C言語実装vector(動的配列)

 
   
  
//cvector.h

# ifndef __CVECTOR_H__  
# define __CVECTOR_H__  
  
# include     
# include     
# include     
  
# define MIN_LEN 256  
# define CVEFAILED  -1  
# define CVESUCCESS  0  
# define CVEPUSHBACK 1  
# define CVEPOPBACK  2  
# define CVEINSERT   3  
# define CVERM       4  
# define EXPANED_VAL 1  
# define REDUSED_VAL 2  
  
typedef void *citerator;  
typedef struct _cvector *cvector;  
  
# ifdef __cplusplus  
extern "C" {  
# endif  
  
    cvector   cvector_create   (const size_t size                           );  
    void      cvector_destroy  (const cvector cv                            );  
    size_t    cvector_length   (const cvector cv                            );  
    int       cvector_pushback (const cvector cv, void *memb                );  
    int       cvector_popback  (const cvector cv, void *memb                );  
    size_t    cvector_iter_at  (const cvector cv, citerator iter            );  
    int       cvector_iter_val (const cvector cv, citerator iter, void *memb);  
    citerator cvector_begin    (const cvector cv                            );  
    citerator cvector_end      (const cvector cv                            );  
    citerator cvector_next     (const cvector cv, citerator iter            );  
    int       cvector_val_at   (const cvector cv, size_t index, void *memb  );  
    int       cvector_insert   (const cvector cv, citerator iter, void *memb);  
    int       cvector_insert_at(const cvector cv, size_t index, void *memb  );  
    int       cvector_rm       (const cvector cv, citerator iter            );  
    int       cvector_rm_at    (const cvector cv, size_t index              );  
  
    /* for test  */  
    void      cv_info          (const cvector cv                            );  
    void      cv_print         (const cvector cv                            );  
  
# ifdef __cplusplus  
}  
# endif  
  
#endif
  
  
 
  

 
   
   
   
//cvector.c

#include "cvector.h"

#ifndef __gnu_linux__  
#define __func__ "unknown"  
#define inline __forceinline  
#endif  
  
//# define CWARNING_ITER(cv, iter, file, func, line) \  
//    do {\  
//    if ((cvector_begin(cv) > iter) || (cvector_end(cv) <= iter)) {\  
//    fprintf(stderr, "var(" #iter ") warng out of range, "\  
//    "at file:%s func:%s line:%d!!
", file, func, line);\  
//    return CVEFAILED;\  
//    }\  
//    } while (0)  
  
struct _cvector  
{  
    void *cv_pdata;  
    size_t cv_len, cv_tot_len, cv_size;  
};  
  
cvector cvector_create(const size_t size)  
{  
    cvector cv = (cvector)malloc(sizeof (struct _cvector));  
  
    if (!cv) return NULL;  
  
    cv->cv_pdata = malloc(MIN_LEN * size);  
  
    if (!cv->cv_pdata)  
    {  
        free(cv);  
        return NULL;  
    }  
  
    cv->cv_size = size;  
    cv->cv_tot_len = MIN_LEN;  
    cv->cv_len = 0;  
  
    return cv;  
}    
  
void cvector_destroy(const cvector cv)    
{    
    free(cv->cv_pdata);    
    free(cv);    
    return;    
}    
  
size_t cvector_length(const cvector cv)    
{    
    return cv->cv_len;    
}    
  
int cvector_pushback(const cvector cv, void *memb)    
{    
    if (cv->cv_len >= cv->cv_tot_len)     
    {    
        void *pd_sav = cv->cv_pdata;    
        cv->cv_tot_len <<= EXPANED_VAL;    
        cv->cv_pdata = realloc(cv->cv_pdata, cv->cv_tot_len * cv->cv_size);    
  
        if (!cv->cv_pdata)     
        {    
            cv->cv_pdata = pd_sav;    
            cv->cv_tot_len >>= EXPANED_VAL;    
            return CVEPUSHBACK;    
        }    
    }    
  
    memcpy((char *)cv->cv_pdata + cv->cv_len * cv->cv_size, memb, cv->cv_size);    
    cv->cv_len++;    
  
    return CVESUCCESS;    
}    
  
int cvector_popback(const cvector cv, void *memb)    
{    
    if (cv->cv_len <= 0) return CVEPOPBACK;    
  
    cv->cv_len--;    
    memcpy(memb, (char *)cv->cv_pdata + cv->cv_len * cv->cv_size, cv->cv_size);    
  
    if ((cv->cv_tot_len >= (MIN_LEN << REDUSED_VAL))     
        && (cv->cv_len <= (cv->cv_tot_len >> REDUSED_VAL)))     
    {    
        void *pd_sav = cv->cv_pdata;    
        cv->cv_tot_len >>= EXPANED_VAL;    
        cv->cv_pdata = realloc(cv->cv_pdata, cv->cv_tot_len * cv->cv_size);    
  
        if (!cv->cv_pdata)     
        {    
            cv->cv_tot_len <<= EXPANED_VAL;    
            cv->cv_pdata = pd_sav;    
            return CVEPOPBACK;    
        }    
    }    
  
    return CVESUCCESS;    
}    
  
size_t cvector_iter_at(const cvector cv, citerator iter)    
{    
    //CWARNING_ITER(cv, iter, __FILE__, __func__, __LINE__);    
    return ((char *)iter - (char *)cv->cv_pdata) / cv->cv_size;    
}    
  
int cvector_iter_val(const cvector cv, citerator iter, void *memb)    
{    
    //CWARNING_ITER(cv, iter, __FILE__, __func__, __LINE__);    
    memcpy(memb, iter, cv->cv_size);    
    return 0;    
}    
  
citerator cvector_begin(const cvector cv)    
{    
    return cv->cv_pdata;    
}    
  
