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core: make from-string better

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This commit is contained in:
hellerve 2020-05-12 18:02:30 +02:00
parent aae743fb35
commit c569666a0a
11 changed files with 115 additions and 50 deletions
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50
core/String.carp
View File

@ -199,7 +199,15 @@
(implements str Int.str)
(register format (Fn [&String Int] String))
(implements format Int.format)
(register from-string (λ [&String] Int))
(private from-string-internal)
(hidden from-string-internal)
(register from-string-internal (λ [&String &Int] Bool))
(defn from-string [s]
(let [res 0]
(if (from-string-internal s &res)
(Maybe.Just res)
(Maybe.Nothing))))
(implements from-string Int.from-string)
)
@ -208,7 +216,15 @@
(implements str Byte.str)
(register format (Fn [&String Byte] String))
(implements format Byte.format)
(register from-string (λ [&String] Byte))
(private from-string-internal)
(hidden from-string-internal)
(register from-string-internal (λ [&String &Byte] Bool))
(defn from-string [s]
(let [res 0b]
(if (from-string-internal s &res)
(Maybe.Just res)
(Maybe.Nothing))))
(implements from-string Byte.from-string)
)
@ -217,7 +233,15 @@
(implements str Float.str)
(register format (Fn [&String Float] String))
(implements format Float.format)
(register from-string (λ [&String] Float))
(private from-string-internal)
(hidden from-string-internal)
(register from-string-internal (λ [&String &Float] Bool))
(defn from-string [s]
(let [res 0.0f]
(if (from-string-internal s &res)
(Maybe.Just res)
(Maybe.Nothing))))
(implements from-string Float.from-string)
)
@ -226,7 +250,15 @@
(implements str Long.str)
(register format (Fn [&String Long] String))
(implements format Long.format)
(register from-string (λ [&String] Long))
(private from-string-internal)
(hidden from-string-internal)
(register from-string-internal (λ [&String &Long] Bool))
(defn from-string [s]
(let [res 0l]
(if (from-string-internal s &res)
(Maybe.Just res)
(Maybe.Nothing))))
(implements from-string Long.from-string)
)
@ -235,7 +267,15 @@
(implements str Double.str)
(register format (Fn [&String Double] String))
(implements format Double.format)
(register from-string (λ [&String] Double))
(private from-string-internal)
(hidden from-string-internal)
(register from-string-internal (λ [&String &Double] Bool))
(defn from-string [s]
(let [res 0.0]
(if (from-string-internal s &res)
(Maybe.Just res)
(Maybe.Nothing))))
(implements from-string Double.from-string)
)

4
core/carp_pattern.h
View File

@ -87,7 +87,9 @@ String Pattern_internal_classend(PatternMatchState *ms, String p) {
} while (*p != ']');
return p + 1;
}
default: { return p; }
default: {
return p;
}
}
}

30
core/carp_string.h
View File

@ -228,8 +228,10 @@ String Double_format(const String *s, double x) {
return buffer;
}
double Double_from_MINUS_string(const String *s) {
return strtod(*s, NULL);
bool Double_from_MINUS_string_MINUS_internal(const String *s, double *target) {
char *err;
*target = strtod(*s, &err);
return *err == 0;
}
String Float_str(float x) {
@ -246,8 +248,10 @@ String Float_format(const String *str, float x) {
return buffer;
}
float Float_from_MINUS_string(const String *s) {
return strtof(*s, NULL);
bool Float_from_MINUS_string_MINUS_internal(const String *s, float *target) {
char *err;
*target = strtof(*s, &err);
return *err == 0;
}
String Int_str(int x) {
@ -264,8 +268,10 @@ String Int_format(const String *str, int x) {
return buffer;
}
int Int_from_MINUS_string(const String *s) {
return atoi(*s);
bool Int_from_MINUS_string_MINUS_internal(const String *s, int *target) {
char *err;
*target = (int)strtol(*s, &err, 10);
return *err == 0;
}
String Long_str(Long x) {
@ -282,8 +288,10 @@ String Long_format(const String *str, Long x) {
return buffer;
}
Long Long_from_MINUS_string(const String *s) {
return atol(*s);
bool Long_from_MINUS_string_MINUS_internal(const String *s, Long *target) {
char *err;
*target = strtol(*s, &err, 10);
return *err == 0;
}
String Byte_str(uint8_t x) {
@ -300,8 +308,10 @@ String Byte_format(const String *str, uint8_t x) {
return buffer;
}
uint8_t Byte_from_MINUS_string(const String *s) {
return atoi(*s);
uint8_t Byte_from_MINUS_string_MINUS_internal(const String *s, byte *target) {
char *err;
*target = (uint8_t)strtol(*s, &err, 10);
return *err == 0;
}
int String_index_MINUS_of_MINUS_from(const String *s, char c, int i) {

