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engine/engine/qclib/test.c

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//This is basically a sample program.
//It deomnstrates the code required to get qclib up and running.
//This code does not demonstrate entities, however.
//It does demonstrate the built in qc compiler, and does demonstrate a globals-only progs interface.
//It also demonstrates basic builtin(s).
#include "progtype.h"
#include "progslib.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
enum{false,true};
//builtins and builtin management.
void PF_puts (pubprogfuncs_t *prinst, struct globalvars_s *gvars)
{
char *s;
s = prinst->VarString(prinst, 0);
printf("%s", s);
}
void PF_putv (pubprogfuncs_t *prinst, struct globalvars_s *pr_globals)
{
printf("%f %f %f\n", G_FLOAT(OFS_PARM0+0), G_FLOAT(OFS_PARM0+1), G_FLOAT(OFS_PARM0+2));
}
void PF_putf (pubprogfuncs_t *prinst, struct globalvars_s *pr_globals)
{
printf("%f\n", G_FLOAT(OFS_PARM0));
}
#ifdef _WIN32
#define Q_snprintfz _snprintf
#define Q_vsnprintf _vsnprintf
#else
#define Q_snprintfz snprintf
#define Q_vsnprintf vsnprintf
#endif
char *va(char *format, ...)
{
va_list argptr;
static char string[1024];
va_start (argptr, format);
Q_vsnprintf (string, sizeof(string), format,argptr);
va_end (argptr);
return string;
}
void QCBUILTIN PF_sprintf_internal (pubprogfuncs_t *prinst, struct globalvars_s *pr_globals, const char *s, int firstarg, char *outbuf, int outbuflen)
{
const char *s0;
char *o = outbuf, *end = outbuf + outbuflen, *err;
int width, precision, thisarg, flags;
char formatbuf[16];
char *f;
int argpos = firstarg;
int isfloat;
static int dummyivec[3] = {0, 0, 0};
static float dummyvec[3] = {0, 0, 0};
#define PRINTF_ALTERNATE 1
#define PRINTF_ZEROPAD 2
#define PRINTF_LEFT 4
#define PRINTF_SPACEPOSITIVE 8
#define PRINTF_SIGNPOSITIVE 16
formatbuf[0] = '%';
#define GETARG_FLOAT(a) (((a)>=firstarg && (a)<prinst->callargc) ? (G_FLOAT(OFS_PARM0 + 3 * (a))) : 0)
#define GETARG_VECTOR(a) (((a)>=firstarg && (a)<prinst->callargc) ? (G_VECTOR(OFS_PARM0 + 3 * (a))) : dummyvec)
#define GETARG_INT(a) (((a)>=firstarg && (a)<prinst->callargc) ? (G_INT(OFS_PARM0 + 3 * (a))) : 0)
#define GETARG_INTVECTOR(a) (((a)>=firstarg && (a)<prinst->callargc) ? ((int*) G_VECTOR(OFS_PARM0 + 3 * (a))) : dummyivec)
#define GETARG_STRING(a) (((a)>=firstarg && (a)<prinst->callargc) ? (PR_GetStringOfs(prinst, OFS_PARM0 + 3 * (a))) : "")
for(;;)
{
s0 = s;
switch(*s)
{
case 0:
goto finished;
case '%':
++s;
if(*s == '%')
goto verbatim;
// complete directive format:
// %3$*1$.*2$ld
width = -1;
precision = -1;
thisarg = -1;
flags = 0;
isfloat = -1;
// is number following?
if(*s >= '0' && *s <= '9')
{
width = strtol(s, &err, 10);
if(!err)
{
printf("PF_sprintf: bad format string: %s\n", s0);
goto finished;
}
if(*err == '$')
{
thisarg = width + (firstarg-1);
width = -1;
s = err + 1;
}
else
{
if(*s == '0')
{
flags |= PRINTF_ZEROPAD;
if(width == 0)
width = -1; // it was just a flag
}
s = err;
}
}
if(width < 0)
{
for(;;)
{
switch(*s)
{
case '#': flags |= PRINTF_ALTERNATE; break;
case '0': flags |= PRINTF_ZEROPAD; break;
case '-': flags |= PRINTF_LEFT; break;
case ' ': flags |= PRINTF_SPACEPOSITIVE; break;
case '+': flags |= PRINTF_SIGNPOSITIVE; break;
default:
goto noflags;
}
++s;
}
noflags:
if(*s == '*')
{
++s;
if(*s >= '0' && *s <= '9')
{
width = strtol(s, &err, 10);
if(!err || *err != '$')
{
printf("PF_sprintf: invalid format string: %s\n", s0);
goto finished;
}
s = err + 1;
}
else
width = argpos++;
width = GETARG_FLOAT(width);
if(width < 0)
{
flags |= PRINTF_LEFT;
width = -width;
}
}
else if(*s >= '0' && *s <= '9')
{
width = strtol(s, &err, 10);
if(!err)
{
printf("PF_sprintf: invalid format string: %s\n", s0);
goto finished;
}
s = err;
if(width < 0)
{
flags |= PRINTF_LEFT;
width = -width;
}
}
// otherwise width stays -1
}
if(*s == '.')
