521 lines
12 KiB
C++
521 lines
12 KiB
C++
/**
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* @author Alberto DEMICHELIS
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* @author Edouard DUPIN
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* @copyright 2018, Edouard DUPIN, all right reserved
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* @copyright 2003-2017, Alberto DEMICHELIS, all right reserved
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* @license MPL-2 (see license file)
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*/
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#include <rabbit/rabbit.hpp>
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#include <rabbit-std/sqstdstring.hpp>
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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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#define MAX_FORMAT_LEN 20
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#define MAX_WFORMAT_LEN 3
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#define ADDITIONAL_FORMAT_SPACE (100*sizeof(char))
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static rabbit::Bool isfmtchr(char ch)
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{
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switch(ch) {
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case '-':
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case '+':
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case ' ':
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case '#':
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case '0':
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return SQTrue;
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}
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return SQFalse;
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}
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static int64_t validate_format(rabbit::VirtualMachine* v, char *fmt, const char *src, int64_t n,int64_t &width)
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{
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char *dummy;
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char swidth[MAX_WFORMAT_LEN];
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int64_t wc = 0;
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int64_t start = n;
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fmt[0] = '%';
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while (isfmtchr(src[n])) n++;
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while (isdigit(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,"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 = strtol(swidth,&dummy,10);
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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 (isdigit(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,"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 += strtol(swidth,&dummy,10);
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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,"format too long");
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memcpy(&fmt[1],&src[start],((n-start)+1)*sizeof(char));
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fmt[(n-start)+2] = '\0';
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return n;
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}
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rabbit::Result rabbit::std::format(rabbit::VirtualMachine* v,int64_t nformatstringidx,int64_t *outlen,char **output)
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{
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const char *format;
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char *dest;
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char fmt[MAX_FORMAT_LEN];
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const rabbit::Result res = sq_getstring(v,nformatstringidx,&format);
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if (SQ_FAILED(res)) {
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return res; // propagate the error
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}
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int64_t format_size = sq_getsize(v,nformatstringidx);
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int64_t allocated = (format_size+2)*sizeof(char);
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dest = sq_getscratchpad(v,allocated);
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int64_t n = 0,i = 0, nparam = nformatstringidx+1, w = 0;
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//while(format[n] != '\0')
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while(n < format_size)
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{
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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,"not enough parameters 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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int64_t addlen = 0;
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int64_t valtype = 0;
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const char *ts = NULL;
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int64_t ti = 0;
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float_t tf = 0;
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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,"string expected for the specified format");
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addlen = (sq_getsize(v,nparam)*sizeof(char))+((w+1)*sizeof(char));
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valtype = 's';
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break;
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case 'i': case 'd': case 'o': case 'u': case 'x': case 'X':
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#ifdef _SQ64
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{
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size_t flen = strlen(fmt);
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int64_t fpos = flen - 1;
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char f = fmt[fpos];
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const char *prec = (const char *)_PRINT_INT_PREC;
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while(*prec != '\0') {
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fmt[fpos++] = *prec++;
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}
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fmt[fpos++] = f;
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fmt[fpos++] = '\0';
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}
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#endif
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case 'c':
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if(SQ_FAILED(sq_getinteger(v,nparam,&ti)))
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return sq_throwerror(v,"integer expected for the specified format");
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addlen = (ADDITIONAL_FORMAT_SPACE)+((w+1)*sizeof(char));
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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,"float expected for the specified format");
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addlen = (ADDITIONAL_FORMAT_SPACE)+((w+1)*sizeof(char));
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valtype = 'f';
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break;
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default:
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return sq_throwerror(v,"invalid format");
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}
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n++;
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allocated += addlen + sizeof(char);
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dest = sq_getscratchpad(v,allocated);
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switch(valtype) {
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case 's': i += snprintf(&dest[i],allocated,fmt,ts); break;
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case 'i': i += snprintf(&dest[i],allocated,fmt,ti); break;
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case 'f': i += snprintf(&dest[i],allocated,fmt,tf); break;
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};
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nparam ++;
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}
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}
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*outlen = i;
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dest[i] = '\0';
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*output = dest;
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return SQ_OK;
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}
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static int64_t _string_printf(rabbit::VirtualMachine* v)
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{
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char *dest = NULL;
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int64_t length = 0;
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if(SQ_FAILED(rabbit::std::format(v,2,&length,&dest)))
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return -1;
