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/* VMDouble.c - java.lang.VMDouble native functions |
/* VMDouble.c - java.lang.VMDouble native functions |
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Copyright (C) 1998, 1999, 2001, 2003, 2004 Free Software Foundation, Inc. |
Copyright (C) 1998, 1999, 2001, 2003, 2004i, 2005 |
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Free Software Foundation, Inc. |
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This file is part of GNU Classpath. |
This file is part of GNU Classpath. |
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#include <config.h> |
#include <config.h> |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include "mprec.h" |
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#include "fdlibm.h" |
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#include "jcl.h" |
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#include "java_lang_Double.h" |
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#include "java_lang_VMDouble.h" |
#include "java_lang_VMDouble.h" |
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static jclass clsDouble; |
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static jmethodID isNaNID; |
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static jdouble NEGATIVE_INFINITY; |
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static jdouble POSITIVE_INFINITY; |
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static jdouble NaN; |
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/* |
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* Class: java_lang_VMDouble |
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* Method: initIDs |
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* Signature: ()V |
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*/ |
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JNIEXPORT void JNICALL |
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Java_java_lang_VMDouble_initIDs (JNIEnv * env, jclass cls __attribute__ ((__unused__))) |
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{ |
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jfieldID negInfID; |
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jfieldID posInfID; |
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jfieldID nanID; |
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clsDouble = (*env)->FindClass (env, "java/lang/Double"); |
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if (clsDouble == NULL) |
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{ |
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DBG ("unable to get class java.lang.Double\n") return; |
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} |
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isNaNID = (*env)->GetStaticMethodID (env, clsDouble, "isNaN", "(D)Z"); |
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if (isNaNID == NULL) |
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{ |
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DBG ("unable to determine method id of isNaN\n") return; |
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} |
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negInfID = (*env)->GetStaticFieldID (env, clsDouble, "NEGATIVE_INFINITY", "D"); |
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if (negInfID == NULL) |
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{ |
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DBG ("unable to determine field id of NEGATIVE_INFINITY\n") return; |
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} |
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posInfID = (*env)->GetStaticFieldID (env, clsDouble, "POSITIVE_INFINITY", "D"); |
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if (posInfID == NULL) |
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{ |
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DBG ("unable to determine field id of POSITIVE_INFINITY\n") return; |
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} |
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nanID = (*env)->GetStaticFieldID (env, clsDouble, "NaN", "D"); |
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if (posInfID == NULL) |
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{ |
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DBG ("unable to determine field id of NaN\n") return; |
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} |
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POSITIVE_INFINITY = (*env)->GetStaticDoubleField (env, clsDouble, posInfID); |
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NEGATIVE_INFINITY = (*env)->GetStaticDoubleField (env, clsDouble, negInfID); |
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NaN = (*env)->GetStaticDoubleField (env, clsDouble, nanID); |
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#ifdef DEBUG |
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fprintf (stderr, "java.lang.Double.initIDs() POSITIVE_INFINITY = %g\n", |
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POSITIVE_INFINITY); |
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fprintf (stderr, "java.lang.Double.initIDs() NEGATIVE_INFINITY = %g\n", |
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NEGATIVE_INFINITY); |
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fprintf (stderr, "java.lang.Double.initIDs() NaN = %g\n", NaN); |
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#endif |
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} |
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/* |
/* |
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* Class: java_lang_VMDouble |
* Class: java_lang_VMDouble |
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* Method: doubleToLongBits |
* Method: doubleToLongBits |
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val.j = longValue; |
val.j = longValue; |
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return val.d; |
return val.d; |
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} |
} |
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/* |
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* Class: java_lang_VMDouble |
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* Method: toString |
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* Signature: (DZ)Ljava/lang/String; |
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*/ |
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JNIEXPORT jstring JNICALL |
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Java_java_lang_VMDouble_toString |
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(JNIEnv * env, jclass cls __attribute__ ((__unused__)), jdouble value, jboolean isFloat) |
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{ |
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char buffer[50], result[50]; |
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int decpt, sign; |
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char *s, *d; |
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int i; |
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#ifdef DEBUG |
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fprintf (stderr, "java.lang.VMDouble.toString (%g)\n", value); |
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#endif |
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if ((*env)->CallStaticBooleanMethod (env, clsDouble, isNaNID, value)) |
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return (*env)->NewStringUTF (env, "NaN"); |
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if (value == POSITIVE_INFINITY) |
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return (*env)->NewStringUTF (env, "Infinity"); |
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if (value == NEGATIVE_INFINITY) |
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return (*env)->NewStringUTF (env, "-Infinity"); |
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_dtoa (value, 0, 20, &decpt, &sign, NULL, buffer, (int) isFloat); |
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value = fabs (value); |
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s = buffer; |
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d = result; |
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if (sign) |
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*d++ = '-'; |
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if ((value >= 1e-3 && value < 1e7) || (value == 0)) |
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{ |
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if (decpt <= 0) |
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*d++ = '0'; |
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else |
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{ |
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for (i = 0; i < decpt; i++) |
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if (*s) |
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*d++ = *s++; |
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else |
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*d++ = '0'; |
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} |
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*d++ = '.'; |
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if (*s == 0) |
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{ |
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*d++ = '0'; |
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decpt++; |
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} |
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while (decpt++ < 0) |
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*d++ = '0'; |
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while (*s) |
