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fteqw/plugins/qvm_api.c

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9.3 KiB
C
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/* An implementation of some 'standard' functions */
/* We use this with msvc too, because msvc's implementations of
_snprintf and _vsnprint differ - besides, this way we can make
sure qvms handle all the printf stuff that dlls do*/
#include "plugin.h"
/*
this is a fairly basic implementation.
don't expect it to do much.
You can probably get a better version from somewhere.
*/
int vsnprintf(char *buffer, int maxlen, char *format, va_list vargs)
{
int tokens=0;
char *string;
char tempbuffer[64];
int _int;
float _float;
int i;
int use0s, useprepad;
int precision;
if (!maxlen)
return 0;
maxlen--;
while(*format)
{
switch(*format)
{
case '%':
precision= 0;
useprepad=0;
use0s=0;
retry:
switch(*(++format))
{
case '-':
useprepad=true;
goto retry;
case '0':
if (!precision)
{
use0s=true;
goto retry;
}
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
precision=precision*10+*format-'0';
goto retry;
case '%': /*emit a %*/
if (--maxlen < 0)
{*buffer++='\0';return tokens;}
*buffer++ = *format;
break;
case 's':
string = va_arg(vargs, char *);
if (!string)
string = "(null)";
if (precision)
{
while (*string && precision--)
{
if (--maxlen < 0)
{*buffer++='\0';return tokens;}
*buffer++ = *string++;
}
}
else
{
while (*string)
{
if (--maxlen < 0)
{*buffer++='\0';return tokens;}
*buffer++ = *string++;
}
}
tokens++;
break;
case 'c':
_int = va_arg(vargs, int);
if (--maxlen < 0)
{*buffer++='\0';return tokens;}
*buffer++ = _int;
tokens++;
break;
case 'x':
_int = va_arg(vargs, int);
if (_int < 0)
{
if (--maxlen < 0)
{*buffer++='\0';return tokens;}
*buffer++ = '-';
_int *= -1;
}
i = sizeof(tempbuffer)-2;
tempbuffer[sizeof(tempbuffer)-1] = '\0';
while(_int)
{
tempbuffer[i] = _int%16 + '0';
if (tempbuffer[i] > '9')
tempbuffer[i] = tempbuffer[i] - ':' + 'a';
_int/=16;
i--;
}
string = tempbuffer+i+1;
if (!*string)
{
i=61;
string = tempbuffer+i+1;
string[0] = '0';
string[1] = '\0';
}
precision -= 62-i;
while (precision>0)
{
string--;
if (use0s)
*string = '0';
else
*string = ' ';
precision--;
}
while (*string)
{
if (--maxlen < 0)
{*buffer++='\0';return tokens;}
*buffer++ = *string++;
}
tokens++;
break;
case 'd':
case 'u':
case 'i':
_int = va_arg(vargs, int);
/*
if (useprepad)
{
if (_int >= 1000)
useprepad = 4;
else if (_int >= 100)
useprepad = 3;
else if (_int >= 10)
useprepad = 2;
else if (_int >= 0)
useprepad = 1;
else if (_int <= -1000)
useprepad = 5;
else if (_int <= -100)
useprepad = 4;
else if (_int <= -10)
useprepad = 3;
else
useprepad = 2;
useprepad = precision - useprepad;
Con_Printf("add %i chars\n", useprepad);
while (useprepad>0)
{
if (--maxlen < 0)
{*buffer++='\0';return tokens;}
*buffer++ = ' ';
useprepad--;
}
Con_Printf("%i bytes left\n", maxlen);
}
*/
if (_int < 0)
{
if (--maxlen < 0)
{*buffer++='\0';return tokens;}
*buffer++ = '-';
_int *= -1;
}
i = sizeof(tempbuffer)-2;
tempbuffer[sizeof(tempbuffer)-1] = '\0';
while(_int)
{
tempbuffer[i] = _int%10 + '0';
_int/=10;
i--;
}
string = tempbuffer+i+1;
if (!*string)
{
i=61;
string = tempbuffer+i+1;
string[0] = '0';
string[1] = '\0';
}
precision -= 62-i;
/* while (precision>0)
{
string--;
*string = ' ';
precision--;
}
*/
while(precision>0)
{
if (--maxlen < 0)
{*buffer++='\0';return tokens;}
if (use0s)
*buffer++ = '0';
else
*buffer++ = ' ';
precision--;
}
while (*string)
{
if (--maxlen < 0)
{*buffer++='\0';return tokens;}
*buffer++ = *string++;
}
tokens++;
break;
case 'f':
_float = (float)va_arg(vargs, double);
//integer part.
_int = (int)_float;
if (_int < 0)
{
if (--maxlen < 0)
{*buffer++='\0';return tokens;}
*buffer++ = '-';
_int *= -1;
}
i = sizeof(tempbuffer)-2;
tempbuffer[sizeof(tempbuffer)-1] = '\0';
if (!_int)
{
tempbuffer[i--] = '0';
}
else
{
while(_int)
{
tempbuffer[i--] = _int%10 + '0';
_int/=10;
}
}
string = tempbuffer+i+1;
while (*string)
{
if (--maxlen < 0)
{*buffer++='\0';return tokens;}
*buffer++ = *string++;
}
_int = sizeof(tempbuffer)-2-i;
//floating point part.
