.
488 : * 1 The sign string precedes the quantity and the currency_symbol.
489 : * 2 The sign string succeeds the quantity and the currency_symbol.
490 : * 3 The sign string precedes the currency_symbol.
491 : * 4 The sign string succeeds the currency_symbol.
492 : *
493 : * p/n_cs_precedes: 0 means currency symbol after value, else before it.
494 : *
495 : * p/n_sep_by_space:
496 : * 0 No <space> separates the currency symbol and value.
497 : * 1 If the currency symbol and sign string are adjacent, a <space>
498 : * separates them from the value; otherwise, a <space> separates
499 : * the currency symbol from the value.
500 : * 2 If the currency symbol and sign string are adjacent, a <space>
501 : * separates them; otherwise, a <space> separates the sign string
502 : * from the value.
503 : *----------
504 : */
505 265 : switch (sign_posn)
506 : {
507 0 : case 0:
508 0 : if (cs_precedes)
509 0 : result = psprintf("(%s%s%s)",
510 : csymbol,
511 : (sep_by_space == 1) ? " " : "",
512 : bufptr);
513 : else
514 0 : result = psprintf("(%s%s%s)",
515 : bufptr,
516 : (sep_by_space == 1) ? " " : "",
517 : csymbol);
518 0 : break;
519 265 : case 1:
520 : default:
521 265 : if (cs_precedes)
522 265 : result = psprintf("%s%s%s%s%s",
523 : signsymbol,
524 : (sep_by_space == 2) ? " " : "",
525 : csymbol,
526 : (sep_by_space == 1) ? " " : "",
527 : bufptr);
528 : else
529 0 : result = psprintf("%s%s%s%s%s",
530 : signsymbol,
531 : (sep_by_space == 2) ? " " : "",
532 : bufptr,
533 : (sep_by_space == 1) ? " " : "",
534 : csymbol);
535 265 : break;
536 0 : case 2:
537 0 : if (cs_precedes)
538 0 : result = psprintf("%s%s%s%s%s",
539 : csymbol,
540 : (sep_by_space == 1) ? " " : "",
541 : bufptr,
542 : (sep_by_space == 2) ? " " : "",
543 : signsymbol);
544 : else
545 0 : result = psprintf("%s%s%s%s%s",
546 : bufptr,
547 : (sep_by_space == 1) ? " " : "",
548 : csymbol,
549 : (sep_by_space == 2) ? " " : "",
550 : signsymbol);
551 0 : break;
552 0 : case 3:
553 0 : if (cs_precedes)
554 0 : result = psprintf("%s%s%s%s%s",
555 : signsymbol,
556 : (sep_by_space == 2) ? " " : "",
557 : csymbol,
558 : (sep_by_space == 1) ? " " : "",
559 : bufptr);
560 : else
561 0 : result = psprintf("%s%s%s%s%s",
562 : bufptr,
563 : (sep_by_space == 1) ? " " : "",
564 : signsymbol,
565 : (sep_by_space == 2) ? " " : "",
566 : csymbol);
567 0 : break;
568 0 : case 4:
569 0 : if (cs_precedes)
570 0 : result = psprintf("%s%s%s%s%s",
571 : csymbol,
572 : (sep_by_space == 2) ? " " : "",
573 : signsymbol,
574 : (sep_by_space == 1) ? " " : "",
575 : bufptr);
576 : else
577 0 : result = psprintf("%s%s%s%s%s",
578 : bufptr,
579 : (sep_by_space == 1) ? " " : "",
580 : csymbol,
581 : (sep_by_space == 2) ? " " : "",
582 : signsymbol);
583 0 : break;
584 : }
585 :
586 265 : PG_RETURN_CSTRING(result);
587 : }
588 :
589 : /*
590 : * cash_recv - converts external binary format to cash
591 : */
592 : Datum
593 0 : cash_recv(PG_FUNCTION_ARGS)
594 : {
595 0 : StringInfo buf = (StringInfo) PG_GETARG_POINTER(0);
