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be careful how to write inf and nan (obs from Paulo Moura)

This commit is contained in:
U-vsc-win7\vsc 2010-05-11 14:44:55 +01:00
parent 8a9f8aa1a6
commit dd2232491a
1 changed files with 23 additions and 8 deletions
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31
C/write.c
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@ -19,6 +19,7 @@ static char SccsId[] = "%W% %G%";
#endif
#include <stdlib.h>
#include <math.h>
#include "Yap.h"
#include "Yatom.h"
#include "YapHeap.h"
@ -128,10 +129,31 @@ wrputf(Float f, wrf writewch) /* writes a float */
{
char s[256], *pt = s, ch;
#if HAVE_ISNAN || defined(__WIN32)
if (isnan(f)) {
wrputs("(nan)", writewch);
lastw = separator;
return;
}
#endif
if (f < 0) {
#if HAVE_ISINF || defined(_WIN32)
if (isinf(f)) {
wrputs("(-inf)", writewch);
lastw = separator;
return;
}
#endif
if (lastw == symbol)
wrputc(' ', writewch);
} else {
#if HAVE_ISINF || defined(_WIN32)
if (isinf(f)) {
wrputs("(+inf)", writewch);
lastw = separator;
return;
}
#endif
if (lastw == alphanum)
wrputc(' ', writewch);
}
@ -140,14 +162,7 @@ wrputf(Float f, wrf writewch) /* writes a float */
sprintf(s, RepAtom(AtomFloatFormat)->StrOfAE, f);
while (*pt == ' ')
pt++;
if (*pt == 'i' || *pt == 'n') /* inf or nan */ {
wrputc('(', writewch);
wrputc('+', writewch);
wrputs(pt, writewch);
wrputc(')', writewch);
} else {
wrputs(pt, writewch);
}
wrputs(pt, writewch);
if (*pt == '-') pt++;
while ((ch = *pt) != '\0') {
if (ch < '0' || ch > '9')