Combined the implementation of all the scanf's in a single place.
Added implementations of fwscanf, swscanf, wscanf and sscanf. Corrected the declaration of swscanf. Added implementation of the l, h, L and w prefixes. Added implementation of the c, C, s, S and n types.
This commit is contained in:
Daniel Gudbjartsson
Alexandre Julliard
parent
9fc17ee371
commit
42c74d6454
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@ -31,6 +31,7 @@ C_SRCS = \
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mbcs.c \
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misc.c \
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process.c \
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scanf.c \
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string.c \
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thread.c \
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time.c \
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@ -193,266 +193,6 @@ int _ungetch(int c)
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return retval;
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}
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/* helper function for _cscanf. 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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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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/*********************************************************************
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* _cscanf (MSVCRT.@)
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*/
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int _cscanf(const char* format, ...)
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{
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/* NOTE: If you extend this function, extend MSVCRT_fscanf in file.c too */
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int rd = 0;
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int nch;
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va_list ap;
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if (!*format) return 0;
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WARN("\"%s\": semi-stub\n", format);
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va_start(ap, format);
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LOCK_CONSOLE;
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nch = _getch();
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while (*format) {
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/* a whitespace character in the format string causes scanf to read,
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* but not store, all consecutive white-space characters in the input
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* up to the next non-white-space character. One white space character
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* in the input matches any number (including zero) and combination of
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* white-space characters in the input. */
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if (isspace(*format)) {
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/* skip whitespace */
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while ((nch!=MSVCRT_EOF) && isspace(nch))
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nch = _getch();
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}
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/* a format specification causes scanf to read and convert characters
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* in the input into values of a specified type. The value is assigned
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* to an argument in the argument list. Format specifications have
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* the form %[*][width][{h | l | I64 | L}]type */
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/* FIXME: unimplemented: h/l/I64/L modifiers and some type specs. */
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else if (*format == '%') {
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int st = 0; int suppress = 0; int width = 0;
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int base, number_signed;
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format++;
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/* look for leading asterisk, which means 'suppress assignment of
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* this field'. */
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if (*format=='*') {
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format++;
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suppress=1;
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}
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/* look for width specification */
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while (isdigit(*format)) {
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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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switch(*format) {
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case '%': /* read a percent symbol */
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if (nch!='%') break;
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nch = _getch();
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break;
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case 'x':
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case 'X': /* hexadecimal integer. */
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base = 16; number_signed = 0;
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goto number;
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case 'o': /* octal integer */
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base = 8; number_signed = 0;
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goto number;
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case 'u': /* unsigned decimal integer */
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base = 10; number_signed = 0;
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goto number;
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case 'd': /* signed decimal integer */
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base = 10; number_signed = 1;
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goto number;
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case 'i': /* generic integer */
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base = 0; number_signed = 1;
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number: {
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/* read an integer */
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int*val = suppress ? NULL : va_arg(ap, int*);
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int cur = 0; int negative = 0; int seendigit=0;
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/* skip initial whitespace */
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while ((nch!=MSVCRT_EOF) && isspace(nch))
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nch = _getch();
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/* get sign */
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if (number_signed && (nch == '-' || nch == '+')) {
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negative = (nch=='-');
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nch = _getch();
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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') {
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nch = _getch();
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if (width>0) width--;
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seendigit=1;
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if (width!=0 && (nch=='x' || nch=='X')) {
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if (base==0)
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base=16;
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if (base==16) {
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nch = _getch();
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if (width>0) width--;
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seendigit=0;
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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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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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nch = _getch();
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if (width>0) width--;
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seendigit=1;
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}
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/* get first digit. Keep working copy negative, as the
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* range of negative numbers in two's complement notation
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* is one larger than the range of positive numbers. */
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if (width!=0 && char2digit(nch, base)!=-1) {
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cur = -char2digit(nch, base);
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nch = _getch();
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if (width>0) width--;
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seendigit=1;
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}
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/* read until no more digits */
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while (width!=0 && (nch!=MSVCRT_EOF) && isdigit(nch)) {
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cur = cur*base + char2digit(nch, base);
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nch = _getch();
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if (width>0) width--;
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seendigit=1;
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}
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/* negate parsed number if non-negative */
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if (!negative) cur=-cur;
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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) *val = cur;
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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': { /* read a float */
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float*val = suppress ? NULL : va_arg(ap, float*);
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float cur = 0;
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int negative = 0;
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/* skip initial whitespace */
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while ((nch!=MSVCRT_EOF) && isspace(nch))
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nch = _getch();
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/* get sign. */
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if (nch == '-' || nch == '+') {
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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 = _getch();
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}
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/* get first digit. */
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if (!isdigit(nch)) break;
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cur = (nch - '0') * (negative ? -1 : 1);
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nch = _getch();
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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!=MSVCRT_EOF) && isdigit(nch)) {
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cur = cur*10 + (nch - '0');
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nch = _getch();
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if (width>0) width--;
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}
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/* handle decimals */
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if (width!=0 && nch == '.') {
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float dec = 1;
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nch = _getch();
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if (width>0) width--;
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while (width!=0 && (nch!=MSVCRT_EOF) && isdigit(nch)) {
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dec /= 10;
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cur += dec * (nch - '0');
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nch = _getch();
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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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int exponent = 0, negexp = 0;
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float expcnt;
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nch = _getch();
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if (width>0) width--;
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/* possible sign on the exponent */
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if (width!=0 && (nch=='+' || nch=='-')) {
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negexp = (nch=='-');
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nch = _getch();
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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!=MSVCRT_EOF) && isdigit(nch)) {
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exponent *= 10;
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exponent += (nch - '0');
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nch = _getch();
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if (width>0) width--;
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}
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/* update 'cur' with this exponent. */
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expcnt = negexp ? .1 : 10;
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while (exponent!=0) {
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if (exponent&1)
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cur*=expcnt;
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exponent/=2;
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expcnt=expcnt*expcnt;
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}
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}
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st = 1;
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if (!suppress) *val = cur;
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}
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break;
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case 's': { /* read a word */
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char*str = suppress ? NULL : va_arg(ap, char*);
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char*sptr = str;
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/* skip initial whitespace */
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while ((nch!=MSVCRT_EOF) && isspace(nch))
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nch = _getch();
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/* read until whitespace */
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while (width!=0 && (nch!=MSVCRT_EOF) && !isspace(nch)) {
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if (!suppress) *sptr++ = nch;
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st++;
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nch = _getch();
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if (width>0) width--;
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}
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/* terminate */
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if (!suppress) *sptr = 0;
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TRACE("read word: %s\n", str);
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}
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break;
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default: FIXME("unhandled: %%%c\n", *format);
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/* From spec: "if a percent sign is followed by a character
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* that has no meaning as a format-control character, that
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* character and the following characters are treated as
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* an ordinary sequence of characters, that is, a sequence
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* of characters that must match the input. For example,
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* to specify that a percent-sign character is to be input,
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* use %%."