{
++s;
if(*s == '*')
{
++s;
if(*s >= '0' && *s <= '9')
{
precision = strtol(s, &err, 10);
if(!err || *err != '$')
{
printf("PF_sprintf: invalid format string: %s\n", s0);
goto finished;
}
s = err + 1;
}
else
precision = argpos++;
precision = GETARG_FLOAT(precision);
}
else if(*s >= '0' && *s <= '9')
{
precision = strtol(s, &err, 10);
if(!err)
{
printf("PF_sprintf: invalid format string: %s\n", s0);
goto finished;
}
s = err;
}
else
{
printf("PF_sprintf: invalid format string: %s\n", s0);
goto finished;
}
}
for(;;)
{
switch(*s)
{
case 'h': isfloat = 1; break;
case 'l': isfloat = 0; break;
case 'L': isfloat = 0; break;
case 'j': break;
case 'z': break;
case 't': break;
default:
goto nolength;
}
++s;
}
nolength:
// now s points to the final directive char and is no longer changed
if (*s == 'p' || *s == 'P')
{
//%p is slightly different from %x.
//always 8-bytes wide with 0 padding, always ints.
flags |= PRINTF_ZEROPAD;
if (width < 0) width = 8;
if (isfloat < 0) isfloat = 0;
}
else if (*s == 'i')
{
//%i defaults to ints, not floats.
if(isfloat < 0) isfloat = 0;
}
//assume floats, not ints.
if(isfloat < 0)
isfloat = 1;
if(thisarg < 0)
thisarg = argpos++;
if(o < end - 1)
{
f = &formatbuf[1];
if(*s != 's' && *s != 'c')
if(flags & PRINTF_ALTERNATE) *f++ = '#';
if(flags & PRINTF_ZEROPAD) *f++ = '0';
if(flags & PRINTF_LEFT) *f++ = '-';
if(flags & PRINTF_SPACEPOSITIVE) *f++ = ' ';
if(flags & PRINTF_SIGNPOSITIVE) *f++ = '+';
*f++ = '*';
if(precision >= 0)
{
*f++ = '.';
*f++ = '*';
}
if (*s == 'p')
*f++ = 'x';
else if (*s == 'P')
*f++ = 'X';
else
*f++ = *s;
*f++ = 0;
if(width < 0) // not set
width = 0;
switch(*s)
{
case 'd': case 'i':
if(precision < 0) // not set
Q_snprintfz(o, end - o, formatbuf, width, (isfloat ? (int) GETARG_FLOAT(thisarg) : (int) GETARG_INT(thisarg)));
else
Q_snprintfz(o, end - o, formatbuf, width, precision, (isfloat ? (int) GETARG_FLOAT(thisarg) : (int) GETARG_INT(thisarg)));
o += strlen(o);
break;
case 'o': case 'u': case 'x': case 'X': case 'p': case 'P':
if(precision < 0) // not set
Q_snprintfz(o, end - o, formatbuf, width, (isfloat ? (unsigned int) GETARG_FLOAT(thisarg) : (unsigned int) GETARG_INT(thisarg)));
else
Q_snprintfz(o, end - o, formatbuf, width, precision, (isfloat ? (unsigned int) GETARG_FLOAT(thisarg) : (unsigned int) GETARG_INT(thisarg)));
o += strlen(o);
break;
case 'e': case 'E': case 'f': case 'F': case 'g': case 'G':
if(precision < 0) // not set
Q_snprintfz(o, end - o, formatbuf, width, (isfloat ? (double) GETARG_FLOAT(thisarg) : (double) GETARG_INT(thisarg)));
else
Q_snprintfz(o, end - o, formatbuf, width, precision, (isfloat ? (double) GETARG_FLOAT(thisarg) : (double) GETARG_INT(thisarg)));
o += strlen(o);
break;
case 'v': case 'V':
f[-2] += 'g' - 'v';
if(precision < 0) // not set
Q_snprintfz(o, end - o, va("%s %s %s", /* NESTED SPRINTF IS NESTED */ formatbuf, formatbuf, formatbuf),
width, (isfloat ? (double) GETARG_VECTOR(thisarg)[0] : (double) GETARG_INTVECTOR(thisarg)[0]),
