Class: ZScan
- Inherits:
-
Object
- Object
- ZScan
- Defined in:
- lib/zscan/bspec.rb,
lib/zscan.rb,
ext/zscan.c
Overview
generated by rake gen
Defined Under Namespace
Classes: BSpec
Constant Summary collapse
- VERSION =
'2.0.6'
Instance Method Summary collapse
- #<<(substring) ⇒ Object
- #[]=(range, substring) ⇒ Object
- #_internal_init(v_s) ⇒ Object
- #_internal_string ⇒ Object
-
#_try(r) ⇒ Object
optimized version without pushing and block.
- #advance(v_diff) ⇒ Object
- #bytepos ⇒ Object
- #bytepos=(v_bytepos) ⇒ Object
- #bytesize ⇒ Object
- #byteslice(bytesize) ⇒ Object
- #cleanup ⇒ Object
- #clear_pos_stack ⇒ Object
- #drop ⇒ Object
- #eos? ⇒ Boolean
-
#initialize(s, dup = false) ⇒ ZScan
constructor
A new instance of ZScan.
- #line_index ⇒ Object
- #match_bytesize(pattern) ⇒ Object
- #one_or_more(*args) ⇒ Object
- #pop ⇒ Object
- #pos ⇒ Object
- #pos=(new_pos) ⇒ Object
- #push ⇒ Object
- #reset ⇒ Object
- #rest ⇒ Object
- #rest_bytesize ⇒ Object
- #rest_size ⇒ Object
- #restore ⇒ Object
- #scan(pattern) ⇒ Object
- #scan_date(format, start = Date::ITALY) ⇒ Object
- #scan_float ⇒ Object
- #scan_int(radix = nil) ⇒ Object
- #size ⇒ Object
- #skip(pattern) ⇒ Object
- #slice(size) ⇒ Object
- #string ⇒ Object
- #terminate ⇒ Object
- #try ⇒ Object
- #unpack(fmt) ⇒ Object
- #zero_or_more(*args) ⇒ Object
- #zero_or_one(*args) ⇒ Object
Constructor Details
#initialize(s, dup = false) ⇒ ZScan
Returns a new instance of ZScan.
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# File 'lib/zscan.rb', line 8 def initialize s, dup=false if s.encoding.ascii_compatible? s = dup ? s.dup : s else s = s.encode 'utf-8' end _internal_init s end |
Instance Method Details
#<<(substring) ⇒ Object
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# File 'lib/zscan.rb', line 90 def << substring _internal_string << substring end |
#[]=(range, substring) ⇒ Object
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# File 'lib/zscan.rb', line 94 def []= range, substring start = range.start if start < 0 start = _internal_string.size + start end if start < pos self.pos = start end _internal_string[range] = substring end |
#_internal_init(v_s) ⇒ Object
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# File 'ext/zscan.c', line 36
static VALUE zscan_internal_init(VALUE self, VALUE v_s) {
P;
p->s = v_s;
return self;
}
|
#_internal_string ⇒ Object
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# File 'ext/zscan.c', line 42
static VALUE zscan_internal_string(VALUE self) {
P;
return p->s;
}
|
#_try(r) ⇒ Object
optimized version without pushing and block
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# File 'ext/zscan.c', line 318
static VALUE zscan__try(VALUE self, VALUE r) {
if (RTEST(r)) {
zscan_drop(self);
} else {
zscan_pop(self);
}
return r;
}
|
#advance(v_diff) ⇒ Object
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# File 'ext/zscan.c', line 52
static VALUE zscan_advance(VALUE self, VALUE v_diff) {
P;
long n = p->pos + NUM2LONG(v_diff);
if (n < 0) {
p->pos = 0;
p->bytepos = 0;
return self;
}
// because there's no "reverse scan" API, we have a O(n) routine :(
if (n < p->pos) {
p->pos = 0;
p->bytepos = 0;
}
if (n > p->pos) {
rb_encoding* enc = rb_enc_get(p->s);
long byteend = RSTRING_LEN(p->s);
char* ptr = RSTRING_PTR(p->s);
for (; p->pos < n && p->bytepos < byteend;) {
int m = rb_enc_mbclen(ptr + p->bytepos, ptr + byteend, enc);
if (m) {
p->pos++;
p->bytepos += m;
} else {
break;
}
}
}
return self;
}
|
#bytepos ⇒ Object
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# File 'ext/zscan.c', line 84
static VALUE zscan_bytepos(VALUE self) {
P;
return LONG2NUM(p->bytepos);
}
|
#bytepos=(v_bytepos) ⇒ Object
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# File 'ext/zscan.c', line 89
VALUE zscan_bytepos_eq(VALUE self, VALUE v_bytepos) {
P;
long signed_bytepos = NUM2LONG(v_bytepos);
long from, to, bytepos;
if (signed_bytepos > RSTRING_LEN(p->s)) {
bytepos = RSTRING_LEN(p->s);
} else if (signed_bytepos < 0) {
bytepos = 0;
} else {
bytepos = signed_bytepos;
}
if (bytepos > p->bytepos) {