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* LEAVING AS-IS because we catch bugs better that way. */
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}
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if (st && !suppress) rd++;
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else break;
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}
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/* a non-white-space character causes scanf to read, but not store,
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* a matching non-white-space character. */
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else {
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/* check for character match */
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if (nch == *format)
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nch = _getch();
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else break;
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}
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format++;
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}
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if (nch != MSVCRT_EOF)
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_ungetch(nch);
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UNLOCK_CONSOLE;
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va_end(ap);
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TRACE("returning %d\n", rd);
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return rd;
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}
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/*********************************************************************
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* _kbhit (MSVCRT.@)
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*/
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@ -1862,269 +1862,6 @@ int MSVCRT_fsetpos(MSVCRT_FILE* file, MSVCRT_fpos_t *pos)
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return _lseek(file->_file,*pos,SEEK_SET);
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}
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/* helper function for fscanf. 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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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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/*********************************************************************
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* fscanf (MSVCRT.@)
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* Implemented based on
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* http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vccore98/html/_crt_format_specification_fields_.2d_.scanf_and_wscanf_functions.asp
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* Extended by C. Scott Ananian <cananian@alumni.princeton.edu> to handle
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* more types of format spec.
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*/
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int MSVCRT_fscanf(MSVCRT_FILE* file, const char *format, ...)
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{
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/* NOTE: If you extend this function, extend MSVCRT__cscanf in console.c too */
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int rd = 0;
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int nch;
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va_list ap;
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if (!*format) return 0;
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WARN("%p (\"%s\"): semi-stub\n", file, format);
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nch = MSVCRT_fgetc(file);
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va_start(ap, format);
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while (*format) {
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/* a whitespace character in the format string causes scanf to read,
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* but not store, all consecutive white-space characters in the input
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* up to the next non-white-space character. One white space character
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* in the input matches any number (including zero) and combination of
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* white-space characters in the input. */
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if (isspace(*format)) {
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/* skip whitespace */
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while ((nch!=MSVCRT_EOF) && isspace(nch))
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nch = MSVCRT_fgetc(file);
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}
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/* a format specification causes scanf to read and convert characters
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* in the input into values of a specified type. The value is assigned
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* to an argument in the argument list. Format specifications have
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* the form %[*][width][{h | l | I64 | L}]type */
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/* FIXME: unimplemented: h/l/I64/L modifiers and some type specs. */
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else if (*format == '%') {
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int st = 0; int suppress = 0; int width = 0;
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int base, number_signed;
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format++;
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/* look for leading asterisk, which means 'suppress assignment of
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* this field'. */
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if (*format=='*') {
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format++;
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suppress=1;
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}
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/* look for width specification */
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while (isdigit(*format)) {
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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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switch(*format) {
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case '%': /* read a percent symbol */
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if (nch!='%') break;
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nch = MSVCRT_fgetc(file);
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break;
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case 'x':
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case 'X': /* hexadecimal integer. */
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base = 16; number_signed = 0;
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goto number;
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case 'o': /* octal integer */
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base = 8; number_signed = 0;
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goto number;
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case 'u': /* unsigned decimal integer */
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base = 10; number_signed = 0;
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goto number;
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case 'd': /* signed decimal integer */
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base = 10; number_signed = 1;
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goto number;
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case 'i': /* generic integer */
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base = 0; number_signed = 1;
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number: {
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/* read an integer */
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int*val = suppress ? NULL : va_arg(ap, int*);
