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 "utils/builtins.h"
28 : #include "utils/cash.h"
29 : #include "utils/numeric.h"
30 : #include "utils/pg_locale.h"
31 :
32 :
33 : /*************************************************************************
34 : * Private routines
35 : ************************************************************************/
36 :
37 : static const char *
38 24 : num_word(Cash value)
39 : {
40 : static char buf[128];
41 : static const char *const small[] = {
42 : "zero", "one", "two", "three", "four", "five", "six", "seven",
43 : "eight", "nine", "ten", "eleven", "twelve", "thirteen", "fourteen",
44 : "fifteen", "sixteen", "seventeen", "eighteen", "nineteen", "twenty",
45 : "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety"
46 : };
47 24 : const char *const *big = small + 18;
48 24 : int tu = value % 100;
49 :
50 : /* deal with the simple cases first */
51 24 : if (value <= 20)
52 6 : return small[value];
53 :
54 : /* is it an even multiple of 100? */
55 18 : if (!tu)
56 : {
57 0 : sprintf(buf, "%s hundred", small[value / 100]);
58 0 : return buf;
59 : }
60 :
61 : /* more than 99? */
62 18 : if (value > 99)
63 : {
64 : /* is it an even multiple of 10 other than 10? */
65 12 : if (value % 10 == 0 && tu > 10)
66 0 : sprintf(buf, "%s hundred %s",
67 0 : small[value / 100], big[tu / 10]);
68 12 : else if (tu < 20)
69 0 : sprintf(buf, "%s hundred and %s",
70 0 : small[value / 100], small[tu]);
71 : else
72 12 : sprintf(buf, "%s hundred %s %s",
73 12 : small[value / 100], big[tu / 10], small[tu % 10]);
74 : }
75 : else
76 : {
77 : /* is it an even multiple of 10 other than 10? */
78 6 : if (value % 10 == 0 && tu > 10)
79 0 : sprintf(buf, "%s", big[tu / 10]);
80 6 : else if (tu < 20)
81 0 : sprintf(buf, "%s", small[tu]);
82 : else
83 6 : sprintf(buf, "%s %s", big[tu / 10], small[tu % 10]);
84 : }
85 :
86 18 : return buf;
87 : } /* num_word() */
88 :
89 : /* cash_in()
90 : * Convert a string to a cash data type.
91 : * Format is [$]###[,]###[.##]
92 : * Examples: 123.45 $123.45 $123,456.78
93 : *
94 : */
95 : Datum
96 1540 : cash_in(PG_FUNCTION_ARGS)
97 : {
98 1540 : char *str = PG_GETARG_CSTRING(0);
99 1540 : Node *escontext = fcinfo->context;
100 : Cash result;
101 1540 : Cash value = 0;
102 1540 : Cash dec = 0;
103 1540 : Cash sgn = 1;
104 1540 : bool seen_dot = false;
105 1540 : const char *s = str;
106 : int fpoint;
107 : char dsymbol;
108 : const char *ssymbol,
109 : *psymbol,
110 : *nsymbol,
111 : *csymbol;
112 1540 : struct lconv *lconvert = PGLC_localeconv();
113 :
114 : /*
115 : * frac_digits will be CHAR_MAX in some locales, notably C. However, just
116 : * testing for == CHAR_MAX is risky, because of compilers like gcc that
117 : * "helpfully" let you alter the platform-standard definition of whether
118 : * char is signed or not. If we are so unfortunate as to get compiled
119 : * with a nonstandard -fsigned-char or -funsigned-char switch, then our
120 : * idea of CHAR_MAX will not agree with libc's. The safest course is not
121 : * to test for CHAR_MAX at all, but to impose a range check for plausible
122 : * frac_digits values.
123 : */
124 1540 : fpoint = lconvert->frac_digits;
125 1540 : if (fpoint < 0 || fpoint > 10)
126 1540 : fpoint = 2; /* best guess in this case, I think */
127 :
128 : /* we restrict dsymbol to be a single byte, but not the other symbols */
129 1540 : if (*lconvert->mon_decimal_point != '\0' &&
130 0 : lconvert->mon_decimal_point[1] == '\0')
131 0 : dsymbol = *lconvert->mon_decimal_point;
132 : else
133 1540 : dsymbol = '.';
134 1540 : if (*lconvert->mon_thousands_sep != '\0')
135 0 : ssymbol = lconvert->mon_thousands_sep;
136 : else /* ssymbol should not equal dsymbol */
137 1540 : ssymbol = (dsymbol != ',') ? "," : ".";
138 1540 : csymbol = (*lconvert->currency_symbol != '\0') ? lconvert->currency_symbol : "$";
139 1540 : psymbol = (*lconvert->positive_sign != '\0') ? lconvert->positive_sign : "+";
140 1540 : nsymbol = (*lconvert->negative_sign != '\0') ? lconvert->negative_sign : "-";
141 :
142 : #ifdef CASHDEBUG
143 : printf("cashin- precision '%d'; decimal '%c'; thousands '%s'; currency '%s'; positive '%s'; negative '%s'\n",
144 : fpoint, dsymbol, ssymbol, csymbol, psymbol, nsymbol);
145 : #endif
146 :
147 : /* we need to add all sorts of checking here. For now just */
148 : /* strip all leading whitespace and any leading currency symbol */
