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ntdll: Use an __ms_va_list in sscanf (Clang).
Signed-off-by: Charles Davis <cdavis5x@gmail.com>
This commit is contained in:
Charles Davis
Alexandre Julliard
parent
587733855b
commit
476d97b0ee
@ -24,6 +24,7 @@
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#include "wine/port.h"
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#include <ctype.h>
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#include <limits.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <stdio.h>
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@ -774,16 +775,601 @@ LONG __cdecl NTDLL_atol( const char *nptr )
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}
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/* helper function for *scanf. Returns the value of character c in the
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* given base, or -1 if the given character is not a digit of the base.
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*/
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static int char2digit( char c, int base )
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{
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if ((c >= '0' && c <= '9') && (c <= '0'+base-1)) return (c-'0');
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if (base <= 10) return -1;
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if ((c >= 'A') && (c <= 'Z') && (c <= 'A'+base-11)) return (c-'A'+10);
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if ((c >= 'a') && (c <= 'z') && (c <= 'a'+base-11)) return (c-'a'+10);
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return -1;
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}
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static int NTDLL_vsscanf( const char *str, const char *format, __ms_va_list ap)
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{
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int rd = 0, consumed = 0;
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int nch;
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if (!*format) return 0;
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nch = (consumed++, *str++);
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if (nch == '\0')
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return EOF;
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while (*format)
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{
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if (isspace( *format ))
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{
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/* skip whitespace */
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while ((nch != '\0') && isspace( nch ))
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nch = (consumed++, *str++);
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}
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else if (*format == '%')
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{
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int st = 0;
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BOOLEAN suppress = 0;
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int width = 0;
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int base;
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int h_prefix = 0;
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BOOLEAN l_prefix = FALSE;
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BOOLEAN L_prefix = FALSE;
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BOOLEAN w_prefix = FALSE;
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BOOLEAN I64_prefix = FALSE;
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BOOLEAN prefix_finished = FALSE;
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format++;
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/* a leading asterisk means 'suppress assignment of this field' */
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if (*format == '*')
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{
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format++;
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suppress = TRUE;
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}
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/* look for width specification */
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while (isdigit( *format ))
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{
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width *= 10;
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width += *format++ - '0';
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}
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if (width == 0) width = -1; /* no width spec seen */
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/* read prefix (if any) */
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while (!prefix_finished)
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{
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switch (*format)
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{
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case 'h': h_prefix++; break;
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case 'l':
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if (*(format+1) == 'l')
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{
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I64_prefix = TRUE;
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format++;
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}
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l_prefix = TRUE;
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break;
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case 'w': w_prefix = TRUE; break;
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case 'L': L_prefix = TRUE; break;
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case 'I':
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if (*(format + 1) == '6' &&
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*(format + 2) == '4')
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{
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I64_prefix = TRUE;
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format += 2;
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}
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break;
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default:
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prefix_finished = TRUE;
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}
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if (!prefix_finished) format++;
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}
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/* read type */
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switch (*format)
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{
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case 'p':
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case 'P': /* pointer. */
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if (sizeof(void *) == sizeof(LONGLONG)) I64_prefix = TRUE;
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/* fall through */
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case 'x':
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case 'X': /* hexadecimal integer. */
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base = 16;
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goto number;
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case 'o': /* octal integer */
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base = 8;
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goto number;
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case 'u': /* unsigned decimal integer */
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base = 10;
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goto number;
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case 'd': /* signed decimal integer */
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base = 10;
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goto number;
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case 'i': /* generic integer */
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base = 0;
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number:
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{
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/* read an integer */
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ULONGLONG cur = 0;
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BOOLEAN negative = FALSE;
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BOOLEAN seendigit = FALSE;
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/* skip initial whitespace */
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while ((nch != '\0') && isspace( nch ))
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nch = (consumed++, *str++);
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/* get sign */
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if (nch == '-' || nch == '+')
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{
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negative = (nch == '-');
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nch = (consumed++, *str++);
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if (width > 0) width--;
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}
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/* look for leading indication of base */
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if (width != 0 && nch == '0' && *format != 'p' && *format != 'P')
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{
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nch = (consumed++, *str++);
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if (width > 0) width--;
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seendigit = TRUE;
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if (width != 0 && (nch == 'x' || nch == 'X'))
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{
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if (base == 0)
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base = 16;
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if (base == 16)
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{
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nch = (consumed++, *str++);
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if (width > 0) width--;
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seendigit = FALSE;
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}
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} else if (base == 0)
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base = 8;
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}
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/* format %i without indication of base */
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if (base == 0)
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base = 10;
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/* throw away leading zeros */