596 :
597 0 : PG_RETURN_CASH((Cash) pq_getmsgint64(buf));
598 : }
599 :
600 : /*
601 : * cash_send - converts cash to binary format
602 : */
603 : Datum
604 0 : cash_send(PG_FUNCTION_ARGS)
605 : {
606 0 : Cash arg1 = PG_GETARG_CASH(0);
607 : StringInfoData buf;
608 :
609 0 : pq_begintypsend(&buf);
610 0 : pq_sendint64(&buf, arg1);
611 0 : PG_RETURN_BYTEA_P(pq_endtypsend(&buf));
612 : }
613 :
614 : /*
615 : * Comparison functions
616 : */
617 :
618 : Datum
619 552 : cash_eq(PG_FUNCTION_ARGS)
620 : {
621 552 : Cash c1 = PG_GETARG_CASH(0);
622 552 : Cash c2 = PG_GETARG_CASH(1);
623 :
624 552 : PG_RETURN_BOOL(c1 == c2);
625 : }
626 :
627 : Datum
628 8 : cash_ne(PG_FUNCTION_ARGS)
629 : {
630 8 : Cash c1 = PG_GETARG_CASH(0);
631 8 : Cash c2 = PG_GETARG_CASH(1);
632 :
633 8 : PG_RETURN_BOOL(c1 != c2);
634 : }
635 :
636 : Datum
637 551 : cash_lt(PG_FUNCTION_ARGS)
638 : {
639 551 : Cash c1 = PG_GETARG_CASH(0);
640 551 : Cash c2 = PG_GETARG_CASH(1);
641 :
642 551 : PG_RETURN_BOOL(c1 < c2);
643 : }
644 :
645 : Datum
646 551 : cash_le(PG_FUNCTION_ARGS)
647 : {
648 551 : Cash c1 = PG_GETARG_CASH(0);
649 551 : Cash c2 = PG_GETARG_CASH(1);
650 :
651 551 : PG_RETURN_BOOL(c1 <= c2);
652 : }
653 :
654 : Datum
655 551 : cash_gt(PG_FUNCTION_ARGS)
656 : {
657 551 : Cash c1 = PG_GETARG_CASH(0);
658 551 : Cash c2 = PG_GETARG_CASH(1);
659 :
660 551 : PG_RETURN_BOOL(c1 > c2);
661 : }
662 :
663 : Datum
664 551 : cash_ge(PG_FUNCTION_ARGS)
665 : {
666 551 : Cash c1 = PG_GETARG_CASH(0);
667 551 : Cash c2 = PG_GETARG_CASH(1);
668 :
669 551 : PG_RETURN_BOOL(c1 >= c2);
670 : }
671 :
672 : Datum
673 663 : cash_cmp(PG_FUNCTION_ARGS)
674 : {
675 663 : Cash c1 = PG_GETARG_CASH(0);
676 663 : Cash c2 = PG_GETARG_CASH(1);
677 :
678 663 : if (c1 > c2)
679 561 : PG_RETURN_INT32(1);
680 102 : else if (c1 == c2)
681 7 : PG_RETURN_INT32(0);
682 : else
683 95 : PG_RETURN_INT32(-1);
684 : }
685 :
686 :
687 : /* cash_pl()
688 : * Add two cash values.
689 : */
690 : Datum
691 20 : cash_pl(PG_FUNCTION_ARGS)
692 : {
693 20 : Cash c1 = PG_GETARG_CASH(0);
694 20 : Cash c2 = PG_GETARG_CASH(1);
695 :
696 20 : PG_RETURN_CASH(cash_pl_cash(c1, c2));
697 : }
698 :
699 :
700 : /* cash_mi()
701 : * Subtract two cash values.
702 : */
703 : Datum
704 12 : cash_mi(PG_FUNCTION_ARGS)
705 : {
706 12 : Cash c1 = PG_GETARG_CASH(0);
707 12 : Cash c2 = PG_GETARG_CASH(1);
708 :
709 12 : PG_RETURN_CASH(cash_mi_cash(c1, c2));
710 : }
711 :
712 :
713 : /* cash_div_cash()
714 : * Divide cash by cash, returning float8.
715 : */
716 : Datum
717 4 : cash_div_cash(PG_FUNCTION_ARGS)
718 : {
719 4 : Cash dividend = PG_GETARG_CASH(0);
720 4 : Cash divisor = PG_GETARG_CASH(1);
721 : float8 quotient;
722 :
723 4 : if (divisor == 0)
724 0 : ereport(ERROR,
725 : (errcode(ERRCODE_DIVISION_BY_ZERO),
726 : errmsg("division by zero")));
727 :
728 4 : quotient = (float8) dividend / (float8) divisor;
729 4 : PG_RETURN_FLOAT8(quotient);
730 : }
731 :
732 :
733 : /* cash_mul_flt8()
734 : * Multiply cash by float8.