149 1540 : while (isspace((unsigned char) *s))
150 0 : s++;
151 1540 : if (strncmp(s, csymbol, strlen(csymbol)) == 0)
152 120 : s += strlen(csymbol);
153 1540 : while (isspace((unsigned char) *s))
154 0 : s++;
155 :
156 : #ifdef CASHDEBUG
157 : printf("cashin- string is '%s'\n", s);
158 : #endif
159 :
160 : /* a leading minus or paren signifies a negative number */
161 : /* again, better heuristics needed */
162 : /* XXX - doesn't properly check for balanced parens - djmc */
163 1540 : if (strncmp(s, nsymbol, strlen(nsymbol)) == 0)
164 : {
165 610 : sgn = -1;
166 610 : s += strlen(nsymbol);
167 : }
168 930 : else if (*s == '(')
169 : {
170 12 : sgn = -1;
171 12 : s++;
172 : }
173 918 : else if (strncmp(s, psymbol, strlen(psymbol)) == 0)
174 0 : s += strlen(psymbol);
175 :
176 : #ifdef CASHDEBUG
177 : printf("cashin- string is '%s'\n", s);
178 : #endif
179 :
180 : /* allow whitespace and currency symbol after the sign, too */
181 1540 : while (isspace((unsigned char) *s))
182 0 : s++;
183 1540 : if (strncmp(s, csymbol, strlen(csymbol)) == 0)
184 6 : s += strlen(csymbol);
185 1540 : while (isspace((unsigned char) *s))
186 0 : s++;
187 :
188 : #ifdef CASHDEBUG
189 : printf("cashin- string is '%s'\n", s);
190 : #endif
191 :
192 : /*
193 : * We accumulate the absolute amount in "value" and then apply the sign at
194 : * the end. (The sign can appear before or after the digits, so it would
195 : * be more complicated to do otherwise.) Because of the larger range of
196 : * negative signed integers, we build "value" in the negative and then
197 : * flip the sign at the end, catching most-negative-number overflow if
198 : * necessary.
199 : */
200 :
201 15184 : for (; *s; s++)
202 : {
203 : /*
204 : * We look for digits as long as we have found less than the required
205 : * number of decimal places.
206 : */
207 13728 : if (isdigit((unsigned char) *s) && (!seen_dot || dec < fpoint))
208 12238 : {
209 12256 : int8 digit = *s - '0';
210 :
211 24500 : if (pg_mul_s64_overflow(value, 10, &value) ||
212 12244 : pg_sub_s64_overflow(value, digit, &value))
213 18 : ereturn(escontext, (Datum) 0,
214 : (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
215 : errmsg("value \"%s\" is out of range for type %s",
216 : str, "money")));
217 :
218 12238 : if (seen_dot)
219 2782 : dec++;
220 : }
221 : /* decimal point? then start counting fractions... */
222 1472 : else if (*s == dsymbol && !seen_dot)
223 : {
224 1400 : seen_dot = true;
225 : }
226 : /* ignore if "thousands" separator, else we're done */
227 72 : else if (strncmp(s, ssymbol, strlen(ssymbol)) == 0)
228 6 : s += strlen(ssymbol) - 1;
229 : else
230 66 : break;
231 : }
232 :
233 : /* round off if there's another digit */
234 1522 : if (isdigit((unsigned char) *s) && *s >= '5')
235 : {
236 : /* remember we build the value in the negative */
237 30 : if (pg_sub_s64_overflow(value, 1, &value))
238 6 : ereturn(escontext, (Datum) 0,
239 : (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
240 : errmsg("value \"%s\" is out of range for type %s",
241 : str, "money")));
242 : }
243 :
244 : /* adjust for less than required decimal places */
245 1760 : for (; dec < fpoint; dec++)
246 : {
247 268 : if (pg_mul_s64_overflow(value, 10, &value))
248 24 : ereturn(escontext, (Datum) 0,
249 : (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
250 : errmsg("value \"%s\" is out of range for type %s",
251 : str, "money")));
252 : }
253 :
254 : /*
255 : * should only be trailing digits followed by whitespace, right paren,
256 : * trailing sign, and/or trailing currency symbol
257 : */
258 1528 : while (isdigit((unsigned char) *s))
259 36 : s++;
260 :
261 1504 : while (*s)
262 : {
263 24 : if (isspace((unsigned char) *s) || *s == ')')
264 12 : s++;
265 12 : else if (strncmp(s, nsymbol, strlen(nsymbol)) == 0)
266 : {
267 0 : sgn = -1;
268 0 : s += strlen(nsymbol);
269 : }
270 12 : else if (strncmp(s, psymbol, strlen(psymbol)) == 0)
271 0 : s += strlen(psymbol);
272 12 : else if (strncmp(s, csymbol, strlen(csymbol)) == 0)
273 0 : s += strlen(csymbol);
274 : else
275 12 : ereturn(escontext, (Datum) 0,
276 : (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
277 : errmsg("invalid input syntax for type %s: \"%s\"",
278 : "money", str)));
279 : }
280 :
281 : /*
282 : * If the value is supposed to be positive, flip the sign, but check for
283 : * the most negative number.
