icuSources/io/sscanf.c

   1 /*
   2 ******************************************************************************
   3 *
   4 *   Copyright (C) 2000-2004, International Business Machines
   5 *   Corporation and others.  All Rights Reserved.
   6 *
   7 ******************************************************************************
   8 *
   9 * File sscanf.c
  10 *
  11 * Modification History:
  12 *
  13 *   Date        Name        Description
  14 *   02/08/00    george      Creation. Copied from uscanf.c
  15 ******************************************************************************
  16 */
  17
  18 #include "unicode/utypes.h"
  19
  20 #if !UCONFIG_NO_FORMATTING
  21
  22 #include "unicode/putil.h"
  23 #include "unicode/ustdio.h"
  24 #include "unicode/ustring.h"
  25 #include "uscanf.h"
  26 #include "ufile.h"
  27 #include "ufmt_cmn.h"
  28
  29 #include "cmemory.h"
  30 #include "cstring.h"
  31
  32
  33 U_CAPI int32_t U_EXPORT2
  34 u_sscanf(const UChar   *buffer,
  35          const char    *patternSpecification,
  36          ... )
  37 {
  38     va_list ap;
  39     int32_t converted;
  40
  41     va_start(ap, patternSpecification);
  42     converted = u_vsscanf(buffer, patternSpecification, ap);
  43     va_end(ap);
  44
  45     return converted;
  46 }
  47
  48 U_CAPI int32_t U_EXPORT2
  49 u_sscanf_u(const UChar    *buffer,
  50            const UChar    *patternSpecification,
  51            ... )
  52 {
  53     va_list ap;
  54     int32_t converted;
  55
  56     va_start(ap, patternSpecification);
  57     converted = u_vsscanf_u(buffer, patternSpecification, ap);
  58     va_end(ap);
  59
  60     return converted;
  61 }
  62
  63 U_CAPI int32_t  U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */
  64 u_vsscanf(const UChar   *buffer,
  65           const char    *patternSpecification,
  66           va_list        ap)
  67 {
  68     int32_t converted;
  69     UChar *pattern;
  70     UChar patBuffer[UFMT_DEFAULT_BUFFER_SIZE];
  71     int32_t size = (int32_t)uprv_strlen(patternSpecification) + 1;
  72
  73     /* convert from the default codepage to Unicode */
  74     if (size >= MAX_UCHAR_BUFFER_SIZE(patBuffer)) {
  75         pattern = (UChar *)uprv_malloc(size * sizeof(UChar));
  76         if(pattern == 0) {
  77             return 0;
  78         }
  79     }
  80     else {
  81         pattern = patBuffer;
  82     }
  83     u_charsToUChars(patternSpecification, pattern, size);
  84
  85     /* do the work */
  86     converted = u_vsscanf_u(buffer, pattern, ap);
  87
  88     /* clean up */
  89     if (pattern != patBuffer) {
  90         uprv_free(pattern);
  91     }
  92
  93     return converted;
  94 }
  95
  96 U_CAPI int32_t U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */
  97 u_vsscanf_u(const UChar *buffer,
  98             const UChar *patternSpecification,
  99             va_list     ap)
 100 {
 101     int32_t         converted;
 102     UFILE           inStr;
 103
 104     inStr.fConverter = NULL;
 105     inStr.fFile = NULL;
 106     inStr.fOwnFile = FALSE;
 107 #if !UCONFIG_NO_TRANSLITERATION
 108     inStr.fTranslit = NULL;
 109 #endif
 110     inStr.fUCBuffer[0] = 0;
 111     inStr.str.fBuffer = (UChar *)buffer;
 112     inStr.str.fPos = (UChar *)buffer;
 113     inStr.str.fLimit = buffer + u_strlen(buffer);
 114
 115     if(u_locbund_init(&inStr.str.fBundle, "en_US_POSIX") == 0) {
 116         return 0;
 117     }
 118
 119     converted = u_scanf_parse(&inStr, patternSpecification, ap);
 120
 121     u_locbund_close(&inStr.str.fBundle);
 122
 123     /* return # of items converted */
 124     return converted;
 125 }
 126
 127 #endif /* #if !UCONFIG_NO_FORMATTING */
 128