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#include "cstr.h"
#include <string.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
int cstrlen(const char * str)
{
return str ? strlen(str) : 0;
}
char * cstrcpy(char * dst, const char * src)
{
if(!dst) return (char*)0;
int len = 0;
if(src){
len = strlen(src);
if(len){
memcpy(dst, src, len);
}
}
dst[len]=0;
return dst + len;
}
/* copy up to maxsize characters from src to dst and return pointer to the next byte after the end */
char * cstrncpy(char * dst, int maxsize, const char * src)
{
if(!dst) return (char*)0;
unsigned int ms = maxsize;
unsigned int len = 0;
if(src && ms > 0){
len = strlen(src);
if(len > ms){
len = ms;
if(len){
memcpy(dst, src, len);
}
}
}
dst[len]=0;
return dst + len;
}
/* copy up to maxsize characters from src to dst and return pointer to the next byte after the end */
char * cvstrncpy(char * dst, int maxsize, const char * ptr, ...)
{
va_list ap;
char * p = dst;
const char * r = ptr;
unsigned int ms = maxsize;
if(ms > 0){
va_start(ap, ptr);
while(r){
unsigned int len = strlen(r);
if(len > ms) len = ms;
memcpy(p, r, len);
p += len;
ms -= len;
r = va_arg(ap, const char*);
}
va_end(ap);
*p = 0;
}
return p;
}
char * cstralloc(int size)
{
return (char*)malloc((size+0xF)&(~0xF));
}
char * cstrdup(const char * str)
{
char * ret = NULL;
if(str){
int len = strlen(str);
if(len){
ret = cstralloc(len);
memcpy(ret, str, len+1);
}
}
return ret;
}
char * cstrndup(const char * str, int max_size)
{
char * ret = NULL;
unsigned int ms = max_size;
if(str){
unsigned int len = strlen(str);
if(len>ms) len=ms;
if(len){
ret = cstralloc(len);
memcpy(ret, str, len);
ret[len] = 0;
}
}
return ret;
}
char * cvstrdup(const char * ptr, ...)
{
va_list ap;
int len = 0;
char *dst, *p;
const char * r;
if(!ptr) return (char*)ptr;
// calculate size
r = ptr;
va_start(ap, ptr);
while(r){
len += strlen(r);
r = va_arg(ap, const char*);
}
va_end(ap);
p = dst = cstralloc(len+1);
if(dst){
r = ptr;
va_start(ap, ptr);
while(r){
len = strlen(r);
memcpy(p, r, len);
p += len;
r = va_arg(ap, const char*);
}
va_end(ap);
*p = 0;
}
return dst;
}
char * cstrnload(char * dst, int max_size, const char * path)
{
FILE * f = fopen(path, "rb");
unsigned long len;
unsigned long ms = max_size;
if (!f) return NULL;
fseek(f, 0, SEEK_END);
len = ftell(f);
fseek(f, 0, SEEK_SET);
if (len > ms) len = ms;
ms = fread(dst, 1, len, f);
fclose(f);
if ((int)ms < 0){
return NULL;
}
dst[len] = 0;
return dst + len;
}
char * cstraload(char ** p, const char * path)
{
char * ret = NULL;
FILE * f = fopen(path, "rb");
int len;
if (f){
fseek(f, 0, SEEK_END);
len = ftell(f);
fseek(f, 0, SEEK_SET);
if (len > 0){
ret = malloc(len);
if (ret){
int ms = fread(ret, 1, len, f);
if (ms < len){
free(ret);
*p = ret = NULL;
}
else{
*p = ret;
ret += len;
}
}
}
fclose(f);
}
return ret;
}
const char * cstrlastpathelement(const char * str)
{
const char * p = strrchr(str, '/');
const char * p2 = strrchr(str, '/');
if(p<p2)p=p2;
else if(p == NULL) p = str;
return p;
}