X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=simgear%2Fnasal%2Fvector.c;h=df20c1385584e3ddbef2f8080f74eeba0740ab12;hb=a1bb62f43c2f68a5ce4424f4d99f785b6d88bafe;hp=db98b3e45793c51e38c542a1cd9fa0482d4f2019;hpb=1786692406214447db12b9d5af5364582af23d3b;p=simgear.git

diff --git a/simgear/nasal/vector.c b/simgear/nasal/vector.c
index db98b3e4..df20c138 100644
--- a/simgear/nasal/vector.c
+++ b/simgear/nasal/vector.c
@@ -1,71 +1,97 @@
 #include "nasal.h"
 #include "data.h"
 
-static void realloc(struct naVec* v)
+static struct VecRec* newvecrec(struct VecRec* old)
 {
-    int i, newsz = 1 + ((v->size*3)>>1);
-    naRef* na = naAlloc(sizeof(naRef) * newsz);
-    v->alloced = newsz;
-    for(i=0; i<v->size; i++)
-        na[i] = v->array[i];
-    naFree(v->array);
-    v->array = na;
+    int i, oldsz = old ? old->size : 0, newsz = 1 + ((oldsz*3)>>1);
+    struct VecRec* vr = naAlloc(sizeof(struct VecRec) + sizeof(naRef) * newsz);
+    if(oldsz > newsz) oldsz = newsz; // race protection
+    vr->alloced = newsz;
+    vr->size = oldsz;
+    for(i=0; i<oldsz; i++)
+        vr->array[i] = old->array[i];
+    return vr;
 }
 
-void naVec_init(naRef vec)
+static void resize(struct naVec* v)
 {
-    struct naVec* v = vec.ref.ptr.vec;
-    v->array = 0;
-    v->size = 0;
-    v->alloced = 0;
+    struct VecRec* vr = newvecrec(v->rec);
+    naGC_swapfree((void*)&(v->rec), vr);
 }
 
 void naVec_gcclean(struct naVec* v)
 {
-    naFree(v->array);
-    v->size = 0;
-    v->alloced = 0;
-    v->array = 0;
+    naFree(v->rec);
+    v->rec = 0;
 }
 
 naRef naVec_get(naRef v, int i)
 {
-    if(!IS_VEC(v)) return naNil();
-    if(i >= v.ref.ptr.vec->size) return naNil();
-    return v.ref.ptr.vec->array[i];
+    if(IS_VEC(v)) {
+        struct VecRec* r = PTR(v).vec->rec;
+        if(r) {
+            if(i < 0) i += r->size;
+            if(i >= 0 && i < r->size) return r->array[i];
+        }
+    }
+    return naNil();
 }
 
 void naVec_set(naRef vec, int i, naRef o)
 {
-    struct naVec* v = vec.ref.ptr.vec;
-    if(!IS_VEC(vec) || i >= v->size) return;
-    v->array[i] = o;
+    if(IS_VEC(vec)) {
+        struct VecRec* r = PTR(vec).vec->rec;
+        if(r && i >= r->size) return;
+        r->array[i] = o;
+    }
 }
 
 int naVec_size(naRef v)
 {
-    if(!IS_VEC(v)) return 0;
-    return v.ref.ptr.vec->size;
+    if(IS_VEC(v)) {
+        struct VecRec* r = PTR(v).vec->rec;
+        return r ? r->size : 0;
+    }
+    return 0;
 }
 
 int naVec_append(naRef vec, naRef o)
 {
-    struct naVec* v = vec.ref.ptr.vec;
-    if(!IS_VEC(vec)) return 0;
-    if(v->size >= v->alloced)
-        realloc(v);
-    v->array[v->size] = o;
-    return v->size++;
+    if(IS_VEC(vec)) {
+        struct VecRec* r = PTR(vec).vec->rec;
+        while(!r || r->size >= r->alloced) {
+            resize(PTR(vec).vec);
+            r = PTR(vec).vec->rec;
+        }
+        r->array[r->size] = o;
+        return r->size++;
+    }
+    return 0;
+}
+
+void naVec_setsize(naRef vec, int sz)
+{
+    int i;
+    struct VecRec* v = PTR(vec).vec->rec;
+    struct VecRec* nv = naAlloc(sizeof(struct VecRec) + sizeof(naRef) * sz);
+    nv->size = sz;
+    nv->alloced = sz;
+    for(i=0; i<sz; i++)
+        nv->array[i] = (v && i < v->size) ? v->array[i] : naNil();
+    naGC_swapfree((void*)&(PTR(vec).vec->rec), nv);
 }
 
 naRef naVec_removelast(naRef vec)
 {
     naRef o;
-    struct naVec* v = vec.ref.ptr.vec;
-    if(!IS_VEC(vec) || v->size == 0) return naNil();
-    o = v->array[v->size - 1];
-    v->size--;
-    if(v->size < (v->alloced >> 1))
-        realloc(v);
-    return o;
+    if(IS_VEC(vec)) {
+        struct VecRec* v = PTR(vec).vec->rec;
+        if(!v || v->size == 0) return naNil();
+        o = v->array[v->size - 1];
+        v->size--;
+        if(v->size < (v->alloced >> 1))
+            resize(PTR(vec).vec);
+        return o;
+    }
+    return naNil();
 }