351 lines
8.4 KiB
C++
351 lines
8.4 KiB
C++
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/* see copyright notice in squirrel.h */
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#include <squirrel.h>
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#include <sqstdstring.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <assert.h>
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#ifdef _UNICODE
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#define scstrchr wcschr
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#define scsnprintf wsnprintf
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#define scatoi _wtoi
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#define scstrtok wcstok
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#else
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#define scstrchr strchr
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#define scsnprintf snprintf
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#define scatoi atoi
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#define scstrtok strtok
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#endif
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#define MAX_FORMAT_LEN 20
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#define MAX_WFORMAT_LEN 3
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#define ADDITIONAL_FORMAT_SPACE (100*sizeof(SQChar))
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static SQInteger validate_format(HSQUIRRELVM v, SQChar *fmt, const SQChar *src, SQInteger n,SQInteger &width)
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{
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SQChar swidth[MAX_WFORMAT_LEN];
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SQInteger wc = 0;
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SQInteger start = n;
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fmt[0] = '%';
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while (scstrchr(_SC("-+ #0"), src[n])) n++;
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while (scisdigit(src[n])) {
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swidth[wc] = src[n];
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n++;
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wc++;
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if(wc>=MAX_WFORMAT_LEN)
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return sq_throwerror(v,_SC("width format too long"));
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}
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swidth[wc] = '\0';
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if(wc > 0) {
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width = scatoi(swidth);
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}
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else
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width = 0;
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if (src[n] == '.') {
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n++;
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wc = 0;
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while (scisdigit(src[n])) {
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swidth[wc] = src[n];
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n++;
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wc++;
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if(wc>=MAX_WFORMAT_LEN)
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return sq_throwerror(v,_SC("precision format too long"));
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}
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swidth[wc] = '\0';
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if(wc > 0) {
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width += scatoi(swidth);
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}
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}
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if (n-start > MAX_FORMAT_LEN )
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return sq_throwerror(v,_SC("format too long"));
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memcpy(&fmt[1],&src[start],((n-start)+1)*sizeof(SQChar));
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fmt[(n-start)+2] = '\0';
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return n;
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}
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static SQInteger _string_format(HSQUIRRELVM v)
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{
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const SQChar *format;
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SQChar *dest;
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SQChar fmt[MAX_FORMAT_LEN];
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sq_getstring(v,2,&format);
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SQInteger allocated = (sq_getsize(v,2)+1)*sizeof(SQChar);
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dest = sq_getscratchpad(v,allocated);
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SQInteger n = 0,i = 0, nparam = 3, w = 0;
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while(format[n] != '\0') {
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if(format[n] != '%') {
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assert(i < allocated);
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dest[i++] = format[n];
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n++;
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}
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else if(format[n+1] == '%') { //handles %%
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dest[i++] = '%';
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n += 2;
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}
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else {
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n++;
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if( nparam > sq_gettop(v) )
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return sq_throwerror(v,_SC("not enough paramters for the given format string"));
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n = validate_format(v,fmt,format,n,w);
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if(n < 0) return -1;
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SQInteger addlen = 0;
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SQInteger valtype = 0;
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const SQChar *ts;
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SQInteger ti;
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SQFloat tf;
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switch(format[n]) {
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case 's':
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if(SQ_FAILED(sq_getstring(v,nparam,&ts)))
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return sq_throwerror(v,_SC("string expected for the specified format"));
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addlen = (sq_getsize(v,nparam)*sizeof(SQChar))+((w+1)*sizeof(SQChar));
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valtype = 's';
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break;
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case 'i': case 'd': case 'c':case 'o': case 'u': case 'x': case 'X':
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if(SQ_FAILED(sq_getinteger(v,nparam,&ti)))
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return sq_throwerror(v,_SC("integer expected for the specified format"));
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addlen = (ADDITIONAL_FORMAT_SPACE)+((w+1)*sizeof(SQChar));
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valtype = 'i';
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break;
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case 'f': case 'g': case 'G': case 'e': case 'E':
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if(SQ_FAILED(sq_getfloat(v,nparam,&tf)))
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return sq_throwerror(v,_SC("float expected for the specified format"));
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addlen = (ADDITIONAL_FORMAT_SPACE)+((w+1)*sizeof(SQChar));