284 : */
285 1480 : if (sgn > 0)
286 : {
287 882 : if (value == PG_INT64_MIN)
288 12 : ereturn(escontext, (Datum) 0,
289 : (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
290 : errmsg("value \"%s\" is out of range for type %s",
291 : str, "money")));
292 870 : result = -value;
293 : }
294 : else
295 598 : result = value;
296 :
297 : #ifdef CASHDEBUG
298 : printf("cashin- result is " INT64_FORMAT "\n", result);
299 : #endif
300 :
301 1468 : PG_RETURN_CASH(result);
302 : }
303 :
304 :
305 : /* cash_out()
306 : * Function to convert cash to a dollars and cents representation, using
307 : * the lc_monetary locale's formatting.
308 : */
309 : Datum
310 416 : cash_out(PG_FUNCTION_ARGS)
311 : {
312 416 : Cash value = PG_GETARG_CASH(0);
313 : char *result;
314 : char buf[128];
315 : char *bufptr;
316 : int digit_pos;
317 : int points,
318 : mon_group;
319 : char dsymbol;
320 : const char *ssymbol,
321 : *csymbol,
322 : *signsymbol;
323 : char sign_posn,
324 : cs_precedes,
325 : sep_by_space;
326 416 : struct lconv *lconvert = PGLC_localeconv();
327 :
328 : /* see comments about frac_digits in cash_in() */
329 416 : points = lconvert->frac_digits;
330 416 : if (points < 0 || points > 10)
331 416 : points = 2; /* best guess in this case, I think */
332 :
333 : /*
334 : * As with frac_digits, must apply a range check to mon_grouping to avoid
335 : * being fooled by variant CHAR_MAX values.
336 : */
337 416 : mon_group = *lconvert->mon_grouping;
338 416 : if (mon_group <= 0 || mon_group > 6)
339 416 : mon_group = 3;
340 :
341 : /* we restrict dsymbol to be a single byte, but not the other symbols */
342 416 : if (*lconvert->mon_decimal_point != '\0' &&
343 0 : lconvert->mon_decimal_point[1] == '\0')
344 0 : dsymbol = *lconvert->mon_decimal_point;
345 : else
346 416 : dsymbol = '.';
347 416 : if (*lconvert->mon_thousands_sep != '\0')
348 0 : ssymbol = lconvert->mon_thousands_sep;
349 : else /* ssymbol should not equal dsymbol */
350 416 : ssymbol = (dsymbol != ',') ? "," : ".";
351 416 : csymbol = (*lconvert->currency_symbol != '\0') ? lconvert->currency_symbol : "$";
352 :
353 416 : if (value < 0)
354 : {
355 : /* make the amount positive for digit-reconstruction loop */
356 86 : value = -value;
357 : /* set up formatting data */
358 86 : signsymbol = (*lconvert->negative_sign != '\0') ? lconvert->negative_sign : "-";
359 86 : sign_posn = lconvert->n_sign_posn;
360 86 : cs_precedes = lconvert->n_cs_precedes;
361 86 : sep_by_space = lconvert->n_sep_by_space;
362 : }
363 : else
364 : {
365 330 : signsymbol = lconvert->positive_sign;
366 330 : sign_posn = lconvert->p_sign_posn;
367 330 : cs_precedes = lconvert->p_cs_precedes;
368 330 : sep_by_space = lconvert->p_sep_by_space;
369 : }
370 :
371 : /* we build the digits+decimal-point+sep string right-to-left in buf[] */
372 416 : bufptr = buf + sizeof(buf) - 1;
373 416 : *bufptr = '\0';
374 :
375 : /*
376 : * Generate digits till there are no non-zero digits left and we emitted
377 : * at least one to the left of the decimal point. digit_pos is the
378 : * current digit position, with zero as the digit just left of the decimal
379 : * point, increasing to the right.
380 : */
381 416 : digit_pos = points;
382 : do
383 : {
384 3288 : if (points && digit_pos == 0)
385 : {
386 : /* insert decimal point, but not if value cannot be fractional */
387 416 : *(--bufptr) = dsymbol;
388 : }
389 2872 : else if (digit_pos < 0 && (digit_pos % mon_group) == 0)
390 : {
391 : /* insert thousands sep, but only to left of radix point */
392 530 : bufptr -= strlen(ssymbol);
393 530 : memcpy(bufptr, ssymbol, strlen(ssymbol));
394 : }
395 :
396 3288 : *(--bufptr) = ((uint64) value % 10) + '0';
397 3288 : value = ((uint64) value) / 10;
398 3288 : digit_pos--;
399 3288 : } while (value || digit_pos >= 0);
400 :
401 : /*----------
402 : * Now, attach currency symbol and sign symbol in the correct order.
403 : *
404 : * The POSIX spec defines these values controlling this code:
405 : *
406 : * p/n_sign_posn:
407 : * 0 Parentheses enclose the quantity and the currency_symbol.
408 : * 1 The sign string precedes the quantity and the currency_symbol.
409 : * 2 The sign string succeeds the quantity and the currency_symbol.
410 : * 3 The sign string precedes the currency_symbol.
411 : * 4 The sign string succeeds the currency_symbol.
412 : *
413 : * p/n_cs_precedes: 0 means currency symbol after value, else before it.
414 : *
415 : * p/n_sep_by_space:
416 : * 0 No <space> separates the currency symbol and value.
417 : * 1 If the currency symbol and sign string are adjacent, a <space>
418 : * separates them from the value; otherwise, a <space> separates
419 : * the currency symbol from the value.
