/* "4cpp" Open C++ Parser v0.1: String
   no warranty implied; use at your own risk
   
NOTES ON USE:
   OPTIONS:
   Set options by defining macros before including this file
   
   FCPP_STRING_IMPLEMENTATION - causes this file to output function implementations
                              - this option is unset after use so that future includes of this file
                                in the same unit do not continue to output implementations
   
   FSTRING_LINK - defines linkage of non-inline functions, defaults to static
   
   include the file "4cpp_clear_config.h" if yo want to undefine all options for some reason
*/

// TOP

#ifndef FCPP_STRING_INC
#define FCPP_STRING_INC

#include <stdint.h>

#ifndef FSTRING_LINK
# define FSTRING_LINK static
#endif

#ifndef FSTRING_INLINE
# define FSTRING_INLINE inline
#endif

#ifndef FRED_STRING_STRUCT
#define FRED_STRING_STRUCT
typedef struct String{
    char *str;
    int32_t size;
    int32_t memory_size;
} String;

typedef struct Offset_String{
    int32_t offset;
    int32_t size;
} Offset_String;
#endif

#ifndef fstr_bool
# define fstr_bool int
#endif

#ifndef literal
# define literal(s) (s), (sizeof(s)-1)
#endif

FSTRING_INLINE fstr_bool char_not_slash(char c) { return (c != '\\' && c != '/'); }
FSTRING_INLINE fstr_bool char_is_slash(char c) { return (c == '\\' || c == '/'); }

FSTRING_INLINE char char_to_upper(char c) { return (c >= 'a' && c <= 'z') ? c + (char)('A' - 'a') : c; }
FSTRING_INLINE char char_to_lower(char c) { return (c >= 'A' && c <= 'Z') ? c - (char)('A' - 'a') : c; }
FSTRING_INLINE int32_t  char_to_int(char c) { return (c - '0'); }
FSTRING_INLINE char int_to_char(int32_t x) { return (char)(x + '0'); }

FSTRING_INLINE fstr_bool char_is_whitespace(char c) { return (c == ' ' || c == '\n' || c == '\r' || c == '\t'); }
FSTRING_INLINE fstr_bool char_is_white_not_r(char c) { return (c == ' ' || c == '\n' || c == '\t'); }
FSTRING_INLINE fstr_bool char_is_lower(char c) { return (c >= 'a' && c <= 'z'); }
FSTRING_INLINE fstr_bool char_is_upper(char c) { return (c >= 'A' && c <= 'Z'); }
FSTRING_INLINE fstr_bool char_is_alpha(char c) { return (c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z' || c == '_'); }
FSTRING_INLINE fstr_bool char_is_alpha_true(char c) { return (c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z'); }
FSTRING_INLINE fstr_bool char_is_numeric(char c) { return (c >= '0' && c <= '9'); }
FSTRING_INLINE fstr_bool char_is_alpha_numeric_true(char c) { return (c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z' || c >= '0' && c <= '9'); }
FSTRING_INLINE fstr_bool char_is_alpha_numeric(char c) { return (c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z' || c >= '0' && c <= '9' || c == '_'); }
FSTRING_INLINE fstr_bool char_is_hex(char c) { return c >= '0' && c <= '9' || c >= 'A' && c <= 'F' || c >= 'a' && c <= 'f'; }
FSTRING_INLINE fstr_bool char_is_basic(char c) { return c >= ' ' && c <= '~'; }

FSTRING_INLINE String string_zero();
FSTRING_INLINE String make_string(void *s, int32_t size, int32_t mem_size);
FSTRING_INLINE String make_string(void *s, int32_t size);

#define make_lit_string(str) (make_string((char*)(str), sizeof(str)-1, sizeof(str)))
#define make_fixed_width_string(str) (make_string((char*)(str), 0, sizeof(str)))

#define expand_str(s) ((s).str), ((s).size)

FSTRING_INLINE  String     make_string_slowly(void *s);
FSTRING_INLINE  char*      make_c_str(String s);

FSTRING_INLINE  String     substr(String str, int32_t start);
FSTRING_INLINE  String     substr(String str, int32_t start, int32_t size);
FSTRING_INLINE  String     substr_slowly(char *s, int32_t start);
FSTRING_INLINE  String     substr(char *s, int32_t start, int32_t size);
FSTRING_INLINE  String     tailstr(String s);


FSTRING_LINK    int32_t        str_size(char *s);

FSTRING_LINK    fstr_bool  match(char *a, char *b);
FSTRING_LINK    fstr_bool  match(String a, char *b);
FSTRING_INLINE  fstr_bool  match(char *a, String b) { return match(b,a); }
FSTRING_LINK    fstr_bool  match(String a, String b);

FSTRING_LINK    fstr_bool  match_part(char *a, char *b, int32_t *len);
FSTRING_LINK    fstr_bool  match_part(String a, char *b, int32_t *len);
FSTRING_INLINE  fstr_bool  match_part(char *a, char *b) { int32_t x; return match_part(a,b,&x); }
FSTRING_INLINE  fstr_bool  match_part(String a, char *b) { int32_t x; return match_part(a,b,&x); }
FSTRING_LINK    fstr_bool  match_part(char *a, String b);
FSTRING_LINK    fstr_bool  match_part(String a, String b);

