summaryrefslogtreecommitdiff
path: root/contrib/sendmail/libsm/vfscanf.c
diff options
context:
space:
mode:
Diffstat (limited to 'contrib/sendmail/libsm/vfscanf.c')
-rw-r--r--contrib/sendmail/libsm/vfscanf.c875
1 files changed, 0 insertions, 875 deletions
diff --git a/contrib/sendmail/libsm/vfscanf.c b/contrib/sendmail/libsm/vfscanf.c
deleted file mode 100644
index d7f1a3d746c8..000000000000
--- a/contrib/sendmail/libsm/vfscanf.c
+++ /dev/null
@@ -1,875 +0,0 @@
-/*
- * Copyright (c) 2000-2001, 2004 Sendmail, Inc. and its suppliers.
- * All rights reserved.
- * Copyright (c) 1990, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Chris Torek.
- *
- * By using this file, you agree to the terms and conditions set
- * forth in the LICENSE file which can be found at the top level of
- * the sendmail distribution.
- */
-
-#include <sm/gen.h>
-SM_IDSTR(id, "@(#)$Id: vfscanf.c,v 1.52 2004/08/03 20:56:32 ca Exp $")
-
-#include <ctype.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <setjmp.h>
-#include <sys/time.h>
-#include <sm/varargs.h>
-#include <sm/config.h>
-#include <sm/io.h>
-#include <sm/signal.h>
-#include <sm/clock.h>
-#include <sm/string.h>
-#include "local.h"
-
-#define BUF 513 /* Maximum length of numeric string. */
-
-/* Flags used during conversion. */
-#define LONG 0x01 /* l: long or double */
-#define SHORT 0x04 /* h: short */
-#define QUAD 0x08 /* q: quad (same as ll) */
-#define SUPPRESS 0x10 /* suppress assignment */
-#define POINTER 0x20 /* weird %p pointer (`fake hex') */
-#define NOSKIP 0x40 /* do not skip blanks */
-
-/*
-** The following are used in numeric conversions only:
-** SIGNOK, NDIGITS, DPTOK, and EXPOK are for floating point;
-** SIGNOK, NDIGITS, PFXOK, and NZDIGITS are for integral.
-*/
-
-#define SIGNOK 0x080 /* +/- is (still) legal */
-#define NDIGITS 0x100 /* no digits detected */
-
-#define DPTOK 0x200 /* (float) decimal point is still legal */
-#define EXPOK 0x400 /* (float) exponent (e+3, etc) still legal */
-
-#define PFXOK 0x200 /* 0x prefix is (still) legal */
-#define NZDIGITS 0x400 /* no zero digits detected */
-
-/* Conversion types. */
-#define CT_CHAR 0 /* %c conversion */
-#define CT_CCL 1 /* %[...] conversion */
-#define CT_STRING 2 /* %s conversion */
-#define CT_INT 3 /* integer, i.e., strtoll or strtoull */
-#define CT_FLOAT 4 /* floating, i.e., strtod */
-
-static void scanalrm __P((int));
-static unsigned char *sm_sccl __P((char *, unsigned char *));
-static jmp_buf ScanTimeOut;
-
-/*
-** SCANALRM -- handler when timeout activated for sm_io_vfscanf()
-**
-** Returns flow of control to where setjmp(ScanTimeOut) was set.
-**
-** Parameters:
-** sig -- unused
-**
-** Returns:
-** does not return
-**
-** Side Effects:
-** returns flow of control to setjmp(ScanTimeOut).
-**
-** NOTE: THIS CAN BE CALLED FROM A SIGNAL HANDLER. DO NOT ADD
-** ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
-** DOING.
