/[cvs]/stack/stack.c
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revision 1.61 by teddy, Fri Feb 8 05:37:54 2002 UTC revision 1.62 by teddy, Fri Feb 8 06:23:19 2002 UTC
# Line 955  extern void sx_2b(environment *env) { Line 955  extern void sx_2b(environment *env) {
955    a=env->head->item->content.val;    a=env->head->item->content.val;
956    toss(env);    toss(env);
957    if(env->err) return;    if(env->err) return;
958    b=env->head->item->content.val;    if(env->head->item->refcount == 1)
959    toss(env);      env->head->item->content.val += a;
960    if(env->err) return;    else {
961    push_int(&(env->head), a+b);      b=env->head->item->content.val;
962        toss(env);
963        if(env->err) return;
964        push_int(&(env->head), a+b);
965      }
966  }  }
967    
968  /* - */  /* - */
969  extern void sx_2d(environment *env) {  extern void sx_2d(environment *env) {
970    int a;    int a, b;
971    
972    if((env->head)==NULL || env->head->next==NULL) {    if((env->head)==NULL || env->head->next==NULL) {
973      printerr("Too Few Arguments");      printerr("Too Few Arguments");
# Line 980  extern void sx_2d(environment *env) { Line 984  extern void sx_2d(environment *env) {
984    a=env->head->item->content.val;    a=env->head->item->content.val;
985    toss(env);    toss(env);
986    if(env->err) return;    if(env->err) return;
987    env->head->item->content.val -= a;    if(env->head->item->refcount == 1)
988        env->head->item->content.val -= a;
989      else {
990        b=env->head->item->content.val;
991        toss(env);
992        if(env->err) return;
993        push_int(&(env->head), b-a);
994      }
995  }  }
996    
997  /* > */  /* > */
998  extern void sx_3e(environment *env) {  extern void sx_3e(environment *env) {
999    int a;    int a, b;
1000    
1001    if((env->head)==NULL || env->head->next==NULL) {    if((env->head)==NULL || env->head->next==NULL) {
1002      printerr("Too Few Arguments");      printerr("Too Few Arguments");
# Line 1002  extern void sx_3e(environment *env) { Line 1013  extern void sx_3e(environment *env) {
1013    a=env->head->item->content.val;    a=env->head->item->content.val;
1014    toss(env);    toss(env);
1015    if(env->err) return;    if(env->err) return;
1016    env->head->item->content.val = (env->head->item->content.val > a);    if(env->head->item->refcount == 1)
1017        env->head->item->content.val = (env->head->item->content.val > a);
1018      else {
1019        b=env->head->item->content.val;
1020        toss(env);
1021        if(env->err) return;
1022        push_int(&(env->head), b>a);
1023      }
1024  }  }
1025    
1026  /* Return copy of a value */  /* Return copy of a value */
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