citerator cvector_end(const cvector cv)    
{    
    return (char *)cv->cv_pdata + (cv->cv_size * cv->cv_len);    
}    
  
static inline void cvmemove_foreward(const cvector cv, void *from, void *to)    
{    
    size_t size = cv->cv_size;    
    char *p;    
    for (p = (char *)to; p >= (char *)from; p -= size) memcpy(p + size, p, size);    
    return;    
}    
  
static inline void cvmemove_backward(const cvector cv, void *from, void *to)    
{    
    memcpy(from, (char *)from + cv->cv_size, (char *)to - (char *)from);    
    return;    
}    
  
int cvector_insert(const cvector cv, citerator iter, void *memb)    
{    
    //CWARNING_ITER(cv, iter, __FILE__, __func__, __LINE__);    
  
    if (cv->cv_len >= cv->cv_tot_len)     
    {    
        void *pd_sav = cv->cv_pdata;    
        cv->cv_tot_len <<= EXPANED_VAL;    
        cv->cv_pdata = realloc(cv->cv_pdata, cv->cv_tot_len * cv->cv_size);    
  
        if (!cv->cv_pdata)     
        {    
            cv->cv_pdata = pd_sav;    
            cv->cv_tot_len >>= EXPANED_VAL;    
            return CVEINSERT;    
        }    
    }    
  
    cvmemove_foreward(cv, iter, (char *)cv->cv_pdata + cv->cv_len * cv->cv_size);    
    memcpy(iter, memb, cv->cv_size);    
    cv->cv_len++;    
  
    return CVESUCCESS;    
}    
  
int cvector_insert_at(const cvector cv, size_t index, void *memb)    
{    
    citerator iter;    
  
    if (index >= cv->cv_tot_len)     
    {    
        cv->cv_len = index + 1;    
        while (cv->cv_len >= cv->cv_tot_len) cv->cv_tot_len <<= EXPANED_VAL;    
        cv->cv_pdata = realloc(cv->cv_pdata, cv->cv_tot_len * cv->cv_size);    
        iter = (char *)cv->cv_pdata + cv->cv_size * index;    
        memcpy(iter, memb, cv->cv_size);    
    }    
    else     
    {    
        iter = (char *)cv->cv_pdata + cv->cv_size * index;    
        cvector_insert(cv, iter, memb);    
    }    
  
    return 0;    
}    
  
citerator cvector_next(const cvector cv, citerator iter)    
{    
    return (char *)iter + cv->cv_size;    
}    
  
int cvector_val(const cvector cv, citerator iter, void *memb)    
{    
    memcpy(memb, iter, cv->cv_size);    
    return 0;    
}    
  
int cvector_val_at(const cvector cv, size_t index, void *memb)    
{    
    memcpy(memb, (char *)cv->cv_pdata + index * cv->cv_size, cv->cv_size);    
    return 0;    
}    
  
int cvector_rm(const cvector cv, citerator iter)    
{    
    citerator from;    
    citerator end;    
    //CWARNING_ITER(cv, iter, __FILE__, __func__, __LINE__);    
    from = iter;    
    end = cvector_end(cv);    
    memcpy(from, (char *)from + cv->cv_size, (char *)end - (char *)from);    
    cv->cv_len--;    
  
    if ((cv->cv_tot_len >= (MIN_LEN << REDUSED_VAL))    
        && (cv->cv_len <= (cv->cv_tot_len >> REDUSED_VAL)))     
    {    
        void *pd_sav = cv->cv_pdata;    
        cv->cv_tot_len >>= EXPANED_VAL;    
        cv->cv_pdata = realloc(cv->cv_pdata, cv->cv_tot_len * cv->cv_size);    
  
        if (!cv->cv_pdata)     
        {    
            cv->cv_tot_len <<= EXPANED_VAL;    
            cv->cv_pdata = pd_sav;    
            return CVERM;    
        }    
    }    
  
    return CVESUCCESS;    
}    
  
int cvector_rm_at(const cvector cv, size_t index)    
{    
    citerator iter;    
    iter = (char *)cv->cv_pdata + cv->cv_size * index;    
    //CWARNING_ITER(cv, iter, __FILE__, __func__, __LINE__);    
    return cvector_rm(cv, iter);    
}    
  
void cv_info(const cvector cv)    
{    
    printf("

tot :%s : %d
", __func__, cv->cv_tot_len);    
    printf("len :%s : %d
",     __func__, cv->cv_len);    
    printf("size:%s : %d

",   __func__, cv->cv_size);    
    return;    
}    
  
void cv_print(const cvector cv)    
{    
    int num;    
    citerator iter;    
  
    if (cvector_length(cv) == 0)    
        fprintf(stderr, "file:%s func:%s line:%d error, null length cvector!!
", __FILE__, __func__, __LINE__);    
  
    for (iter = cvector_begin(cv);     
        iter != cvector_end(cv);    
        iter = cvector_next(cv, iter))     
    {    
        cvector_iter_val(cv, iter, &num);    
        printf("var:%d at:%d
", num, cvector_iter_at(cv, iter));    
    }    
  
    return;    
} 
  
  
 
   
//main.cpp

typedef struct point
{
	int a;
	int b;
}DPOINT;

int main()
{
	cvector cv = cvector_create(sizeof(POINT)); 
	DPOINT pt;
	for(int i = 0; i < 10; i++)
	{
		pt.a = i;
		pt.b = i + 1;
		cvector_pushback(cv, &pt);
	}
	int a;
	for(int i = 0; i < 10; i++)
	{
		cvector_val_at(cv, i, &pt);
		printf("%d, %d
", pt.a, pt.b);
	}


	cvector_destroy(cv); 
	return 0;
}