10
docs/core/Byte.html
View File

@ -543,14 +543,14 @@
</h3>
</a>
<div class="description">
external
defn
</div>
<p class="sig">
(Fn [(Ref String a)] Byte)
(Fn [(Ref String a)] (Maybe Byte))
</p>
<span>
</span>
<pre class="args">
(from-string s)
</pre>
<p class="doc">
</p>

10
docs/core/Double.html
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@ -697,14 +697,14 @@
</h3>
</a>
<div class="description">
external
defn
</div>
<p class="sig">
(Fn [(Ref String a)] Double)
(Fn [(Ref String a)] (Maybe Double))
</p>
<span>
</span>
<pre class="args">
(from-string s)
</pre>
<p class="doc">
</p>

10
docs/core/Float.html
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@ -659,14 +659,14 @@
</h3>
</a>
<div class="description">
external
defn
</div>
<p class="sig">
(Fn [(Ref String a)] Float)
(Fn [(Ref String a)] (Maybe Float))
</p>
<span>
</span>
<pre class="args">
(from-string s)
</pre>
<p class="doc">
</p>

10
docs/core/Int.html
View File

@ -602,14 +602,14 @@
</h3>
</a>
<div class="description">
external
defn
</div>
<p class="sig">
(Fn [(Ref String a)] Int)
(Fn [(Ref String a)] (Maybe Int))
</p>
<span>
</span>
<pre class="args">
(from-string s)
</pre>
<p class="doc">
</p>

10
docs/core/Long.html
View File

@ -562,14 +562,14 @@
</h3>
</a>
<div class="description">
external
defn
</div>
<p class="sig">
(Fn [(Ref String a)] Long)
(Fn [(Ref String a)] (Maybe Long))
</p>
<span>
</span>
<pre class="args">
(from-string s)
</pre>
<p class="doc">
</p>

9
examples/guessing.carp
View File

@ -46,6 +46,9 @@
guessed-num (from-string &user-input)]
(if (= &user-input "q\n")
(exit!)
(cond (< guessed-num answer) (guess-again "low")
(> guessed-num answer) (guess-again "high")
(correct!)))))))
(match guessed-num
(Maybe.Nothing) (print "Invalid input.\nPlease guess again: ")
(Maybe.Just n)
(cond (< n answer) (guess-again "low")
(> n answer) (guess-again "high")
(correct!))))))))

11
test/double_math.carp
View File

@ -103,8 +103,13 @@
"to-bytes works as expected II"
)
(assert-equal test
10.3
(from-string "10.3")
"from-string works as expected"
&(Maybe.Just 10.3)
&(from-string "10.3")
"from-string works as expected I"
)
(assert-equal test
&(Maybe.Nothing)
&(Double.from-string "abcd")
"from-string works as expected II"
)
)

11
test/float_math.carp
View File

@ -109,8 +109,13 @@
"to-bytes works as expected II"
)
(assert-equal test
10.3f
(from-string "10.3")
"from-string works as expected"
&(Maybe.Just 10.3f)
&(from-string "10.3")
"from-string works as expected I"
)
(assert-equal test
&(Maybe.Nothing)
&(Float.from-string "abcd")
"from-string works as expected II"
)
)