735 : */
736 : Datum
737 16 : cash_mul_flt8(PG_FUNCTION_ARGS)
738 : {
739 16 : Cash c = PG_GETARG_CASH(0);
740 16 : float8 f = PG_GETARG_FLOAT8(1);
741 :
742 16 : PG_RETURN_CASH(cash_mul_float8(c, f));
743 : }
744 :
745 :
746 : /* flt8_mul_cash()
747 : * Multiply float8 by cash.
748 : */
749 : Datum
750 4 : flt8_mul_cash(PG_FUNCTION_ARGS)
751 : {
752 4 : float8 f = PG_GETARG_FLOAT8(0);
753 4 : Cash c = PG_GETARG_CASH(1);
754 :
755 4 : PG_RETURN_CASH(cash_mul_float8(c, f));
756 : }
757 :
758 :
759 : /* cash_div_flt8()
760 : * Divide cash by float8.
761 : */
762 : Datum
763 9 : cash_div_flt8(PG_FUNCTION_ARGS)
764 : {
765 9 : Cash c = PG_GETARG_CASH(0);
766 9 : float8 f = PG_GETARG_FLOAT8(1);
767 :
768 9 : PG_RETURN_CASH(cash_div_float8(c, f));
769 : }
770 :
771 :
772 : /* cash_mul_flt4()
773 : * Multiply cash by float4.
774 : */
775 : Datum
776 8 : cash_mul_flt4(PG_FUNCTION_ARGS)
777 : {
778 8 : Cash c = PG_GETARG_CASH(0);
779 8 : float4 f = PG_GETARG_FLOAT4(1);
780 :
781 8 : PG_RETURN_CASH(cash_mul_float8(c, (float8) f));
782 : }
783 :
784 :
785 : /* flt4_mul_cash()
786 : * Multiply float4 by cash.
787 : */
788 : Datum
789 4 : flt4_mul_cash(PG_FUNCTION_ARGS)
790 : {
791 4 : float4 f = PG_GETARG_FLOAT4(0);
792 4 : Cash c = PG_GETARG_CASH(1);
793 :
794 4 : PG_RETURN_CASH(cash_mul_float8(c, (float8) f));
795 : }
796 :
797 :
798 : /* cash_div_flt4()
799 : * Divide cash by float4.
800 : *
801 : */
802 : Datum
803 13 : cash_div_flt4(PG_FUNCTION_ARGS)
804 : {
805 13 : Cash c = PG_GETARG_CASH(0);
806 13 : float4 f = PG_GETARG_FLOAT4(1);
807 :
808 13 : PG_RETURN_CASH(cash_div_float8(c, (float8) f));
809 : }
810 :
811 :
812 : /* cash_mul_int8()
813 : * Multiply cash by int8.
814 : */
815 : Datum
816 4 : cash_mul_int8(PG_FUNCTION_ARGS)
817 : {
818 4 : Cash c = PG_GETARG_CASH(0);
819 4 : int64 i = PG_GETARG_INT64(1);
820 :
821 4 : PG_RETURN_CASH(cash_mul_int64(c, i));
822 : }
823 :
824 :
825 : /* int8_mul_cash()
826 : * Multiply int8 by cash.
827 : */
828 : Datum
829 4 : int8_mul_cash(PG_FUNCTION_ARGS)
830 : {
831 4 : int64 i = PG_GETARG_INT64(0);
832 4 : Cash c = PG_GETARG_CASH(1);
833 :
834 4 : PG_RETURN_CASH(cash_mul_int64(c, i));
835 : }
836 :
837 : /* cash_div_int8()
838 : * Divide cash by 8-byte integer.
839 : */
840 : Datum
841 14 : cash_div_int8(PG_FUNCTION_ARGS)
842 : {
843 14 : Cash c = PG_GETARG_CASH(0);
844 14 : int64 i = PG_GETARG_INT64(1);
845 :
846 14 : PG_RETURN_CASH(cash_div_int64(c, i));
847 : }
848 :
849 :
850 : /* cash_mul_int4()
851 : * Multiply cash by int4.
852 : */
853 : Datum
854 8 : cash_mul_int4(PG_FUNCTION_ARGS)
855 : {
856 8 : Cash c = PG_GETARG_CASH(0);
857 8 : int32 i = PG_GETARG_INT32(1);
858 :
859 8 : PG_RETURN_CASH(cash_mul_int64(c, (int64) i));
860 : }
861 :
862 :
863 : /* int4_mul_cash()
864 : * Multiply int4 by cash.
