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Add functions to dynamically allocate strings

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This commit is contained in:
Abdelrahman Said 2025-02-09 18:46:32 +00:00
parent 86fe867011
commit 023c74d8d9
2 changed files with 90 additions and 2 deletions
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82
src/core/strings/str8/str8.c
View File

@ -1,7 +1,73 @@
#include "str8.h"
#include "aliases.h"
#include "mem_allocator.h"
#include <string.h>
Str8 *wapp_str8_buf_alloc(const Allocator *allocator, u64 capacity) {
Str8 *str = NULL;
if (!allocator) {
goto RETURN_STR8;
}
str = wapp_mem_allocator_alloc(allocator, sizeof(Str8));
if (!str) {
goto RETURN_STR8;
}
c8 *buf = wapp_mem_allocator_alloc(allocator, sizeof(c8) * capacity);
if (!buf) {
wapp_mem_allocator_free(allocator, (void **)&str);
goto RETURN_STR8;
}
str->buf = buf;
str->size = 0;
str->capacity = capacity;
RETURN_STR8:
return str;
}
Str8 *wapp_str8_alloc_cstr(const Allocator *allocator, const char *str) {
Str8 *output = NULL;
if (!allocator || !str) {
goto RETURN_ALLOC_CSTR;
}
u64 length = strlen(str);
output = wapp_str8_buf_alloc(allocator, length * 2);
if (!output) {
goto RETURN_ALLOC_CSTR;
}
output->size = length;
memcpy(output->buf, str, length);
RETURN_ALLOC_CSTR:
return output;
}
Str8 *wapp_str8_alloc_str8(const Allocator *allocator, Str8RO *str) {
Str8 *output = NULL;
if (!allocator || !str) {
goto RETURN_ALLOC_STR8;
}
output = wapp_str8_buf_alloc(allocator, str->capacity);
if (!output) {
goto RETURN_ALLOC_STR8;
}
output->size = str->size;
memcpy(output->buf, str->buf, str->size);
RETURN_ALLOC_STR8:
return output;
}
c8 wapp_str8_get(const Str8 *str, u64 index) {
if (index >= str->size) {
return '\0';
@ -18,6 +84,22 @@ void wapp_str8_set(Str8 *str, u64 index, c8 c) {
str->buf[index] = c;
}
Str8RO wapp_str8_substr(Str8RO *str, u64 start, u64 end) {
if (start >= str->size || start >= end) {
return (Str8RO){0};
}
if (end > str->size) {
end = str->size;
}
return (Str8RO){
.capacity = end - start,
.size = end - start,
.buf = str->buf + start,
};
}
i64 wapp_str8_find(Str8RO *str, Str8RO substr) {
if (substr.size > str->size) {
return -1;

10
src/core/strings/str8/str8.h
View File

@ -2,6 +2,7 @@
#define STR8_H
#include "aliases.h"
#include "mem_allocator.h"
#include <string.h>
#ifdef __cplusplus
@ -32,8 +33,13 @@ typedef const Str8 Str8RO;
.size = sizeof(STRING) - 1, \
.buf = (c8 *)STRING})
c8 wapp_str8_get(Str8RO *str, u64 index);
void wapp_str8_set(Str8 *str, u64 index, c8 c);
Str8 *wapp_str8_buf_alloc(const Allocator *allocator, u64 capacity);
Str8 *wapp_str8_alloc_cstr(const Allocator *allocator, const char *str);
Str8 *wapp_str8_alloc_str8(const Allocator *allocator, Str8RO *str);
c8 wapp_str8_get(Str8RO *str, u64 index);
void wapp_str8_set(Str8 *str, u64 index, c8 c);
Str8RO wapp_str8_substr(Str8RO *str, u64 start, u64 end);
i64 wapp_str8_find(Str8RO *str, Str8RO substr);
i64 wapp_str8_rfind(Str8RO *str, Str8RO substr);