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SQPRINTFUNCTION printfunc = sq_getprintfunc(v);
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if(printfunc) printfunc(v,dest);
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return 0;
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}
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static int64_t _string_format(rabbit::VirtualMachine* v)
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{
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char *dest = NULL;
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int64_t length = 0;
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if(SQ_FAILED(rabbit::std::format(v,2,&length,&dest)))
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return -1;
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sq_pushstring(v,dest,length);
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return 1;
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}
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static void __strip_l(const char *str,const char **start)
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{
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const char *t = str;
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while(((*t) != '\0') && isspace(*t)){ t++; }
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*start = t;
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}
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static void __strip_r(const char *str,int64_t len,const char **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 char *t = &str[len-1];
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while(t >= str && isspace(*t)) { t--; }
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*end = t + 1;
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}
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static int64_t _string_strip(rabbit::VirtualMachine* v)
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{
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const char *str,*start,*end;
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sq_getstring(v,2,&str);
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int64_t 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 int64_t _string_lstrip(rabbit::VirtualMachine* v)
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{
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const char *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 int64_t _string_rstrip(rabbit::VirtualMachine* v)
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{
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const char *str,*end;
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sq_getstring(v,2,&str);
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int64_t 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 int64_t _string_split(rabbit::VirtualMachine* v)
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{
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const char *str,*seps;
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char *stemp;
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sq_getstring(v,2,&str);
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sq_getstring(v,3,&seps);
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int64_t sepsize = sq_getsize(v,3);
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if(sepsize == 0) return sq_throwerror(v,"empty separators string");
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int64_t memsize = (sq_getsize(v,2)+1)*sizeof(char);
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stemp = sq_getscratchpad(v,memsize);
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memcpy(stemp,str,memsize);
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char *start = stemp;
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char *end = stemp;
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sq_newarray(v,0);
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while(*end != '\0')
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{
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char cur = *end;
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for(int64_t i = 0; i < sepsize; i++)
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{
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if(cur == seps[i])
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{
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*end = 0;
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sq_pushstring(v,start,-1);
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sq_arrayappend(v,-2);
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start = end + 1;
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break;
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}
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}
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end++;
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}
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if(end != start)
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{
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sq_pushstring(v,start,-1);
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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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static int64_t _string_escape(rabbit::VirtualMachine* v)
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{
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const char *str;
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char *dest,*resstr;
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int64_t size;
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sq_getstring(v,2,&str);
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size = sq_getsize(v,2);
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if(size == 0) {
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sq_push(v,2);
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return 1;
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}
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const char *escpat = "\\x%02x";
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const int64_t maxescsize = 4;
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int64_t destcharsize = (size * maxescsize); //assumes every char could be escaped
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resstr = dest = (char *)sq_getscratchpad(v,destcharsize * sizeof(char));
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char c;
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char escch;
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int64_t escaped = 0;
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for(int n = 0; n < size; n++){
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c = *str++;
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escch = 0;
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if(isprint(c) || c == 0) {
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switch(c) {
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case '\a': escch = 'a'; break;
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case '\b': escch = 'b'; break;
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case '\t': escch = 't'; break;
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case '\n': escch = 'n'; break;
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case '\v': escch = 'v'; break;
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case '\f': escch = 'f'; break;
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case '\r': escch = 'r'; break;
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case '\\': escch = '\\'; break;
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case '\"': escch = '\"'; break;
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case '\'': escch = '\''; break;
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case 0: escch = '0'; break;
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}
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if(escch) {
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*dest++ = '\\';
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*dest++ = escch;
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escaped++;
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}
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else {
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*dest++ = c;
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}
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}
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else {
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dest += snprintf(dest, destcharsize, escpat, c);
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escaped++;
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}
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}
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if(escaped) {
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sq_pushstring(v,resstr,dest - resstr);
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}
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else {
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sq_push(v,2); //nothing escaped
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}
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return 1;
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}
