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#include "String.h"
#include "Types.h"
#include <stdio.h>
#include <string.h>
struct StringMeta {
MemoryManager *mm;
usize length;
};
static inline struct StringMeta*
S_metadata(String s) {
return (struct StringMeta*)(s - sizeof(struct StringMeta));
}
static inline void*
S_start(MemoryManager *mm, usize length) {
if (NULL == mm)
return NULL;
struct StringMeta sm = {
.mm = mm,
.length = length,
};
void* start = NULL;
if (R_Ok != mm->alloc(*mm, &start, sizeof(sm) + sm.length + 1) ||
NULL == start)
{
return NULL;
}
memcpy(start, &sm, sizeof(sm));
return start + sizeof(sm);
}
String
S_new(MemoryManager *mm, const char *str) {
if (NULL == str)
return NULL;
usize strlength = strlen(str);
void* start = S_start(mm, strlength);
if (NULL != start)
memcpy(start, str, strlength + 1);
return start;
}
String
S_newlen(MemoryManager *mm, usize length) {
void* start = S_start(mm, length);
if (NULL != start)
memset(start, '\0', length + 1);
return start;
}
static inline usize
S_allocated(String s) {
return sizeof(struct StringMeta) + S_length(s) + 1;
}
String
S_dup(MemoryManager *mm, String s) {
if (NULL == mm || NULL == s)
return NULL;
usize allocated = S_allocated(s);
void* start = NULL;
if (R_Ok != mm->alloc(*mm, &start, allocated) ||
NULL == start)
{
return NULL;
}
memcpy(start, s - sizeof(struct StringMeta), allocated);
return start + sizeof(struct StringMeta);
}
String
S_vconcat(MemoryManager *mm, va_list args) {
if (NULL == mm)
return NULL;
usize length = 0;
va_list temp;
va_copy(temp, args);
for (const char *str = va_arg(temp, const char*); str != NULL; str = va_arg(temp, const char*)) {
length += strlen(str);
}
va_end(temp);
String result = S_newlen(mm, length);
if (NULL == result)
return NULL;
if (0 < length) {
for (const char *str = va_arg(args, const char*); str != NULL; str = va_arg(args, const char*))
strncat(result, str, length);
}
return result;
}
String
S_concat(MemoryManager *mm, ...) {
va_list args;
usize length = 0;
va_start(args, mm);
String result = S_vconcat(mm, args);
va_end(args);
return result;
}
String
S_vprintf(MemoryManager *mm, const char *fmt, va_list args) {
if (NULL == mm)
return NULL;
va_list temp;
va_copy(temp, args);
usize length = vsnprintf(NULL, 0, fmt, temp);
va_end(temp);
String result = S_newlen(mm, length);
if (NULL == result)
return NULL;
vsnprintf(result, length + 1, fmt, args);
return result;
}
String
S_printf(MemoryManager *mm, const char *fmt, ...) {
va_list args;
va_start(args, fmt);
String result = S_vprintf(mm, fmt, args);
va_end(args);
return result;
}
usize
S_length(String s) {
if (NULL == s)
return 0;
return S_metadata(s)->length;
}
static inline Result
S_resize(String *s, usize length) {
if (NULL == s || NULL == *s)
return R_Uninitialized;
struct StringMeta *sm = S_metadata(*s);
void *start = sm;
RETURN_NOTOK(
sm->mm->realloc(*sm->mm, &start, S_allocated(*s) + length));
*s = start + sizeof(*sm);
return R_Ok;
}
Result
S_append(String *s, const char *str) {
if (NULL == str)
return R_Uninitialized;
usize strlength = strlen(str);
RETURN_NOTOK(S_resize(s, strlength));
strcat(*s, str);
S_metadata(*s)->length += strlength;
return R_Ok;
}
Result
S_prepend(String *s, const char *str) {
if (NULL == s)
return R_Uninitialized;
usize strlength = strlen(str);
RETURN_NOTOK(S_resize(s, strlength));
struct StringMeta *sm = S_metadata(*s);
for (usize i = sm->length; i > 0; --i)
*s[i - 1 + strlength] = *s[i - 1];
for (usize i = 0; i < strlength; ++i)
*s[i] = str[i];
sm->length += strlength;
return R_Ok;
}
usize
S_find(String s, char c) {
if (NULL == s)
return -1;
unsigned index = 0;
while (s[index] != '\0' && s[index] != c)
++index;
return index;
}
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