memmove

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
typedef struct Nameval Nameval;
struct Nameval
{
    char *name;
    int value;
};
struct NVtab
{
    int nval;
    int max;
    Nameval *nameval;
}nvtab;
enum{NVINIT=1,NVGROW=2};
int addname(Nameval newname)
{
    Nameval *nvp;
    if(nvtab.nameval==NULL)
    {
        nvtab.nameval=(Nameval*)malloc(NVINIT*sizeof(Nameval));
        if(nvtab.nameval==NULL)
            return -1;
        nvtab.max=NVINIT;
        nvtab.nval=0;
    }
    else if(nvtab.nval>=nvtab.max)
    {
        nvp=(Nameval*)realloc(nvtab.nameval,(NVGROW*nvtab.max)*sizeof(Nameval));
        if(nvp==NULL)return -1;
        nvtab.max*=NVGROW;
        nvtab.nameval=nvp;
    }
    nvtab.nameval[nvtab.nval]=newname;
    return nvtab.nval++;
}
int delname(char *name)
{
    int i;
    for(i=0;i<nvtab.nval;i++)
    {
        if(strcmp(nvtab.nameval[i].name,name)==0)
        {
            memmove(nvtab.nameval+i,nvtab.nameval+i+1,(nvtab.nval-(i+1))*sizeof(Nameval));
            nvtab.nval--;
            return 1;
        }
    }
    return 0;
}
int main(int argc,char *argv[])
{
    Nameval htmlchar1=
    {
        "aelig",0x00c6,
    };
    Nameval htmlchar2=
    {
        "aacute",0x00c1,
    };
    Nameval htmlchar3=
    {
        "acirc",0x00c2,
    };
    addname(htmlchar1);
    printf("%d,%d,%s\n",nvtab.nval,nvtab.max,nvtab.nameval[nvtab.nval-1].name);
    addname(htmlchar2);
    printf("%d,%d,%s\n",nvtab.nval,nvtab.max,nvtab.nameval[nvtab.nval-1].name);
    addname(htmlchar3);
    printf("%d,%d,%s\n",nvtab.nval,nvtab.max,nvtab.nameval[nvtab.nval-1].name);
    if(delname("aeli")==1)
    {
        printf("%d,%d,%s\n",nvtab.nval,nvtab.max,nvtab.nameval[nvtab.nval-1].name);
    }
    else
    {
        printf("found no aeli in the array\n");
    }
if(delname("aelig")==1)
    {
        printf("%d,%d,%s\n",nvtab.nval,nvtab.max,nvtab.nameval[nvtab.nval-1].name);
    }
    else
    {
        printf("found no aeliy in the array\n");
    }

    return 0;
}