865 : */
866 : Datum
867 4 : int4_mul_cash(PG_FUNCTION_ARGS)
868 : {
869 4 : int32 i = PG_GETARG_INT32(0);
870 4 : Cash c = PG_GETARG_CASH(1);
871 :
872 4 : PG_RETURN_CASH(cash_mul_int64(c, (int64) i));
873 : }
874 :
875 :
876 : /* cash_div_int4()
877 : * Divide cash by 4-byte integer.
878 : *
879 : */
880 : Datum
881 14 : cash_div_int4(PG_FUNCTION_ARGS)
882 : {
883 14 : Cash c = PG_GETARG_CASH(0);
884 14 : int32 i = PG_GETARG_INT32(1);
885 :
886 14 : PG_RETURN_CASH(cash_div_int64(c, (int64) i));
887 : }
888 :
889 :
890 : /* cash_mul_int2()
891 : * Multiply cash by int2.
892 : */
893 : Datum
894 4 : cash_mul_int2(PG_FUNCTION_ARGS)
895 : {
896 4 : Cash c = PG_GETARG_CASH(0);
897 4 : int16 s = PG_GETARG_INT16(1);
898 :
899 4 : PG_RETURN_CASH(cash_mul_int64(c, (int64) s));
900 : }
901 :
902 : /* int2_mul_cash()
903 : * Multiply int2 by cash.
904 : */
905 : Datum
906 4 : int2_mul_cash(PG_FUNCTION_ARGS)
907 : {
908 4 : int16 s = PG_GETARG_INT16(0);
909 4 : Cash c = PG_GETARG_CASH(1);
910 :
911 4 : PG_RETURN_CASH(cash_mul_int64(c, (int64) s));
912 : }
913 :
914 : /* cash_div_int2()
915 : * Divide cash by int2.
916 : *
917 : */
918 : Datum
919 18 : cash_div_int2(PG_FUNCTION_ARGS)
920 : {
921 18 : Cash c = PG_GETARG_CASH(0);
922 18 : int16 s = PG_GETARG_INT16(1);
923 :
924 18 : PG_RETURN_CASH(cash_div_int64(c, (int64) s));
925 : }
926 :
927 : /* cashlarger()
928 : * Return larger of two cash values.
929 : */
930 : Datum
931 4 : cashlarger(PG_FUNCTION_ARGS)
932 : {
933 4 : Cash c1 = PG_GETARG_CASH(0);
934 4 : Cash c2 = PG_GETARG_CASH(1);
935 : Cash result;
936 :
937 4 : result = (c1 > c2) ? c1 : c2;
938 :
939 4 : PG_RETURN_CASH(result);
940 : }
941 :
942 : /* cashsmaller()
943 : * Return smaller of two cash values.
944 : */
945 : Datum
946 4 : cashsmaller(PG_FUNCTION_ARGS)
947 : {
948 4 : Cash c1 = PG_GETARG_CASH(0);
949 4 : Cash c2 = PG_GETARG_CASH(1);
950 : Cash result;
951 :
952 4 : result = (c1 < c2) ? c1 : c2;
953 :
954 4 : PG_RETURN_CASH(result);
955 : }
956 :
957 : /* cash_words()
958 : * This converts an int4 as well but to a representation using words
959 : * Obviously way North American centric - sorry
960 : */
961 : Datum
962 8 : cash_words(PG_FUNCTION_ARGS)
963 : {
964 8 : Cash value = PG_GETARG_CASH(0);
965 : uint64 val;
966 : StringInfoData buf;
967 : text *res;
968 : Cash dollars;
969 : Cash m0;
970 : Cash m1;
971 : Cash m2;
972 : Cash m3;
973 : Cash m4;
974 : Cash m5;
975 : Cash m6;
976 :
977 8 : initStringInfo(&buf);
978 :
979 : /* work with positive numbers */
980 8 : if (value < 0)
981 : {
982 0 : value = -value;
983 0 : appendStringInfoString(&buf, "minus ");
984 : }
985 :
986 : /* Now treat as unsigned, to avoid trouble at INT_MIN */
987 8 : val = (uint64) value;
988 :
989 8 : dollars = val / INT64CONST(100);
990 8 : m0 = val % INT64CONST(100); /* cents */
991 8 : m1 = (val / INT64CONST(100)) % 1000; /* hundreds */
992 8 : m2 = (val / INT64CONST(100000)) % 1000; /* thousands */
993 8 : m3 = (val / INT64CONST(100000000)) % 1000; /* millions */
994 8 : m4 = (val / INT64CONST(100000000000)) % 1000; /* billions */
995 8 : m5 = (val / INT64CONST(100000000000000)) % 1000; /* trillions */
996 8 : m6 = (val / INT64CONST(100000000000000000)) % 1000; /* quadrillions */