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int cur = 0; int negative = 0; int seendigit=0;
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/* skip initial whitespace */
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while ((nch!=MSVCRT_EOF) && isspace(nch))
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nch = MSVCRT_fgetc(file);
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/* get sign */
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if (number_signed && (nch == '-' || nch == '+')) {
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negative = (nch=='-');
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nch = MSVCRT_fgetc(file);
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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') {
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nch = MSVCRT_fgetc(file);
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if (width>0) width--;
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seendigit=1;
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if (width!=0 && (nch=='x' || nch=='X')) {
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if (base==0)
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base=16;
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if (base==16) {
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nch = MSVCRT_fgetc(file);
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if (width>0) width--;
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seendigit=0;
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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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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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nch = MSVCRT_fgetc(file);
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if (width>0) width--;
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seendigit=1;
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}
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/* get first digit. Keep working copy negative, as the
|
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* range of negative numbers in two's complement notation
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* is one larger than the range of positive numbers. */
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if (width!=0 && char2digit(nch, base)!=-1) {
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cur = -char2digit(nch, base);
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nch = MSVCRT_fgetc(file);
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if (width>0) width--;
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seendigit=1;
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}
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/* read until no more digits */
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while (width!=0 && (nch!=MSVCRT_EOF) && isdigit(nch)) {
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cur = cur*base + char2digit(nch, base);
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nch = MSVCRT_fgetc(file);
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if (width>0) width--;
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seendigit=1;
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}
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/* negate parsed number if non-negative */
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if (!negative) cur=-cur;
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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) *val = cur;
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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': { /* read a float */
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float*val = suppress ? NULL : va_arg(ap, float*);
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float cur = 0;
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int negative = 0;
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/* skip initial whitespace */
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while ((nch!=MSVCRT_EOF) && isspace(nch))
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nch = MSVCRT_fgetc(file);
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/* get sign. */
|
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if (nch == '-' || nch == '+') {
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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 = MSVCRT_fgetc(file);
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}
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/* get first digit. */
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if (!isdigit(nch)) break;
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cur = (nch - '0') * (negative ? -1 : 1);
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nch = MSVCRT_fgetc(file);
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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!=MSVCRT_EOF) && isdigit(nch)) {
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cur = cur*10 + (nch - '0');
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nch = MSVCRT_fgetc(file);
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if (width>0) width--;
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}
|
||||
/* handle decimals */
|
||||
if (width!=0 && nch == '.') {
|
||||
float dec = 1;
|
||||
nch = MSVCRT_fgetc(file);
|
||||
if (width>0) width--;
|
||||
while (width!=0 && (nch!=MSVCRT_EOF) && isdigit(nch)) {
|
||||
dec /= 10;
|
||||
cur += dec * (nch - '0');
|
||||
nch = MSVCRT_fgetc(file);
|
||||
if (width>0) width--;
|
||||
}
|
||||
}
|
||||
/* handle exponent */
|
||||
if (width!=0 && (nch == 'e' || nch == 'E')) {
|
||||
int exponent = 0, negexp = 0;
|
||||
float expcnt;
|
||||
nch = MSVCRT_fgetc(file);
|
||||
if (width>0) width--;
|
||||
/* possible sign on the exponent */
|
||||
if (width!=0 && (nch=='+' || nch=='-')) {
|
||||
negexp = (nch=='-');
|
||||
nch = MSVCRT_fgetc(file);
|
||||
if (width>0) width--;
|
||||
}
|
||||
/* exponent digits */
|
||||
while (width!=0 && (nch!=MSVCRT_EOF) && isdigit(nch)) {
|
||||
exponent *= 10;
|
||||
exponent += (nch - '0');
|
||||
nch = MSVCRT_fgetc(file);
|
||||
if (width>0) width--;
|
||||
}
|
||||
/* update 'cur' with this exponent. */
|
||||
expcnt = negexp ? .1 : 10;
|
||||
while (exponent!=0) {
|
||||
if (exponent&1)
|
||||
cur*=expcnt;
|
||||
exponent/=2;
|
||||
expcnt=expcnt*expcnt;
|
||||
}
|
||||
}
|
||||
st = 1;
|
||||
if (!suppress) *val = cur;
|
||||
}
|
||||
break;
|
||||
case 's': { /* read a word */
|
||||
char*str = suppress ? NULL : va_arg(ap, char*);
|
||||
char*sptr = str;
|
||||
/* skip initial whitespace */
|
||||
while ((nch!=MSVCRT_EOF) && isspace(nch))
|
||||
nch = MSVCRT_fgetc(file);
|
||||
/* read until whitespace */
|
||||
while (width!=0 && (nch!=MSVCRT_EOF) && !isspace(nch)) {
|
||||
if (!suppress) *sptr++ = nch;
|
||||
st++;
|
||||
nch = MSVCRT_fgetc(file);
|
||||
if (width>0) width--;
|
||||
}
|
||||
/* terminate */
|
||||
if (!suppress) *sptr = 0;
|
||||
TRACE("read word: %s\n", str);
|
||||
}
|
||||
break;
|
||||
default: FIXME("unhandled: %%%c\n", *format);
|
||||
/* 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 %%."
|
||||
* LEAVING AS-IS because we catch bugs better that way. */
|
||||
}
|
||||
if (st && !suppress) rd++;
|
||||
else break;
|
||||
}
|
||||
/* a non-white-space character causes scanf to read, but not store,
|
||||
* a matching non-white-space character. */
|
||||
else {
|
||||
/* check for character match */
|
||||
if (nch == *format)
|
||||
nch = MSVCRT_fgetc(file);
|
||||
else break;
|
||||
}
|
||||
format++;
|
||||
}
|
||||
if (nch!=MSVCRT_EOF) {
|
||||
FIXME("need ungetch\n");
|
||||
}
|
||||
va_end(ap);
|
||||
TRACE("returning %d\n", rd);
|
||||
return rd;
|
||||
}
|
||||
|
||||
/*********************************************************************
|
||||
* fseek (MSVCRT.@)
|
||||
*/
|
||||
|
|
@ -2350,6 +2087,20 @@ int MSVCRT_scanf(const char *format, ...)
|
|||
return res;
|
||||
}
|
||||
|
||||
/*********************************************************************
|
||||
* wscanf (MSVCRT.@)
|
||||
*/
|
||||
int MSVCRT_wscanf(const WCHAR *format, ...)