-*/
-
-/* ARGSUSED0 */
-static void
-scanalrm(sig)
- int sig;
-{
- longjmp(ScanTimeOut, 1);
-}
-
-/*
-** SM_VFSCANF -- convert input into data units
-**
-** Parameters:
-** fp -- file pointer for input data
-** timeout -- time intvl allowed to complete (milliseconds)
-** fmt0 -- format for finding data units
-** ap -- vectors for memory location for storing data units
-**
-** Results:
-** Success: number of data units assigned
-** Failure: SM_IO_EOF
-*/
-
-int
-sm_vfscanf(fp, timeout, fmt0, ap)
- register SM_FILE_T *fp;
- int SM_NONVOLATILE timeout;
- char const *fmt0;
- va_list SM_NONVOLATILE ap;
-{
- register unsigned char *SM_NONVOLATILE fmt = (unsigned char *) fmt0;
- register int c; /* character from format, or conversion */
- register size_t width; /* field width, or 0 */
- register char *p; /* points into all kinds of strings */
- register int n; /* handy integer */
- register int flags; /* flags as defined above */
- register char *p0; /* saves original value of p when necessary */
- int nassigned; /* number of fields assigned */
- int nread; /* number of characters consumed from fp */
- int base; /* base argument to strtoll/strtoull */
- ULONGLONG_T (*ccfn)(); /* conversion function (strtoll/strtoull) */
- char ccltab[256]; /* character class table for %[...] */
- char buf[BUF]; /* buffer for numeric conversions */
- SM_EVENT *evt = NULL;
-
- /* `basefix' is used to avoid `if' tests in the integer scanner */
- static short basefix[17] =
- { 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
-
- if (timeout == SM_TIME_DEFAULT)
- timeout = fp->f_timeout;
- if (timeout == SM_TIME_IMMEDIATE)
- {
- /*
- ** Filling the buffer will take time and we are wanted to
- ** return immediately. So...
- */
-
- errno = EAGAIN;
- return SM_IO_EOF;
- }
-
- if (timeout != SM_TIME_FOREVER)
- {
- if (setjmp(ScanTimeOut) != 0)
- {
- errno = EAGAIN;
- return SM_IO_EOF;
- }
-
- evt = sm_seteventm(timeout, scanalrm, 0);
- }
-
- nassigned = 0;
- nread = 0;
- base = 0; /* XXX just to keep gcc happy */
- ccfn = NULL; /* XXX just to keep gcc happy */
- for (;;)
- {
- c = *fmt++;
- if (c == 0)
- {
- if (evt != NULL)
- sm_clrevent(evt); /* undo our timeout */
- return nassigned;
- }
- if (isspace(c))
- {
- while ((fp->f_r > 0 || sm_refill(fp, SM_TIME_FOREVER)
- == 0) &&
- isspace(*fp->f_p))
- nread++, fp->f_r--, fp->f_p++;
- continue;
- }
- if (c != '%')
- goto literal;
- width = 0;
- flags = 0;
-
- /*
- ** switch on the format. continue if done;
- ** break once format type is derived.
- */
-
-again: c = *fmt++;
- switch (c)
- {
- case '%':
-literal:
- if (fp->f_r <= 0 && sm_refill(fp, SM_TIME_FOREVER))
- goto input_failure;
- if (*fp->f_p != c)
- goto match_failure;
- fp->f_r--, fp->f_p++;
- nread++;
- continue;
-
- case '*':
- flags |= SUPPRESS;
- goto again;
- case 'h':
- flags |= SHORT;
- goto again;
- case 'l':
- if (*fmt == 'l')
- {
- fmt++;
- flags |= QUAD;
- }
- else
- {
- flags |= LONG;
- }
- goto again;
- case 'q':
- flags |= QUAD;
- goto again;
-
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- width = width * 10 + c - '0';
- goto again;
-
- /*
- ** Conversions.
- ** Those marked `compat' are for 4.[123]BSD compatibility.
- **
- ** (According to ANSI, E and X formats are supposed
- ** to the same as e and x. Sorry about that.)
