icuSources/samples/numfmt/capi.c

   1 /********************************************************************
   2  * COPYRIGHT:
   3  * Copyright (c) 1999-2002, International Business Machines Corporation and
   4  * others. All Rights Reserved.
   5  ********************************************************************/
   6
   7 #include "unicode/unum.h"
   8 #include "unicode/ustring.h"
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11
  12 static void uprintf(const UChar* str) {
  13     char buf[256];
  14     u_austrcpy(buf, str);
  15     printf("%s", buf);
  16 }
  17
  18 void capi() {
  19     UNumberFormat *fmt;
  20     UErrorCode status = U_ZERO_ERROR;
  21     /* The string "987654321.123" as UChars */
  22     UChar str[] = { 0x39, 0x38, 0x37, 0x36, 0x35, 0x34, 0x33,
  23                     0x32, 0x31, 0x30, 0x2E, 0x31, 0x32, 0x33, 0 };
  24     UChar buf[256];
  25     int32_t needed;
  26     double a;
  27
  28     /* Create a formatter for the US locale */
  29     fmt = unum_open(
  30           UNUM_DECIMAL,      /* style         */
  31           0,                 /* pattern       */
  32           0,                 /* patternLength */
  33           "en_US",           /* locale        */
  34           0,                 /* parseErr      */
  35           &status);
  36     if (U_FAILURE(status)) {
  37         printf("FAIL: unum_open\n");
  38         exit(1);
  39     }
  40
  41     /* Use the formatter to parse a number.  When using the C API,
  42        we have to specify whether we want a double or a long in advance.
  43
  44        We pass in NULL for the position pointer in order to get the
  45        default behavior which is to parse from the start. */
  46     a = unum_parseDouble(fmt, str, u_strlen(str), NULL, &status);
  47     if (U_FAILURE(status)) {
  48         printf("FAIL: unum_parseDouble\n");
  49         exit(1);
  50     }
  51
  52     /* Show the result */
  53     printf("unum_parseDouble(\"");
  54     uprintf(str);
  55     printf("\") => %g\n", a);
  56
  57     /* Use the formatter to format the same number back into a string
  58        in the US locale.  The return value is the buffer size needed.
  59        We're pretty sure we have enough space, but in a production
  60        application one would check this value.
  61
  62        We pass in NULL for the UFieldPosition pointer because we don't
  63        care to receive that data. */
  64     needed = unum_formatDouble(fmt, a, buf, 256, NULL, &status);
  65     if (U_FAILURE(status)) {
  66         printf("FAIL: format_parseDouble\n");
  67         exit(1);
  68     }
  69
  70     /* Show the result */
  71     printf("unum_formatDouble(%g) => \"", a);
  72     uprintf(buf);
  73     printf("\"\n");
  74
  75     /* Release the storage used by the formatter */
  76     unum_close(fmt);
  77 }