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*d++ = *s++; |
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*d = 0; |
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return (*env)->NewStringUTF (env, result); |
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} |
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*d++ = *s++; |
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decpt--; |
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*d++ = '.'; |
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if (*s == 0) |
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*d++ = '0'; |
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while (*s) |
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*d++ = *s++; |
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*d++ = 'E'; |
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if (decpt < 0) |
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{ |
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*d++ = '-'; |
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decpt = -decpt; |
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} |
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{ |
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char exp[4]; |
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char *e = exp + sizeof exp; |
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*--e = 0; |
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do |
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{ |
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*--e = '0' + decpt % 10; |
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decpt /= 10; |
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} |
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while (decpt > 0); |
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while (*e) |
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*d++ = *e++; |
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} |
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*d = 0; |
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return (*env)->NewStringUTF (env, result); |
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} |
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/* |
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* Class: java_lang_VMDouble |
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* Method: parseDouble |
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* Signature: (Ljava/lang/String;)D |
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*/ |
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JNIEXPORT jdouble JNICALL |
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Java_java_lang_VMDouble_parseDouble |
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(JNIEnv * env, jclass cls __attribute__ ((__unused__)), jstring str) |
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{ |
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jboolean isCopy; |
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const char *buf; |
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char *endptr; |
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jdouble val = 0.0; |
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if (str == NULL) |
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{ |
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JCL_ThrowException (env, "java/lang/NullPointerException", "null"); |
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return val; |
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} |
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buf = (char *) (*env)->GetStringUTFChars (env, str, &isCopy); |
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if (buf == NULL) |
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{ |
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/* OutOfMemoryError already thrown */ |
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} |
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else |
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{ |
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const char *p = buf, *end, *last_non_ws, *temp; |
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int ok = 1; |
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#ifdef DEBUG |
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fprintf (stderr, "java.lang.VMDouble.parseDouble (%s)\n", buf); |
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#endif |
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/* Trim the buffer, similar to String.trim(). First the leading |
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characters. */ |
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while (*p && *p <= ' ') |
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++p; |
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/* Find the last non-whitespace character. This method is safe |
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even with multi-byte UTF-8 characters. */ |
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end = p; |
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last_non_ws = NULL; |
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while (*end) |
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{ |
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if (*end > ' ') |
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last_non_ws = end; |
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++end; |
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} |
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if (last_non_ws == NULL) |
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last_non_ws = p + strlen (p); |
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else |
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{ |
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/* Skip past the last non-whitespace character. */ |
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++last_non_ws; |
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} |
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/* Check for infinity and NaN */ |
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temp = p; |
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if (temp[0] == '+' || temp[0] == '-') |
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temp++; |
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if (strncmp ("Infinity", temp, (size_t) 8) == 0) |
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{ |
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if (p[0] == '-') |
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return NEGATIVE_INFINITY; |
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return POSITIVE_INFINITY; |
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} |
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if (strncmp ("NaN", temp, (size_t) 3) == 0) |
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return NaN; |
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/* Skip a trailing `f' or `d'. */ |
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if (last_non_ws > p |
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&& (last_non_ws[-1] == 'f' |
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|| last_non_ws[-1] == 'F' |
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|| last_non_ws[-1] == 'd' || last_non_ws[-1] == 'D')) |
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--last_non_ws; |
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if (last_non_ws > p) |
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{ |
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struct _Jv_reent reent; |
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memset (&reent, 0, sizeof reent); |
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#ifdef KISSME_LINUX_USER |
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/* FIXME: The libc strtod may not be reliable. */ |
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val = strtod (p, &endptr); |
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#else |
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val = _strtod_r (&reent, p, &endptr); |
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#endif |
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#ifdef DEBUG |
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fprintf (stderr, "java.lang.VMDouble.parseDouble val = %g\n", val); |
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fprintf (stderr, "java.lang.VMDouble.parseDouble %i != %i ???\n", |
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endptr, last_non_ws); |
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#endif |
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if (endptr != last_non_ws) |
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ok = 0; |
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} |
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else |
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ok = 0; |
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if (!ok) |
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{ |
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val = 0.0; |
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JCL_ThrowException (env, |
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"java/lang/NumberFormatException", |
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"unable to parse double"); |
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} |
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(*env)->ReleaseStringUTFChars (env, str, buf); |
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} |
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return val; |
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} |