- */
-
- case 'D': /* compat */
- flags |= LONG;
- /* FALLTHROUGH */
- case 'd':
- c = CT_INT;
- ccfn = (ULONGLONG_T (*)())sm_strtoll;
- base = 10;
- break;
-
- case 'i':
- c = CT_INT;
- ccfn = (ULONGLONG_T (*)())sm_strtoll;
- base = 0;
- break;
-
- case 'O': /* compat */
- flags |= LONG;
- /* FALLTHROUGH */
- case 'o':
- c = CT_INT;
- ccfn = sm_strtoull;
- base = 8;
- break;
-
- case 'u':
- c = CT_INT;
- ccfn = sm_strtoull;
- base = 10;
- break;
-
- case 'X':
- case 'x':
- flags |= PFXOK; /* enable 0x prefixing */
- c = CT_INT;
- ccfn = sm_strtoull;
- base = 16;
- break;
-
- case 'E':
- case 'G':
- case 'e':
- case 'f':
- case 'g':
- c = CT_FLOAT;
- break;
-
- case 's':
- c = CT_STRING;
- break;
-
- case '[':
- fmt = sm_sccl(ccltab, fmt);
- flags |= NOSKIP;
- c = CT_CCL;
- break;
-
- case 'c':
- flags |= NOSKIP;
- c = CT_CHAR;
- break;
-
- case 'p': /* pointer format is like hex */
- flags |= POINTER | PFXOK;
- c = CT_INT;
- ccfn = sm_strtoull;
- base = 16;
- break;
-
- case 'n':
- if (flags & SUPPRESS) /* ??? */
- continue;
- if (flags & SHORT)
- *SM_VA_ARG(ap, short *) = nread;
- else if (flags & LONG)
- *SM_VA_ARG(ap, long *) = nread;
- else
- *SM_VA_ARG(ap, int *) = nread;
- continue;
-
- /* Disgusting backwards compatibility hacks. XXX */
- case '\0': /* compat */
- if (evt != NULL)
- sm_clrevent(evt); /* undo our timeout */
- return SM_IO_EOF;
-
- default: /* compat */
- if (isupper(c))
- flags |= LONG;
- c = CT_INT;
- ccfn = (ULONGLONG_T (*)()) sm_strtoll;
- base = 10;
- break;
- }
-
- /* We have a conversion that requires input. */
- if (fp->f_r <= 0 && sm_refill(fp, SM_TIME_FOREVER))
- goto input_failure;
-
- /*
- ** Consume leading white space, except for formats
- ** that suppress this.
- */
-
- if ((flags & NOSKIP) == 0)
- {
- while (isspace(*fp->f_p))
- {
- nread++;
- if (--fp->f_r > 0)
- fp->f_p++;
- else if (sm_refill(fp, SM_TIME_FOREVER))
- goto input_failure;
- }
- /*
- ** Note that there is at least one character in
- ** the buffer, so conversions that do not set NOSKIP
- ** can no longer result in an input failure.
- */
- }
-
- /* Do the conversion. */
- switch (c)
- {
- case CT_CHAR:
- /* scan arbitrary characters (sets NOSKIP) */
- if (width == 0)
- width = 1;
- if (flags & SUPPRESS)
- {
- size_t sum = 0;
- for (;;)
- {
- if ((size_t) (n = fp->f_r) < width)
- {
- sum += n;
- width -= n;
- fp->f_p += n;
- if (sm_refill(fp,
- SM_TIME_FOREVER))
- {
- if (sum == 0)
- goto input_failure;
- break;
- }
- }
- else
- {
- sum += width;
- fp->f_r -= width;
- fp->f_p += width;
- break;
- }
- }
- nread += sum;
- }
- else
- {
- size_t r;
-
- r = sm_io_read(fp, SM_TIME_FOREVER,
- (void *) SM_VA_ARG(ap, char *),
- width);
- if (r == 0)
- goto input_failure;
- nread += r;
- nassigned++;
- }
- break;
-
- case CT_CCL:
- /* scan a (nonempty) character class (sets NOSKIP) */
- if (width == 0)
- width = (size_t)~0; /* `infinity' */
-
- /* take only those things in the class */
- if (flags & SUPPRESS)
- {
- n = 0;
- while (ccltab[*fp->f_p] != '\0')
- {
- n++, fp->f_r--, fp->f_p++;
- if (--width == 0)
- break;
- if (fp->f_r <= 0 &&
- sm_refill(fp, SM_TIME_FOREVER))
- {
- if (n == 0) /* XXX how? */
- goto input_failure;
- break;
- }
- }
- if (n == 0)
- goto match_failure;