420 : * 2 If the currency symbol and sign string are adjacent, a <space>
421 : * separates them; otherwise, a <space> separates the sign string
422 : * from the value.
423 : *----------
424 : */
425 416 : switch (sign_posn)
426 : {
427 0 : case 0:
428 0 : if (cs_precedes)
429 0 : result = psprintf("(%s%s%s)",
430 : csymbol,
431 : (sep_by_space == 1) ? " " : "",
432 : bufptr);
433 : else
434 0 : result = psprintf("(%s%s%s)",
435 : bufptr,
436 : (sep_by_space == 1) ? " " : "",
437 : csymbol);
438 0 : break;
439 416 : case 1:
440 : default:
441 416 : if (cs_precedes)
442 416 : result = psprintf("%s%s%s%s%s",
443 : signsymbol,
444 : (sep_by_space == 2) ? " " : "",
445 : csymbol,
446 : (sep_by_space == 1) ? " " : "",
447 : bufptr);
448 : else
449 0 : result = psprintf("%s%s%s%s%s",
450 : signsymbol,
451 : (sep_by_space == 2) ? " " : "",
452 : bufptr,
453 : (sep_by_space == 1) ? " " : "",
454 : csymbol);
455 416 : break;
456 0 : case 2:
457 0 : if (cs_precedes)
458 0 : result = psprintf("%s%s%s%s%s",
459 : csymbol,
460 : (sep_by_space == 1) ? " " : "",
461 : bufptr,
462 : (sep_by_space == 2) ? " " : "",
463 : signsymbol);
464 : else
465 0 : result = psprintf("%s%s%s%s%s",
466 : bufptr,
467 : (sep_by_space == 1) ? " " : "",
468 : csymbol,
469 : (sep_by_space == 2) ? " " : "",
470 : signsymbol);
471 0 : break;
472 0 : case 3:
473 0 : if (cs_precedes)
474 0 : result = psprintf("%s%s%s%s%s",
475 : signsymbol,
476 : (sep_by_space == 2) ? " " : "",
477 : csymbol,
478 : (sep_by_space == 1) ? " " : "",
479 : bufptr);
480 : else
481 0 : result = psprintf("%s%s%s%s%s",
482 : bufptr,
483 : (sep_by_space == 1) ? " " : "",
484 : signsymbol,
485 : (sep_by_space == 2) ? " " : "",
486 : csymbol);
487 0 : break;
488 0 : case 4:
489 0 : if (cs_precedes)
490 0 : result = psprintf("%s%s%s%s%s",
491 : csymbol,
492 : (sep_by_space == 2) ? " " : "",
493 : signsymbol,
494 : (sep_by_space == 1) ? " " : "",
495 : bufptr);
496 : else
497 0 : result = psprintf("%s%s%s%s%s",
498 : bufptr,
499 : (sep_by_space == 1) ? " " : "",
500 : csymbol,
501 : (sep_by_space == 2) ? " " : "",
502 : signsymbol);
503 0 : break;
504 : }
505 :
506 416 : PG_RETURN_CSTRING(result);
507 : }
508 :
509 : /*
510 : * cash_recv - converts external binary format to cash
511 : */
512 : Datum
513 0 : cash_recv(PG_FUNCTION_ARGS)
514 : {
515 0 : StringInfo buf = (StringInfo) PG_GETARG_POINTER(0);
516 :
517 0 : PG_RETURN_CASH((Cash) pq_getmsgint64(buf));
518 : }
519 :
520 : /*
521 : * cash_send - converts cash to binary format
522 : */
523 : Datum
524 0 : cash_send(PG_FUNCTION_ARGS)
525 : {
526 0 : Cash arg1 = PG_GETARG_CASH(0);
527 : StringInfoData buf;
528 :
529 0 : pq_begintypsend(&buf);
530 0 : pq_sendint64(&buf, arg1);
531 0 : PG_RETURN_BYTEA_P(pq_endtypsend(&buf));
532 : }
533 :
534 : /*
535 : * Comparison functions
536 : */
537 :
538 : Datum
539 1100 : cash_eq(PG_FUNCTION_ARGS)
540 : {
541 1100 : Cash c1 = PG_GETARG_CASH(0);
542 1100 : Cash c2 = PG_GETARG_CASH(1);
543 :
544 1100 : PG_RETURN_BOOL(c1 == c2);
545 : }
546 :
547 : Datum
548 12 : cash_ne(PG_FUNCTION_ARGS)
549 : {
550 12 : Cash c1 = PG_GETARG_CASH(0);
551 12 : Cash c2 = PG_GETARG_CASH(1);
552 :
553 12 : PG_RETURN_BOOL(c1 != c2);
554 : }
555 :
556 : Datum
557 1098 : cash_lt(PG_FUNCTION_ARGS)
558 : {
559 1098 : Cash c1 = PG_GETARG_CASH(0);
560 1098 : Cash c2 = PG_GETARG_CASH(1);
561 :
562 1098 : PG_RETURN_BOOL(c1 < c2);
563 : }
564 :
565 : Datum
566 1098 : cash_le(PG_FUNCTION_ARGS)
567 : {
568 1098 : Cash c1 = PG_GETARG_CASH(0);
569 1098 : Cash c2 = PG_GETARG_CASH(1);
570 :
571 1098 : PG_RETURN_BOOL(c1 <= c2);
572 : }
573 :
574 : Datum
575 1098 : cash_gt(PG_FUNCTION_ARGS)
576 : {
577 1098 : Cash c1 = PG_GETARG_CASH(0);
578 1098 : Cash c2 = PG_GETARG_CASH(1);
579 :
580 1098 : PG_RETURN_BOOL(c1 > c2);
581 : }
582 :
583 : Datum
584 1098 : cash_ge(PG_FUNCTION_ARGS)
585 : {
586 1098 : Cash c1 = PG_GETARG_CASH(0);
587 1098 : Cash c2 = PG_GETARG_CASH(1);
588 :
589 1098 : PG_RETURN_BOOL(c1 >= c2);
590 : }
591 :
592 : Datum
593 1318 : cash_cmp(PG_FUNCTION_ARGS)
594 : {
595 1318 : Cash c1 = PG_GETARG_CASH(0);
596 1318 : Cash c2 = PG_GETARG_CASH(1);
597 :
598 1318 : if (c1 > c2)
599 1122 : PG_RETURN_INT32(1);
600 196 : else if (c1 == c2)
601 14 : PG_RETURN_INT32(0);
602 : else
603 182 : PG_RETURN_INT32(-1);
604 : }
605 :
606 :
607 : /* cash_pl()
608 : * Add two cash values.