|
||||
{
|
||||
va_list valist;
|
||||
int res;
|
||||
|
||||
va_start(valist, format);
|
||||
res = MSVCRT_fwscanf(MSVCRT_stdin, format, valist);
|
||||
va_end(valist);
|
||||
return res;
|
||||
}
|
||||
|
||||
/*********************************************************************
|
||||
* rename (MSVCRT.@)
|
||||
*/
|
||||
|
|
|
|||
|
|
@ -619,7 +619,7 @@ init MSVCRT_Init
|
|||
@ cdecl ftell(ptr) MSVCRT_ftell
|
||||
@ varargs fwprintf(ptr wstr) MSVCRT_fwprintf
|
||||
@ cdecl fwrite(ptr long long ptr) MSVCRT_fwrite
|
||||
@ stub fwscanf #(ptr wstr) varargs
|
||||
@ varargs fwscanf(ptr wstr) MSVCRT_fwscanf
|
||||
@ cdecl getc(ptr) MSVCRT_getc
|
||||
@ cdecl getchar() MSVCRT_getchar
|
||||
@ cdecl getenv(str) MSVCRT_getenv
|
||||
|
|
@ -697,7 +697,7 @@ init MSVCRT_Init
|
|||
@ varargs sprintf(ptr str) sprintf
|
||||
@ forward -noimport sqrt ntdll.sqrt
|
||||
@ cdecl srand(long) srand
|
||||
@ varargs sscanf(str str) sscanf
|
||||
@ varargs sscanf(str str) MSVCRT_sscanf
|
||||
@ cdecl strcat(str str) strcat
|
||||
@ cdecl strchr(str long) strchr
|
||||
@ cdecl strcmp(str str) strcmp
|
||||
|
|
@ -762,6 +762,6 @@ init MSVCRT_Init
|
|||
@ stub wcsxfrm #(wstr wstr long)
|
||||
@ cdecl wctomb(ptr long) MSVCRT_wctomb
|
||||
@ varargs wprintf(wstr) MSVCRT_wprintf
|
||||
@ stub wscanf #(wstr) varargs
|
||||
@ varargs wscanf(wstr) MSVCRT_wscanf
|
||||
@ stub _Gettnames
|
||||
@ stub __lc_collate_cp
|
||||
|
|
|
|||
|
|
@ -0,0 +1,95 @@
|
|||
/*
|
||||
* general implementation of scanf used by scanf, sscanf, fscanf,
|
||||
* _cscanf, wscanf, swscanf and fwscanf
|
||||
*
|
||||
* Copyright 1996,1998 Marcus Meissner
|
||||
* Copyright 1996 Jukka Iivonen
|
||||
* Copyright 1997,2000 Uwe Bonnes
|
||||
* Copyright 2000 Jon Griffiths
|
||||
* Copyright 2002 Daniel Gudbjartsson
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2.1 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this library; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
*/
|
||||
|
||||
#include "winbase.h"
|
||||
#include "msvcrt.h"
|
||||
#include "msvcrt/conio.h"
|
||||
#include "msvcrt/io.h"
|
||||
#include "wine/debug.h"
|
||||
|
||||
WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
|
||||
|
||||
/* helper function for *scanf. Returns the value of character c in the
|
||||
* given base, or -1 if the given character is not a digit of the base.
|
||||
*/
|
||||
static int char2digit(char c, int base) {
|
||||
if ((c>='0') && (c<='9') && (c<='0'+base-1)) return (c-'0');
|
||||
if (base<=10) return -1;
|
||||
if ((c>='A') && (c<='Z') && (c<='A'+base-11)) return (c-'A'+10);
|
||||
if ((c>='a') && (c<='z') && (c<='a'+base-11)) return (c-'a'+10);
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* helper function for *wscanf. Returns the value of character c in the
|
||||
* given base, or -1 if the given character is not a digit of the base.
|
||||
*/
|
||||
static int wchar2digit(WCHAR c, int base) {
|
||||
if ((c>=L'0') && (c<=L'9') && (c<=L'0'+base-1)) return (c-L'0');
|
||||
if (base<=10) return -1;
|
||||
if ((c>=L'A') && (c<=L'Z') && (c<=L'A'+base-11)) return (c-L'A'+10);
|
||||
if ((c>=L'a') && (c<=L'z') && (c<=L'a'+base-11)) return (c-L'a'+10);
|
||||
return -1;
|
||||
}
|
||||
|
||||
|
||||
/*********************************************************************
|
||||
* fscanf (MSVCRT.@)
|
||||
*/
|
||||
#undef WIDE_SCANF
|
||||
#undef CONSOLE
|
||||
#undef STRING
|
||||
#include "scanf.h"
|
||||
|
||||
/*********************************************************************