- }
- else
- {
- p0 = p = SM_VA_ARG(ap, char *);
- while (ccltab[*fp->f_p] != '\0')
- {
- fp->f_r--;
- *p++ = *fp->f_p++;
- if (--width == 0)
- break;
- if (fp->f_r <= 0 &&
- sm_refill(fp, SM_TIME_FOREVER))
- {
- if (p == p0)
- goto input_failure;
- break;
- }
- }
- n = p - p0;
- if (n == 0)
- goto match_failure;
- *p = 0;
- nassigned++;
- }
- nread += n;
- break;
-
- case CT_STRING:
- /* like CCL, but zero-length string OK, & no NOSKIP */
- if (width == 0)
- width = (size_t)~0;
- if (flags & SUPPRESS)
- {
- n = 0;
- while (!isspace(*fp->f_p))
- {
- n++, fp->f_r--, fp->f_p++;
- if (--width == 0)
- break;
- if (fp->f_r <= 0 &&
- sm_refill(fp, SM_TIME_FOREVER))
- break;
- }
- nread += n;
- }
- else
- {
- p0 = p = SM_VA_ARG(ap, char *);
- while (!isspace(*fp->f_p))
- {
- fp->f_r--;
- *p++ = *fp->f_p++;
- if (--width == 0)
- break;
- if (fp->f_r <= 0 &&
- sm_refill(fp, SM_TIME_FOREVER))
- break;
- }
- *p = 0;
- nread += p - p0;
- nassigned++;
- }
- continue;
-
- case CT_INT:
- /* scan an integer as if by strtoll/strtoull */
-#if SM_CONF_BROKEN_SIZE_T
- if (width == 0 || width > sizeof(buf) - 1)
- width = sizeof(buf) - 1;
-#else /* SM_CONF_BROKEN_SIZE_T */
- /* size_t is unsigned, hence this optimisation */
- if (--width > sizeof(buf) - 2)
- width = sizeof(buf) - 2;
- width++;
-#endif /* SM_CONF_BROKEN_SIZE_T */
- flags |= SIGNOK | NDIGITS | NZDIGITS;
- for (p = buf; width > 0; width--)
- {
- c = *fp->f_p;
-
- /*
- ** Switch on the character; `goto ok'
- ** if we accept it as a part of number.
- */
-
- switch (c)
- {
-
- /*
- ** The digit 0 is always legal, but is
- ** special. For %i conversions, if no
- ** digits (zero or nonzero) have been
- ** scanned (only signs), we will have
- ** base==0. In that case, we should set
- ** it to 8 and enable 0x prefixing.
- ** Also, if we have not scanned zero digits
- ** before this, do not turn off prefixing
- ** (someone else will turn it off if we
- ** have scanned any nonzero digits).
- */
-
- case '0':
- if (base == 0)
- {
- base = 8;
- flags |= PFXOK;
- }
- if (flags & NZDIGITS)
- flags &= ~(SIGNOK|NZDIGITS|NDIGITS);
- else
- flags &= ~(SIGNOK|PFXOK|NDIGITS);
- goto ok;
-
- /* 1 through 7 always legal */
- case '1': case '2': case '3':
- case '4': case '5': case '6': case '7':
- base = basefix[base];
- flags &= ~(SIGNOK | PFXOK | NDIGITS);
- goto ok;
-
- /* digits 8 and 9 ok iff decimal or hex */
- case '8': case '9':
- base = basefix[base];
- if (base <= 8)
- break; /* not legal here */
- flags &= ~(SIGNOK | PFXOK | NDIGITS);
- goto ok;
-
- /* letters ok iff hex */
- case 'A': case 'B': case 'C':
- case 'D': case 'E': case 'F':
- case 'a': case 'b': case 'c':
- case 'd': case 'e': case 'f':
-
- /* no need to fix base here */
- if (base <= 10)
- break; /* not legal here */
- flags &= ~(SIGNOK | PFXOK | NDIGITS);
- goto ok;
-
- /* sign ok only as first character */
- case '+': case '-':
- if (flags & SIGNOK)
- {
- flags &= ~SIGNOK;
- goto ok;
- }
- break;
-
- /* x ok iff flag still set & 2nd char */
- case 'x': case 'X':
- if (flags & PFXOK && p == buf + 1)
- {
- base = 16; /* if %i */
- flags &= ~PFXOK;
- goto ok;
- }
- break;
- }
-
- /*
- ** If we got here, c is not a legal character
- ** for a number. Stop accumulating digits.