FSTRING_LINK    fstr_bool  match_insensitive(char *a, char *b);
FSTRING_LINK    fstr_bool  match_insensitive(String a, char *b);
FSTRING_INLINE  fstr_bool  match_insensitive(char *a, String b) { return match_insensitive(b,a); }
FSTRING_LINK    fstr_bool  match_insensitive(String a, String b);

FSTRING_LINK    fstr_bool  match_part_insensitive(char *a, char *b, int32_t *len);
FSTRING_LINK    fstr_bool  match_part_insensitive(String a, char *b, int32_t *len);
FSTRING_INLINE  fstr_bool  match_part_insensitive(char *a, char *b) { int32_t x; return match_part(a,b,&x); }
FSTRING_INLINE  fstr_bool  match_part_insensitive(String a, char *b) { int32_t x; return match_part(a,b,&x); }
FSTRING_LINK    fstr_bool  match_part_insensitive(char *a, String b);
FSTRING_LINK    fstr_bool  match_part_insensitive(String a, String b);

FSTRING_LINK    int32_t        find(char *s, int32_t start, char c);
FSTRING_LINK    int32_t        find(String s, int32_t start, char c);
FSTRING_LINK    int32_t        find(char *s, int32_t start, char *c);
FSTRING_LINK    int32_t        find(String s, int32_t start, char *c);

FSTRING_LINK    int32_t        find_substr(char *s, int32_t start, String seek);
FSTRING_LINK    int32_t        find_substr(String s, int32_t start, String seek);
FSTRING_LINK    int32_t        rfind_substr(String s, int32_t start, String seek);

FSTRING_LINK    int32_t        find_substr_insensitive(char *s, int32_t start, String seek);
FSTRING_LINK    int32_t        find_substr_insensitive(String s, int32_t start, String seek);

FSTRING_LINK    String     skip_whitespace(String s);
FSTRING_LINK    String     chop_whitespace(String s);
FSTRING_LINK    String     skip_chop_whitespace(String s);

FSTRING_INLINE  fstr_bool  has_substr(char *s, String seek) { return (s[find_substr(s, 0, seek)] != 0); }
FSTRING_INLINE  fstr_bool  has_substr(String s, String seek) { return (find_substr(s, 0, seek) < s.size); }

FSTRING_INLINE  fstr_bool  has_substr_insensitive(char *s, String seek) { return (s[find_substr_insensitive(s, 0, seek)] != 0); }
FSTRING_INLINE  fstr_bool  has_substr_insensitive(String s, String seek) { return (find_substr_insensitive(s, 0, seek) < s.size); }

FSTRING_LINK    int32_t    int_to_str_size(int32_t x);
FSTRING_LINK    fstr_bool  int_to_str(String *s_out, int32_t x);
FSTRING_LINK    fstr_bool  append_int_to_str(String *s_out, int32_t x);

FSTRING_LINK    int32_t    u64_to_str_size(uint64_t x);
FSTRING_LINK    fstr_bool  u64_to_str(String *s_out, uint64_t x);
FSTRING_LINK    fstr_bool  append_u64_to_str(String *s_out, uint64_t x);

FSTRING_LINK    int32_t    float_to_str_size(float x);
FSTRING_LINK    fstr_bool  float_to_str(String *s_out, float x);
FSTRING_LINK    fstr_bool  append_float_to_str(String *s_out, float x);

FSTRING_LINK int32_t   str_to_int(char *s);
FSTRING_LINK int32_t   str_to_int(String s);
FSTRING_LINK int32_t   hexchar_to_int(char c);
FSTRING_LINK char      int_to_hexchar(int32_t c);
FSTRING_LINK uint32_t  hexstr_to_int(String s);

FSTRING_LINK fstr_bool color_to_hexstr(uint32_t color, String *s_out);
FSTRING_LINK fstr_bool hexstr_to_color(String s, uint32_t *color);

FSTRING_LINK int32_t    copy_fast_unsafe(char *dest, char *src);
FSTRING_LINK void       copy_fast_unsafe(char *dest, String src);
FSTRING_LINK fstr_bool  copy_checked(String *dest, String src);
FSTRING_LINK fstr_bool  copy_partial(String *dest, char *src);
FSTRING_LINK fstr_bool  copy_partial(String *dest, String src);

FSTRING_INLINE    int32_t    copy(char *dest, char *src) { return copy_fast_unsafe(dest, src); }
FSTRING_INLINE    void       copy(String *dest, String src) { copy_checked(dest, src); }
FSTRING_INLINE    void       copy(String *dest, char *src) { copy_partial(dest, src); }

FSTRING_LINK      fstr_bool  append_checked(String *dest, String src);
FSTRING_LINK      fstr_bool  append_partial(String *dest, char *src);
FSTRING_LINK      fstr_bool  append_partial(String *dest, String src);

