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collection.h: dynamic memory allocation

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git-svn-id: svn://kolibrios.org@5965 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Kirill Lipatov (Leency) 2015-12-15 16:18:38 +00:00
parent 478ddf2f66
commit 63cc280c5f
3 changed files with 37 additions and 28 deletions
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2
programs/cmm/eolite/include/left_panel.h
View File

@ -78,7 +78,7 @@ void GetSystemDiscs()
dword temp_file_count, tempbuf;
dword devbuf;
disk_list.init(4096);
disk_list.drop();
devbuf = malloc(10000);
ReadDir(19, devbuf, "/");
dev_num = EBX;

11
programs/cmm/examples/collections.c
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@ -1,4 +1,4 @@
#define MEMSIZE 4096*10
#define MEMSIZE 4096*120
#include "../lib/io.h"
#include "../lib/collection.h"
@ -6,12 +6,11 @@
void main()
{
collection s;
int i;
io.run("/sys/develop/board", "");
s.init(4096);
s.add("lorem");
s.add("ipsum");
s.add("1234566");
s.add("Hello");
s.add("World!");
debugln(s.get(0));
debugln(s.get(1));
debugln(s.get(2));
s.drop();
}

52
programs/cmm/lib/collection.h
View File

@ -4,42 +4,52 @@
struct collection
{
int count;
dword element_offset[4096];
int realloc_size, count;
dword data_start;
dword data_cur_pos;
dword data_size;
dword string_data_start;
dword string_data_cur_pos;
void add();
dword element_offset[4090];
int add();
dword get();
void drop();
void init();
void increase_data_size();
};
void collection::init(dword size) {
if (data_size) drop();
data_size = data_size + size;
string_data_cur_pos = string_data_start = malloc(data_size);
count = 0;
void collection::increase_data_size() {
int filled_size;
if (realloc_size<4096) realloc_size = 4096;
if (!data_size) {
data_size = realloc_size;
data_start = malloc(realloc_size);
}
else {
data_size = data_size + realloc_size;
data_start = realloc(data_start, data_size);
}
}
void collection::add(dword in) {
strcpy(string_data_cur_pos, in);
element_offset[count] = string_data_cur_pos;
string_data_cur_pos += strlen(in) + 1;
int collection::add(dword in) {
if (count >= 4090) return 0;
if (data_cur_pos+strlen(in)+2 > data_size) {
increase_data_size();
add(in);
return;
}
strcpy(data_start+data_cur_pos, in);
element_offset[count] = data_cur_pos;
data_cur_pos += strlen(in) + 1;
count++;
return 1;
}
dword collection::get(dword pos) {
return element_offset[pos];
return data_start + element_offset[pos];
}
void collection::drop() {
if (string_data_start) free(string_data_start);
data_size =
string_data_start =
string_data_cur_pos =
count = 0;
if (data_start) free(data_start);
data_size = data_start = data_cur_pos = count = 0;
}
#endif