Use epicsScanFloat/epicsScanDouble rather than sscanf.

This allows proper handling of Nan/Inf on all architectures.

src/libCom/calc/postfix.c

@@ -55,7 +55,7 @@
  *		FLASE		expression element not found
  */
 
-#include	<stdlib.h>
+#include	<epicsStdlib.h>
 #include	<stdio.h>
 #include	<string.h>
 #include	<ctype.h>
@@ -347,7 +347,7 @@ long epicsShareAPI postfix(const char *pin,char *ppostfix,short *perror)
 		*ppostfix++ = '\0';
 
 		ppostfix = pposthold;
-		if ( sscanf(ppostfix,"%lg",&constant) != 1) {
+		if ( epicsScanDouble(ppostfix, &constant) != 1) {
 			*ppostfix = '\0';
 		} else {
 			memcpy(ppostfix,(void *)&constant,8);

src/libCom/env/envSubr.c

@@ -37,7 +37,7 @@
 *-***************************************************************************/
 
 #include <stdio.h>
-#include <stdlib.h>
+#include <epicsStdlib.h>
 #include <string.h>
 #include <limits.h>
 
@@ -198,7 +198,7 @@ double	*pDouble	/* O pointer to place to store value */
 
     ptext = envGetConfigParam(pParam, sizeof text, text);
     if (ptext != NULL) {
-	count = sscanf(text, "%lf", pDouble);
+	count = epicsScanDouble(text, pDouble);
 	if (count == 1) {
 	    return 0;
 	}

src/libCom/misc/epicsScanReal.c

@@ -16,7 +16,7 @@
 #include "epicsStdio.h"
 
 
-epicsShareFunc int epicsShareAPI epicsStrScanDouble(const char *str, double *dest)
+epicsShareFunc int epicsShareAPI epicsScanDouble(const char *str, double *dest)
 {
     char *endp;
     double dtmp;
@@ -28,7 +28,7 @@ epicsShareFunc int epicsShareAPI epicsStrScanDouble(const char *str, double *des
     return 1;
 }
 
-epicsShareFunc int epicsShareAPI epicsStrScanFloat(const char *str, float *dest)
+epicsShareFunc int epicsShareAPI epicsScanFloat(const char *str, float *dest)
 {
     char *endp;
     double dtmp;

src/libCom/misc/epicsStdlib.h

@@ -16,8 +16,8 @@
 extern "C" {
 #endif
 
-epicsShareFunc int epicsShareAPI epicsStrScanDouble(const char *str, double *dest);
-epicsShareFunc int epicsShareAPI epicsStrScanFloat(const char *str, float *dest);
+epicsShareFunc int epicsShareAPI epicsScanDouble(const char *str, double *dest);
+epicsShareFunc int epicsShareAPI epicsScanFloat(const char *str, float *dest);
 
 #include <stdlib.h>
 #include <osdStrtod.h>