609 : */
610 : Datum
611 24 : cash_pl(PG_FUNCTION_ARGS)
612 : {
613 24 : Cash c1 = PG_GETARG_CASH(0);
614 24 : Cash c2 = PG_GETARG_CASH(1);
615 : Cash result;
616 :
617 24 : result = c1 + c2;
618 :
619 24 : PG_RETURN_CASH(result);
620 : }
621 :
622 :
623 : /* cash_mi()
624 : * Subtract two cash values.
625 : */
626 : Datum
627 12 : cash_mi(PG_FUNCTION_ARGS)
628 : {
629 12 : Cash c1 = PG_GETARG_CASH(0);
630 12 : Cash c2 = PG_GETARG_CASH(1);
631 : Cash result;
632 :
633 12 : result = c1 - c2;
634 :
635 12 : PG_RETURN_CASH(result);
636 : }
637 :
638 :
639 : /* cash_div_cash()
640 : * Divide cash by cash, returning float8.
641 : */
642 : Datum
643 6 : cash_div_cash(PG_FUNCTION_ARGS)
644 : {
645 6 : Cash dividend = PG_GETARG_CASH(0);
646 6 : Cash divisor = PG_GETARG_CASH(1);
647 : float8 quotient;
648 :
649 6 : if (divisor == 0)
650 0 : ereport(ERROR,
651 : (errcode(ERRCODE_DIVISION_BY_ZERO),
652 : errmsg("division by zero")));
653 :
654 6 : quotient = (float8) dividend / (float8) divisor;
655 6 : PG_RETURN_FLOAT8(quotient);
656 : }
657 :
658 :
659 : /* cash_mul_flt8()
660 : * Multiply cash by float8.
661 : */
662 : Datum
663 6 : cash_mul_flt8(PG_FUNCTION_ARGS)
664 : {
665 6 : Cash c = PG_GETARG_CASH(0);
666 6 : float8 f = PG_GETARG_FLOAT8(1);
667 : Cash result;
668 :
669 6 : result = rint(c * f);
670 6 : PG_RETURN_CASH(result);
671 : }
672 :
673 :
674 : /* flt8_mul_cash()
675 : * Multiply float8 by cash.
676 : */
677 : Datum
678 6 : flt8_mul_cash(PG_FUNCTION_ARGS)
679 : {
680 6 : float8 f = PG_GETARG_FLOAT8(0);
681 6 : Cash c = PG_GETARG_CASH(1);
682 : Cash result;
683 :
684 6 : result = rint(f * c);
685 6 : PG_RETURN_CASH(result);
686 : }
687 :
688 :
689 : /* cash_div_flt8()
690 : * Divide cash by float8.
691 : */
692 : Datum
693 12 : cash_div_flt8(PG_FUNCTION_ARGS)
694 : {
695 12 : Cash c = PG_GETARG_CASH(0);
696 12 : float8 f = PG_GETARG_FLOAT8(1);
697 : Cash result;
698 :
699 12 : if (f == 0.0)
700 0 : ereport(ERROR,
701 : (errcode(ERRCODE_DIVISION_BY_ZERO),
702 : errmsg("division by zero")));
703 :
704 12 : result = rint(c / f);
705 12 : PG_RETURN_CASH(result);
706 : }
707 :
708 :
709 : /* cash_mul_flt4()
710 : * Multiply cash by float4.
711 : */
712 : Datum
713 6 : cash_mul_flt4(PG_FUNCTION_ARGS)
714 : {
715 6 : Cash c = PG_GETARG_CASH(0);
716 6 : float4 f = PG_GETARG_FLOAT4(1);
717 : Cash result;
718 :
719 6 : result = rint(c * (float8) f);
720 6 : PG_RETURN_CASH(result);
721 : }
722 :
723 :
724 : /* flt4_mul_cash()
725 : * Multiply float4 by cash.