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while (width != 0 && nch == '0')
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{
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nch = (consumed++, *str++);
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if (width > 0) width--;
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seendigit = TRUE;
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}
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if (width != 0 && char2digit( nch, base ) != -1)
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{
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cur = char2digit( nch, base );
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nch = (consumed++, *str++);
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if (width > 0) width--;
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seendigit = TRUE;
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}
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/* read until no more digits */
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while (width != 0 && nch != '\0' && char2digit( nch, base ) != -1)
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{
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cur = cur*base + char2digit( nch, base );
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nch = (consumed++, *str++);
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if (width > 0) width--;
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seendigit = TRUE;
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}
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/* okay, done! */
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if (!seendigit) break; /* not a valid number */
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st = 1;
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if (!suppress)
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{
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#define _SET_NUMBER_( type ) *va_arg( ap, type* ) = negative ? -cur : cur
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if (I64_prefix) _SET_NUMBER_( LONGLONG );
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else if (l_prefix) _SET_NUMBER_( LONG );
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else if (h_prefix == 1) _SET_NUMBER_( short int );
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else _SET_NUMBER_( int );
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}
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}
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break;
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case 'e':
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case 'E':
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case 'f':
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case 'g':
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case 'G':
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{ /* read a float */
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long double cur = 1, expcnt = 10;
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ULONGLONG d, hlp;
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int exp = 0;
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BOOLEAN negative = FALSE;
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/*unsigned fpcontrol;*/
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BOOLEAN negexp;
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/* skip initial whitespace */
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while (nch != '\0' && isspace( nch ))
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nch = (consumed++, *str++);
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/* get sign */
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if (nch == '-' || nch == '+')
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{
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negative = (nch == '-');
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if (width > 0) width--;
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if (width == 0) break;
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nch = (consumed++, *str++);
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}
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/* get first digit */
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if ('.' != nch)
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{
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if (!isdigit( nch )) break;
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d = nch - '0';
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nch = (consumed++, *str++);
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if (width > 0) width--;
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/* read until no more digits */
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while (width != 0 && nch != '\0' && isdigit( nch ))
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{
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hlp = d * 10 + nch - '0';
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nch = (consumed++, *str++);
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if (width > 0) width--;
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if(d > (ULONGLONG)-1/10 || hlp < d)
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{
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exp++;
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break;
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}
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else
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d = hlp;
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}
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while (width != 0 && nch != '\0' && isdigit( nch ))
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{
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exp++;
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nch = (consumed++, *str++);
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if (width > 0) width--;
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}
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}
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else
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d = 0; /* Fix: .8 -> 0.8 */
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/* handle decimals */
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if (width != 0 && nch == '.')
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{
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nch = (consumed++, *str++);
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if (width > 0) width--;
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while (width != 0 && nch != '\0' && isdigit( nch ))
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{
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hlp = d * 10 + nch - '0';
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nch = (consumed++, *str++);
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if (width > 0) width--;
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if(d > (ULONGLONG)-1/10 || hlp < d)
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break;
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d = hlp;
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exp--;
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}
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while (width != 0 && nch != '\0' && isdigit( nch ))
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{
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nch = (consumed++, *str++);
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if (width > 0) width--;
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}
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}
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/* handle exponent */
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if (width != 0 && (nch == 'e' || nch == 'E'))
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{
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int sign = 1, e = 0;
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nch = (consumed++, *str++);
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if (width > 0) width--;
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if (width != 0 && (nch == '+' || nch == '-'))
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{
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if(nch == '-')
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sign = -1;
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nch = (consumed++, *str++);
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if (width > 0) width--;
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}
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/* exponent digits */
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while (width != 0 && nch != '\0' && isdigit( nch ))
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{
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if (e > INT_MAX/10 || (e = e * 10 + nch - '0') < 0)
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e = INT_MAX;
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nch = (consumed++, *str++);
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if (width > 0) width--;
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}
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e *= sign;
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if(exp < 0 && e < 0 && e+exp > 0) exp = INT_MIN;
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else if(exp > 0 && e > 0 && e+exp < 0) exp = INT_MAX;
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else exp += e;
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}
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/*fpcontrol = _control87(0, 0);
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_control87(MSVCRT__EM_DENORMAL|MSVCRT__EM_INVALID|MSVCRT__EM_ZERODIVIDE
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|MSVCRT__EM_OVERFLOW|MSVCRT__EM_UNDERFLOW|MSVCRT__EM_INEXACT, 0xffffffff);*/
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negexp = (exp < 0);
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if (negexp)
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exp = -exp;
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/* update 'cur' with this exponent. */
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while (exp)
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{
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if(exp & 1)
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cur *= expcnt;
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exp /= 2;
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expcnt = expcnt*expcnt;
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}
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cur = (negexp ? d/cur : d*cur);
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/*_control87(fpcontrol, 0xffffffff);*/
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st = 1;
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if (!suppress)
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{