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valtype = 'f';
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break;
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default:
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return sq_throwerror(v,_SC("invalid format"));
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}
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n++;
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allocated += addlen;
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dest = sq_getscratchpad(v,allocated);
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switch(valtype) {
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case 's': i += scsprintf(&dest[i],fmt,ts); break;
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case 'i': i += scsprintf(&dest[i],fmt,ti); break;
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case 'f': i += scsprintf(&dest[i],fmt,tf); break;
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};
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nparam ++;
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}
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}
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sq_pushstring(v,dest,i);
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return 1;
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}
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static void __strip_l(const SQChar *str,const SQChar **start)
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{
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const SQChar *t = str;
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while(((*t) != '\0') && scisspace(*t)){ t++; }
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*start = t;
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}
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static void __strip_r(const SQChar *str,SQInteger len,const SQChar **end)
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{
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if(len == 0) {
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*end = str;
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return;
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}
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const SQChar *t = &str[len-1];
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while(t != str && scisspace(*t)) { t--; }
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*end = t+1;
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}
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static SQInteger _string_strip(HSQUIRRELVM v)
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{
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const SQChar *str,*start,*end;
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sq_getstring(v,2,&str);
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SQInteger len = sq_getsize(v,2);
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__strip_l(str,&start);
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__strip_r(str,len,&end);
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sq_pushstring(v,start,end - start);
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return 1;
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}
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static SQInteger _string_lstrip(HSQUIRRELVM v)
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{
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const SQChar *str,*start;
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sq_getstring(v,2,&str);
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__strip_l(str,&start);
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sq_pushstring(v,start,-1);
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return 1;
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}
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static SQInteger _string_rstrip(HSQUIRRELVM v)
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{
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const SQChar *str,*end;
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sq_getstring(v,2,&str);
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SQInteger len = sq_getsize(v,2);
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__strip_r(str,len,&end);
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sq_pushstring(v,str,end - str);
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return 1;
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}
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static SQInteger _string_split(HSQUIRRELVM v)
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{
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const SQChar *str,*seps;
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SQChar *stemp,*tok;
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sq_getstring(v,2,&str);
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sq_getstring(v,3,&seps);
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if(sq_getsize(v,3) == 0) return sq_throwerror(v,_SC("empty separators string"));
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SQInteger memsize = (sq_getsize(v,2)+1)*sizeof(SQChar);
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stemp = sq_getscratchpad(v,memsize);
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memcpy(stemp,str,memsize);
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tok = scstrtok(stemp,seps);
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sq_newarray(v,0);
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while( tok != NULL ) {
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sq_pushstring(v,tok,-1);
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sq_arrayappend(v,-2);
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tok = scstrtok( NULL, seps );
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}
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return 1;
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}
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#define SETUP_REX(v) \
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SQRex *self = NULL; \
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sq_getinstanceup(v,1,(SQUserPointer *)&self,0);
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static SQInteger _rexobj_releasehook(SQUserPointer p, SQInteger size)
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{
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SQRex *self = ((SQRex *)p);
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sqstd_rex_free(self);
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return 1;
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}
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static SQInteger _regexp_match(HSQUIRRELVM v)
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{
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SETUP_REX(v);
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const SQChar *str;
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sq_getstring(v,2,&str);
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if(sqstd_rex_match(self,str) == SQTrue)
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{
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sq_pushbool(v,SQTrue);
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return 1;
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}
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sq_pushbool(v,SQFalse);
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return 1;
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}
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static void _addrexmatch(HSQUIRRELVM v,const SQChar *str,const SQChar *begin,const SQChar *end)
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{
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sq_newtable(v);
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sq_pushstring(v,_SC("begin"),-1);
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sq_pushinteger(v,begin - str);
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sq_rawset(v,-3);
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sq_pushstring(v,_SC("end"),-1);
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sq_pushinteger(v,end - str);
