Add simple sigint handler for repl.

inline evalLambdaArgs() and evalBuiltIns()

src/main.c

@@ -2,25 +2,31 @@
 
 #include "pebblisp.h"
 
+#include <signal.h>
 #include <stdlib.h>
 #include <readline/readline.h>
 #include <readline/history.h>
+#include <unistd.h>
 
-char* getPrompt(struct Environment* env)
+Object getPrompt(struct Environment* env)
 {
     Object prompt = fetchFromEnvironment("prompt", env);
     prompt = cloneObject(prompt);
     if (prompt.type == TYPE_STRING) {
-        char* ret = readline(prompt.string);
-        cleanObject(&prompt);
-        return ret;
+        return prompt;
     }
     Object param = stringFromSlice("", 1);
     Object e = listEvalLambda(&prompt, &param, 2, env);
     cleanObject(&prompt);
     cleanObject(&param);
-    char* ret = readline(e.string);
-    cleanObject(&e);
+    return e;
+}
+
+char* prompt(struct Environment* env)
+{
+    Object p = getPrompt(env);
+    char* ret = readline(p.string);
+    cleanObject(&p);
     return ret;
 }
 
@@ -33,12 +39,21 @@ char* preprocess(char* buf, struct Environment* env)
     return stringObj(&s, &length);
 }
 
+void sigintHandler(unused int signalNumber)
+{
+    Object p = getPrompt(global());
+    write(1, "\n", 1);
+    write(1, p.string, strlen(p.string));
+    cleanObject(&p);
+}
+
 void repl(struct Environment* env)
 {
+    signal(SIGINT, sigintHandler);
     char* buf;
     using_history();
 
-    while ((buf = getPrompt(env)) != NULL) {
+    while ((buf = prompt(env)) != NULL) {
         if (strcmp("q", buf) == 0) {
             free(buf);
             break;
@@ -90,12 +105,11 @@ void loadArgsIntoEnv(int argc, const char* argv[], struct Environment* env)
 
 #ifdef __x86_64__
 
-#include <signal.h>
 #include <ucontext.h>
 
 int nestedSegfault = 0;
 
-void handler(int nSignum, siginfo_t* si, void* vcontext)
+void handler(unused int nSignum, unused siginfo_t* si, void* vcontext)
 {
     if (nestedSegfault) {
         printf("Nested segfault!!!\n");
@@ -122,7 +136,6 @@ void setupSegfaultHandler()
     action.sa_flags = SA_SIGINFO;
     action.sa_sigaction = handler;
     sigaction(SIGSEGV, &action, NULL);
-
 }
 
 #else
@@ -176,6 +189,7 @@ void getSettings(int argc, const char* argv[])
 int main(int argc, const char* argv[])
 {
     setupSegfaultHandler();
+
     getSettings(argc, argv);
 
     struct Environment env = defaultEnv();

src/pebblisp.c

@@ -79,14 +79,6 @@ Object evalIfArgs(const Object* argForms, struct Environment* env)
     return result;
 }
 
-/**
- * Not a typical pl function because it relies almost exclusively on symbols
- */
-Object evalLambdaArgs(const Object* argForms, struct Environment* env)
-{
-    return constructLambda(argForms, argForms ? argForms->forward : NULL, env);
-}
-
 Object mapO(Object* params, int length, struct Environment* env)
 {
     if (length < 2) {
@@ -101,7 +93,6 @@ Object mapO(Object* params, int length, struct Environment* env)
     }
 
     Object outputList = listObject();
-    if (inputList) {
     FOR_POINTER_IN_LIST(inputList) {
         // Create a new list for each element,
         // since lambda evaluation looks for a list
@@ -116,28 +107,11 @@ Object mapO(Object* params, int length, struct Environment* env)
         deleteEnv(&newEnv);
         cleanObject(&tempInput);
     }
-    }
     cleanObject(&lambda);
 
     return outputList;
 }
 
-Object evalBuiltIns(const Object* first, const Object* rest,
-                    struct Environment* env, int* found)
-{
-    *found = 1;
-    if (strcmp(first->string, "if") == 0) {
-        return evalIfArgs(rest, env);
-    } else if (strcmp(first->string, "fn") == 0) {
-        return evalLambdaArgs(rest, env);
-    } else if (strcmp(first->string, "struct") == 0) {
-        return evalStructArgs(rest, rest->forward, env);
-    }
-
-    *found = 0;
-    return *first;
-}
-
 /**
  * Evaluates a paramList whose first element is a function, applying that function
  *
@@ -229,10 +203,14 @@ Object evalList(const Object* obj, struct Environment* env)
 
     Object* first_form = obj->list;
     if (first_form->type == TYPE_SYMBOL) {
-        int found;
-        Object builtIn = evalBuiltIns(first_form, first_form->forward, env, &found);
-        if (found) {
-            return builtIn;
+        if (strcmp(first_form->string, "if") == 0) {
+            return evalIfArgs(first_form->forward, env);
+        } else if (strcmp(first_form->string, "fn") == 0) {
+            Object* params = first_form->forward;
+            Object* body = params ? params->forward : NULL;
+            return constructLambda(params, body, env);
+        } else if (strcmp(first_form->string, "struct") == 0) {
+            return evalStructArgs(first_form->forward, first_form->forward->forward, env);
         }
 
         int i = getStructIndex(first_form->string);
@@ -275,6 +253,19 @@ Object evalList(const Object* obj, struct Environment* env)
     }
 }
 
+#include <stdarg.h>
+Object funcyWithArgs(Object funcy, int count, ...)
+{
+    va_list ptr;
+    va_start(ptr, count);
+    Object args[count];
+    for (int i = 0; i < count; i++) {
+        args[i] = va_arg(ptr, Object);
+    }
+    va_end(ptr);
+
+}
+
 Object eval(const Object* obj, struct Environment* env)
 {
     switch (obj->type) {
@@ -342,10 +333,10 @@ Result parse(struct Slice* slices)
     }
 }
 
-#ifdef SUGAR
-#define sugar(_desc, _code) ;
-#else
+#ifndef NO_SUGAR
 #define sugar(_desc, _code) _code
+#else
+#define sugar(_desc, _code) ;
 #endif
 
 Result readSeq(struct Slice* tokens)

src/pebblisp.h

@@ -77,8 +77,6 @@ Object parseEval(const char* input, struct Environment* env);
 
 Object evalList(const Object* obj, struct Environment* env);
 
-Object evalLambdaArgs(const Object* arg_forms, struct Environment* env);
-
 Object listEvalLambda(Object* lambda, const Object* remaining, int evalLength,
                       struct Environment* env);
 
@@ -110,7 +108,8 @@ struct Slice* getLastOpen();
 
 #endif /* STANDALONE */
 
-fn(mapO, "map",
+tfn(mapO, "map",
+    ({ expect(isFuncy), expect(isListy), returns(isListy) }),
     "Map over a list with a function.",
     "(map (fn (a) (* a a)) (1 2 3))", "( 1 4 9 )",
 );
@@ -124,8 +123,8 @@ tfn(structAccess, "poss",
     ({ expect(isStruct), expect(isStringy), anyType }),
     "Get the value of a struct's field",
     "(struct Post (title body))\n    "
-    "(def p (Post \"TI\" \"BO\"))\n   "
-    "p.title", "TI"
+    "(def p (Post \"This is a title\" \"This is the body\"))\n      "
+    "p.title", "This is a title"
 );
 
 #endif