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#include "String.h"
#include "GlobalArena.h"
#include "Types.h"
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
struct StringMeta {
BumpArena b;
usize length;
};
static inline struct StringMeta*
S_metadata(String s) {
return (struct StringMeta*)(s - sizeof(struct StringMeta));
}
String
S_new(BumpArena b, const char* str) {
if (NULL == b || NULL == str)
return NULL;
struct StringMeta sm = {
.b = b,
.length = strlen(str),
};
void* start = B_alloc(b, sizeof(sm) + sm.length + 1);
memcpy(start, &sm, sizeof(sm));
start += sizeof(sm);
memcpy(start, str, sm.length + 1);
return start;
}
String
S_newlen(BumpArena b, usize length) {
if (NULL == b)
return NULL;
struct StringMeta sm = {
.b = b,
.length = length,
};
void* start = B_alloc(b, sizeof(sm) + sm.length + 1);
memcpy(start, &sm, sizeof(sm));
start += sizeof(sm);
memset(start, '\0', sm.length + 1);
return start;
}
static inline usize
S_allocated(String s) {
return sizeof(struct StringMeta) + S_length(s) + 1;
}
String
S_dup(BumpArena b, String s) {
if (NULL == b || NULL == s)
return NULL;
usize allocated = S_allocated(s);
void* start = B_alloc(b, allocated);
memcpy(start, s - sizeof(struct StringMeta), allocated);
return NULL;
}
usize
S_length(String s) {
if (NULL == s)
return 0;
return S_metadata(s)->length;
}
Result
S_append(String s, const char* str) {
if (NULL == s)
return R_Uninitialized;
struct StringMeta* sm = S_metadata(s);
usize strlength = strlen(str);
if (sm->length - strlen(s) < strlength) {
if (!B_resizeable(sm->b, s))
return R_Err;
B_resize(sm->b, sizeof(*sm) + (sm->length += strlength) + 1);
}
strcat(s, str);
return R_Ok;
}
Result
S_prepend(String s, const char* str) {
if (NULL == s)
return R_Uninitialized;
struct StringMeta* sm = S_metadata(s);
usize strlength = strlen(str);
if (!B_resizeable(sm->b, s))
return R_Err;
usize orig_len = sm->length;
RETURN_NOTOK(B_resize(sm->b, sizeof(*sm) + (sm->length += strlength) + 1));
for (usize i = orig_len; i > 0; --i)
s[i - 1 + strlength] = s[i - 1];
for (usize i = 0; i < strlength; ++i)
s[i] = str[i];
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;
}
static String
S_vconcat(BumpArena b, va_list args) {
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);
printf("%lu\n", length);
String result = S_newlen(b, length);
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(BumpArena b, ...) {
va_list args;
usize length = 0;
va_start(args, b);
String result = S_vconcat(b, args);
va_end(args);
return result;
}
static String
S_vprintf(BumpArena b, const char* fmt, va_list args) {
va_list temp;
va_copy(temp, args);
usize length = vsnprintf(NULL, 0, fmt, temp);
va_end(temp);
String result = S_newlen(b, length);
vsnprintf(result, length + 1, fmt, args);
return result;
}
String
S_printf(BumpArena b, const char* fmt, ...) {
va_list args;
va_start(args, fmt);
String result = S_vprintf(b, fmt, args);
va_end(args);
return result;
}
String
SG_new(const char* str) {
return S_new(g_arena, str);
}
String
SG_newlen(usize length) {
return S_newlen(g_arena, length);
}
String
SG_dup(String s) {
return S_dup(g_arena, s);
}
String
SG_concat(const char* str, ...) {
if (str == NULL)
return NULL;
va_list args;
va_start(args, str);
String result = S_vconcat(g_arena, args);
va_end(args);
S_prepend(result, str);
return result;
}
String
SG_printf(const char* fmt, ...) {
va_list args;
va_start(args, fmt);
String result = S_vprintf(g_arena, fmt, args);
va_end(args);
return result;
}
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