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sq_rawset(v,-3);
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}
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static SQInteger _regexp_search(HSQUIRRELVM v)
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{
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SETUP_REX(v);
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const SQChar *str,*begin,*end;
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SQInteger start = 0;
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sq_getstring(v,2,&str);
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if(sq_gettop(v) > 2) sq_getinteger(v,3,&start);
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if(sqstd_rex_search(self,str+start,&begin,&end) == SQTrue) {
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_addrexmatch(v,str,begin,end);
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return 1;
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}
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return 0;
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}
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static SQInteger _regexp_capture(HSQUIRRELVM v)
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{
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SETUP_REX(v);
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const SQChar *str,*begin,*end;
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SQInteger start = 0;
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sq_getstring(v,2,&str);
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if(sq_gettop(v) > 2) sq_getinteger(v,3,&start);
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if(sqstd_rex_search(self,str+start,&begin,&end) == SQTrue) {
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SQInteger n = sqstd_rex_getsubexpcount(self);
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SQRexMatch match;
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sq_newarray(v,0);
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for(SQInteger i = 0;i < n; i++) {
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sqstd_rex_getsubexp(self,i,&match);
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if(match.len > 0)
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_addrexmatch(v,str,match.begin,match.begin+match.len);
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else
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_addrexmatch(v,str,str,str); //empty match
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sq_arrayappend(v,-2);
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}
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return 1;
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}
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return 0;
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}
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static SQInteger _regexp_subexpcount(HSQUIRRELVM v)
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{
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SETUP_REX(v);
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sq_pushinteger(v,sqstd_rex_getsubexpcount(self));
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return 1;
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}
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static SQInteger _regexp_constructor(HSQUIRRELVM v)
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{
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const SQChar *error,*pattern;
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sq_getstring(v,2,&pattern);
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SQRex *rex = sqstd_rex_compile(pattern,&error);
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if(!rex) return sq_throwerror(v,error);
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sq_setinstanceup(v,1,rex);
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sq_setreleasehook(v,1,_rexobj_releasehook);
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return 0;
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}
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static SQInteger _regexp__typeof(HSQUIRRELVM v)
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{
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sq_pushstring(v,_SC("regexp"),-1);
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return 1;
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}
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#define _DECL_REX_FUNC(name,nparams,pmask) {_SC(#name),_regexp_##name,nparams,pmask}
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static SQRegFunction rexobj_funcs[]={
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_DECL_REX_FUNC(constructor,2,_SC(".s")),
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_DECL_REX_FUNC(search,-2,_SC("xsn")),
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_DECL_REX_FUNC(match,2,_SC("xs")),
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_DECL_REX_FUNC(capture,-2,_SC("xsn")),
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_DECL_REX_FUNC(subexpcount,1,_SC("x")),
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_DECL_REX_FUNC(_typeof,1,_SC("x")),
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{0,0}
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};
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#define _DECL_FUNC(name,nparams,pmask) {_SC(#name),_string_##name,nparams,pmask}
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static SQRegFunction stringlib_funcs[]={
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_DECL_FUNC(format,-2,_SC(".s")),
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_DECL_FUNC(strip,2,_SC(".s")),
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_DECL_FUNC(lstrip,2,_SC(".s")),
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_DECL_FUNC(rstrip,2,_SC(".s")),
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_DECL_FUNC(split,3,_SC(".ss")),
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{0,0}
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};
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SQInteger sqstd_register_stringlib(HSQUIRRELVM v)
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{
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sq_pushstring(v,_SC("regexp"),-1);
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sq_newclass(v,SQFalse);
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SQInteger i = 0;
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while(rexobj_funcs[i].name != 0) {
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SQRegFunction &f = rexobj_funcs[i];
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sq_pushstring(v,f.name,-1);
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sq_newclosure(v,f.f,0);
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sq_setparamscheck(v,f.nparamscheck,f.typemask);
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sq_setnativeclosurename(v,-1,f.name);
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sq_createslot(v,-3);
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i++;
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}
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sq_createslot(v,-3);
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i = 0;
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while(stringlib_funcs[i].name!=0)
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{
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sq_pushstring(v,stringlib_funcs[i].name,-1);
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sq_newclosure(v,stringlib_funcs[i].f,0);
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sq_setparamscheck(v,stringlib_funcs[i].nparamscheck,stringlib_funcs[i].typemask);
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sq_setnativeclosurename(v,-1,stringlib_funcs[i].name);
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sq_createslot(v,-3);
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i++;
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}
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return 1;
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}
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