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*Wed May 21 20:40:11 1997 UTC* (25 years, 4 months ago) by *anton*

Branches: MAIN

CVS tags: v0-4-0, HEAD

Revision

Branches: MAIN

CVS tags: v0-4-0, HEAD

jwilke's changes: Moved many files to other directories renamed many files other changes unknown to me.

/* Copyright (C) 1991, 1992 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. The GNU C 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "ansidecl.h" #include <ctype.h> #include <limits.h> #include <stddef.h> #include <stdlib.h> /* errno.h is needed on SunOS 4.1.2 */ #include <errno.h> #ifndef UNSIGNED #define UNSIGNED 0 #endif /* Convert NPTR to an `unsigned long int' or `long int' in base BASE. If BASE is 0 the base is determined by the presence of a leading zero, indicating octal or a leading "0x" or "0X", indicating hexadecimal. If BASE is < 2 or > 36, it is reset to 10. If ENDPTR is not NULL, a pointer to the character after the last one converted is stored in *ENDPTR. */ #if UNSIGNED unsigned long int #define strtol strtoul #else long int #endif DEFUN(strtol, (nptr, endptr, base), CONST char *nptr AND char **endptr AND int base) { int negative; register unsigned long int cutoff; register unsigned int cutlim; register unsigned long int i; register CONST char *s; register unsigned char c; CONST char *save; int overflow; if (base < 0 || base == 1 || base > 36) base = 10; s = nptr; /* Skip white space. */ while (isspace(*s)) ++s; if (*s == '\0') goto noconv; /* Check for a sign. */ if (*s == '-') { negative = 1; ++s; } else if (*s == '+') { negative = 0; ++s; } else negative = 0; if (base == 16 && s[0] == '0' && toupper(s[1]) == 'X') s += 2; /* If BASE is zero, figure it out ourselves. */ if (base == 0) if (*s == '0') { if (toupper(s[1]) == 'X') { s += 2; base = 16; } else base = 8; } else base = 10; /* Save the pointer so we can check later if anything happened. */ save = s; cutoff = ULONG_MAX / (unsigned long int) base; cutlim = ULONG_MAX % (unsigned long int) base; overflow = 0; i = 0; for (c = *s; c != '\0'; c = *++s) { if (isdigit(c)) c -= '0'; else if (isalpha(c)) c = toupper(c) - 'A' + 10; else break; if (c >= base) break; /* Check for overflow. */ if (i > cutoff || (i == cutoff && c > cutlim)) overflow = 1; else { i *= (unsigned long int) base; i += c; } } /* Check if anything actually happened. */ if (s == save) goto noconv; /* Store in ENDPTR the address of one character past the last character we converted. */ if (endptr != NULL) *endptr = (char *) s; #if !UNSIGNED /* Check for a value that is within the range of `unsigned long int', but outside the range of `long int'. */ if (i > (negative ? - (unsigned long int) LONG_MIN : (unsigned long int) LONG_MAX)) overflow = 1; #endif if (overflow) { errno = ERANGE; #if UNSIGNED return ULONG_MAX; #else return negative ? LONG_MIN : LONG_MAX; #endif } /* Return the result of the appropriate sign. */ return (negative ? - i : i); noconv: /* There was no number to convert. */ if (endptr != NULL) *endptr = (char *) nptr; return 0L; }

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