#include "misc.h"

#include <stdio.h>

#include <stdarg.h>

#include <string.h>

#include <assert.h>

char strbuf[512];

void fpcrtl_assert(int i)

{

    if(!i){

        assert(0);

    }

}

// EFFECTS: return the nearest integer of the given number

int fpcrtl_round(double number)

{

    return (number >= 0) ? (int)(number + 0.5) : (int)(number - 0.5);

}

void fpcrtl_printf(const char* format, ...)

{

#ifdef FPCRTL_DEBUG

    va_list args;

    va_start (args, format);

    vprintf (format, args);

    va_end (args);

#endif

}

//

//void fpcrtl_check_string(string255 str)

//{

//#ifdef FPCRTL_DEBUG

//    int len = strlen(str.str);

//    if(len != str.len){

//        printf("String %s internal inconsistency error. Length should be %d but actually is %d.\n", str.str, len, str.len);

//    }

//    //assert(len == str.len);

//#endif

//}

string255 fpcrtl_strconcat(string255 str1, string255 str2)

{

    int newlen = str1.len + str2.len;

    if(newlen > 255) newlen = 255;

    memcpy(&(str1.str[str1.len]), str2.str, newlen - str1.len);

    str1.len = newlen;

    return str1;

}

astring fpcrtl_strconcatA(astring str1, astring str2)

{

    int newlen = str1.len + str2.len;

    if(newlen > MAX_ANSISTRING_LENGTH) newlen = MAX_ANSISTRING_LENGTH;

    memcpy(&(str1.s[str1.len + 1]), &str2.s[1], newlen - str1.len);

    str1.len = newlen;

    return str1;

}

string255 fpcrtl_strappend(string255 s, char c)

{

    if(s.len < 255)

    {

        ++s.len;

        s.s[s.len] = c;

    }

    return s;

}

astring fpcrtl_strappendA(astring s, char c)

{

    if(s.len < MAX_ANSISTRING_LENGTH)

    {

        ++s.len;

        s.s[s.len] = c;

    }

    return s;

}

string255 fpcrtl_strprepend(char c, string255 s)

{

    uint8_t newlen = s.len < 255 ? s.len + 1 : 255;

    memmove(s.str + 1, s.str, newlen); // also move '/0'

    s.str[0] = c;

    s.len = newlen;

    return s;

}

string255 fpcrtl_chrconcat(char a, char b)

{

    string255 result;

    result.len = 2;

    result.str[0] = a;

    result.str[1] = b;

    return result;

}

bool fpcrtl_strcompare(string255 str1, string255 str2)

{

    return memcmp(str1.s, str2.s, str1.len + 1) == 0;

}

bool fpcrtl_strcomparec(string255 a, char b)

{

    if(a.len == 1 && a.str[0] == b){

        return true;

    }

    return false;

}

bool fpcrtl_strncompare(string255 a, string255 b)

{

    return !fpcrtl_strcompare(a, b);

}

bool fpcrtl_strncompareA(astring a, astring b)

{

    return (a.len != b.len) || (memcmp(a.str, b.str, a.len) != 0);

}

string255 fpcrtl_pchar2str(const char *s)

{

    string255 result;

    if(!s)

    {

        result.len = 0;

    } else

    {

        int rlen = strlen(s);

        if(rlen > 255){

            rlen = 255;

        }

        result.len = rlen;

        memcpy(result.str, s, rlen);

    }

    return result;

}

string255 fpcrtl_make_string(const char* s) {

    return fpcrtl_pchar2str(s);

}

astring fpcrtl_pchar2astr(const char *s)

{

    astring result;

    if(!s) 

    {

        result.len = 0;

    } else

    {

        int rlen = strlen(s);

        if(rlen > MAX_ANSISTRING_LENGTH){

            rlen = MAX_ANSISTRING_LENGTH;

        }

        result.len = rlen;

        memcpy(result.str, s, rlen);

    }

    return result;

}

astring fpcrtl_str2astr(const string255 s)

{

    astring result;

    result.str255 = s;

    result.len = s.len;

    return result;

}

string255 fpcrtl_astr2str(const astring s)

{

    string255 result;

    result = s.str255;

    result.len = s.len > 255 ? 255 : s.len;

    return result;

}

char __pcharBuf[256];

char* fpcrtl__pchar__vars(const string255 * s)

{

    memcpy(__pcharBuf, &s->s[1], s->len);

    __pcharBuf[s->len] = 0;

    return __pcharBuf;

}

char* fpcrtl__pcharA__vars(astring * s)

{

    if(s->len == MAX_ANSISTRING_LENGTH)

        --s->len;

    s->s[s->len + 1] = 0;

    return &s->s[1];

}

#ifdef EMSCRIPTEN

GLenum glewInit()

{

    return GLEW_OK;

}

void fpcrtl_glShaderSource(GLuint shader, GLsizei count,/* const dropped for pas2c compat */ GLchar **string, const GLint *length) {

    glShaderSource(shader, count, (const char * const *)string, length);

}