from = p->bytepos;
to = bytepos;
} else if (bytepos < p->bytepos) {
from = bytepos;
to = p->bytepos;
} else {
return v_bytepos;
}
rb_encoding* enc = rb_enc_get(p->s);
char* ptr = RSTRING_PTR(p->s);
long diff = 0;
for (; from < to;) {
int n = rb_enc_mbclen(ptr + from, ptr + to, enc);
if (n) {
diff++;
from += n;
} else {
if (from < to) {
rb_raise(rb_eRuntimeError, "the given bytepos splits character");
return v_bytepos;
}
break;
}
}
if (bytepos > p->bytepos) {
p->pos += diff;
} else if (bytepos < p->bytepos) {
p->pos -= diff;
}
p->bytepos = bytepos;
return v_bytepos;
}
|
#bytesize ⇒ Object
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# File 'lib/zscan.rb', line 109 def bytesize _internal_string.bytesize end |
#byteslice(bytesize) ⇒ Object
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# File 'lib/zscan.rb', line 123 def byteslice bytesize r = _internal_string.byteslice bytepos, bytesize self.bytepos += bytesize r end |
#cleanup ⇒ Object
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# File 'ext/zscan.c', line 173
static VALUE zscan_cleanup(VALUE self) {
P;
long rest_len = RSTRING_LEN(p->s) - p->bytepos;
p->s = rb_funcall(p->s, rb_intern("byteslice"), 2, LONG2NUM(p->bytepos), LONG2NUM(rest_len));
p->bytepos = 0;
p->pos = 0;
return self;
}
|
#clear_pos_stack ⇒ Object
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# File 'ext/zscan.c', line 293
static VALUE zscan_clear_pos_stack(VALUE self) {
P;
p->stack_i = 0;
return self;
}
|
#drop ⇒ Object
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# File 'ext/zscan.c', line 276
static VALUE zscan_drop(VALUE self) {
P;
if (p->stack_i) {
p->stack_i--;
}
return self;
}
|
#eos? ⇒ Boolean
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# File 'ext/zscan.c', line 139
static VALUE zscan_eos_p(VALUE self) {
P;
return (p->bytepos == RSTRING_LEN(p->s) ? Qtrue : Qfalse);
}
|
#line_index ⇒ Object
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# File 'lib/zscan.rb', line 113 def line_index _internal_string.byteslice(0, bytepos).count "\n" end |
#match_bytesize(pattern) ⇒ Object
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# File 'ext/zscan.c', line 183
static VALUE zscan_match_bytesize(VALUE self, VALUE pattern) {
P;
if (TYPE(pattern) == T_STRING) {
volatile VALUE ss = rb_funcall(p->s, rb_intern("byteslice"), 2, LONG2NUM(p->bytepos), LONG2NUM(RSTRING_LEN(p->s) - p->bytepos));
if (RTEST(rb_funcall(ss, rb_intern("start_with?"), 1, pattern))) {
return LONG2NUM(RSTRING_LEN(pattern));
}
} else if (TYPE(pattern) == T_REGEXP) {
regex_t *re = rb_reg_prepare_re(pattern, p->s); // prepare with compatible encoding
int tmpreg = re != RREGEXP(pattern)->ptr;
if (!tmpreg) {
RREGEXP(pattern)->usecnt++;
}
char* ptr = RSTRING_PTR(p->s);
UChar* ptr_end = (UChar*)(ptr + RSTRING_LEN(p->s));
UChar* ptr_match_from = (UChar*)(ptr + p->bytepos);
long ret = onig_match(re, (UChar*)ptr, ptr_end, ptr_match_from, NULL, ONIG_OPTION_NONE);
if (tmpreg) {
if (RREGEXP(pattern)->usecnt) {
onig_free(re);
} else {
onig_free(RREGEXP(pattern)->ptr);
RREGEXP(pattern)->ptr = re;
}
} else {
RREGEXP(pattern)->usecnt--;
}
if (ret == -2) {
rb_raise(rb_eRuntimeError, "regexp buffer overflow");
} else if (ret >= 0) {
return LONG2NUM(ret);
}
} else {
rb_raise(rb_eTypeError, "expect String or Regexp");
}
return Qnil;
}
|
#one_or_more(*args) ⇒ Object
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# File 'ext/zscan.c', line 371
static VALUE zscan_one_or_more(int argc, VALUE* argv, VALUE self) {
REQUIRE_BLOCK;
volatile VALUE a = Qnil;
volatile VALUE r;
r = rb_yield(Qnil);
if (RTEST(r)) {
long backpos;
P;
rb_scan_args(argc, argv, "01", (VALUE*)&a);
if (a == Qnil) {
a = rb_ary_new();
}
rb_funcall(a, rb_intern("<<"), 1, r);
for (;;) {
zscan_push(self);
backpos = p->bytepos;
r = rb_yield(Qnil);
if (RTEST(r) && backpos != p->bytepos) {
rb_funcall(a, rb_intern("<<"), 1, r);
zscan_drop(self);
} else {
zscan_pop(self);
break;
}
}
return a;
} else {
return Qnil;
}
}
|
#pop ⇒ Object
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# File 'ext/zscan.c', line 263
