diff options
Diffstat (limited to 'stdio-common/vfscanf.c')
| -rw-r--r-- | stdio-common/vfscanf.c | 224 |
1 files changed, 166 insertions, 58 deletions
diff --git a/stdio-common/vfscanf.c b/stdio-common/vfscanf.c index a778346..a3c0584 100644 --- a/stdio-common/vfscanf.c +++ b/stdio-common/vfscanf.c @@ -34,23 +34,79 @@ Cambridge, MA 02139, USA. */ #define LONGLONG long #endif - -#define inchar() ((c = getc(s)) == EOF ? EOF : (++read_in, c)) -#define conv_error() return (ungetc(c, s), done) -#define input_error() return (done == 0 ? EOF : done) -#define memory_error() return ((errno = ENOMEM), EOF) +#ifdef USE_IN_LIBIO +# include <libioP.h> +# include <libio.h> + +/* Those are flags in the conversion format. */ +# define LONG 0x01 /* l: long or double */ +# define LONGDBL 0x02 /* L: long long or long double */ +# define SHORT 0x04 /* h: short */ +# define SUPPRESS 0x08 /* suppress assignment */ +# define POINTER 0x10 /* weird %p pointer (`fake hex') */ +# define NOSKIP 0x20 /* do not skip blanks */ +# define WIDTH 0x40 /* width */ + + +# define va_list _IO_va_list +# define ungetc(c, s) _IO_ungetc (c, s) +# define inchar() ((c = _IO_getc(s)), ++read_in, c) +# define conv_error() return ((errp != NULL && (*errp |= 2)), \ + (c == EOF || _IO_ungetc(c, s)), done) + +# define input_error() return ((errp != NULL && (*errp |= 1)), \ + done == 0 ? EOF : done) +# define memory_error() return ((errno = ENOMEM), EOF) +# define ARGCHECK(s, format) \ + do \ + { \ + /* Check file argument for consistence. */ \ + CHECK_FILE (s, -1); \ + if (s->_flags & _IO_NO_READS || format == NULL) \ + { \ + MAYBE_SET_EINVAL; \ + return -1; \ + } \ + } while (0) +#else +# define inchar() ((c = getc(s)) == EOF ? EOF : (++read_in, c)) +# define conv_error() return (ungetc(c, s), done) +# define input_error() return (done == 0 ? EOF : done) +# define memory_error() return ((errno = ENOMEM), EOF) +# define ARGCHECK(s, format) \ + do \ + { \ + /* Check file argument for consistence. */ \ + if (!__validfp (s) || !s->__mode.__read || format == NULL) \ + { \ + errno = EINVAL; \ + return -1; \ + } \ + } while (0) +#endif /* Read formatted input from S according to the format string FORMAT, using the argument list in ARG. Return the number of assignments made, or -1 for an input error. */ +#ifdef USE_IN_LIBIO int -DEFUN(__vfscanf, (s, format, arg), - FILE *s AND CONST char *format AND va_list argptr) +_IO_vfscanf (s, format, argptr, errp) + _IO_FILE *s; + const char *format; + _IO_va_list argptr; + int *errp; +#else +int +__vfscanf (s, format, arg) + FILE *s; + const char *format; + va_list argptr; +#endif { va_list arg = (va_list) argptr; - register CONST char *f = format; + register const char *f = format; register char fc; /* Current character of the format. */ register size_t done = 0; /* Assignments done. */ register size_t read_in = 0; /* Chars read in. */ @@ -58,14 +114,17 @@ DEFUN(__vfscanf, (s, format, arg), register int do_assign; /* Whether to do an assignment. */ register int width; /* Maximum field width. */ int group_flag; /* %' modifier flag. */ +#ifdef USE_IN_LIBIO + int flags; /* Trace flags for current format element. */ +#endif /* Type modifiers. */ int is_short, is_long, is_long_double; #ifdef HAVE_LONGLONG /* We use the `L' modifier for `long long int'. */ -#define is_longlong is_long_double +# define is_longlong is_long_double #else -#define is_longlong 0 +# define is_longlong 0 #endif int malloc_string; /* Args are char ** to be filled in. */ /* Status for reading F-P nums. */ @@ -92,18 +151,14 @@ DEFUN(__vfscanf, (s, format, arg), char *w; /* Pointer into WORK. */ wchar_t decimal; /* Decimal point character. */ - if (!__validfp(s) || !s->__mode.