Module: CSVScan
- Defined in:
- ext/csvscan/csvscan.c
Defined Under Namespace
Classes: ParseError
Class Method Summary collapse
Class Method Details
.scan(port) ⇒ Object
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# File 'ext/csvscan/csvscan.c', line 20
VALUE csv_scan(VALUE self, VALUE port) {
int cs, act, have = 0, nread = 0, curline = 1;
unsigned char *tokstart = NULL, *tokend = NULL, *buf;
VALUE row, coldata;
VALUE bufsize = Qnil;
int done=0, buffer_size;
if ( !rb_respond_to( port, s_read ) ) {
if ( rb_respond_to( port, s_to_str ) ) {
port = rb_funcall( port, s_to_str, 0 );
StringValue(port);
} else {
rb_raise( rb_eArgError, "bad argument, String or IO only please." );
}
}
buffer_size = BUFSIZE;
if (rb_ivar_defined(self, rb_intern("@buffer_size")) == Qtrue) {
bufsize = rb_ivar_get(self, rb_intern("@buffer_size"));
if (!NIL_P(bufsize)) {
buffer_size = NUM2INT(bufsize);
}
}
buf = ALLOC_N(unsigned char, buffer_size);
#line 47 "csvscan.c"
{
cs = csv_scan_start;
tokstart = 0;
tokend = 0;
act = 0;
}
#line 102 "csvscan.rl"
row = rb_ary_new();
coldata = Qnil;
while( !done ) {
VALUE str;
unsigned char *p = buf + have, *pe;
int len, space = buffer_size - have;
if ( space == 0 ) {
rb_raise(rb_eCSVParseError, "ran out of buffer on line %d.", curline);
}
if ( rb_respond_to( port, s_read ) ) {
str = rb_funcall( port, s_read, 1, INT2FIX(space) );
} else {
str = rb_str_substr( port, nread, space );
}
StringValue(str);
memcpy( p, RSTRING_PTR(str), RSTRING_LEN(str) );
len = RSTRING_LEN(str);
nread += len;
/* If this is the last buffer, tack on an EOF. */
if ( len < space ) {
p[len++] = 0;
done = 1;
}
pe = p + len;
#line 87 "csvscan.c"
{
if ( p == pe )
goto _out;
switch ( cs )
{
tr0:
#line 19 "csvscan.rl"
{tokend = p;{p = ((tokend))-1;}}
goto st2;
tr1:
#line 10 "csvscan.rl"
{
curline += 1;
}
#line 20 "csvscan.rl"
{
rb_ary_push(row, coldata);
rb_yield(row);
coldata = Qnil;
row = rb_ary_new();
}
#line 20 "csvscan.rl"
{tokend = p+1;{p = ((tokend))-1;}}
goto st2;
tr2:
#line 49 "csvscan.rl"
{tokend = p;{
unsigned char ch, *start_p, *wptr, *rptr;
int rest, datalen;
start_p = wptr = tokstart;
rptr = tokstart + 1;
rest = tokend - tokstart - 2;
datalen = 0;
while(rest>0) {
ch = *rptr++;
if (ch=='"') {
rptr++;
rest--;
}
*wptr++ = ch;
datalen++;
rest--;
}
coldata = rb_str_new( start_p, datalen );
}{p = ((tokend))-1;}}
goto st2;
tr5:
#line 1 "csvscan.rl"
{ switch( act ) {
case 0: tokend = tokstart; {goto st1;}
case 4:
{
unsigned char ch, *endp;
int datalen;
datalen = tokend - tokstart;
endp = tokend - 1;
while(datalen>0) {
ch = *endp--;
if (ch==' ' || ch=='\t') {
datalen--;
} else {
break;
}
}
if (datalen==0) {
coldata = Qnil;
} else {
coldata = rb_str_new(tokstart, datalen);
}
}
break;
case 5:
{
unsigned char ch, *start_p, *wptr, *rptr;
int rest, datalen;
start_p = wptr = tokstart;
rptr = tokstart + 1;
rest = tokend - tokstart - 2;
datalen = 0;
while(rest>0) {
ch = *rptr++;
if (ch=='"') {
rptr++;
rest--;
}
*wptr++ = ch;
datalen++;
rest--;
}
coldata = rb_str_new( start_p, datalen );
}
break;
default: break;
}
{p = ((tokend))-1;}}
goto st2;
tr6:
#line 19 "csvscan.rl"
{tokend = p+1;{p = ((tokend))-1;}}
goto st2;
tr7:
#line 19 "csvscan.rl"
{tokend = p+1;{p = ((tokend))-1;}}
#line 10 "csvscan.rl"
{
curline += 1;
}
#line 20 "csvscan.rl"
{
rb_ary_push(row, coldata);
rb_yield(row);
coldata = Qnil;
row = rb_ary_new();
}
goto st2;
tr10:
#line 26 "csvscan.rl"
{tokend = p+1;{
rb_ary_push(row, coldata);
coldata = Qnil;
}{p = ((tokend))-1;}}
goto st2;
st2:
#line 1 "csvscan.rl"
{tokstart = 0;}
#line 1 "csvscan.rl"
{act = 0;}
if ( ++p == pe )
goto _out2;
case 2:
#line 1 "csvscan.rl"
{tokstart = p;}
#line 220 "csvscan.c"
switch( (*p) ) {
case 9u: goto tr6;
case 10u: goto tr7;
case 13u: goto st4;
case 32u: goto tr6;
case 34u: goto st0;
case 44u: goto tr10;
}
if ( 11u <= (*p) && (*p) <= 12u )
goto tr8;
goto tr4;
tr4:
#line 1 "csvscan.rl"
{tokend = p+1;}
#line 30 "csvscan.rl"
{act = 4;}
goto st3;
tr8:
#line 1 "csvscan.rl"
{tokend = p+1;}
#line 19 "csvscan.rl"
{act = 1;}
goto st3;
st3:
if ( ++p == pe )
goto _out3;
case 3:
#line 248 "csvscan.c"
switch( (*p) ) {
case 10u: goto tr5;
case 13u: goto tr5;
case 34u: goto tr5;
case 44u: goto tr5;
}
goto tr4;
st4:
if ( ++p == pe )
goto _out4;
case 4:
if ( (*p) == 10u )
goto tr1;
goto tr0;
tr11:
#line 10 "csvscan.rl"
{
curline += 1;
}
goto st0;
st0:
if ( ++p == pe )
goto _out0;
case 0:
#line 273 "csvscan.c"
switch( (*p) ) {
case 10u: goto tr11;
case 34u: goto tr12;
}
goto st0;
tr12:
#line 1 "csvscan.rl"
{tokend = p+1;}
#line 49 "csvscan.rl"
{act = 5;}
goto st5;
st5:
if ( ++p == pe )
goto _out5;
case 5:
#line 289 "csvscan.c"
if ( (*p) == 34u )
goto st0;
goto tr2;
st1:
goto _out1;
}
_out2: cs = 2; goto _out;
_out3: cs = 3; goto _out;
_out4: cs = 4; goto _out;
_out0: cs = 0; goto _out;
_out5: cs = 5; goto _out;
_out1: cs = 1; goto _out;
_out: {}
}
#line 134 "csvscan.rl"
if ( cs == csv_scan_error ) {
free(buf);
rb_raise(rb_eCSVParseError, "parse error on line %d.", curline);
}
if ( tokstart == 0 ) {
have = 0;
} else {
have = pe - tokstart;
memmove( buf, tokstart, have );
tokend = buf + (tokend - tokstart);
tokstart = buf;
}
}
free(buf);
return Qnil;
}
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