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author | rjohnson <rjohnson@noemail.net> | 1998-03-26 14:45:59 (GMT) |
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committer | rjohnson <rjohnson@noemail.net> | 1998-03-26 14:45:59 (GMT) |
commit | 26a76b6c669bbb7629454ffa56a7f3f501a86dae (patch) | |
tree | 6e8c9473978f6dab66c601e911721a7bd9d70b1b /compat/strtol.c | |
parent | f91eedbd6219cd3648cf1085083990df5c0e77dd (diff) | |
download | tcl-26a76b6c669bbb7629454ffa56a7f3f501a86dae.zip tcl-26a76b6c669bbb7629454ffa56a7f3f501a86dae.tar.gz tcl-26a76b6c669bbb7629454ffa56a7f3f501a86dae.tar.bz2 |
Initial revision
FossilOrigin-Name: cacdd0f329872d67973970d74c6978730bc24baa
Diffstat (limited to 'compat/strtol.c')
-rw-r--r-- | compat/strtol.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/compat/strtol.c b/compat/strtol.c new file mode 100644 index 0000000..c781bd6 --- /dev/null +++ b/compat/strtol.c @@ -0,0 +1,83 @@ +/* + * strtol.c -- + * + * Source code for the "strtol" 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. + * + * SCCS: @(#) strtol.c 1.4 96/02/15 12:08:23 + */ + +#include <ctype.h> + + +/* + *---------------------------------------------------------------------- + * + * 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. + * + *---------------------------------------------------------------------- + */ + +long int +strtol(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; + int result; + + /* + * Skip any leading blanks. + */ + + p = string; + while (isspace(*p)) { + p += 1; + } + + /* + * Check for a sign. + */ + + if (*p == '-') { + p += 1; + result = -(strtoul(p, endPtr, base)); + } else { + if (*p == '+') { + p += 1; + } + result = strtoul(p, endPtr, base); + } + if ((result == 0) && (endPtr != 0) && (*endPtr == p)) { + *endPtr = string; + } + return result; +} |