|
||||
* fwscanf (MSVCRT.@)
|
||||
*/
|
||||
#define WIDE_SCANF 1
|
||||
#undef CONSOLE
|
||||
#undef STRING
|
||||
#include "scanf.h"
|
||||
|
||||
/*********************************************************************
|
||||
* sscanf (MSVCRT.@)
|
||||
*/
|
||||
#undef WIDE_SCANF
|
||||
#undef CONSOLE
|
||||
#define STRING 1
|
||||
#include "scanf.h"
|
||||
|
||||
/*********************************************************************
|
||||
* swscanf (MSVCRT.@)
|
||||
*/
|
||||
#define WIDE_SCANF 1
|
||||
#undef CONSOLE
|
||||
#define STRING 1
|
||||
#include "scanf.h"
|
||||
|
||||
/*********************************************************************
|
||||
* _cscanf (MSVCRT.@)
|
||||
*/
|
||||
#undef WIDE_SCANF
|
||||
#define CONSOLE 1
|
||||
#undef STRING
|
||||
#include "scanf.h"
|
||||
|
|
@ -0,0 +1,483 @@
|
|||
/*
|
||||
* general implementation of scanf used by scanf, sscanf, fscanf,
|
||||
* _cscanf, wscanf, swscanf and fwscanf
|
||||
*
|
||||
* Copyright 1996,1998 Marcus Meissner
|
||||
* Copyright 1996 Jukka Iivonen
|
||||
* Copyright 1997,2000 Uwe Bonnes
|
||||
* Copyright 2000 Jon Griffiths
|
||||
* Copyright 2002 Daniel Gudbjartsson
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2.1 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this library; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
*/
|
||||
|
||||
#ifdef WIDE_SCANF
|
||||
#define _L_(x) L##x
|
||||
#define _CHAR_ WCHAR
|
||||
#define _EOF_ MSVCRT_WEOF
|
||||
#define _ISSPACE_(c) MSVCRT_iswspace(c)
|
||||
#define _ISDIGIT_(c) MSVCRT_iswdigit(c)
|
||||
#define _CONVERT_(c) c /*** FIXME ***/
|
||||
#define _CHAR2DIGIT_(c, base) wchar2digit((c), (base))
|
||||
#else /* WIDE_SCANF */
|
||||
#define _L_(x) x
|
||||
#define _CHAR_ char
|
||||
#define _EOF_ MSVCRT_EOF
|
||||
#define _ISSPACE_(c) isspace(c)
|
||||
#define _ISDIGIT_(c) isdigit(c)
|
||||
#define _CONVERT_(c) c /*** FIXME ***/
|
||||
#define _CHAR2DIGIT_(c, base) char2digit((c), (base))
|
||||
#endif /* WIDE_SCANF */
|
||||
|
||||
#ifdef CONSOLE
|
||||
#define _GETC_(file) _getch()
|
||||
#define _UNGETC_(nch, file) _ungetch(nch)
|
||||
#define _FUNCTION_ _cscanf(const _CHAR_ *format, ...)
|
||||
#else
|
||||
#ifdef STRING
|
||||
#define _GETC_(file) *file++
|
||||
#define _UNGETC_(nch, file) file--
|
||||
#ifdef WIDE_SCANF
|
||||
#define _FUNCTION_ MSVCRT_swscanf(const WCHAR *file, const WCHAR *format, ...)
|
||||
#else /* WIDE_SCANF */
|
||||
#define _FUNCTION_ MSVCRT_sscanf(const char *file, const char *format, ...)
|
||||
#endif /* WIDE_SCANF */
|
||||
#else /* STRING */
|
||||
#ifdef WIDE_SCANF
|
||||
#define _GETC_(file) MSVCRT_fgetwc(file)
|
||||
#define _UNGETC_(nch, file) MSVCRT_ungetwc(nch, file)
|
||||
#define _FUNCTION_ MSVCRT_fwscanf(MSVCRT_FILE* file, const WCHAR *format, ...)
|
||||
#else /* WIDE_SCANF */
|
||||
#define _GETC_(file) MSVCRT_fgetc(file)
|
||||
#define _UNGETC_(nch, file) MSVCRT_ungetc(nch, file)
|
||||
#define _FUNCTION_ MSVCRT_fscanf(MSVCRT_FILE* file, const char *format, ...)
|
||||
#endif /* WIDE_SCANF */
|
||||
#endif /* STRING */
|
||||
#endif /* CONSOLE */
|
||||
|
||||
/*********************************************************************
|
||||
* Implemented based on
|
||||
* http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vccore98/html/_crt_format_specification_fields_.2d_.scanf_and_wscanf_functions.asp
|
||||
* Extended by C. Scott Ananian <cananian@alumni.princeton.edu> to handle
|
||||
* more types of format spec.