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if (L_prefix || l_prefix) _SET_NUMBER_( double );
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else _SET_NUMBER_( float );
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}
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}
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break;
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/* According to msdn,
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* 's' reads a character string in a call to fscanf
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* and 'S' a wide character string and vice versa in a
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* call to fwscanf. The 'h', 'w' and 'l' prefixes override
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* this behaviour. 'h' forces reading char * but 'l' and 'w'
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* force reading WCHAR. */
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case 's':
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if (w_prefix || l_prefix) goto widecharstring;
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else if (h_prefix) goto charstring;
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else goto charstring;
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case 'S':
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if (w_prefix || l_prefix) goto widecharstring;
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else if (h_prefix) goto charstring;
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else goto widecharstring;
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charstring:
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{ /* read a word into a char */
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char *sptr = suppress ? NULL : va_arg( ap, char * );
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char *sptr_beg = sptr;
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unsigned size = UINT_MAX;
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/* skip initial whitespace */
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while (nch != '\0' && isspace( nch ))
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nch = (consumed++, *str++);
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/* read until whitespace */
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while (width != 0 && nch != '\0' && !isspace( nch ))
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{
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if (!suppress)
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{
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*sptr++ = nch;
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if(size > 1) size--;
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else
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{
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*sptr_beg = 0;
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return rd;
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}
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}
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st++;
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nch = (consumed++, *str++);
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if (width > 0) width--;
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}
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/* terminate */
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if (st && !suppress) *sptr = 0;
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}
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break;
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widecharstring:
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{ /* read a word into a WCHAR * */
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WCHAR *sptr = suppress ? NULL : va_arg( ap, WCHAR * );
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WCHAR *sptr_beg = sptr;
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unsigned size = UINT_MAX;
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/* skip initial whitespace */
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while (nch != '\0' && isspace( nch ))
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nch = (consumed++, *str++);
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/* read until whitespace */
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while (width != 0 && nch != '\0' && !isspace( nch ))
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{
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if (!suppress)
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{
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*sptr++ = nch;
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if (size > 1) size--;
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else
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{
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*sptr_beg = 0;
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return rd;
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}
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}
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st++;
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nch = (consumed++, *str++);
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if (width > 0) width--;
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}
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/* terminate */
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if (st && !suppress) *sptr = 0;
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}
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break;
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/* 'c' and 'C work analogously to 's' and 'S' as described
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* above */
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case 'c':
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if (w_prefix || l_prefix) goto widecharacter;
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else if (h_prefix) goto character;
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else goto character;
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case 'C':
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if (w_prefix || l_prefix) goto widecharacter;
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else if (h_prefix) goto character;
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else goto widecharacter;
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character:
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{ /* read single character into char */
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char *str = suppress ? NULL : va_arg( ap, char * );
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char *pstr = str;
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unsigned size = UINT_MAX;
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if (width == -1) width = 1;
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while (width && nch != '\0')
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{
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if (!suppress)
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{
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*str++ = nch;
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if(size) size--;
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else
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{
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*pstr = 0;
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return rd;
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}
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}
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st++;
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width--;
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nch = (consumed++, *str++);
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}
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}
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break;
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widecharacter:
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{ /* read single character into a WCHAR */
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WCHAR *str = suppress ? NULL : va_arg( ap, WCHAR * );
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WCHAR *pstr = str;
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unsigned size = UINT_MAX;
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if (width == -1) width = 1;
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while (width && nch != '\0')
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{
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if (!suppress)
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{
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*str++ = nch;
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if (size) size--;
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else
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{
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*pstr = 0;
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return rd;
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}
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}
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st++;
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width--;
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nch = (consumed++, *str++);
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}
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}
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break;
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case 'n':
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{
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if (!suppress)
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{
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int *n = va_arg( ap, int * );
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*n = consumed - 1;
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}
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/* This is an odd one: according to the standard,
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* "Execution of a %n directive does not increment the
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* assignment count returned at the completion of
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* execution" even if it wasn't suppressed with the
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* '*' flag. The Corrigendum to the standard seems
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* to contradict this (comment out the assignment to
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* suppress below if you want to implement these
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* alternate semantics) but the windows program I'm
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* looking at expects the behavior I've coded here
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* (which happens to be what glibc does as well).