726 : */
727 : Datum
728 6 : flt4_mul_cash(PG_FUNCTION_ARGS)
729 : {
730 6 : float4 f = PG_GETARG_FLOAT4(0);
731 6 : Cash c = PG_GETARG_CASH(1);
732 : Cash result;
733 :
734 6 : result = rint((float8) f * c);
735 6 : PG_RETURN_CASH(result);
736 : }
737 :
738 :
739 : /* cash_div_flt4()
740 : * Divide cash by float4.
741 : *
742 : */
743 : Datum
744 12 : cash_div_flt4(PG_FUNCTION_ARGS)
745 : {
746 12 : Cash c = PG_GETARG_CASH(0);
747 12 : float4 f = PG_GETARG_FLOAT4(1);
748 : Cash result;
749 :
750 12 : if (f == 0.0)
751 0 : ereport(ERROR,
752 : (errcode(ERRCODE_DIVISION_BY_ZERO),
753 : errmsg("division by zero")));
754 :
755 12 : result = rint(c / (float8) f);
756 12 : PG_RETURN_CASH(result);
757 : }
758 :
759 :
760 : /* cash_mul_int8()
761 : * Multiply cash by int8.
762 : */
763 : Datum
764 6 : cash_mul_int8(PG_FUNCTION_ARGS)
765 : {
766 6 : Cash c = PG_GETARG_CASH(0);
767 6 : int64 i = PG_GETARG_INT64(1);
768 : Cash result;
769 :
770 6 : result = c * i;
771 6 : PG_RETURN_CASH(result);
772 : }
773 :
774 :
775 : /* int8_mul_cash()
776 : * Multiply int8 by cash.
777 : */
778 : Datum
779 6 : int8_mul_cash(PG_FUNCTION_ARGS)
780 : {
781 6 : int64 i = PG_GETARG_INT64(0);
782 6 : Cash c = PG_GETARG_CASH(1);
783 : Cash result;
784 :
785 6 : result = i * c;
786 6 : PG_RETURN_CASH(result);
787 : }
788 :
789 : /* cash_div_int8()
790 : * Divide cash by 8-byte integer.
791 : */
792 : Datum
793 18 : cash_div_int8(PG_FUNCTION_ARGS)
794 : {
795 18 : Cash c = PG_GETARG_CASH(0);
796 18 : int64 i = PG_GETARG_INT64(1);
797 : Cash result;
798 :
799 18 : if (i == 0)
800 0 : ereport(ERROR,
801 : (errcode(ERRCODE_DIVISION_BY_ZERO),
802 : errmsg("division by zero")));
803 :
804 18 : result = c / i;
805 :
806 18 : PG_RETURN_CASH(result);
807 : }
808 :
809 :
810 : /* cash_mul_int4()
811 : * Multiply cash by int4.
812 : */
813 : Datum
814 6 : cash_mul_int4(PG_FUNCTION_ARGS)
815 : {
816 6 : Cash c = PG_GETARG_CASH(0);
817 6 : int32 i = PG_GETARG_INT32(1);
818 : Cash result;
819 :
820 6 : result = c * i;
821 6 : PG_RETURN_CASH(result);
822 : }
823 :
824 :
825 : /* int4_mul_cash()
826 : * Multiply int4 by cash.
827 : */
828 : Datum
829 6 : int4_mul_cash(PG_FUNCTION_ARGS)
830 : {
831 6 : int32 i = PG_GETARG_INT32(0);
832 6 : Cash c = PG_GETARG_CASH(1);
833 : Cash result;
834 :
835 6 : result = i * c;
836 6 : PG_RETURN_CASH(result);
837 : }
838 :
839 :
840 : /* cash_div_int4()
841 : * Divide cash by 4-byte integer.
842 : *
843 : */
844 : Datum
845 18 : cash_div_int4(PG_FUNCTION_ARGS)
846 : {
847 18 : Cash c = PG_GETARG_CASH(0);
848 18 : int32 i = PG_GETARG_INT32(1);
849 : Cash result;
850 :
851 18 : if (i == 0)
852 0 : ereport(ERROR,
853 : (errcode(ERRCODE_DIVISION_BY_ZERO),
854 : errmsg("division by zero")));
855 :
856 18 : result = c / i;
857 :
858 18 : PG_RETURN_CASH(result);
859 : }
860 :
861 :
862 : /* cash_mul_int2()
863 : * Multiply cash by int2.
864 : */
865 : Datum
866 6 : cash_mul_int2(PG_FUNCTION_ARGS)
867 : {
868 6 : Cash c = PG_GETARG_CASH(0);
869 6 : int16 s = PG_GETARG_INT16(1);
870 : Cash result;
871 :
872 6 : result = c * s;
873 6 : PG_RETURN_CASH(result);
874 : }
875 :
876 : /* int2_mul_cash()
877 : * Multiply int2 by cash.
878 : */
879 : Datum
880 6 : int2_mul_cash(PG_FUNCTION_ARGS)
881 : {
882 6 : int16 s = PG_GETARG_INT16(0);
883 6 : Cash c = PG_GETARG_CASH(1);
884 : Cash result;
885 :
886 6 : result = s * c;
887 6 : PG_RETURN_CASH(result);
888 : }
889 :
890 : /* cash_div_int2()
891 : * Divide cash by int2.