|
||||
*/
|
||||
int _FUNCTION_ {
|
||||
int rd = 0;
|
||||
int nch;
|
||||
va_list ap;
|
||||
if (!*format) return 0;
|
||||
#ifndef WIDE_SCANF
|
||||
#ifdef CONSOLE
|
||||
WARN("(\"%s\"): semi-stub\n", format);
|
||||
#else /* CONSOLE */
|
||||
#ifdef STRING
|
||||
WARN("%s (\"%s\"): semi-stub\n", file, format);
|
||||
#else /* STRING */
|
||||
WARN("%p (\"%s\"): semi-stub\n", file, format);
|
||||
#endif /* STRING */
|
||||
#endif /* CONSOLE */
|
||||
#endif /* WIDE_SCANF */
|
||||
nch = _GETC_(file);
|
||||
va_start(ap, format);
|
||||
while (*format) {
|
||||
/* a whitespace character in the format string causes scanf to read,
|
||||
* but not store, all consecutive white-space characters in the input
|
||||
* up to the next non-white-space character. One white space character
|
||||
* in the input matches any number (including zero) and combination of
|
||||
* white-space characters in the input. */
|
||||
if (_ISSPACE_(*format)) {
|
||||
/* skip whitespace */
|
||||
while ((nch!=_EOF_) && _ISSPACE_(nch))
|
||||
nch = _GETC_(file);
|
||||
}
|
||||
/* a format specification causes scanf to read and convert characters
|
||||
* in the input into values of a specified type. The value is assigned
|
||||
* to an argument in the argument list. Format specifications have
|
||||
* the form %[*][width][{h | l | I64 | L}]type */
|
||||
else if (*format == _L_('%')) {
|
||||
int st = 0; int suppress = 0; int width = 0;
|
||||
int base, number_signed;
|
||||
int h_prefix = 0;
|
||||
int l_prefix = 0;
|
||||
int L_prefix = 0;
|
||||
int w_prefix = 0;
|
||||
int prefix_finished = 0;
|
||||
/* int I64_prefix = 0; */
|
||||
format++;
|
||||
/* look for leading asterisk, which means 'suppress assignment of
|
||||
* this field'. */
|
||||
if (*format==_L_('*')) {
|
||||
format++;
|
||||
suppress=1;
|
||||
}
|
||||
/* look for width specification */
|
||||
while (_ISDIGIT_(*format)) {
|
||||
width*=10;
|
||||
width+=*format++ - _L_('0');
|
||||
}
|
||||
if (width==0) width=-1; /* no width spec seen */
|
||||
/* read prefix (if any) */
|
||||
while (!prefix_finished) {
|
||||
switch(*format) {
|
||||
case _L_('h'): h_prefix = 1; break;
|
||||
case _L_('l'): l_prefix = 1; break;
|
||||
case _L_('w'): w_prefix = 1; break;
|
||||
case _L_('L'): L_prefix = 1; break;
|
||||
case _L_('I'):
|
||||
if (*(format + 1) == _L_('6') &&
|
||||
*(format + 2) == _L_('4')) {
|
||||
/* I64_prefix = 1; */
|
||||
format += 2;
|
||||
FIXME("I64 prefix currently not implemented in fscanf/fwscanf");
|
||||
}
|
||||
break;
|
||||
default:
|
||||
prefix_finished = 1;
|
||||
}
|
||||
if (!prefix_finished) format++;
|
||||
}
|
||||
/* read type */
|
||||
switch(*format) {
|
||||
case _L_('%'): { /* read a percent symbol */
|
||||
while ((nch!=_EOF_) && _ISSPACE_(nch))
|
||||
nch = _GETC_(file);
|
||||
if (nch==_L_('%')) {
|
||||
suppress = 1; /* whoops no field to be read */
|
||||
st = 1; /* but we got what we expected */
|
||||
nch = _GETC_(file);
|
||||
}
|
||||
}
|
||||
break;
|
||||
case _L_('x'):
|
||||
case _L_('X'): /* hexadecimal integer. */
|
||||
base = 16; number_signed = 0;
|
||||
goto number;
|
||||
case _L_('o'): /* octal integer */
|
||||
base = 8; number_signed = 0;
|
||||
goto number;
|
||||
case _L_('u'): /* unsigned decimal integer */
|
||||
base = 10; number_signed = 0;
|
||||
goto number;
|
||||
case _L_('d'): /* signed decimal integer */
|
||||
base = 10; number_signed = 1;
|
||||
goto number;
|
||||
case _L_('i'): /* generic integer */
|
||||
base = 0; number_signed = 1;
|
||||
number: {
|
||||
/* read an integer */
|
||||
long unsigned int cur = 0;
|
||||
int negative = 0;
|
||||
int seendigit=0;
|
||||
/* skip initial whitespace */
|
||||
while ((nch!=_EOF_) && _ISSPACE_(nch))
|
||||
nch = _GETC_(file);
|
||||
/* get sign */
|
||||
if (number_signed && (nch == _L_('-') ||
|
||||
nch == _L_('+'))) {
|
||||
negative = (nch==_L_('-'));
|
||||
nch = _GETC_(file);
|
||||
if (width>0) width--;
|
||||
}
|
||||
/* look for leading indication of base */
|
||||
if (width!=0 && nch == _L_('0')) {
|
||||
nch = _GETC_(file);
|
||||
if (width>0) width--;
|
||||
seendigit=1;
|
||||
if (width!=0 && (nch==_L_('x') || nch==_L_('X'))) {
|
||||
if (base==0)
|
||||
base=16;
|
||||
if (base==16) {
|
||||
nch = _GETC_(file);
|
||||
if (width>0) width--;
|
||||
seendigit=0;
|
||||