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*/
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suppress = TRUE;
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st = 1;
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}
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break;
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case '[':
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{
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char *str = suppress ? NULL : va_arg( ap, char * );
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char *sptr = str;
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RTL_BITMAP bitMask;
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ULONG Mask[8];
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BOOLEAN invert = FALSE; /* Set if we are NOT to find the chars */
|
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unsigned size = UINT_MAX;
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RtlInitializeBitMap( &bitMask, Mask, sizeof(Mask) * 8 );
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|
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/* Read the format */
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format++;
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if (*format == '^')
|
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{
|
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invert = TRUE;
|
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format++;
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}
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if (*format == ']')
|
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{
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RtlSetBits( &bitMask, ']', 1 );
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format++;
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}
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while (*format && (*format != ']'))
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{
|
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/* According to msdn:
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* "Note that %[a-z] and %[z-a] are interpreted as equivalent to %[abcde...z]." */
|
||||
if ((*format == '-') && (*(format + 1) != ']'))
|
||||
{
|
||||
if ((*(format - 1)) < *(format + 1))
|
||||
RtlSetBits( &bitMask, *(format - 1) +1 , *(format + 1) - *(format - 1) );
|
||||
else
|
||||
RtlSetBits( &bitMask, *(format + 1) , *(format - 1) - *(format + 1) );
|
||||
format++;
|
||||
}
|
||||
else
|
||||
RtlSetBits( &bitMask, *format, 1 );
|
||||
format++;
|
||||
}
|
||||
/* read until char is not suitable */
|
||||
while (width != 0 && nch != '\0')
|
||||
{
|
||||
if (!invert)
|
||||
{
|
||||
if(RtlAreBitsSet( &bitMask, nch, 1 ))
|
||||
{
|
||||
if (!suppress) *sptr++ = nch;
|
||||
}
|
||||
else
|
||||
break;
|
||||
}
|
||||
else
|
||||
{
|
||||
if (RtlAreBitsClear( &bitMask, nch, 1 ))
|
||||
{
|
||||
if (!suppress) *sptr++ = nch;
|
||||
}
|
||||
else
|
||||
break;
|
||||
}
|
||||
st++;
|
||||
nch = (consumed++, *str++);
|
||||
if (width > 0) width--;
|
||||
if(size > 1) size--;
|
||||
else
|
||||
{
|
||||
*str = 0;
|
||||
return rd;
|
||||
}
|
||||
}
|
||||
/* terminate */
|
||||
if (!suppress) *sptr = 0;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
/* From spec: "if a percent sign is followed by a character
|
||||
* that has no meaning as a format-control character, that
|
||||
* character and the following characters are treated as
|
||||
* an ordinary sequence of characters, that is, a sequence
|
||||
* of characters that must match the input. For example,
|
||||
* to specify that a percent-sign character is to be input,
|
||||
* use %%." */
|
||||
while (nch != '\0' && isspace( nch ))
|
||||
nch = (consumed++, *str++);
|
||||
if (nch == *format)
|
||||
{
|
||||
suppress = TRUE; /* whoops no field to be read */
|
||||
st = 1; /* but we got what we expected */
|
||||
nch = (consumed++, *str++);
|
||||
}
|
||||
break;
|
||||
}
|
||||
if (st && !suppress) rd++;
|
||||
else if (!st) break;
|
||||
}
|
||||
/* A non-white-space character causes scanf to read, but not store,
|
||||
* a matching non-white-space character. */
|
||||
else
|
||||
{
|
||||
if (nch == *format)
|
||||
nch = (consumed++, *str++);
|
||||
else break;
|
||||
}
|
||||
format++;
|
||||
}
|
||||
if (nch != '\0')
|
||||
{
|
||||
consumed--, str--;
|
||||
}
|
||||
|
||||
return rd;
|
||||
}
|
||||
|
||||
|
||||
/*********************************************************************
|
||||
* sscanf (NTDLL.@)
|
||||
*/
|
||||
int __cdecl NTDLL_sscanf( const char *str, const char *format, ... )
|
||||
{
|
||||
int ret;
|
||||
va_list valist;
|
||||
va_start( valist, format );
|
||||
ret = vsscanf( str, format, valist );
|
||||
va_end( valist );
|
||||
__ms_va_list valist;
|
||||
__ms_va_start( valist, format );
|
||||
ret = NTDLL_vsscanf( str, format, valist );
|
||||
__ms_va_end( valist );
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user