892 : *
893 : */
894 : Datum
895 18 : cash_div_int2(PG_FUNCTION_ARGS)
896 : {
897 18 : Cash c = PG_GETARG_CASH(0);
898 18 : int16 s = PG_GETARG_INT16(1);
899 : Cash result;
900 :
901 18 : if (s == 0)
902 0 : ereport(ERROR,
903 : (errcode(ERRCODE_DIVISION_BY_ZERO),
904 : errmsg("division by zero")));
905 :
906 18 : result = c / s;
907 18 : PG_RETURN_CASH(result);
908 : }
909 :
910 : /* cashlarger()
911 : * Return larger of two cash values.
912 : */
913 : Datum
914 6 : cashlarger(PG_FUNCTION_ARGS)
915 : {
916 6 : Cash c1 = PG_GETARG_CASH(0);
917 6 : Cash c2 = PG_GETARG_CASH(1);
918 : Cash result;
919 :
920 6 : result = (c1 > c2) ? c1 : c2;
921 :
922 6 : PG_RETURN_CASH(result);
923 : }
924 :
925 : /* cashsmaller()
926 : * Return smaller of two cash values.
927 : */
928 : Datum
929 6 : cashsmaller(PG_FUNCTION_ARGS)
930 : {
931 6 : Cash c1 = PG_GETARG_CASH(0);
932 6 : Cash c2 = PG_GETARG_CASH(1);
933 : Cash result;
934 :
935 6 : result = (c1 < c2) ? c1 : c2;
936 :
937 6 : PG_RETURN_CASH(result);
938 : }
939 :
940 : /* cash_words()
941 : * This converts an int4 as well but to a representation using words
942 : * Obviously way North American centric - sorry
943 : */
944 : Datum
945 12 : cash_words(PG_FUNCTION_ARGS)
946 : {
947 12 : Cash value = PG_GETARG_CASH(0);
948 : uint64 val;
949 : char buf[256];
950 12 : char *p = buf;
951 : Cash m0;
952 : Cash m1;
953 : Cash m2;
954 : Cash m3;
955 : Cash m4;
956 : Cash m5;
957 : Cash m6;
958 :
959 : /* work with positive numbers */
960 12 : if (value < 0)
961 : {
962 0 : value = -value;
963 0 : strcpy(buf, "minus ");
964 0 : p += 6;
965 : }
966 : else
967 12 : buf[0] = '\0';
968 :
969 : /* Now treat as unsigned, to avoid trouble at INT_MIN */
970 12 : val = (uint64) value;
971 :
972 12 : m0 = val % INT64CONST(100); /* cents */
973 12 : m1 = (val / INT64CONST(100)) % 1000; /* hundreds */
974 12 : m2 = (val / INT64CONST(100000)) % 1000; /* thousands */
975 12 : m3 = (val / INT64CONST(100000000)) % 1000; /* millions */
976 12 : m4 = (val / INT64CONST(100000000000)) % 1000; /* billions */
977 12 : m5 = (val / INT64CONST(100000000000000)) % 1000; /* trillions */
978 12 : m6 = (val / INT64CONST(100000000000000000)) % 1000; /* quadrillions */
979 :
980 12 : if (m6)
981 : {
982 0 : strcat(buf, num_word(m6));
983 0 : strcat(buf, " quadrillion ");
984 : }
985 :
986 12 : if (m5)
987 : {
988 0 : strcat(buf, num_word(m5));
989 0 : strcat(buf, " trillion ");
990 : }
991 :
992 12 : if (m4)
993 : {
994 0 : strcat(buf, num_word(m4));
995 0 : strcat(buf, " billion ");
996 : }
997 :
998 12 : if (m3)
999 : {
1000 0 : strcat(buf, num_word(m3));
1001 0 : strcat(buf, " million ");
1002 : }
1003 :
1004 12 : if (m2)
1005 : {
1006 0 : strcat(buf, num_word(m2));
1007 0 : strcat(buf, " thousand ");
1008 : }
1009 :
1010 12 : if (m1)
1011 12 : strcat(buf, num_word(m1));
1012 :
1013 12 : if (!*p)
1014 0 : strcat(buf, "zero");
1015 :
1016 12 : strcat(buf, (val / 100) == 1 ? " dollar and " : " dollars and ");
1017 12 : strcat(buf, num_word(m0));
1018 12 : strcat(buf, m0 == 1 ? " cent" : " cents");
1019 :
1020 : /* capitalize output */
1021 12 : buf[0] = pg_toupper((unsigned char) buf[0]);
1022 :
1023 : /* return as text datum */
1024 12 : PG_RETURN_TEXT_P(cstring_to_text(buf));
1025 : }
1026 :
1027 :
1028 : /* cash_numeric()
1029 : * Convert cash to numeric.
