diff options
Diffstat (limited to 'src/strtol.c')
| -rw-r--r-- | src/strtol.c | 158 |
1 files changed, 79 insertions, 79 deletions
diff --git a/src/strtol.c b/src/strtol.c index cdf9b92..adbb2ba 100644 --- a/src/strtol.c +++ b/src/strtol.c @@ -2,12 +2,12 @@ Copyright 1991 by Stichting Mathematisch Centrum, Amsterdam, The Netherlands. - All Rights Reserved + All Rights Reserved -Permission to use, copy, modify, and distribute this software and its -documentation for any purpose and without fee is hereby granted, +Permission to use, copy, modify, and distribute this software and its +documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that -both that copyright notice and this permission notice appear in +both that copyright notice and this permission notice appear in supporting documentation, and that the names of Stichting Mathematisch Centrum or CWI not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. @@ -23,100 +23,100 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. ******************************************************************/ /* -** strtol -** This is a general purpose routine for converting -** an ascii string to an integer in an arbitrary base. -** Leading white space is ignored, if 'base' is zero -** it looks for a leading 0, 0x or 0X to tell which -** base. If these are absent it defaults to 10. -** Base must be between 0 and 36. -** If 'ptr' is non-NULL it will contain a pointer to -** the end of the scan. -** Errors due to bad pointers will probably result in -** exceptions - we don't check for them. +** strtol +** This is a general purpose routine for converting +** an ascii string to an integer in an arbitrary base. +** Leading white space is ignored, if 'base' is zero +** it looks for a leading 0, 0x or 0X to tell which +** base. If these are absent it defaults to 10. +** Base must be between 0 and 36. +** If 'ptr' is non-NULL it will contain a pointer to +** the end of the scan. +** Errors due to bad pointers will probably result in +** exceptions - we don't check for them. */ #include "ctype.h" long strtol(str, ptr, base) -register char * str; -char ** ptr; -int base; +register char * str; +char ** ptr; +int base; { - register long result; /* return value of the function */ - register int c; /* current input character */ - int minus; /* true if a leading minus was found */ + register long result; /* return value of the function */ + register int c; /* current input character */ + int minus; /* true if a leading minus was found */ - result = 0; - minus = 0; + result = 0; + minus = 0; /* catch silly bases */ - if (base < 0 || base > 36) - { - if (ptr) - *ptr = str; - return result; - } + if (base < 0 || base > 36) + { + if (ptr) + *ptr = str; + return result; + } /* skip leading white space */ - while (*str && isspace(*str)) - str++; + while (*str && isspace(*str)) + str++; /* check for optional leading minus sign */ - if (*str == '-') - { - minus = 1; - str++; - } + if (*str == '-') + { + minus = 1; + str++; + } /* check for leading 0 or 0x for auto-base or base 16 */ - switch (base) - { - case 0: /* look for leading 0, 0x or 0X */ - if (*str == '0') - { - str++; - if (*str == 'x' || *str == 'X') - { - str++; - base = 16; - } - else - base = 8; - } - else - base = 10; - break; + switch (base) + { + case 0: /* look for leading 0, 0x or 0X */ + if (*str == '0') + { + str++; + if (*str == 'x' || *str == 'X') + { + str++; + base = 16; + } + else + base = 8; + } + else + base = 10; + break; - case 16: /* skip leading 0x or 0X */ - if (*str == '0' && (*(str+1) == 'x' || *(str+1) == 'X')) - str += 2; - break; - } + case 16: /* skip leading 0x or 0X */ + if (*str == '0' && (*(str+1) == 'x' || *(str+1) == 'X')) + str += 2; + break; + } /* do the conversion */ - while (c = *str) - { - if (isdigit(c) && c - '0' < base) - c -= '0'; - else - { - if (isupper(c)) - c = tolower(c); - if (c >= 'a' && c <= 'z') - c -= 'a' - 10; - else /* non-"digit" character */ - break; - if (c >= base) /* non-"digit" character */ - break; - } - result = result * base + c; - str++; - } + while (c = *str) + { + if (isdigit(c) && c - '0' < base) + c -= '0'; + else + { + if (isupper(c)) + c = tolower(c); + if (c >= 'a' && c <= 'z') + c -= 'a' - 10; + else /* non-"digit" character */ + break; + if (c >= base) /* non-"digit" character */ + break; + } + result = result * base + c; + str++; + } /* set pointer to point to the last character scanned */ - if (ptr) - *ptr = str; - return minus ? -result : result; + if (ptr) + *ptr = str; + return minus ? -result : result; } |