FSTRING_LINK      fstr_bool  append(String *dest, char c);
FSTRING_INLINE    fstr_bool  append(String *dest, String src) { return append_partial(dest, src); }
FSTRING_INLINE    fstr_bool  append(String *dest, char *src) { return append_partial(dest, src); }
FSTRING_INLINE    fstr_bool  terminate_with_null(String *str){
    fstr_bool result;
    if (str->size < str->memory_size){
        str->str[str->size] = 0;
        result = 1;
    }
    else{
        str->str[str->size-1] = 0;
        result = 0;
    }
    return result;
}

FSTRING_LINK      fstr_bool  append_padding(String *dest, char c, int32_t target_size);

FSTRING_LINK   int32_t   compare(char *a, char *b);
FSTRING_LINK   int32_t   compare(String a, char *b);
FSTRING_INLINE int32_t   compare(char *a, String b) { return -compare(b,a); }
FSTRING_LINK   int32_t   compare(String a, String b);

FSTRING_LINK   int32_t     reverse_seek_slash(String str);
FSTRING_LINK   int32_t     reverse_seek_slash(String str, int32_t start_pos);
FSTRING_INLINE String      front_of_directory(String dir) { return substr(dir, reverse_seek_slash(dir) + 1); }
FSTRING_INLINE String      path_of_directory(String dir) { return substr(dir, 0, reverse_seek_slash(dir) + 1); }
FSTRING_INLINE fstr_bool   get_front_of_directory(String *dest, String dir) { return append_checked(dest, front_of_directory(dir)); }
FSTRING_INLINE fstr_bool   get_path_of_directory(String *dest, String dir) { return append_checked(dest, path_of_directory(dir)); }
FSTRING_LINK   fstr_bool   set_last_folder(String *dir, char *folder_name, char slash);
FSTRING_LINK   fstr_bool   set_last_folder(String *dir, String folder_name, char slash);
FSTRING_LINK   String      file_extension(String str);
FSTRING_LINK   String      file_extension_slowly(char *str);
FSTRING_LINK   char *      file_extension_c(String str);
FSTRING_LINK   fstr_bool   remove_last_folder(String *str);
FSTRING_LINK   void        replace_char(String str, char replace, char with);
FSTRING_LINK   void        replace_char(char *str, char replace, char with);

// TODO(allen): Add hash-table extension to string sets.
FSTRING_LINK   fstr_bool   string_set_match(String *str_set, int32_t count, String str, int32_t *match_index);


FSTRING_INLINE String string_zero(){
    String str={0};
    return(str);
}

FSTRING_INLINE String make_string(void *str, int32_t size, int32_t mem_size){
    String result;
    result.str = (char*)str;
    result.size = size;
    result.memory_size = mem_size;
    return result;
}

FSTRING_INLINE String
make_string(void *str, int32_t size){
    String result;
    result.str = (char*)str;
    result.size = size;
    result.memory_size = size;
    return result;
}

FSTRING_INLINE String
make_string_slowly(void *str){
    String result;
    result.str = (char*)str;
    result.size = str_size((char*)str);
    result.memory_size = result.size;
    return result;
}

FSTRING_INLINE char*
make_c_str(String str){
    if (str.size < str.memory_size){
        str.str[str.size] = 0;
    }
    else{
        str.str[str.memory_size-1] = 0;
    }
    return (char*)str.str;
}

FSTRING_INLINE String
substr(String str, int32_t start){
    String result;
    result.str = str.str + start;
    result.size = str.size - start;
    return result;
}

FSTRING_INLINE String
substr(String str, int32_t start, int32_t size){
    String result;
    result.str = str.str + start;
    if (start + size > str.size){
        result.size = str.size - start;
    }
    else{
        result.size = size;
    }
    return result;
}

FSTRING_INLINE String
substr_slowly(char *str, int32_t start){
    String result;
    result.str = str + start;
    result.size = str_size(result.str);
    return result;
}

FSTRING_INLINE String
substr(char *str, int32_t start, int32_t size){
    String result;
    result.str = str + start;
    result.size = size;
    for (int32_t i = 0; i < size; ++i){
        if (result.str[i] == 0){
            result.size = i;
            break;
        }
    }
    return result;
}

FSTRING_INLINE String
tailstr(String str){
    String result;
    result.str = str.str + str.size;
    result.memory_size = str.memory_size - str.size;
    result.size = 0;
    return result;
}

#endif // #ifndef FCPP_STRING_INC

#ifdef FCPP_STRING_IMPLEMENTATION

#ifndef FCPP_DID_STRING_IMPLEMENTATION
#define FCPP_DID_STRING_IMPLEMENTATION

FSTRING_LINK int32_t
str_size(char *str){
    int32_t i = 0;
    while (str[i]) ++i;
    return i;
}

FSTRING_LINK fstr_bool
match(char *a, char *b){
    for (int32_t i = 0;; ++i){
        if (a[i] != b[i]){
            return 0;
        }
        if (a[i] == 0){
            return 1;
        }
    }
}

FSTRING_LINK fstr_bool
match(String a, char *b){
    int32_t i = 0;
    for (; i < a.size; ++i){
        if (a.str[i] != b[i]){
            return 0;
        }
    }
    if (b[i] != 0){
        return 0;
    }
    return 1;
}