997 :
998 8 : if (m6)
999 : {
1000 0 : append_num_word(&buf, m6);
1001 0 : appendStringInfoString(&buf, " quadrillion ");
1002 : }
1003 :
1004 8 : if (m5)
1005 : {
1006 0 : append_num_word(&buf, m5);
1007 0 : appendStringInfoString(&buf, " trillion ");
1008 : }
1009 :
1010 8 : if (m4)
1011 : {
1012 0 : append_num_word(&buf, m4);
1013 0 : appendStringInfoString(&buf, " billion ");
1014 : }
1015 :
1016 8 : if (m3)
1017 : {
1018 0 : append_num_word(&buf, m3);
1019 0 : appendStringInfoString(&buf, " million ");
1020 : }
1021 :
1022 8 : if (m2)
1023 : {
1024 0 : append_num_word(&buf, m2);
1025 0 : appendStringInfoString(&buf, " thousand ");
1026 : }
1027 :
1028 8 : if (m1)
1029 8 : append_num_word(&buf, m1);
1030 :
1031 8 : if (dollars == 0)
1032 0 : appendStringInfoString(&buf, "zero");
1033 :
1034 8 : appendStringInfoString(&buf, dollars == 1 ? " dollar and " : " dollars and ");
1035 8 : append_num_word(&buf, m0);
1036 8 : appendStringInfoString(&buf, m0 == 1 ? " cent" : " cents");
1037 :
1038 : /* capitalize output */
1039 8 : buf.data[0] = pg_ascii_toupper((unsigned char) buf.data[0]);
1040 :
1041 : /* return as text datum */
1042 8 : res = cstring_to_text_with_len(buf.data, buf.len);
1043 8 : pfree(buf.data);
1044 8 : PG_RETURN_TEXT_P(res);
1045 : }
1046 :
1047 :
1048 : /* cash_numeric()
1049 : * Convert cash to numeric.
1050 : */
1051 : Datum
1052 16 : cash_numeric(PG_FUNCTION_ARGS)
1053 : {
1054 16 : Cash money = PG_GETARG_CASH(0);
1055 : Datum result;
1056 : int fpoint;
1057 16 : struct lconv *lconvert = PGLC_localeconv();
1058 :
1059 : /* see comments about frac_digits in cash_in() */
1060 16 : fpoint = lconvert->frac_digits;
1061 16 : if (fpoint < 0 || fpoint > 10)
1062 16 : fpoint = 2;
1063 :
1064 : /* convert the integral money value to numeric */
1065 16 : result = NumericGetDatum(int64_to_numeric(money));
1066 :
1067 : /* scale appropriately, if needed */
1068 16 : if (fpoint > 0)
1069 : {
1070 : int64 scale;
1071 : int i;
1072 : Datum numeric_scale;
1073 : Datum quotient;
1074 :
1075 : /* compute required scale factor */
1076 16 : scale = 1;
1077 48 : for (i = 0; i < fpoint; i++)
1078 32 : scale *= 10;
1079 16 : numeric_scale = NumericGetDatum(int64_to_numeric(scale));
1080 :
1081 : /*
1082 : * Given integral inputs approaching INT64_MAX, select_div_scale()
1083 : * might choose a result scale of zero, causing loss of fractional
1084 : * digits in the quotient. We can ensure an exact result by setting
1085 : * the dscale of either input to be at least as large as the desired
1086 : * result scale. numeric_round() will do that for us.
1087 : */
1088 16 : numeric_scale = DirectFunctionCall2(numeric_round,
1089 : numeric_scale,
1090 : Int32GetDatum(fpoint));
1091 :
1092 : /* Now we can safely divide ... */
1093 16 : quotient = DirectFunctionCall2(numeric_div, result, numeric_scale);
1094 :
1095 : /* ... and forcibly round to exactly the intended number of digits */
1096 16 : result = DirectFunctionCall2(numeric_round,
1097 : quotient,
1098 : Int32GetDatum(fpoint));
1099 : }
1100 :
1101 16 : PG_RETURN_DATUM(result);
1102 : }
1103 :
1104 : /* numeric_cash()
1105 : * Convert numeric to cash.