}
|
||||
} else if (base==0)
|
||||
base = 8;
|
||||
}
|
||||
/* throw away leading zeros */
|
||||
while (width!=0 && nch==_L_('0')) {
|
||||
nch = _GETC_(file);
|
||||
if (width>0) width--;
|
||||
seendigit=1;
|
||||
}
|
||||
if (width!=0 && _CHAR2DIGIT_(nch, base)!=-1) {
|
||||
cur = _CHAR2DIGIT_(nch, base);
|
||||
nch = _GETC_(file);
|
||||
if (width>0) width--;
|
||||
seendigit=1;
|
||||
}
|
||||
/* read until no more digits */
|
||||
while (width!=0 && (nch!=_EOF_) && _ISDIGIT_(nch)) {
|
||||
cur = cur*base + _CHAR2DIGIT_(nch, base);
|
||||
nch = _GETC_(file);
|
||||
if (width>0) width--;
|
||||
seendigit=1;
|
||||
}
|
||||
/* okay, done! */
|
||||
if (!seendigit) break; /* not a valid number */
|
||||
st = 1;
|
||||
if (!suppress) {
|
||||
#define _SET_NUMBER_(type) *va_arg(ap, type*) = negative ? -cur : cur
|
||||
if (number_signed) {
|
||||
if (l_prefix) _SET_NUMBER_(long int);
|
||||
else if (h_prefix) _SET_NUMBER_(short int);
|
||||
else _SET_NUMBER_(int);
|
||||
} else {
|
||||
if (negative) {
|
||||
WARN("Dropping sign in reading a negative number into an unsigned value");
|
||||
negative = 0;
|
||||
}
|
||||
if (l_prefix) _SET_NUMBER_(unsigned long int);
|
||||
else if (h_prefix)
|
||||
_SET_NUMBER_(unsigned short int);
|
||||
else _SET_NUMBER_(unsigned int);
|
||||
}
|
||||
}
|
||||
}
|
||||
break;
|
||||
case _L_('e'):
|
||||
case _L_('E'):
|
||||
case _L_('f'):
|
||||
case _L_('g'):
|
||||
case _L_('G'): { /* read a float */
|
||||
long double cur = 0;
|
||||
int negative = 0;
|
||||
/* skip initial whitespace */
|
||||
while ((nch!=_EOF_) && _ISSPACE_(nch))
|
||||
nch = _GETC_(file);
|
||||
/* get sign. */
|
||||
if (nch == _L_('-') || nch == _L_('+')) {
|
||||
negative = (nch==_L_('-'));
|
||||
if (width>0) width--;
|
||||
if (width==0) break;
|
||||
nch = _GETC_(file);
|
||||
}
|
||||
/* get first digit. */
|
||||
if (!_ISDIGIT_(nch)) break;
|
||||
cur = (nch - _L_('0')) * (negative ? -1 : 1);
|
||||
nch = _GETC_(file);
|
||||
if (width>0) width--;
|
||||
/* read until no more digits */
|
||||
while (width!=0 && (nch!=_EOF_) && _ISDIGIT_(nch)) {
|
||||
cur = cur*10 + (nch - _L_('0'));
|
||||
nch = _GETC_(file);
|
||||
if (width>0) width--;
|
||||
}
|
||||
/* handle decimals */
|
||||
if (width!=0 && nch == _L_('.')) {
|
||||
float dec = 1;
|
||||
nch = _GETC_(file);
|
||||
if (width>0) width--;
|
||||
while (width!=0 && (nch!=_EOF_) && _ISDIGIT_(nch)) {
|
||||
dec /= 10;
|
||||
cur += dec * (nch - _L_('0'));
|
||||
nch = _GETC_(file);
|
||||
if (width>0) width--;
|
||||
}
|
||||
}
|
||||
/* handle exponent */
|
||||
if (width!=0 && (nch == _L_('e') || nch == _L_('E'))) {
|
||||
int exponent = 0, negexp = 0;
|
||||
float expcnt;
|
||||
nch = _GETC_(file);
|
||||
if (width>0) width--;
|
||||
/* possible sign on the exponent */
|
||||
if (width!=0 && (nch==_L_('+') || nch==_L_('-'))) {
|
||||
negexp = (nch==_L_('-'));
|
||||
nch = _GETC_(file);
|
||||
if (width>0) width--;
|
||||
}
|
||||
/* exponent digits */
|
||||
while (width!=0 && (nch!=_EOF_) && _ISDIGIT_(nch)) {
|
||||
exponent *= 10;
|
||||
exponent += (nch - _L_('0'));
|
||||
nch = _GETC_(file);
|
||||
if (width>0) width--;
|
||||
}
|
||||
/* update 'cur' with this exponent. */
|
||||
expcnt = negexp ? .1 : 10;
|
||||
while (exponent!=0) {
|
||||
if (exponent&1)
|
||||
cur*=expcnt;
|
||||
exponent/=2;
|
||||
expcnt=expcnt*expcnt;
|
||||
}
|
||||
}
|
||||
st = 1;
|
||||
if (!suppress) {
|
||||
if (L_prefix) _SET_NUMBER_(long double);
|
||||
else if (l_prefix) _SET_NUMBER_(double);
|
||||
else _SET_NUMBER_(float);
|
||||
}
|
||||
}
|
||||
break;
|
||||
/* According to
|
||||
* http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_crt_scanf_type_field_characters.asp
|
||||
* 's' reads a character string in a call to fscanf
|
||||
* and 'S' a wide character string and vice versa in a
|
||||
* call to fwscanf. The 'h', 'w' and 'l' prefixes override
|
||||
* this behaviour. 'h' forces reading char * but 'l' and 'w'
|
||||
* force reading WCHAR. */
|
||||
case _L_('s'):
|
||||
if (w_prefix || l_prefix) goto widecharstring;
|
||||
else if (h_prefix) goto charstring;
|
||||
#ifdef WIDE_SCANF
|
||||
else goto widecharstring;
|
||||
#else /* WIDE_SCANF */
|
||||
else goto charstring;
|
||||
#endif /* WIDE_SCANF */
|
||||
case _L_('S'):
|
||||
if (w_prefix || l_prefix) goto widecharstring;