__read || format == NULL) - { - errno = EINVAL; - return EOF; - } + ARGCHECK (s, format); /* Figure out the decimal point character. */ if (mbtowc (&decimal, _NL_CURRENT (LC_NUMERIC, DECIMAL_POINT), strlen (_NL_CURRENT (LC_NUMERIC, DECIMAL_POINT))) <= 0) decimal = (wchar_t) *_NL_CURRENT (LC_NUMERIC, DECIMAL_POINT); - c = inchar(); + c = inchar (); /* Run through the format string. */ while (*f != '\0') @@ -112,27 +167,38 @@ DEFUN(__vfscanf, (s, format, arg), /* Extract the next argument, which is of type TYPE. For a %N$... spec, this is the Nth argument from the beginning; otherwise it is the next argument after the state now in ARG. */ -#define ARG(type) (argpos == 0 ? va_arg (arg, type) : \ +#if 0 + /* XXX Possible optimization. */ +# define ARG(type) (argpos == 0 ? va_arg (arg, type) : \ + ({ va_list arg = (va_list) argptr; \ + arg = (va_list) ((char *) arg \ + + (argpos - 1) \ + * __va_rounded_size (void *)); \ + va_arg (arg, type); \ + })) +#else +# define ARG(type) (argpos == 0 ? va_arg (arg, type) : \ ({ unsigned int pos = argpos; \ va_list arg = (va_list) argptr; \ while (--pos > 0) \ (void) va_arg (arg, void *); \ va_arg (arg, type); \ })) +#endif if (!isascii (*f)) { /* Non-ASCII, may be a multibyte. */ - int len = mblen (f, strlen(f)); + int len = mblen (f, strlen (f)); if (len > 0) { while (len-- > 0) if (c == EOF) - input_error(); + input_error (); else if (c == *f++) - (void) inchar(); + (void) inchar (); else - conv_error(); + conv_error (); continue; } } @@ -142,8 +208,8 @@ DEFUN(__vfscanf, (s, format, arg), { /* Characters other than format specs must just match. */ if (c == EOF) - input_error(); - if (isspace(fc)) + input_error (); + if (isspace (fc)) { /* Whitespace characters match any amount of whitespace. */ while (isspace (c)) @@ -151,12 +217,17 @@ DEFUN(__vfscanf, (s, format, arg), continue; } else if (c == fc) - (void) inchar(); + (void) inchar (); else - conv_error(); + conv_error (); continue; } +#ifdef USE_IN_LIBIO + /* That is the start of the coversion string. */ + flags = 0; +#endif + /* Initialize state of modifiers. */ argpos = 0; do_assign = 1; @@ -185,6 +256,9 @@ DEFUN(__vfscanf, (s, format, arg), switch (*f++) { case '*': +#ifdef USE_IN_LIBIO + flags = SUPPRESS; +#endif do_assign = 0; break; case '\'': @@ -192,9 +266,15 @@ DEFUN(__vfscanf, (s, format, arg), break; } +#ifdef USE_IN_LIBIO + /* We have seen width. */ + if (isdigit (*f)) + flags |= WIDTH; +#endif + /* Find the maximum field width. */ width = 0; - while (isdigit(*f)) + while (isdigit (*f)) { width *= 10; width += *f++ - '0'; @@ -209,19 +289,44 @@ DEFUN(__vfscanf, (s, format, arg), { case 'h': /* int's are short int's. */ +#ifdef USE_IN_LIBIO + if (flags & ~(SUPPRESS | WIDTH)) + /* Signal illegal format element. */ + conv_error (); + flags |= SHORT; +#endif is_short = 1; break; case 'l': if (is_long) - /* A double `l' is equivalent to an `L'. */ - is_longlong = 1; + { + /* A double `l' is equivalent to an `L'. */ +#ifdef USE_IN_LIBIO + if ((flags & ~(SUPPRESS | WIDTH)) && (flags & LONGDBL)) + conv_error (); + flags &= ~LONG; + flags |= LONGDBL; +#endif + is_longlong = 1; + } else - /* int's are long int's. */ - is_long = 1; + { + /* int's are long int's. */ +#ifdef USE_IN_LIBIO + flags |= LONG; +#endif + is_long = 1; + } break; case 'q': case 'L': /* double's are long double's, and int's are long long int's. */ +#ifdef USE_IN_LIBIO + if (flags & ~(SUPPRESS | WIDTH)) + /* Signal illegal format element. */ + conv_error (); + flags |= LONGDBL; +#endif is_long_double = 1; break; case 'a': @@ -233,20 +338,20 @@ DEFUN(__vfscanf, (s, format, arg), /* End of the format string? */ if (*f == '\0') - conv_error(); + conv_error (); /* Find the conversion specifier. */ w = work; fc = *f++; if (fc != '[' && fc != 'c' && fc != 'n') /* Eat whitespace. */ - while (isspace(c)) - (void) inchar(); + while (isspace (c)) + (void) inchar (); switch (fc) { case '%': /* Must match a literal '%'. */ if (c != fc) - conv_error(); + conv_error (); break; case 'n': /* Answer number of assignments done. */ @@ -263,7 +368,7 @@ DEFUN(__vfscanf, (s, format, arg), } if (c == EOF) - input_error(); + input_error (); if (width == -1) width = 1; @@ -272,10 +377,10 @@ DEFUN(__vfscanf, (s, format, arg), { do *str++ = c; - while (inchar() != EOF && --width > 0); + while (inchar () != EOF && --width > 0); } else - while (inchar() != EOF && --width > 0); + while (inchar () != EOF && --width > 0); if (do_assign) ++done; @@ -289,7 +394,7 @@ DEFUN(__vfscanf, (s, format, arg), if (malloc_string) \ { \ /* The string is to be stored in a malloc'd buffer. */ \ - strptr = ARG (char **); \ + strptr = ARG (char **); \ if (strptr == NULL) \ conv_error (); \ /* Allocate an initial buffer. */ \ @@ -297,7 +402,7 @@ DEFUN(__vfscanf, (s, format, arg), *strptr = str = malloc (strsize); \ } \ else \ - str = ARG (char *); \ + str = ARG (char *); \ if (str == NULL) \ conv_error (); \ } @@ -357,7 +462,7 @@ DEFUN(__vfscanf, (s, format, arg), break; case 'x': /* Hexadecimal integer. */ - case 'X': /* Ditto. */ + case 'X': /* Ditto. */ base = 16; number_signed = 0; goto number; @@ -383,7 +488,7 @@ DEFUN(__vfscanf, (s, format, arg), number: if (c == EOF) - input_error(); + input_error (); /* Check for a sign. */ if (c == '-' || c == '+') @@ -391,7 +496,7 @@ DEFUN(__vfscanf, (s, format, arg), *w++ = c; if (width > 0) --width; - (void) inchar(); + (void) inchar (); } /* Look for a leading indication of base. */ @@ -401,9 +506,9 @@ DEFUN(__vfscanf, (s, format, arg), --width; *w++ = '0'; - (void) inchar(); + (void) inchar (); - if (tolower(c) == 'x') + if (tolower (c) == 'x') { if (base == 0) base = 16; @@ -411,7 +516,7 @@ DEFUN(__vfscanf, (s, format, arg), { if (width > 0) --width; - (void) inchar(); + (void) inchar (); } } else if (base == 0) @@ -422,21 +527,21 @@ DEFUN(__vfscanf, (s, format, arg), base = 10; /* Read the number into WORK. */ - while (width != 0 && c != EOF) + do { - if (base == 16 ? !isxdigit(c) : - (!isdigit(c) || c - '0' >= base)) + if (base == 16 ? !isxdigit (c) : + (!isdigit (c) || c - '0' >= base)) break; *w++ = c; if (width > 0) --width; - (void) inchar (); } + while (inchar () != EOF && width != 0); if (w == work || (w - work == 1 && (work[0] == '+' || work[0] == '-'))) /* There was no number. */ - conv_error(); + conv_error (); /* Convert the number. */ *w = '\0'; @@ -492,15 +597,15 @@ DEFUN(__vfscanf, (s, format, arg), case 'g': case 'G': if (c == EOF) - input_error(); + input_error (); /* Check for a sign. */ if (c == '-' || c == '+') { *w++ = c; - if (inchar() == EOF) + if (inchar () == EOF) /* EOF is only an input error before we read any chars. */ - conv_error(); + conv_error (); if (width > 0) --width; } @@ -508,11 +613,11 @@ DEFUN(__vfscanf, (s, format, arg), got_dot = got_e = 0; do { - if (isdigit(c)) + if (isdigit (c)) *w++ = c; else if (got_e && w[-1] == 'e' && (c == '-' || c == '+')) *w++ = c; - else if (!got_e && tolower(c) == 'e') + else if (!got_e && tolower (c) == 'e') { *w++ = 'e'; got_e = got_dot = 1; @@ -526,12 +631,12 @@ DEFUN(__vfscanf, (s, format, arg), break; if (width > 0) --width; - } while (inchar() != EOF && width != 0); + } while (inchar () != EOF && width != 0); if (w == work) conv_error(); if (w[-1] == '-' || w[-1] == '+' || w[-1] == 'e') - conv_error(); + conv_error (); /* Convert the number. */ *w = '\0'; @@ -614,11 +719,14 @@ DEFUN(__vfscanf, (s, format, arg), base = 16; /* A PTR must be the same size as a `long int'. */ is_long = 1; + number_signed = 0; goto number; } } - conv_error(); + return ((c == EOF || ungetc (c, s)), done); } +#ifndef USE_IN_LIBIO weak_alias (__vfscanf, vfscanf) +#endif |