1030 : */
1031 : Datum
1032 24 : cash_numeric(PG_FUNCTION_ARGS)
1033 : {
1034 24 : Cash money = PG_GETARG_CASH(0);
1035 : Datum result;
1036 : int fpoint;
1037 24 : struct lconv *lconvert = PGLC_localeconv();
1038 :
1039 : /* see comments about frac_digits in cash_in() */
1040 24 : fpoint = lconvert->frac_digits;
1041 24 : if (fpoint < 0 || fpoint > 10)
1042 24 : fpoint = 2;
1043 :
1044 : /* convert the integral money value to numeric */
1045 24 : result = NumericGetDatum(int64_to_numeric(money));
1046 :
1047 : /* scale appropriately, if needed */
1048 24 : if (fpoint > 0)
1049 : {
1050 : int64 scale;
1051 : int i;
1052 : Datum numeric_scale;
1053 : Datum quotient;
1054 :
1055 : /* compute required scale factor */
1056 24 : scale = 1;
1057 72 : for (i = 0; i < fpoint; i++)
1058 48 : scale *= 10;
1059 24 : numeric_scale = NumericGetDatum(int64_to_numeric(scale));
1060 :
1061 : /*
1062 : * Given integral inputs approaching INT64_MAX, select_div_scale()
1063 : * might choose a result scale of zero, causing loss of fractional
1064 : * digits in the quotient. We can ensure an exact result by setting
1065 : * the dscale of either input to be at least as large as the desired
1066 : * result scale. numeric_round() will do that for us.
1067 : */
1068 24 : numeric_scale = DirectFunctionCall2(numeric_round,
1069 : numeric_scale,
1070 : Int32GetDatum(fpoint));
1071 :
1072 : /* Now we can safely divide ... */
1073 24 : quotient = DirectFunctionCall2(numeric_div, result, numeric_scale);
1074 :
1075 : /* ... and forcibly round to exactly the intended number of digits */
1076 24 : result = DirectFunctionCall2(numeric_round,
1077 : quotient,
1078 : Int32GetDatum(fpoint));
1079 : }
1080 :
1081 24 : PG_RETURN_DATUM(result);
1082 : }
1083 :
1084 : /* numeric_cash()
1085 : * Convert numeric to cash.
1086 : */
1087 : Datum
1088 12 : numeric_cash(PG_FUNCTION_ARGS)
1089 : {
1090 12 : Datum amount = PG_GETARG_DATUM(0);
1091 : Cash result;
1092 : int fpoint;
1093 : int64 scale;
1094 : int i;
1095 : Datum numeric_scale;
1096 12 : struct lconv *lconvert = PGLC_localeconv();
1097 :
1098 : /* see comments about frac_digits in cash_in() */
1099 12 : fpoint = lconvert->frac_digits;
1100 12 : if (fpoint < 0 || fpoint > 10)
1101 12 : fpoint = 2;
1102 :
1103 : /* compute required scale factor */
1104 12 : scale = 1;
1105 36 : for (i = 0; i < fpoint; i++)
1106 24 : scale *= 10;
1107 :
1108 : /* multiply the input amount by scale factor */
1109 12 : numeric_scale = NumericGetDatum(int64_to_numeric(scale));
1110 12 : amount = DirectFunctionCall2(numeric_mul, amount, numeric_scale);
1111 :
1112 : /* note that numeric_int8 will round to nearest integer for us */
1113 12 : result = DatumGetInt64(DirectFunctionCall1(numeric_int8, amount));
1114 :
1115 12 : PG_RETURN_CASH(result);
1116 : }
1117 :
1118 : /* int4_cash()
1119 : * Convert int4 (int) to cash
1120 : */
1121 : Datum
1122 42 : int4_cash(PG_FUNCTION_ARGS)
1123 : {
1124 42 : int32 amount = PG_GETARG_INT32(0);
1125 : Cash result;
1126 : int fpoint;
1127 : int64 scale;
1128 : int i;
1129 42 : struct lconv *lconvert = PGLC_localeconv();
1130 :
1131 : /* see comments about frac_digits in cash_in() */
1132 42 : fpoint = lconvert->frac_digits;
1133 42 : if (fpoint < 0 || fpoint > 10)
1134 42 : fpoint = 2;
1135 :
1136 : /* compute required scale factor */
1137 42 : scale = 1;
1138 126 : for (i = 0; i < fpoint; i++)
1139 84 : scale *= 10;
1140 :
1141 : /* compute amount * scale, checking for overflow */
1142 42 : result = DatumGetInt64(DirectFunctionCall2(int8mul, Int64GetDatum(amount),
1143 : Int64GetDatum(scale)));
1144 :
1145 42 : PG_RETURN_CASH(result);
1146 : }
1147 :
1148 : /* int8_cash()
1149 : * Convert int8 (bigint) to cash
1150 : */
1151 : Datum
1152 24 : int8_cash(PG_FUNCTION_ARGS)
1153 : {
1154 24 : int64 amount = PG_GETARG_INT64(0);
1155 : Cash result;
1156 : int fpoint;
1157 : int64 scale;
1158 : int i;
1159 24 : struct lconv *lconvert = PGLC_localeconv();
1160 :
1161 : /* see comments about frac_digits in cash_in() */
1162 24 : fpoint = lconvert->frac_digits;
1163 24 : if (fpoint < 0 || fpoint > 10)
1164 24 : fpoint = 2;
1165 :
1166 : /* compute required scale factor */
1167 24 : scale = 1;
1168 72 : for (i = 0; i < fpoint; i++)
1169 48 : scale *= 10;
1170 :
1171 : /* compute amount * scale, checking for overflow */
1172 24 : result = DatumGetInt64(DirectFunctionCall2(int8mul, Int64GetDatum(amount),
1173 : Int64GetDatum(scale)));
1174 :
1175 24 : PG_RETURN_CASH(result);
1176 : }
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