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The Tor Browser
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uscanf.cpp (2694B)

      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) 1998-2014, International Business Machines
      7 *   Corporation and others.  All Rights Reserved.
      8 *
      9 ******************************************************************************
     10 *
     11 * File uscanf.c
     12 *
     13 * Modification History:
     14 *
     15 *   Date        Name        Description
     16 *   12/02/98    stephen        Creation.
     17 *   03/13/99    stephen     Modified for new C API.
     18 ******************************************************************************
     19 */
     20 
     21 #include "unicode/utypes.h"
     22 
     23 #if !UCONFIG_NO_FORMATTING && !UCONFIG_NO_CONVERSION
     24 
     25 #include "unicode/putil.h"
     26 #include "unicode/ustdio.h"
     27 #include "unicode/ustring.h"
     28 #include "uscanf.h"
     29 #include "ufile.h"
     30 #include "ufmt_cmn.h"
     31 
     32 #include "cmemory.h"
     33 #include "cstring.h"
     34 
     35 
     36 U_CAPI int32_t U_EXPORT2
     37 u_fscanf(UFILE        *f,
     38         const char    *patternSpecification,
     39         ... )
     40 {
     41    va_list ap;
     42    int32_t converted;
     43 
     44    va_start(ap, patternSpecification);
     45    converted = u_vfscanf(f, patternSpecification, ap);
     46    va_end(ap);
     47 
     48    return converted;
     49 }
     50 
     51 U_CAPI int32_t U_EXPORT2
     52 u_fscanf_u(UFILE        *f,
     53           const char16_t *patternSpecification,
     54           ... )
     55 {
     56    va_list ap;
     57    int32_t converted;
     58 
     59    va_start(ap, patternSpecification);
     60    converted = u_vfscanf_u(f, patternSpecification, ap);
     61    va_end(ap);
     62 
     63    return converted;
     64 }
     65 
     66 U_CAPI int32_t  U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */
     67 u_vfscanf(UFILE        *f,
     68          const char    *patternSpecification,
     69          va_list        ap)
     70 {
     71    int32_t converted;
     72    char16_t *pattern;
     73    char16_t patBuffer[UFMT_DEFAULT_BUFFER_SIZE];
     74    int32_t size = (int32_t)uprv_strlen(patternSpecification) + 1;
     75 
     76    /* convert from the default codepage to Unicode */
     77    if (size >= MAX_UCHAR_BUFFER_SIZE(patBuffer)) {
     78        pattern = (char16_t *)uprv_malloc(size * sizeof(char16_t));
     79        if (pattern == nullptr) {
     80            return 0;
     81        }
     82    }
     83    else {
     84        pattern = patBuffer;
     85    }
     86    u_charsToUChars(patternSpecification, pattern, size);
     87 
     88    /* do the work */
     89    converted = u_vfscanf_u(f, pattern, ap);
     90 
     91    /* clean up */
     92    if (pattern != patBuffer) {
     93        uprv_free(pattern);
     94    }
     95 
     96    return converted;
     97 }
     98 
     99 U_CAPI int32_t  U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */
    100 u_vfscanf_u(UFILE       *f,
    101            const char16_t *patternSpecification,
    102            va_list     ap)
    103 {
    104    return u_scanf_parse(f, patternSpecification, ap);
    105 }
    106 
    107 #endif /* #if !UCONFIG_NO_FORMATTING */