FSTRING_LINK fstr_bool
match(String a, String b){
    if (a.size != b.size){
        return 0;
    }
    for (int32_t i = 0; i < b.size; ++i){
        if (a.str[i] != b.str[i]){
            return 0;
        }
    }
    return 1;
}

FSTRING_LINK fstr_bool
match_part(char *a, char *b, int32_t *len){
    int32_t i;
    for (i = 0; b[i] != 0; ++i){
        if (a[i] != b[i]){
            return 0;
        }
    }
    *len = i;
    return 1;
}

FSTRING_LINK fstr_bool
match_part(String a, char *b, int32_t *len){
    int32_t i;
    for (i = 0; b[i] != 0; ++i){
        if (a.str[i] != b[i] || i == a.size){
            return 0;
        }
    }
    *len = i;
    return 1;
}

FSTRING_LINK fstr_bool
match_part(char *a, String b){
    for (int32_t i = 0; i != b.size; ++i){
        if (a[i] != b.str[i]){
            return 0;
        }
    }
    return 1;
}

FSTRING_LINK fstr_bool
match_part(String a, String b){
    if (a.size < b.size){
        return 0;
    }
    for (int32_t i = 0; i < b.size; ++i){
        if (a.str[i] != b.str[i]){
            return 0;
        }
    }
    return 1;
}

FSTRING_LINK fstr_bool
match_insensitive(char *a, char *b){
    for (int32_t i = 0;; ++i){
        if (char_to_upper(a[i]) !=
            char_to_upper(b[i])){
            return 0;
        }
        if (a[i] == 0){
            return 1;
        }
    }
}

FSTRING_LINK fstr_bool
match_insensitive(String a, char *b){
    int32_t i = 0;
    for (; i < a.size; ++i){
        if (char_to_upper(a.str[i]) !=
            char_to_upper(b[i])){
            return 0;
        }
    }
    if (b[i] != 0){
        return 0;
    }
    return 1;
}

FSTRING_LINK fstr_bool
match_insensitive(String a, String b){
    if (a.size != b.size){
        return 0;
    }
    for (int32_t i = 0; i < b.size; ++i){
        if (char_to_upper(a.str[i]) !=
            char_to_upper(b.str[i])){
            return 0;
        }
    }
    return 1;
}

FSTRING_LINK fstr_bool
match_part_insensitive(char *a, char *b, int32_t *len){
    int32_t i;
    for (i = 0; b[i] != 0; ++i){
        if (char_to_upper(a[i]) != char_to_upper(b[i])){
            return 0;
        }
    }
    *len = i;
    return 1;
}

FSTRING_LINK fstr_bool
match_part_insensitive(String a, char *b, int32_t *len){
    int32_t i;
    for (i = 0; b[i] != 0; ++i){
        if (char_to_upper(a.str[i]) != char_to_upper(b[i]) ||
            i == a.size){
            return 0;
        }
    }
    *len = i;
    return 1;
}

FSTRING_LINK fstr_bool
match_part_insensitive(char *a, String b){
    for (int32_t i = 0; i != b.size; ++i){
        if (char_to_upper(a[i]) != char_to_upper(b.str[i])){
            return 0;
        }
    }
    return 1;
}

FSTRING_LINK fstr_bool
match_part_insensitive(String a, String b){
    if (a.size < b.size){
        return 0;
    }
    for (int32_t i = 0; i < b.size; ++i){
        if (char_to_upper(a.str[i]) != char_to_upper(b.str[i])){
            return 0;
        }
    }
    return 1;
}

FSTRING_LINK int32_t
find(char *str, int32_t start, char character){
    int32_t i = start;
    while (str[i] != character && str[i] != 0) ++i;
    return i;
}

FSTRING_LINK int32_t
find(String str, int32_t start, char character){
    int32_t i = start;
    while (i < str.size && str.str[i] != character) ++i;
    return i;
}

FSTRING_LINK int32_t
find(char *str, int32_t start, char *characters){
    int32_t i = start, j;
    while (str[i] != 0){
        for (j = 0; characters[j]; ++j){
            if (str[i] == characters[j]){
                return i;
            }
        }
        ++i;
    }
    return i;
}

FSTRING_LINK int32_t
find(String str, int32_t start, char *characters){
    int32_t i = start, j;
    while (i < str.size){
        for (j = 0; characters[j]; ++j){
            if (str.str[i] == characters[j]){
                return i;
            }
        }
        ++i;
    }
    return i;
}

FSTRING_LINK int32_t
find_substr(char *str, int32_t start, String seek){
    int32_t i, j, k;
    fstr_bool hit;
    
    if (seek.size == 0){
        return str_size(str);
    }
    for (i = start; str[i]; ++i){
        if (str[i] == seek.str[0]){
            hit = 1;
            for (j = 1, k = i+1; j < seek.size; ++j, ++k){
                if (str[k] != seek.str[j]){
                    hit = 0;
                    break;
                }
            }
            if (hit){
                return i;
            }
        }
    }
    return i;
}