- */
-
- break;
- ok:
- /* c is legal: store it and look at the next. */
- *p++ = c;
- if (--fp->f_r > 0)
- fp->f_p++;
- else if (sm_refill(fp, SM_TIME_FOREVER))
- break; /* SM_IO_EOF */
- }
-
- /*
- ** If we had only a sign, it is no good; push
- ** back the sign. If the number ends in `x',
- ** it was [sign] '0' 'x', so push back the x
- ** and treat it as [sign] '0'.
- */
-
- if (flags & NDIGITS)
- {
- if (p > buf)
- (void) sm_io_ungetc(fp, SM_TIME_DEFAULT,
- *(unsigned char *)--p);
- goto match_failure;
- }
- c = ((unsigned char *)p)[-1];
- if (c == 'x' || c == 'X')
- {
- --p;
- (void) sm_io_ungetc(fp, SM_TIME_DEFAULT, c);
- }
- if ((flags & SUPPRESS) == 0)
- {
- ULONGLONG_T res;
-
- *p = 0;
- res = (*ccfn)(buf, (char **)NULL, base);
- if (flags & POINTER)
- *SM_VA_ARG(ap, void **) =
- (void *)(long) res;
- else if (flags & QUAD)
- *SM_VA_ARG(ap, LONGLONG_T *) = res;
- else if (flags & LONG)
- *SM_VA_ARG(ap, long *) = res;
- else if (flags & SHORT)
- *SM_VA_ARG(ap, short *) = res;
- else
- *SM_VA_ARG(ap, int *) = res;
- nassigned++;
- }
- nread += p - buf;
- break;
-
- case CT_FLOAT:
- /* scan a floating point number as if by strtod */
- if (width == 0 || width > sizeof(buf) - 1)
- width = sizeof(buf) - 1;
- flags |= SIGNOK | NDIGITS | DPTOK | EXPOK;
- for (p = buf; width; width--)
- {
- c = *fp->f_p;
-
- /*
- ** This code mimicks the integer conversion
- ** code, but is much simpler.
- */
-
- switch (c)
- {
-
- case '0': case '1': case '2': case '3':
- case '4': case '5': case '6': case '7':
- case '8': case '9':
- flags &= ~(SIGNOK | NDIGITS);
- goto fok;
-
- case '+': case '-':
- if (flags & SIGNOK)
- {
- flags &= ~SIGNOK;
- goto fok;
- }
- break;
- case '.':
- if (flags & DPTOK)
- {
- flags &= ~(SIGNOK | DPTOK);
- goto fok;
- }
- break;
- case 'e': case 'E':
-
- /* no exponent without some digits */
- if ((flags&(NDIGITS|EXPOK)) == EXPOK)
- {
- flags =
- (flags & ~(EXPOK|DPTOK)) |
- SIGNOK | NDIGITS;
- goto fok;
- }
- break;
- }
- break;
- fok:
- *p++ = c;
- if (--fp->f_r > 0)
- fp->f_p++;
- else if (sm_refill(fp, SM_TIME_FOREVER))
- break; /* SM_IO_EOF */
- }
-
- /*
- ** If no digits, might be missing exponent digits
- ** (just give back the exponent) or might be missing
- ** regular digits, but had sign and/or decimal point.