width, (isfloat ? (double) GETARG_VECTOR(thisarg)[1] : (double) GETARG_INTVECTOR(thisarg)[1]),
width, (isfloat ? (double) GETARG_VECTOR(thisarg)[2] : (double) GETARG_INTVECTOR(thisarg)[2])
);
else
Q_snprintfz(o, end - o, va("%s %s %s", /* NESTED SPRINTF IS NESTED */ formatbuf, formatbuf, formatbuf),
width, precision, (isfloat ? (double) GETARG_VECTOR(thisarg)[0] : (double) GETARG_INTVECTOR(thisarg)[0]),
width, precision, (isfloat ? (double) GETARG_VECTOR(thisarg)[1] : (double) GETARG_INTVECTOR(thisarg)[1]),
width, precision, (isfloat ? (double) GETARG_VECTOR(thisarg)[2] : (double) GETARG_INTVECTOR(thisarg)[2])
);
o += strlen(o);
break;
case 'c':
//UTF-8-FIXME: figure it out yourself
// if(flags & PRINTF_ALTERNATE)
{
if(precision < 0) // not set
Q_snprintfz(o, end - o, formatbuf, width, (isfloat ? (unsigned int) GETARG_FLOAT(thisarg) : (unsigned int) GETARG_INT(thisarg)));
else
Q_snprintfz(o, end - o, formatbuf, width, precision, (isfloat ? (unsigned int) GETARG_FLOAT(thisarg) : (unsigned int) GETARG_INT(thisarg)));
o += strlen(o);
}
/* else
{
unsigned int c = (isfloat ? (unsigned int) GETARG_FLOAT(thisarg) : (unsigned int) GETARG_INT(thisarg));
char charbuf16[16];
const char *buf = u8_encodech(c, NULL, charbuf16);
if(!buf)
buf = "";
if(precision < 0) // not set
precision = end - o - 1;
o += u8_strpad(o, end - o, buf, (flags & PRINTF_LEFT) != 0, width, precision);
}
*/ break;
case 's':
//UTF-8-FIXME: figure it out yourself
// if(flags & PRINTF_ALTERNATE)
{
if(precision < 0) // not set
Q_snprintfz(o, end - o, formatbuf, width, GETARG_STRING(thisarg));
else
Q_snprintfz(o, end - o, formatbuf, width, precision, GETARG_STRING(thisarg));
o += strlen(o);
}
/* else
{
if(precision < 0) // not set
precision = end - o - 1;
o += u8_strpad(o, end - o, GETARG_STRING(thisarg), (flags & PRINTF_LEFT) != 0, width, precision);
}
*/ break;
default:
printf("PF_sprintf: invalid format string: %s\n", s0);
goto finished;
}
}
++s;
break;
default:
verbatim:
if(o < end - 1)
*o++ = *s;
s++;
break;
}
}
finished:
*o = 0;
}
void PF_printf (pubprogfuncs_t *prinst, struct globalvars_s *pr_globals)
{
char outbuf[4096];
PF_sprintf_internal(prinst, pr_globals, PR_GetStringOfs(prinst, OFS_PARM0), 1, outbuf, sizeof(outbuf));
printf("%s", outbuf);
}
void PF_spawn (pubprogfuncs_t *prinst, struct globalvars_s *pr_globals)
{
struct edict_s *ed;
ed = ED_Alloc(prinst, false, 0);
pr_globals = PR_globals(prinst, PR_CURRENT);
RETURN_EDICT(prinst, ed);
}
void PF_bad (pubprogfuncs_t *prinst, struct globalvars_s *gvars)
{
printf("bad builtin\n");
}
builtin_t builtins[] = {
PF_bad,
PF_puts,
PF_putv,
PF_putf,
PF_printf,
PF_spawn
};
//Called when the qc library has some sort of serious error.
void Sys_Abort(char *s, ...)
{ //quake handles this with a longjmp.
va_list ap;
va_start(ap, s);
vprintf(s, ap);
va_end(ap);
exit(1);
}
//Called when the library has something to say.
//Kinda required for the compiler...
//Not really that useful for the normal vm.
int Sys_Printf(char *s, ...)