FSTRING_LINK int32_t
find_substr(String str, int32_t start, String seek){
    int32_t stop_at, i, j, k;
    fstr_bool hit;
    
    if (seek.size == 0){
        return str.size;
    }
    stop_at = str.size - seek.size + 1;
    for (i = start; i < stop_at; ++i){
        if (str.str[i] == seek.str[0]){
            hit = 1;
            for (j = 1, k = i+1; j < seek.size; ++j, ++k){
                if (str.str[k] != seek.str[j]){
                    hit = 0;
                    break;
                }
            }
            if (hit){
                return i;
            }
        }
    }
    return str.size;
}

FSTRING_LINK int32_t
rfind_substr(String str, int32_t start, String seek){
    int32_t i, j, k;
    fstr_bool hit;
    
    if (seek.size == 0){
        return -1;
    }
    if (start + seek.size > str.size){
        start = str.size - seek.size;
    }
    for (i = start; i >= 0; --i){
        if (str.str[i] == seek.str[0]){
            hit = 1;
            for (j = 1, k = i+1; j < seek.size; ++j, ++k){
                if (str.str[k] != seek.str[j]){
                    hit = 0;
                    break;
                }
            }
            if (hit){
                return i;
            }
        }
    }
    return -1;
}

FSTRING_LINK int32_t
find_substr_insensitive(char *str, int32_t start, String seek){
    int32_t i, j, k;
    fstr_bool hit;
    char a_upper, b_upper;
    
    if (seek.size == 0){
        return str_size(str);
    }
    for (i = start; str[i]; ++i){
        if (str[i] == seek.str[0]){
            hit = 1;
            for (j = 1, k = i+1; j < seek.size; ++j, ++k){
                a_upper = char_to_upper(str[k]);
                b_upper = char_to_upper(seek.str[j]);
                if (a_upper != b_upper){
                    hit = 0;
                    break;
                }
            }
            if (hit){
                return i;
            }
        }
    }
    return i;
}

FSTRING_LINK int32_t
find_substr_insensitive(String str, int32_t start, String seek){
    int32_t i, j, k;
    int32_t stop_at;
    fstr_bool hit;
    char a_upper, b_upper;
    
    if (seek.size == 0){
        return str.size;
    }
    stop_at = str.size - seek.size + 1;
    for (i = start; i < stop_at; ++i){
        if (str.str[i] == seek.str[0]){
            hit = 1;
            for (j = 1, k = i+1; j < seek.size; ++j, ++k){
                a_upper = char_to_upper(str.str[k]);
                b_upper = char_to_upper(seek.str[j]);
                if (a_upper != b_upper){
                    hit = 0;
                    break;
                }
            }
            if (hit){
                return i;
            }
        }
    }
    return str.size;
}

FSTRING_LINK String
skip_whitespace(String str){
    String result = {0};
    int i = 0;
    for (; i < str.size && char_is_whitespace(str.str[i]); ++i);
    result = substr(str, i, str.size - i);
    return(result);
}

FSTRING_LINK String
chop_whitespace(String str){
    String result = {0};
    int i = str.size;
    for (; i > 0 && char_is_whitespace(str.str[i-1]); --i);
    result = substr(str, 0, i);
    return(result);
}

FSTRING_LINK String
skip_chop_whitespace(String str){
    str = skip_whitespace(str);
    str = chop_whitespace(str);
    return(str);
}

FSTRING_LINK int32_t
int_to_str_size(int32_t x){
    int32_t size = 1;
    if (x < 0){
        size = 2;
    }
    x /= 10;
    while (x != 0){
        x /= 10;
        ++size;
    }
    return(size);
}

FSTRING_LINK fstr_bool
int_to_str(String *dest, int32_t x){
    fstr_bool result = 1;
    char *str = dest->str;
    int32_t memory_size = dest->memory_size;
    int32_t size, i, j;
    fstr_bool negative;
    
    if (x == 0){
        str[0] = '0';
        dest->size = 1;
    }
    else{
        size = 0;
        negative = 0;
        if (x < 0){
            negative = 1;
            x = -x;
            str[size++] = '-';
        }
        while (x != 0){
            if (size == memory_size){
                result = 0;
                break;
            }
            i = x % 10;
            x /= 10;
            str[size++] = (char)('0' + i);
        }
        if (result){
            // NOTE(allen): Start i = 0 if not negative, start i = 1 if is negative
            // because - should not be flipped if it is negative :)
            for (i = negative, j = size-1; i < j; ++i, --j){
                char temp = str[i];
                str[i] = str[j];
                str[j] = temp;
            }
            dest->size = size;
        }
        else{
            dest->size = 0;
        }
    }
    return(result);
}

FSTRING_LINK fstr_bool
append_int_to_str(String *dest, int32_t x){
    String last_part = tailstr(*dest);
    fstr_bool result = int_to_str(&last_part, x);
    if (result){
        dest->size += last_part.size;
    }
    return(result);
}

FSTRING_LINK int32_t
u64_to_str_size(uint64_t x){
    int32_t size;
    if (x < 0){
        size = 0;
    }
    else{
        size = 1;
        x /= 10;
        while (x != 0){
            x /= 10;
            ++size;
        }
    }
    return(size);
}

