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author | dkf <dkf@noemail.net> | 2002-02-15 14:28:46 (GMT) |
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committer | dkf <dkf@noemail.net> | 2002-02-15 14:28:46 (GMT) |
commit | 76f21db3e4ff07d10bc0f4fb6b55feb05b67247a (patch) | |
tree | edaf81ee6d40edeacc9f3e2093ddcb2ba302c620 /compat/strtoll.c | |
parent | 128a1ec632cd69ee32ae5bb3095470002b277211 (diff) | |
download | tcl-76f21db3e4ff07d10bc0f4fb6b55feb05b67247a.zip tcl-76f21db3e4ff07d10bc0f4fb6b55feb05b67247a.tar.gz tcl-76f21db3e4ff07d10bc0f4fb6b55feb05b67247a.tar.bz2 |
TIP#72 implementation. See ChangeLog for details.
This version builds clean on Solaris/SPARC, with GCC and CC, both with and
without threads and both in 32-bit and 64-bit mode.
FossilOrigin-Name: 8d82de1905ada4c5d06f5fb967721e8b681b7c82
Diffstat (limited to 'compat/strtoll.c')
-rw-r--r-- | compat/strtoll.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/compat/strtoll.c b/compat/strtoll.c new file mode 100644 index 0000000..2872006 --- /dev/null +++ b/compat/strtoll.c @@ -0,0 +1,106 @@ +/* + * strtoll.c -- + * + * Source code for the "strtoll" library procedure. + * + * Copyright (c) 1988 The Regents of the University of California. + * Copyright (c) 1994 Sun Microsystems, Inc. + * + * See the file "license.terms" for information on usage and redistribution + * of this file, and for a DISCLAIMER OF ALL WARRANTIES. + * + * RCS: @(#) $Id: strtoll.c,v 1.2 2002/02/15 14:28:47 dkf Exp $ + */ + +#include "tcl.h" +#include "tclPort.h" +#include <ctype.h> + +#define TCL_WIDEINT_MAX (((Tcl_WideUInt)Tcl_LongAsWide(-1))>>1) + + +/* + *---------------------------------------------------------------------- + * + * strtol -- + * + * Convert an ASCII string into an integer. + * + * Results: + * The return value is the integer equivalent of string. If endPtr + * is non-NULL, then *endPtr is filled in with the character + * after the last one that was part of the integer. If string + * doesn't contain a valid integer value, then zero is returned + * and *endPtr is set to string. + * + * Side effects: + * None. + * + *---------------------------------------------------------------------- + */ + +Tcl_WideInt +strtoll(string, endPtr, base) + char *string; /* String of ASCII digits, possibly + * preceded by white space. For bases + * greater than 10, either lower- or + * upper-case digits may be used. + */ + char **endPtr; /* Where to store address of terminating + * character, or NULL. */ + int base; /* Base for conversion. Must be less + * than 37. If 0, then the base is chosen + * from the leading characters of string: + * "0x" means hex, "0" means octal, anything + * else means decimal. + */ +{ + register char *p; + Tcl_WideInt result; + Tcl_WideUInt uwResult; + + /* + * Skip any leading blanks. + */ + + p = string; + while (isspace(*p)) { + p += 1; + } + + /* + * Check for a sign. + */ + + if (*p == '-') { + p += 1; + uwResult = strtoull(p, endPtr, base); + if (errno != ERANGE) { + if (uwResult > TCL_WIDEINT_MAX+1) { + errno = ERANGE; + return Tcl_LongAsWide(-1); + } else if (uwResult > TCL_WIDEINT_MAX) { + return ~((Tcl_WideInt)TCL_WIDEINT_MAX); + } else { + result = -uwResult; + } + } + } else { + if (*p == '+') { + p += 1; + } + uwResult = strtoull(p, endPtr, base); + if (errno != ERANGE) { + if (uwResult > TCL_WIDEINT_MAX) { + errno = ERANGE; + return Tcl_LongAsWide(-1); + } else { + result = uwResult; + } + } + } + if ((result == 0) && (endPtr != 0) && (*endPtr == p)) { + *endPtr = string; + } + return result; +} |