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#ifndef lint |
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static const char RCSid[] = "$Id: fgetval.c,v 2.8 2004/03/28 20:33:12 schorsch Exp $"; |
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#endif |
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/* |
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* Read white space separated values from stream |
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* |
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* External symbols declared in rtio.h |
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*/ |
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|
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#include "rtio.h" |
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|
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#include <stdlib.h> |
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#include <ctype.h> |
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|
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int |
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fgetval( /* get specified data word */ |
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FILE *fp, |
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int ty, |
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void *vp /* type depends on ty */ |
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) |
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{ |
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char wrd[64]; |
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char *cp; |
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int c; |
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/* elide comments (# to EOL) */ |
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do { |
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while ((c = getc(fp)) != EOF && isspace(c)) |
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; |
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if (c == '#') |
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while ((c = getc(fp)) != EOF && c != '\n') |
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; |
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} while (c == '\n'); |
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if (c == EOF) |
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return(EOF); |
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/* get word */ |
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cp = wrd; |
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do { |
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*cp++ = c; |
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if (cp - wrd >= sizeof(wrd)) |
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return(0); |
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} while ((c = getc(fp)) != EOF && !isspace(c) && c != '#'); |
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if (c != EOF) |
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ungetc(c, fp); |
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*cp = '\0'; |
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switch (ty) { /* check and convert it */ |
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case 'h': /* short */ |
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if (!isint(wrd)) |
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return(0); |
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*(short *)vp = c = atoi(wrd); |
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if (*(short *)vp != c) |
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return(0); |
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return(1); |
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case 'i': /* integer */ |
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if (!isint(wrd)) |
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return(0); |
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*(int *)vp = atoi(wrd); |
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return(1); |
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case 'l': /* long */ |
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if (!isint(wrd)) |
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return(0); |
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*(long *)vp = atol(wrd); |
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return(1); |
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case 'f': /* float */ |
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if (!isflt(wrd)) |
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return(0); |
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*(float *)vp = atof(wrd); |
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return(1); |
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case 'd': /* double */ |
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if (!isflt(wrd)) |
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return(0); |
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*(double *)vp = atof(wrd); |
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return(1); |
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case 's': /* string */ |
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strcpy(vp, wrd); |
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return(1); |
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default: /* unsupported type */ |
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return(0); |
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} |
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} |