FSTRING_LINK fstr_bool
u64_to_str(String *dest, uint64_t x){
    fstr_bool result = 1;
    char *str = dest->str;
    int32_t memory_size = dest->memory_size;
    int32_t size, i, j;
    
    if (x == 0){
        str[0] = '0';
        dest->size = 1;
    }
    else{
        size = 0;
        while (x != 0){
            if (size == memory_size){
                result = 0;
                break;
            }
            i = x % 10;
            x /= 10;
            str[size++] = (char)('0' + i);
        }
        if (result){
            for (i = 0, j = size-1; i < j; ++i, --j){
                char temp = str[i];
                str[i] = str[j];
                str[j] = temp;
            }
            dest->size = size;
        }
        else{
            dest->size = 0;
        }
    }
    return(result);
}

FSTRING_LINK fstr_bool
append_u64_to_str(String *dest, uint64_t x){
    String last_part = tailstr(*dest);
    fstr_bool result = u64_to_str(&last_part, x);
    if (result){
        dest->size += last_part.size;
    }
    return(result);
}

struct Float_To_Str_Variables{
    fstr_bool negative;
    int32_t int_part;
    int32_t dec_part;
};

FSTRING_INLINE Float_To_Str_Variables
get_float_vars(float x){
    Float_To_Str_Variables vars = {0};
    
    if (x < 0){
        vars.negative = true;
        x = -x;
    }
    
    vars.int_part = (int32_t)(x);
    vars.dec_part = (int32_t)((x - vars.int_part) * 1000);
    
    return(vars);
}

FSTRING_LINK int32_t
float_to_str_size(float x){
    Float_To_Str_Variables vars = get_float_vars(x);
    int32_t size =
        vars.negative + int_to_str_size(vars.int_part) + 1 + int_to_str_size(vars.dec_part);
    return(size);
}

FSTRING_LINK fstr_bool
append_float_to_str(String *dest, float x){
    fstr_bool result = 1;
    Float_To_Str_Variables vars = get_float_vars(x);
    
    if (vars.negative){
        append(dest, '-');
    }
    
    append_int_to_str(dest, vars.int_part);
    append(dest, '.');
    append_int_to_str(dest, vars.dec_part);
    
    return(result);
}

FSTRING_LINK fstr_bool
float_to_str(String *dest, float x){
    fstr_bool result = 1;
    dest->size = 0;
    append_float_to_str(dest, x);
    return(result);
}


FSTRING_LINK int32_t
str_to_int(char *str){
    int32_t x = 0;
    for (; *str; ++str){
        if (*str >= '0' || *str <= '9'){
            x *= 10;
            x += *str - '0';
        }
        else{
            x = 0;
            break;
        }
    }
    return(x);
}

FSTRING_LINK int32_t
str_to_int(String str){
    int32_t x, i;
    if (str.size == 0){
        x = 0;
    }
    else{
        x = str.str[0] - '0';
        for (i = 1; i < str.size; ++i){
            x *= 10;
            x += str.str[i] - '0';
        }
    }
    return x;
}

FSTRING_LINK int32_t
hexchar_to_int(char c){
    int32_t x;
    if (c >= '0' && c <= '9'){
        x = c-'0';
    }
    else if (c > 'F'){
        x = c+(10-'a');
    }
    else{
        x = c+(10-'A');
    }
    return x;
}

FSTRING_LINK char
int_to_hexchar(int32_t x){
    return (x<10)?((char)x+'0'):((char)x+'a'-10);
}

FSTRING_LINK unsigned int
hexstr_to_int(String str){
    uint32_t x;
    int32_t i;
    if (str.size == 0){
        x = 0;
    }
    else{
        x = hexchar_to_int(str.str[0]);
        for (i = 1; i < str.size; ++i){
            x *= 0x10;
            x += hexchar_to_int(str.str[i]);
        }
    }
    return x;
}

FSTRING_LINK fstr_bool
color_to_hexstr(uint32_t color, String *s){
    fstr_bool result = 0;
    int32_t i;
    
    if (s->memory_size == 7 || s->memory_size == 8){
        result = 1;
        s->size = 6;
        s->str[6] = 0;
        color = color & 0x00FFFFFF;
        for (i = 5; i >= 0; --i){
            s->str[i] = int_to_hexchar(color & 0xF);
            color >>= 4;
        }
    }
    else if (s->memory_size > 8){
        result = 1;
        s->size = 8;
        s->str[8] = 0;
        for (i = 7; i >= 0; --i){
            s->str[i] = int_to_hexchar(color & 0xF);
            color >>= 4;
        }
    }
    return(result);
}

FSTRING_LINK fstr_bool
hexstr_to_color(String s, uint32_t *out){
    fstr_bool result = 0;
    uint32_t color = 0;
    if (s.size == 6){
        result = 1;
        color = (unsigned int)hexstr_to_int(s);
        color |= (0xFF << 24);
        *out = color;
    }
    else if (s.size == 8){
        result = 1;
        color = (unsigned int)hexstr_to_int(s);
        *out = color;
    }
    return(result);
}

