diff options
Diffstat (limited to 'compat/strtoul.c')
| -rw-r--r-- | compat/strtoul.c | 214 |
1 files changed, 0 insertions, 214 deletions
diff --git a/compat/strtoul.c b/compat/strtoul.c deleted file mode 100644 index af63036..0000000 --- a/compat/strtoul.c +++ /dev/null @@ -1,214 +0,0 @@ -/* - * strtoul.c -- - * - * Source code for the "strtoul" 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. - */ - -#include "tclInt.h" - -/* - * The table below is used to convert from ASCII digits to a numerical - * equivalent. It maps from '0' through 'z' to integers (100 for non-digit - * characters). - */ - -static const char cvtIn[] = { - 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, /* '0' - '9' */ - 100, 100, 100, 100, 100, 100, 100, /* punctuation */ - 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, /* 'A' - 'Z' */ - 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, - 30, 31, 32, 33, 34, 35, - 100, 100, 100, 100, 100, 100, /* punctuation */ - 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, /* 'a' - 'z' */ - 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, - 30, 31, 32, 33, 34, 35}; - -/* - *---------------------------------------------------------------------- - * - * strtoul -- - * - * 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. - * - *---------------------------------------------------------------------- - */ - -unsigned long int -strtoul( - const 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. */ -{ - const char *p; - unsigned long int result = 0; - unsigned digit; - int anyDigits = 0; - int negative=0; - int overflow=0; - - /* - * Skip any leading blanks. - */ - - p = string; - while (isspace(UCHAR(*p))) { - p += 1; - } - if (*p == '-') { - negative = 1; - p += 1; - } else { - if (*p == '+') { - p += 1; - } - } - - /* - * If no base was provided, pick one from the leading characters of the - * string. - */ - - if (base == 0) { - if (*p == '0') { - p += 1; - if ((*p == 'x') || (*p == 'X')) { - p += 1; - base = 16; - } else { - /* - * Must set anyDigits here, otherwise "0" produces a "no - * digits" error. - */ - - anyDigits = 1; - base = 8; - } - } else { - base = 10; - } - } else if (base == 16) { - /* - * Skip a leading "0x" from hex numbers. - */ - - if ((p[0] == '0') && ((p[1] == 'x') || (p[1] == 'X'))) { - p += 2; - } - } - - /* - * Sorry this code is so messy, but speed seems important. Do different - * things for base 8, 10, 16, and other. - */ - - if (base == 8) { - unsigned long maxres = ULONG_MAX >> 3; - - for ( ; ; p += 1) { - digit = *p - '0'; - if (digit > 7) { - break; - } - if (result > maxres) { overflow = 1; } - result = (result << 3); - if (digit > (ULONG_MAX - result)) { overflow = 1; } - result += digit; - anyDigits = 1; - } - } else if (base == 10) { - unsigned long maxres = ULONG_MAX / 10; - - for ( ; ; p += 1) { - digit = *p - '0'; - if (digit > 9) { - break; - } - if (result > maxres) { overflow = 1; } - result *= 10; - if (digit > (ULONG_MAX - result)) { overflow = 1; } - result += digit; - anyDigits = 1; - } - } else if (base == 16) { - unsigned long maxres = ULONG_MAX >> 4; - - for ( ; ; p += 1) { - digit = *p - '0'; - if (digit > ('z' - '0')) { - break; - } - digit = cvtIn[digit]; - if (digit > 15) { - break; - } - if (result > maxres) { overflow = 1; } - result = (result << 4); - if (digit > (ULONG_MAX - result)) { overflow = 1; } - result += digit; - anyDigits = 1; - } - } else if (base >= 2 && base <= 36) { - unsigned long maxres = ULONG_MAX / base; - - for ( ; ; p += 1) { - digit = *p - '0'; - if (digit > ('z' - '0')) { - break; - } - digit = cvtIn[digit]; - if (digit >= ( (unsigned) base )) { - break; - } - if (result > maxres) { overflow = 1; } - result *= base; - if (digit > (ULONG_MAX - result)) { overflow = 1; } - result += digit; - anyDigits = 1; - } - } - - /* - * See if there were any digits at all. - */ - - if (!anyDigits) { - p = string; - } - - if (endPtr != 0) { - /* unsafe, but required by the strtoul prototype */ - *endPtr = (char *) p; - } - - if (overflow) { - errno = ERANGE; - return ULONG_MAX; - } - if (negative) { - return -result; - } - return result; -} |