Last change
on this file since d21fc6f was 3ae31e9, checked in by Thomas Lopatic <thomas@…>, 8 years ago |
Imported original source code.
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File size:
599 bytes
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[3ae31e9] | 1 | /*
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| 2 | =============================================================================
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| 3 | atoi.c -- ascii to integer conversion
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| 4 | Version 4 -- 1987-07-09 -- D.N. Lynx Crowe
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| 5 | =============================================================================
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| 6 | */
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| 7 |
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| 8 | #include "stddefs.h"
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| 9 | #include "ctype.h"
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| 10 |
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| 11 | int
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| 12 | atoi(cp)
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| 13 | register char *cp;
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| 14 | {
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| 15 | register unsigned i;
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| 16 | register short sign;
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| 17 |
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| 18 | sign = 0;
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| 19 |
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| 20 | if ( *cp EQ '-' ) {
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| 21 |
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| 22 | ++cp;
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| 23 | sign = 1;
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| 24 |
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| 25 | } else {
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| 26 |
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| 27 | if (*cp EQ '+')
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| 28 | ++cp;
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| 29 | }
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| 30 |
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| 31 | for (i = 0; isdigit(*cp); )
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| 32 | i = i * 10 + (0x7F & *cp++) - '0';
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| 33 |
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| 34 | return(sign ? -i : i);
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| 35 | }
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| 36 |
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