Last change
on this file was 3ae31e9, checked in by Thomas Lopatic <thomas@…>, 7 years ago |
Imported original source code.
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File size:
1.1 KB
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1 | /*
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2 | =============================================================================
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3 | getint.c -- convert a string to a 16 bit integer
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4 | Version 2 -- 1988-09-21 -- 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 "ctype.h"
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9 | #include "stddefs.h"
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10 |
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11 | extern long atol();
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12 |
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13 | /*
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14 | =============================================================================
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15 | get_int(str, ap) -- convert 'str' to a 16 bit integer at 'ap'
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16 | =============================================================================
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17 | */
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18 |
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19 | int
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20 | get_int(str, ap)
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21 | register char *str;
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22 | int *ap;
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23 | {
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24 | register int i, sign, c;
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25 | long arg;
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26 | char *s;
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27 |
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28 | s = str;
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29 |
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30 | while (*str EQ ' ')
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31 | ++str;
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32 |
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33 | while ('\0' NE (c = 0x00FF & *str++)) {
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34 |
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35 | if (c EQ '+') {
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36 |
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37 | if (++sign > 1)
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38 | return(FAILURE);
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39 |
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40 | } else if (c EQ '-') {
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41 |
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42 | if (++sign > 1)
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43 | return(FAILURE);
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44 |
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45 | } else {
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46 |
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47 | if (NOT isascii(c))
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48 | return(FAILURE);
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49 |
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50 | if (NOT isdigit(c))
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51 | return(FAILURE);
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52 | }
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53 | }
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54 |
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55 | if ((arg = atol(s)) > 65535L)
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56 | return(FAILURE);
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57 |
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58 | *ap = arg;
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59 |
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60 | return(SUCCESS);
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61 | }
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