icuSources/io/sscanf.cpp

   1 // © 2016 and later: Unicode, Inc. and others.
   2 // License & terms of use: http://www.unicode.org/copyright.html
   3 /*
   4 ******************************************************************************
   5 *
   6 *   Copyright (C) 2000-2014, International Business Machines
   7 *   Corporation and others.  All Rights Reserved.
   8 *
   9 ******************************************************************************
  10 *
  11 * File sscanf.c
  12 *
  13 * Modification History:
  14 *
  15 *   Date        Name        Description
  16 *   02/08/00    george      Creation. Copied from uscanf.c
  17 ******************************************************************************
  18 */
  19
  20 #include "unicode/utypes.h"
  21
  22 #if !UCONFIG_NO_FORMATTING && !UCONFIG_NO_CONVERSION
  23
  24 #include "unicode/putil.h"
  25 #include "unicode/ustdio.h"
  26 #include "unicode/ustring.h"
  27 #include "uscanf.h"
  28 #include "ufile.h"
  29 #include "ufmt_cmn.h"
  30
  31 #include "cmemory.h"
  32 #include "cstring.h"
  33
  34
  35 U_CAPI int32_t U_EXPORT2
  36 u_sscanf(const UChar   *buffer,
  37          const char    *patternSpecification,
  38          ... )
  39 {
  40     va_list ap;
  41     int32_t converted;
  42
  43     va_start(ap, patternSpecification);
  44     converted = u_vsscanf(buffer, patternSpecification, ap);
  45     va_end(ap);
  46
  47     return converted;
  48 }
  49
  50 U_CAPI int32_t U_EXPORT2
  51 u_sscanf_u(const UChar    *buffer,
  52            const UChar    *patternSpecification,
  53            ... )
  54 {
  55     va_list ap;
  56     int32_t converted;
  57
  58     va_start(ap, patternSpecification);
  59     converted = u_vsscanf_u(buffer, patternSpecification, ap);
  60     va_end(ap);
  61
  62     return converted;
  63 }
  64
  65 U_CAPI int32_t  U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */
  66 u_vsscanf(const UChar   *buffer,
  67           const char    *patternSpecification,
  68           va_list        ap)
  69 {
  70     int32_t converted;
  71     UChar *pattern;
  72     UChar patBuffer[UFMT_DEFAULT_BUFFER_SIZE];
  73     int32_t size = (int32_t)uprv_strlen(patternSpecification) + 1;
  74
  75     /* convert from the default codepage to Unicode */
  76     if (size >= (int32_t)MAX_UCHAR_BUFFER_SIZE(patBuffer)) {
  77         pattern = (UChar *)uprv_malloc(size * sizeof(UChar));
  78         if(pattern == 0) {
  79             return 0;
  80         }
  81     }
  82     else {
  83         pattern = patBuffer;
  84     }
  85     u_charsToUChars(patternSpecification, pattern, size);
  86
  87     /* do the work */
  88     converted = u_vsscanf_u(buffer, pattern, ap);
  89
  90     /* clean up */
  91     if (pattern != patBuffer) {
  92         uprv_free(pattern);
  93     }
  94
  95     return converted;
  96 }
  97
  98 U_CAPI int32_t U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */
  99 u_vsscanf_u(const UChar *buffer,
 100             const UChar *patternSpecification,
 101             va_list     ap)
 102 {
 103     int32_t         converted;
 104     UFILE           inStr;
 105
 106     inStr.fConverter = NULL;
 107     inStr.fFile = NULL;
 108     inStr.fOwnFile = FALSE;
 109 #if !UCONFIG_NO_TRANSLITERATION
 110     inStr.fTranslit = NULL;
 111 #endif
 112     inStr.fUCBuffer[0] = 0;
 113     inStr.str.fBuffer = (UChar *)buffer;
 114     inStr.str.fPos = (UChar *)buffer;
 115     inStr.str.fLimit = buffer + u_strlen(buffer);
 116
 117     if(u_locbund_init(&inStr.str.fBundle, "en_US_POSIX") == 0) {
 118         return 0;
 119     }
 120
 121     converted = u_scanf_parse(&inStr, patternSpecification, ap);
 122
 123     u_locbund_close(&inStr.str.fBundle);
 124
 125     /* return # of items converted */
 126     return converted;
 127 }
 128
 129 #endif /* #if !UCONFIG_NO_FORMATTING */
 130