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static int64_t _string_startswith(rabbit::VirtualMachine* v)
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{
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const char *str,*cmp;
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sq_getstring(v,2,&str);
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sq_getstring(v,3,&cmp);
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int64_t len = sq_getsize(v,2);
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int64_t cmplen = sq_getsize(v,3);
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rabbit::Bool ret = SQFalse;
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if(cmplen <= len) {
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ret = memcmp(str,cmp,sq_rsl(cmplen)) == 0 ? SQTrue : SQFalse;
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}
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sq_pushbool(v,ret);
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return 1;
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}
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static int64_t _string_endswith(rabbit::VirtualMachine* v)
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{
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const char *str,*cmp;
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sq_getstring(v,2,&str);
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sq_getstring(v,3,&cmp);
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int64_t len = sq_getsize(v,2);
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int64_t cmplen = sq_getsize(v,3);
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rabbit::Bool ret = SQFalse;
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if(cmplen <= len) {
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ret = memcmp(&str[len - cmplen],cmp,sq_rsl(cmplen)) == 0 ? SQTrue : SQFalse;
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}
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sq_pushbool(v,ret);
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return 1;
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}
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#define SETUP_REX(v) \
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rabbit::std::SQRex *self = NULL; \
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rabbit::sq_getinstanceup(v,1,(rabbit::UserPointer *)&self,0);
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static int64_t _rexobj_releasehook(rabbit::UserPointer p, int64_t SQ_UNUSED_ARG(size))
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{
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rabbit::std::SQRex *self = ((rabbit::std::SQRex *)p);
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rabbit::std::rex_free(self);
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return 1;
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}
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static int64_t _regexp_match(rabbit::VirtualMachine* v)
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{
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SETUP_REX(v);
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const char *str;
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sq_getstring(v,2,&str);
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if(rabbit::std::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(rabbit::VirtualMachine* v,const char *str,const char *begin,const char *end)
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{
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sq_newtable(v);
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sq_pushstring(v,"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,"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 int64_t _regexp_search(rabbit::VirtualMachine* v)
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{
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SETUP_REX(v);
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const char *str,*begin,*end;
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int64_t 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(rabbit::std::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 int64_t _regexp_capture(rabbit::VirtualMachine* v)
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{
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SETUP_REX(v);
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const char *str,*begin,*end;
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int64_t 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(rabbit::std::rex_search(self,str+start,&begin,&end) == SQTrue) {
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int64_t n = rabbit::std::rex_getsubexpcount(self);
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rabbit::std::SQRexMatch match;
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sq_newarray(v,0);
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for(int64_t i = 0;i < n; i++) {
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rabbit::std::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 int64_t _regexp_subexpcount(rabbit::VirtualMachine* v)
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{
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SETUP_REX(v);
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sq_pushinteger(v,rabbit::std::rex_getsubexpcount(self));
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return 1;
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}
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static int64_t _regexp_constructor(rabbit::VirtualMachine* v)
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{
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const char *error,*pattern;
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sq_getstring(v,2,&pattern);
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rabbit::std::SQRex *rex = rabbit::std::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 int64_t _regexp__typeof(rabbit::VirtualMachine* v)
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{
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sq_pushstring(v,"regexp",-1);
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return 1;
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}
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#define _DECL_REX_FUNC(name,nparams,pmask) {#name,_regexp_##name,nparams,pmask}
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static const rabbit::RegFunction rexobj_funcs[]={
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_DECL_REX_FUNC(constructor,2,".s"),
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_DECL_REX_FUNC(search,-2,"xsn"),
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_DECL_REX_FUNC(match,2,"xs"),
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_DECL_REX_FUNC(capture,-2,"xsn"),
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_DECL_REX_FUNC(subexpcount,1,"x"),
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_DECL_REX_FUNC(_typeof,1,"x"),
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{NULL,(SQFUNCTION)0,0,NULL}
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};
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#undef _DECL_REX_FUNC
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#define _DECL_FUNC(name,nparams,pmask) {#name,_string_##name,nparams,pmask}
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static const rabbit::RegFunction stringlib_funcs[]={
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_DECL_FUNC(format,-2,".s"),
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_DECL_FUNC(printf,-2,".s"),
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_DECL_FUNC(strip,2,".s"),
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_DECL_FUNC(lstrip,2,".s"),
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_DECL_FUNC(rstrip,2,".s"),
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_DECL_FUNC(split,3,".ss"),
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_DECL_FUNC(escape,2,".s"),
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_DECL_FUNC(startswith,3,".ss"),
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_DECL_FUNC(endswith,3,".ss"),
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{NULL,(SQFUNCTION)0,0,NULL}
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};
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#undef _DECL_FUNC
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int64_t rabbit::std::register_stringlib(rabbit::VirtualMachine* v)
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{
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sq_pushstring(v,"regexp",-1);
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sq_newclass(v,SQFalse);
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int64_t i = 0;
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while(rexobj_funcs[i].name != 0) {
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const rabbit::RegFunction &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);
|
|
sq_newslot(v,-3,SQFalse);
|
|
i++;
|
|
}
|
|
sq_newslot(v,-3,SQFalse);
|
|
|
|
i = 0;
|
|
while(stringlib_funcs[i].name!=0)
|
|
{
|
|
sq_pushstring(v,stringlib_funcs[i].name,-1);
|
|
sq_newclosure(v,stringlib_funcs[i].f,0);
|
|
sq_setparamscheck(v,stringlib_funcs[i].nparamscheck,stringlib_funcs[i].typemask);
|
|
sq_setnativeclosurename(v,-1,stringlib_funcs[i].name);
|
|
sq_newslot(v,-3,SQFalse);
|
|
i++;
|
|
}
|
|
return 1;
|
|
}
|