FSTRING_LINK int32_t
copy_fast_unsafe(char *dest, char *src){
    char *start = dest;
    while (*src != 0){
        *dest = *src;
        ++dest;
        ++src;
    }
    return (int)(dest - start);
}

FSTRING_LINK void
copy_fast_unsafe(char *dest, String src){
    int32_t i = 0;
    while (i != src.size){
        dest[i] = src.str[i];
        ++i;
    }
}

FSTRING_LINK fstr_bool
copy_checked(String *dest, String src){
    char *dest_str;
    int32_t i;
    if (dest->memory_size < src.size){
        return 0;
    }
    dest_str = dest->str;
    for (i = 0; i < src.size; ++i){
        dest_str[i] = src.str[i];
    }
    dest->size = src.size;
    return 1;
}

FSTRING_LINK fstr_bool
copy_partial(String *dest, char *src){
    int32_t i = 0;
    int32_t memory_size = dest->memory_size;
    char *dest_str = dest->str;
    while (src[i] != 0){
        if (i >= memory_size){
            return 0;
        }
        dest_str[i] = src[i];
        ++i;
    }
    dest->size = i;
    return 1;
}

FSTRING_LINK fstr_bool
copy_partial(String *dest, String src){
    fstr_bool result;
    int32_t memory_size = dest->memory_size;
    char *dest_str = dest->str;
    if (memory_size < src.size){
        result = 0;
        for (int32_t i = 0; i < memory_size; ++i){
            dest_str[i] = src.str[i];
        }
        dest->size = memory_size;
    }
    else{
        result = 1;
        for (int32_t i = 0; i < src.size; ++i){
            dest_str[i] = src.str[i];
        }
        dest->size = src.size;
    }
    return result;
}

FSTRING_LINK fstr_bool
append_checked(String *dest, String src){
    String end;
    end = tailstr(*dest);
    fstr_bool result = copy_checked(&end, src);
    // NOTE(allen): This depends on end.size still being 0 if
    // the check failed and no coppy occurred.
    dest->size += end.size;
    return result;
}

FSTRING_LINK fstr_bool
append_partial(String *dest, char *src){
    String end = tailstr(*dest);
    fstr_bool result = copy_partial(&end, src);
    dest->size += end.size;
    return result;
}

FSTRING_LINK fstr_bool
append_partial(String *dest, String src){
    String end = tailstr(*dest);
    fstr_bool result = copy_partial(&end, src);
    dest->size += end.size;
    return result;
}

FSTRING_LINK fstr_bool
append(String *dest, char c){
    fstr_bool result = 0;
    if (dest->size < dest->memory_size){
        dest->str[dest->size++] = c;
        result = 1;
    }
    return result;
}

FSTRING_LINK fstr_bool
append_padding(String *dest, char c, int32_t target_size){
    fstr_bool result = 1;
    int32_t offset = target_size - dest->size;
    int32_t r;
    if (offset > 0){
        for (r = 0; r < offset; ++r){
            if (append(dest, c) == 0){
                result = 0;
                break;
            }
        }
    }
    return(result);
}

FSTRING_LINK int32_t
compare(char *a, char *b){
    int32_t i = 0;
    while (a[i] == b[i] && a[i] != 0){
        ++i;
    }
    return (a[i] > b[i]) - (a[i] < b[i]);
}

FSTRING_LINK int32_t
compare(String a, char *b){
    int32_t i = 0;
    while (i < a.size && a.str[i] == b[i]){
        ++i;
    }
    if (i < a.size){
        return (a.str[i] > b[i]) - (a.str[i] < b[i]);
    }
    else{
        if (b[i] == 0){
            return 0;
        }
        else{
            return -1;
        }
    }
}

FSTRING_LINK int32_t
compare(String a, String b){
    int32_t i = 0;
    while (i < a.size && i < b.size && a.str[i] == b.str[i]){
        ++i;
    }
    if (i < a.size && i < b.size){
        return (a.str[i] > b.str[i]) - (a.str[i] < b.str[i]);
    }
    else{
        return (a.size > b.size) - (a.size < b.size);
    }
}

FSTRING_LINK int32_t
reverse_seek_slash(String str, int32_t pos){
    int32_t i = str.size - 1 - pos;
    while (i >= 0 && char_not_slash(str.str[i])){
        --i;
    }
    return i;
}

FSTRING_LINK int32_t
reverse_seek_slash(String str){
    return(reverse_seek_slash(str, 0));
}

FSTRING_LINK fstr_bool
set_last_folder(String *dir, char *folder_name, char slash){
    char str[2];
    fstr_bool result = 0;
    int32_t size = reverse_seek_slash(*dir) + 1;
    dir->size = size;
    str[0] = slash;
    str[1] = 0;
    if (append(dir, folder_name)){
        if (append(dir, str)){
            result = 1;
        }
    }
    if (!result){
        dir->size = size;
    }
    return result;
}