1106 : */
1107 : Datum
1108 8 : numeric_cash(PG_FUNCTION_ARGS)
1109 : {
1110 8 : Numeric amount = PG_GETARG_NUMERIC(0);
1111 : Cash result;
1112 : int fpoint;
1113 : int64 scale;
1114 : int i;
1115 : Numeric numeric_scale;
1116 8 : struct lconv *lconvert = PGLC_localeconv();
1117 :
1118 : /* see comments about frac_digits in cash_in() */
1119 8 : fpoint = lconvert->frac_digits;
1120 8 : if (fpoint < 0 || fpoint > 10)
1121 8 : fpoint = 2;
1122 :
1123 : /* compute required scale factor */
1124 8 : scale = 1;
1125 24 : for (i = 0; i < fpoint; i++)
1126 16 : scale *= 10;
1127 :
1128 : /* multiply the input amount by scale factor */
1129 8 : numeric_scale = int64_to_numeric(scale);
1130 :
1131 8 : amount = numeric_mul_safe(amount, numeric_scale, fcinfo->context);
1132 8 : if (unlikely(SOFT_ERROR_OCCURRED(fcinfo->context)))
1133 0 : PG_RETURN_NULL();
1134 :
1135 : /* note that numeric_int8 will round to nearest integer for us */
1136 8 : result = numeric_int8_safe(amount, fcinfo->context);
1137 8 : if (unlikely(SOFT_ERROR_OCCURRED(fcinfo->context)))
1138 0 : PG_RETURN_NULL();
1139 :
1140 8 : PG_RETURN_CASH(result);
1141 : }
1142 :
1143 : /* int4_cash()
1144 : * Convert int4 (int) to cash
1145 : */
1146 : Datum
1147 28 : int4_cash(PG_FUNCTION_ARGS)
1148 : {
1149 28 : int32 amount = PG_GETARG_INT32(0);
1150 : Cash result;
1151 : int fpoint;
1152 : int64 scale;
1153 : int i;
1154 28 : struct lconv *lconvert = PGLC_localeconv();
1155 :
1156 : /* see comments about frac_digits in cash_in() */
1157 28 : fpoint = lconvert->frac_digits;
1158 28 : if (fpoint < 0 || fpoint > 10)
1159 28 : fpoint = 2;
1160 :
1161 : /* compute required scale factor */
1162 28 : scale = 1;
1163 84 : for (i = 0; i < fpoint; i++)
1164 56 : scale *= 10;
1165 :
1166 : /* compute amount * scale, checking for overflow */
1167 28 : if (unlikely(pg_mul_s64_overflow(amount, scale, &result)))
1168 0 : ereturn(fcinfo->context, (Datum) 0,
1169 : errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
1170 : errmsg("bigint out of range"));
1171 :
1172 28 : PG_RETURN_CASH(result);
1173 : }
1174 :
1175 : /* int8_cash()
1176 : * Convert int8 (bigint) to cash
1177 : */
1178 : Datum
1179 16 : int8_cash(PG_FUNCTION_ARGS)
1180 : {
1181 16 : int64 amount = PG_GETARG_INT64(0);
1182 : Cash result;
1183 : int fpoint;
1184 : int64 scale;
1185 : int i;
1186 16 : struct lconv *lconvert = PGLC_localeconv();
1187 :
1188 : /* see comments about frac_digits in cash_in() */
1189 16 : fpoint = lconvert->frac_digits;
1190 16 : if (fpoint < 0 || fpoint > 10)
1191 16 : fpoint = 2;
1192 :
1193 : /* compute required scale factor */
1194 16 : scale = 1;
1195 48 : for (i = 0; i < fpoint; i++)
1196 32 : scale *= 10;
1197 :
1198 : /* compute amount * scale, checking for overflow */
1199 16 : if (unlikely(pg_mul_s64_overflow(amount, scale, &result)))
1200 0 : ereturn(fcinfo->context, (Datum) 0,
1201 : errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
1202 : errmsg("bigint out of range"));
1203 :
1204 16 : PG_RETURN_CASH(result);
1205 : }
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