fmtlocale.c (1358B) download
1/* Copyright (c) 2004 Google Inc.; see LICENSE */
2
3#include "fmt.h"
4#include "fmtdef.h"
5#include "plan9.h"
6
7#include <stdarg.h>
8#include <string.h>
9
10/*
11 * Fill in the internationalization stuff in the State structure.
12 * For nil arguments, provide the sensible defaults:
13 * decimal is a period
14 * thousands separator is a comma
15 * thousands are marked every three digits
16 */
17void fmtlocaleinit(Fmt* f, char* decimal, char* thousands, char* grouping) {
18 if (decimal == nil || decimal[0] == '\0')
19 decimal = ".";
20 if (thousands == nil)
21 thousands = ",";
22 if (grouping == nil)
23 grouping = "\3";
24 f->decimal = decimal;
25 f->thousands = thousands;
26 f->grouping = grouping;
27}
28
29/*
30 * We are about to emit a digit in e.g. %'d. If that digit would
31 * overflow a thousands (e.g.) grouping, tell the caller to emit
32 * the thousands separator. Always advance the digit counter
33 * and pointer into the grouping descriptor.
34 */
35int __needsep(int* ndig, char** grouping) {
36 int group;
37
38 (*ndig)++;
39 group = *(unsigned char*) *grouping;
40 /* CHAR_MAX means no further grouping. \0 means we got the empty string */
41 if (group == 0xFF || group == 0x7f || group == 0x00)
42 return 0;
43 if (*ndig > group) {
44 /* if we're at end of string, continue with this grouping; else advance */
45 if ((*grouping)[1] != '\0')
46 (*grouping)++;
47 *ndig = 1;
48 return 1;
49 }
50 return 0;
51}