FSTRING_LINK fstr_bool
set_last_folder(String *dir, String folder_name, char slash){
    char str[2];
    fstr_bool result = 0;
    int32_t size = reverse_seek_slash(*dir) + 1;
    dir->size = size;
    str[0] = slash;
    str[1] = 0;
    if (append(dir, folder_name)){
        if (append(dir, str)){
            result = 1;
        }
    }
    if (!result){
        dir->size = size;
    }
    return result;
}

FSTRING_LINK String
file_extension(String str){
    int32_t i;
    for (i = str.size - 1; i >= 0; --i){
        if (str.str[i] == '.') break;
    }
    ++i;
    return make_string(str.str+i, str.size-i);
}

FSTRING_LINK String
file_extension_slowly(char *str){
    int32_t s, i;
    for (s = 0; str[s]; ++s);
    for (i = s - 1; i >= 0; --i){
        if (str[i] == '.') break;
    }
    ++i;
    return make_string(str+i, s-i);
}

FSTRING_LINK char*
file_extension_c(String str){
    int32_t i;
    for (i = str.size - 1; i >= 0; --i){
        if (str.str[i] == '.') break;
    }
    ++i;
    return str.str+i;
}

FSTRING_LINK fstr_bool
remove_last_folder(String *str){
    fstr_bool result = 0;
    int32_t end = reverse_seek_slash(*str, 1);
    if (end >= 0){
        result = 1;
        str->size = end + 1;
    }
    return(result);
}

FSTRING_LINK void
replace_char(String str, char replace, char with){
    char *s = str.str;
    int32_t i;
    
    for (i = 0; i < str.size; ++i, ++s){
        if (*s == replace) *s = with;
    }
}

FSTRING_LINK void
replace_char(char *str, char replace, char with){
    for (; *str; ++str){
        if (*str == replace) *str = with;
    }
}

FSTRING_LINK fstr_bool
string_set_match(String *str_set, int32_t count, String str, int32_t *match_index){
    fstr_bool result = false;
    int32_t i = 0;
    for (; i < count; ++i, ++str_set){
        if (match(*str_set, str)){
            *match_index = i;
            result = true;
            break;
        }
    }
    return(result);
}

// NOTE(allen): experimental section, things below here are
// not promoted to public API level yet.

#ifndef ArrayCount
#define ArrayCount(a) ((sizeof(a))/sizeof(*a))
#endif

struct Absolutes{
    String a[8];
    int32_t count;
};

FSTRING_LINK void
get_absolutes(String name, Absolutes *absolutes, fstr_bool implicit_first, fstr_bool implicit_last){
    int32_t count = 0;
    int32_t max = ArrayCount(absolutes->a) - 1;
    if (implicit_last) --max;
    
    String str;
    str.str = name.str;
    str.size = 0;
    str.memory_size = 0;
    fstr_bool prev_was_wild = 0;
    
    if (implicit_first){
        absolutes->a[count++] = str;
        prev_was_wild = 1;
    }
    
    int32_t i;
    for (i = 0; i < name.size; ++i){
        if (name.str[i] == '*' && count < max){
            if (!prev_was_wild){
                str.memory_size = str.size;
                absolutes->a[count++] = str;
                str.size = 0;
            }
            str.str = name.str + i + 1;
            prev_was_wild = 1;
        }
        else{
            ++str.size;
            prev_was_wild = 0;
        }
    }
    
    str.memory_size = str.size;
    absolutes->a[count++] = str;
    
    if (implicit_last){
        str.size = 0;
        str.memory_size = 0;
        absolutes->a[count++] = str;
    }
    
    absolutes->count = count;
}

FSTRING_LINK fstr_bool
wildcard_match(Absolutes *absolutes, char *x, int32_t case_sensitive){
    fstr_bool r = 1;
    String *a = absolutes->a;
    
    fstr_bool (*match_func)(char*, String);
    fstr_bool (*match_part_func)(char*, String);
    
    if (case_sensitive){
        match_func = match;
        match_part_func = match_part;
    }
    else{
        match_func = match_insensitive;
        match_part_func = match_part_insensitive;
    }
    
    if (absolutes->count == 1){
        r = match_func(x, *a);
    }
    else{
        if (!match_part_func(x, *a)){
            r = 0;
        }
        else{
            String *max = a + absolutes->count - 1;
            x += a->size;
            ++a;
            while (a < max){
                if (*x == 0){
                    r = 0;
                    break;
                }
                if (match_part_func(x, *a)){
                    x += a->size;
                    ++a;
                }
                else{
                    ++x;
                }
            }
            if (r && a->size > 0){
                r = 0;
                while (*x != 0){
                    if (match_part_func(x, *a) && *(x + a->size) == 0){
                        r = 1;
                        break;
                    }
                    else{
                        ++x;
                    }
                }
            }
        }
    }
    return r;
}

FSTRING_LINK fstr_bool
wildcard_match(Absolutes *absolutes, String x, int32_t case_sensitive){
    terminate_with_null(&x);
    return wildcard_match(absolutes, x.str, case_sensitive);
}

#endif // #ifndef FCPP_DID_STRING_IMPLEMENTATION

#undef FCPP_STRING_IMPLEMENTATION
#endif // #ifdef FCPP_STRING_IMPLEMENTATION

// BOTTOM