_float -= (int)_float;
i = 0;
tempbuffer[i++] = '.';
while(_float - (int)_float)
{
if (i + _int > 7) //remove the excess presision.
break;
_float*=10;
tempbuffer[i++] = (int)_float%10 + '0';
}
if (i == 1) //no actual fractional part
{
tokens++;
break;
}
//concatinate to our string
tempbuffer[i] = '\0';
string = tempbuffer;
while (*string)
{
if (--maxlen < 0)
{*buffer++='\0';return tokens;}
*buffer++ = *string++;
}
tokens++;
break;
default:
string = "ERROR IN FORMAT";
while (*string)
{
if (--maxlen < 0)
{*buffer++='\0';return tokens;}
*buffer++ = *string++;
}
break;
}
break;
default:
if (--maxlen < 0)
{*buffer++='\0';return tokens;}
*buffer++ = *format;
break;
}
format++;
}
{*buffer++='\0';return tokens;}
}
int snprintf(char *buffer, int maxlen, char *format, ...)
{
int p;
va_list argptr;
va_start (argptr, format);
p = vsnprintf (buffer, maxlen, format,argptr);
va_end (argptr);
return p;
}
#ifdef Q3_VM
int strlen(const char *s)
{
int len = 0;
while(*s++)
len++;
return len;
}
int strncmp (const char *s1, const char *s2, int count)
{
while (1)
{
if (!count--)
return 0;
if (*s1 != *s2)
return -1; // strings not equal
if (!*s1)
return 0; // strings are equal
s1++;
s2++;
}
return -1;
}
int strnicmp(const char *s1, const char *s2, int count)
{
char c1, c2;
char ct;
while(*s1)
{
if (!count--)
return 0;
c1 = *s1;
c2 = *s2;
if (c1 != c2)
{
if (c1 >= 'a' && c1 <= 'z') c1 = c1-'a' + 'A';
if (c2 >= 'a' && c2 <= 'z') c2 = c2-'a' + 'A';
if (c1 != c2)
return c1<c2?-1:1;
}
s1++;
s2++;
}
if (*s2) //s2 was longer.
return 1;
return 0;
}
int strcmp(const char *s1, const char *s2)
{
while(*s1)
{
if (*s1 != *s2)
return *s1<*s2?-1:1;
s1++;
s2++;
}
if (*s2) //s2 was longer.
return 1;
return 0;
}
int stricmp(const char *s1, const char *s2)
{
char c1, c2;
char ct;
while(*s1)
{
c1 = *s1;
c2 = *s2;
if (c1 != c2)
{
if (c1 >= 'a' && c1 <= 'z') c1 = c1-'a' + 'A';
if (c2 >= 'a' && c2 <= 'z') c2 = c2-'a' + 'A';
if (c1 != c2)
return c1<c2?-1:1;
}
s1++;
s2++;
}
if (*s2) //s2 was longer.
return 1;
return 0;
}
char *strstr(char *str, const char *sub)
{
char *p;
char *p2;
int l = strlen(sub)-1;
if (l < 0)
return NULL;
while(*str)
{
if (*str == *sub)
{
if (!strncmp (str+1, sub+1, l))
return str;
}
str++;
}
return NULL;
}
char *strchr(char *str, char sub)
{
char *p;
char *p2;
while(*str)
{
if (*str == sub)
return str;
str++;
}
return NULL;
}
int atoi(char *str)
{
int sign;
int num = 0;
int base = 10;
while(*(unsigned char*)str < ' ' && *str)
str++;
if (*str == '-')
{
sign = -1;
str++;
}
else sign = 1;
if (str[0] == '0' && (str[1] == 'x' || str[1] == 'X'))
{
base = 16;
str += 2;
}
while(1)
{
if (*str >= '0' && *str <= '9')
num = num*base + (*str - '0');
else if (*str >= 'a' && *str <= 'a'+base-10)
num = num*base + (*str - 'a')+10;
else if (*str >= 'A' && *str <= 'A'+base-10)
num = num*base + (*str - 'A')+10;
else break; //bad char
str++;
}
return num*sign;
}
float atof(char *str)
{
int sign;
float num = 0.0f;
float unit = 1;
while(*(unsigned char*)str < ' ' && *str)
str++;
if (*str == '-')
{
sign = -1;
str++;
}
else sign = 1;
while(1)
{//each time we find a new digit, increase the value of the previous digets by a factor of ten, and add the new
if (*str >= '0' && *str <= '9')
num = num*10 + (*str - '0');
else break; //bad char
str++;
}
if (*str == '.')
{ //each time we find a new digit, decrease the value of the following digits.
str++;
while(1)
{
if (*str >= '0' && *str <= '9')
{
unit /= 10;
num = num + (*str - '0')*unit;
}
else break; //bad char
str++;
}
}
return num*sign;
}
void strcpy(char *d, const char *s)
{
while (*s)
{
*d++ = *s++;
}
*d='\0';
}
static long randx = 1;
void srand(unsigned int x)
{
randx = x;
}
int getseed(void)
{
return randx;
}
int rand(void)
{
return(((randx = randx*1103515245 + 12345)>>16) & 077777);
}
#endif
#if defined(__MINGW32_VERSION) || defined(__MINGW__) || defined(__MINGW32__) || defined(__CYGWIN__)
#else
void strlcpy(char *d, const char *s, int n)
{
int i;
n--;
if (n < 0)
return; //this could be an error
for (i=0; *s; i++)
{
if (i == n)
break;
*d++ = *s++;
}
*d='\0';
}
#endif
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