- */
-
- if (flags & NDIGITS)
- {
- if (flags & EXPOK)
- {
- /* no digits at all */
- while (p > buf)
- (void) sm_io_ungetc(fp,
- SM_TIME_DEFAULT,
- *(unsigned char *)--p);
- goto match_failure;
- }
-
- /* just a bad exponent (e and maybe sign) */
- c = *(unsigned char *) --p;
- if (c != 'e' && c != 'E')
- {
- (void) sm_io_ungetc(fp, SM_TIME_DEFAULT,
- c); /* sign */
- c = *(unsigned char *)--p;
- }
- (void) sm_io_ungetc(fp, SM_TIME_DEFAULT, c);
- }
- if ((flags & SUPPRESS) == 0)
- {
- double res;
-
- *p = 0;
- res = strtod(buf, (char **) NULL);
- if (flags & LONG)
- *SM_VA_ARG(ap, double *) = res;
- else
- *SM_VA_ARG(ap, float *) = res;
- nassigned++;
- }
- nread += p - buf;
- break;
- }
- }
-input_failure:
- if (evt != NULL)
- sm_clrevent(evt); /* undo our timeout */
- return nassigned ? nassigned : -1;
-match_failure:
- if (evt != NULL)
- sm_clrevent(evt); /* undo our timeout */
- return nassigned;
-}
-
-/*
-** SM_SCCL -- sequenced character comparison list
-**
-** Fill in the given table from the scanset at the given format
-** (just after `['). Return a pointer to the character past the
-** closing `]'. The table has a 1 wherever characters should be
-** considered part of the scanset.
-**
-** Parameters:
-** tab -- array flagging "active" char's to match (returned)
-** fmt -- character list (within "[]")
-**
-** Results:
-*/
-
-static unsigned char *
-sm_sccl(tab, fmt)
- register char *tab;
- register unsigned char *fmt;
-{
- register int c, n, v;
-
- /* first `clear' the whole table */
- c = *fmt++; /* first char hat => negated scanset */
- if (c == '^')
- {
- v = 1; /* default => accept */
- c = *fmt++; /* get new first char */
- }
- else
- v = 0; /* default => reject */
-
- /* should probably use memset here */
- for (n = 0; n < 256; n++)
- tab[n] = v;
- if (c == 0)
- return fmt - 1; /* format ended before closing ] */
-
- /*
- ** Now set the entries corresponding to the actual scanset
- ** to the opposite of the above.
- **
- ** The first character may be ']' (or '-') without being special;
- ** the last character may be '-'.
- */
-
- v = 1 - v;
- for (;;)
- {
- tab[c] = v; /* take character c */
-doswitch:
- n = *fmt++; /* and examine the next */
- switch (n)
- {
-
- case 0: /* format ended too soon */
- return fmt - 1;
-
- case '-':
- /*
- ** A scanset of the form
- ** [01+-]
- ** is defined as `the digit 0, the digit 1,
- ** the character +, the character -', but
- ** the effect of a scanset such as
- ** [a-zA-Z0-9]
- ** is implementation defined. The V7 Unix
- ** scanf treats `a-z' as `the letters a through
- ** z', but treats `a-a' as `the letter a, the
- ** character -, and the letter a'.
- **
- ** For compatibility, the `-' is not considerd
- ** to define a range if the character following
- ** it is either a close bracket (required by ANSI)
- ** or is not numerically greater than the character
- ** we just stored in the table (c).
- */
-
- n = *fmt;
- if (n == ']' || n < c)
- {
- c = '-';
- break; /* resume the for(;;) */
- }
- fmt++;
- do
- {
- /* fill in the range */
- tab[++c] = v;
- } while (c < n);
-#if 1 /* XXX another disgusting compatibility hack */
-
- /*
- ** Alas, the V7 Unix scanf also treats formats
- ** such as [a-c-e] as `the letters a through e'.
- ** This too is permitted by the standard....
- */
-
- goto doswitch;
-#else
- c = *fmt++;
- if (c == 0)
- return fmt - 1;
- if (c == ']')
- return fmt;
- break;
-#endif
-
- case ']': /* end of scanset */
- return fmt;
-
- default: /* just another character */
- c = n;
- break;
- }
- }
- /* NOTREACHED */
-}
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-04 20:10:31 +0000