|
||||
else if (h_prefix) goto charstring;
|
||||
#ifdef WIDE_SCANF
|
||||
else goto charstring;
|
||||
#else /* WIDE_SCANF */
|
||||
else goto widecharstring;
|
||||
#endif /* WIDE_SCANF */
|
||||
charstring: { /* read a word into a char */
|
||||
char*str = suppress ? NULL : va_arg(ap, char*);
|
||||
char*sptr = str;
|
||||
/* skip initial whitespace */
|
||||
while ((nch!=_EOF_) && _ISSPACE_(nch))
|
||||
nch = _GETC_(file);
|
||||
/* read until whitespace */
|
||||
while (width!=0 && (nch!=_EOF_) && !_ISSPACE_(nch)) {
|
||||
#ifdef WIDE_SCANF
|
||||
if (!suppress) *sptr++ = _CONVERT_(nch);
|
||||
#else /* WIDE_SCANF */
|
||||
if (!suppress) *sptr++ = nch;
|
||||
#endif /* WIDE_SCANF */
|
||||
st++;
|
||||
nch = _GETC_(file);
|
||||
if (width>0) width--;
|
||||
}
|
||||
/* terminate */
|
||||
if (!suppress) *sptr = 0;
|
||||
}
|
||||
break;
|
||||
widecharstring: { /* read a word into a WCHAR * */
|
||||
WCHAR*str =
|
||||
suppress ? NULL : va_arg(ap, WCHAR*);
|
||||
WCHAR*sptr = str;
|
||||
/* skip initial whitespace */
|
||||
while ((nch!=_EOF_) && _ISSPACE_(nch))
|
||||
nch = _GETC_(file);
|
||||
/* read until whitespace */
|
||||
while (width!=0 && (nch!=_EOF_) && !_ISSPACE_(nch)) {
|
||||
#ifdef WIDE_SCANF
|
||||
if (!suppress) *sptr++ = nch;
|
||||
#else /* WIDE_SCANF */
|
||||
if (!suppress) *sptr++ = _CONVERT_(nch);
|
||||
#endif /* WIDE_SCANF */
|
||||
st++;
|
||||
nch = _GETC_(file);
|
||||
if (width>0) width--;
|
||||
}
|
||||
/* terminate */
|
||||
if (!suppress) *sptr = 0;
|
||||
}
|
||||
break;
|
||||
/* 'c' and 'C work analogously to 's' and 'S' as described
|
||||
* above */
|
||||
case _L_('c'):
|
||||
if (w_prefix || l_prefix) goto widecharacter;
|
||||
else if (h_prefix) goto character;
|
||||
#ifdef WIDE_SCANF
|
||||
else goto widecharacter;
|
||||
#else /* WIDE_SCANF */
|
||||
else goto character;
|
||||
#endif /* WIDE_SCANF */
|
||||
case _L_('C'):
|
||||
if (w_prefix || l_prefix) goto widecharacter;
|
||||
else if (h_prefix) goto character;
|
||||
#ifdef WIDE_SCANF
|
||||
else goto character;
|
||||
#else /* WIDE_SCANF */
|
||||
else goto widecharacter;
|
||||
#endif /* WIDE_SCANF */
|
||||
character: { /* read single character into char */
|
||||
if (!suppress) {
|
||||
char*c = va_arg(ap, char*);
|
||||
#ifdef WIDE_SCANF
|
||||
*c = _CONVERT_(nch);
|
||||
#else /* WIDE_SCANF */
|
||||
*c = nch;
|
||||
#endif /* WIDE_SCANF */
|
||||
st = 1;
|
||||
}
|
||||
nch = _GETC_(file);
|
||||
}
|
||||
break;
|
||||
widecharacter: {
|
||||
if (!suppress) { /* read single character into WCHAR */
|
||||
WCHAR*c = va_arg(ap, WCHAR*);
|
||||
#ifdef WIDE_SCANF
|
||||
*c = nch;
|
||||
#else /* WIDE_SCANF */
|
||||
*c = _CONVERT_(nch);
|
||||
#endif /* WIDE_SCANF */
|
||||
st = 1;
|
||||
}
|
||||
nch = _GETC_(file);
|
||||
}
|
||||
break;
|
||||
case _L_('n'): {
|
||||
if (!suppress) {
|
||||
int*n = va_arg(ap, int*);
|
||||
*n = rd;
|
||||
}
|
||||
}
|
||||
break;
|
||||
default: FIXME("unhandled: %%%c\n", *format);
|
||||
/* 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 %%."
|
||||
* LEAVING AS-IS because we catch bugs better that way. */
|
||||
}
|
||||
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 {
|
||||
/* check for character match */
|
||||
if (nch == *format) {
|
||||
nch = _GETC_(file);
|
||||
} else break;
|
||||
}
|
||||
format++;
|
||||
}
|
||||
if (nch!=_EOF_) {
|
||||
_UNGETC_(nch, file);
|
||||
}
|
||||
va_end(ap);
|
||||
TRACE("returning %d\n", rd);
|
||||
return rd;
|
||||
}
|
||||
|
||||
#undef _L_
|
||||
#undef _CHAR_
|
||||
#undef _EOF_
|
||||
#undef _ISSPACE_
|
||||
#undef _ISDIGIT_
|
||||
#undef _CONVERT_
|
||||
#undef _CHAR2DIGIT_
|
||||
#undef _GETC_
|
||||
#undef _UNGETC_
|
||||
#undef _FUNCTION_
|
||||
|
|
@ -206,7 +206,7 @@ MSVCRT(wint_t) MSVCRT(putwc)(MSVCRT(wint_t),MSVCRT(FILE)*);
|
|||
MSVCRT(wint_t) MSVCRT(putwchar)(MSVCRT(wint_t));
|
||||
int MSVCRT(putws)(const WCHAR*);
|
||||
int MSVCRT(swprintf)(WCHAR*,const WCHAR*,...);
|
||||
int MSVCRT(swscanf)(WCHAR*,const WCHAR*,...);
|
||||
int MSVCRT(swscanf)(const WCHAR*,const WCHAR*,...);
|
||||
MSVCRT(wint_t) MSVCRT(ungetwc)(MSVCRT(wint_t),MSVCRT(FILE)*);
|
||||
int MSVCRT(vfwprintf)(MSVCRT(FILE)*,const WCHAR*,va_list);
|
||||
int MSVCRT(vswprintf)(WCHAR*,const WCHAR*,va_list);
|
||||
|
|
|
|||
Loading…
Reference in New Issue