{ //look up quake's va function to find out how to deal with variable arguments properly.
return printf("%s", s);
}
#include <stdio.h>
//copy file into buffer. note that the buffer will have been sized to fit the file (obtained via FileSize)
void *PDECL Sys_ReadFile(const char *fname, unsigned char *(PDECL *buf_get)(void *ctx, size_t len), void *buf_ctx, size_t *out_size, pbool issourcefile)
{
void *buffer;
int len;
FILE *f;
if (!strncmp(fname, "src/", 4))
fname+=4; //skip the src part
f = fopen(fname, "rb");
if (!f)
return NULL;
fseek(f, 0, SEEK_END);
len = ftell(f);
buffer = buf_get(buf_ctx, len);
fseek(f, 0, SEEK_SET);
fread(buffer, 1, len, f);
fclose(f);
*out_size = len;
return buffer;
}
//Finds the size of a file.
int Sys_FileSize (const char *fname)
{
int len;
FILE *f;
if (!strncmp(fname, "src/", 4))
fname+=4; //skip the src part
f = fopen(fname, "rb");
if (!f)
return -1;
fseek(f, 0, SEEK_END);
len = ftell(f);
fclose(f);
return len;
}
//Writes a file.
pbool Sys_WriteFile (const char *fname, void *data, int len)
{
FILE *f;
f = fopen(fname, "wb");
if (!f)
return 0;
fwrite(data, 1, len, f);
fclose(f);
return 1;
}
void runtest(const char *progsname)
{
pubprogfuncs_t *pf;
func_t func;
progsnum_t pn;
progparms_t ext;
memset(&ext, 0, sizeof(ext));
ext.progsversion = PROGSTRUCT_VERSION;
ext.ReadFile = Sys_ReadFile;
ext.FileSize= Sys_FileSize;
ext.Abort = Sys_Abort;
ext.Printf = printf;
ext.numglobalbuiltins = sizeof(builtins)/sizeof(builtins[0]);
ext.globalbuiltins = builtins;
pf = InitProgs(&ext);
pf->Configure(pf, 1024*1024, 1, false); //memory quantity of 1mb. Maximum progs loadable into the instance of 1
//If you support multiple progs types, you should tell the VM the offsets here, via RegisterFieldVar
pn = pf->LoadProgs(pf, progsname); //load the progs.
if (pn < 0)
printf("test: Failed to load progs \"%s\"\n", progsname);
else
{
//allocate qc-acessable strings here for 64bit cpus. (allocate via AddString, tempstringbase is a holding area not used by the actual vm)
//you can call functions before InitEnts if you want. it's not really advised for anything except naming additional progs. This sample only allows one max.
pf->InitEnts(pf, 10); //Now we know how many fields required, we can say how many maximum ents we want to allow. 10 in this case. This can be huge without too many problems.
//now it's safe to ED_Alloc.
func = pf->FindFunction(pf, "main", PR_ANY); //find the function 'main' in the first progs that has it.
if (!func)
printf("Couldn't find function\n");
else
pf->ExecuteProgram(pf, func); //call the function
}
pf->Shutdown(pf);
}
//Run a compiler and nothing else.
//Note that this could be done with an autocompile of PR_COMPILEALWAYS.
void compile(int argc, const char **argv)
{
pubprogfuncs_t *pf;
progparms_t ext;
if (0)
{
char *testsrcfile = //newstyle progs.src must start with a #.
//it's newstyle to avoid using multiple source files.
"#pragma PROGS_DAT \"testprogs.dat\"\r\n"
"//INTERMEDIATE FILE - EDIT TEST.C INSTEAD\r\n"
"\r\n"
"void(...) print = #1;\r\n"
"void() main =\r\n"
"{\r\n"
" print(\"hello world\\n\");\r\n"
"};\r\n";
//so that the file exists. We could insert it via the callbacks instead
Sys_WriteFile("progs.src", testsrcfile, strlen(testsrcfile));
}
memset(&ext, 0, sizeof(ext));
ext.progsversion = PROGSTRUCT_VERSION;
ext.ReadFile = Sys_ReadFile;
ext.FileSize= Sys_FileSize;
ext.WriteFile= Sys_WriteFile;
ext.Abort = Sys_Abort;
ext.Printf = printf;
pf = InitProgs(&ext);
if (pf->StartCompile)
{
if (pf->StartCompile(pf, argc, argv))
{
while(pf->ContinueCompile(pf) == 1)
;
}
else
printf("compilation failed to start\n");
}
else
printf("no compiler in this qcvm build\n");
pf->Shutdown(pf);
}
int main(int argc, const char **argv)
{
if (argc < 2)
{
printf("Invalid arguments!\nPlease run as, for example:\n%s testprogs.dat -srcfile progs.src\nThe first argument is the name of the progs.dat to run, the remaining arguments are the qcc args to use", argv[0]);
return 0;
}
compile(argc-1, argv+1);
runtest(argv[1]);
return 0;
}
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