static VALUE zscan_pop(VALUE self) {
P;
if (p->stack_i) {
p->pos = p->stack[p->stack_i].pos;
p->bytepos = p->stack[p->stack_i].bytepos;
p->stack_i--;
} else {
p->pos = 0;
p->bytepos = 0;
}
return self;
}
|
#pos ⇒ Object
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# File 'ext/zscan.c', line 47
static VALUE zscan_pos(VALUE self) {
P;
return LONG2NUM(p->pos);
}
|
#pos=(new_pos) ⇒ Object
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# File 'lib/zscan.rb', line 77 def pos= new_pos advance new_pos - pos end |
#push ⇒ Object
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# File 'ext/zscan.c', line 252
static VALUE zscan_push(VALUE self) {
P;
if (p->stack_i + 1 == p->stack_cap) {
p->stack_cap = p->stack_cap * 1.4 + 3;
p->stack = (Pos*)realloc(p->stack, sizeof(Pos) * p->stack_cap);
}
Pos e = {p->pos, p->bytepos};
p->stack[++p->stack_i] = e;
return self;
}
|
#reset ⇒ Object
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# File 'lib/zscan.rb', line 81 def reset self.pos = 0 self end |
#rest ⇒ Object
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# File 'ext/zscan.c', line 144
static VALUE zscan_rest(VALUE self) {
P;
return rb_funcall(p->s, rb_intern("byteslice"), 2, LONG2NUM(p->bytepos), LONG2NUM(RSTRING_LEN(p->s)));
}
|
#rest_bytesize ⇒ Object
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# File 'ext/zscan.c', line 168
static VALUE zscan_rest_bytesize(VALUE self) {
P;
return LONG2NUM(RSTRING_LEN(p->s) - p->bytepos);
}
|
#rest_size ⇒ Object
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# File 'ext/zscan.c', line 149
static VALUE zscan_rest_size(VALUE self) {
P;
rb_encoding* enc = rb_enc_get(p->s);
char* ptr = RSTRING_PTR(p->s) + p->bytepos;
long len = RSTRING_LEN(p->s) - p->bytepos;
long sz = 0;
for (long i = 0; i < len;) {
long n = rb_enc_mbclen(ptr + i, ptr + len, enc);
if (n) {
sz++;
i += n;
} else {
rb_raise(rb_eRuntimeError, "failed to scan char");
}
}
return LONG2NUM(sz);
}
|
#restore ⇒ Object
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# File 'ext/zscan.c', line 284
static VALUE zscan_restore(VALUE self) {
P;
if (p->stack_i) {
p->pos = p->stack[p->stack_i].pos;
p->bytepos = p->stack[p->stack_i].bytepos;
}
return self;
}
|
#scan(pattern) ⇒ Object
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# File 'ext/zscan.c', line 225
static VALUE zscan_scan(VALUE self, VALUE pattern) {
VALUE v_bytelen = zscan_match_bytesize(self, pattern);
if (v_bytelen == Qnil) {
return Qnil;
} else {
P;
long bytelen = NUM2LONG(v_bytelen);
volatile VALUE ret = rb_funcall(p->s, rb_intern("byteslice"), 2, LONG2NUM(p->bytepos), v_bytelen);
VALUE v_len = rb_str_length(ret);
p->bytepos += bytelen;
p->pos += NUM2LONG(v_len);
return ret;
}
}
|
#scan_date(format, start = Date::ITALY) ⇒ Object
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# File 'lib/zscan.rb', line 60 def scan_date format, start=Date::ITALY s = rest d = DateTime._strptime s, format if d # XXX need 2 parses because the handling is very complex ... dt = DateTime.strptime s, format, start rescue return nil len = s.bytesize if leftover = d[:leftover] len -= leftover.bytesize end self.bytepos += len dt end end |
#scan_float ⇒ Object
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# File 'ext/zscan.c', line 404
VALUE zscan_scan_float(VALUE self) {
P;
if (RSTRING_LEN(p->s) == p->bytepos) {
return Qnil;
}
char* s = RSTRING_PTR(p->s) + p->bytepos;
if (isspace(s[0])) {
return Qnil;
}
char* e;
double d = strtod(s, &e);
if (e == s || e - s > RSTRING_LEN(p->s) - p->bytepos) {
return Qnil;
} else {
// it ok to use advance because the source is ascii compatible
zscan_advance(self, LONG2NUM(e - s));
return DBL2NUM(d);
}
}
|
#scan_int(radix = nil) ⇒ Object
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# File 'lib/zscan.rb', line 21 def scan_int radix=nil negative = false r = try do negative = (scan(/[+\-]/) == '-') if radix.nil? radix = if scan(/0b/i) 2 elsif scan(/0x/i) 16 elsif scan('0') 8 else 10 end end scan \ case radix when 2; /[01]+/ when 8; /[0-7]+/ when 10; /[0-9]+/ # don't use \d because it matches unicode numbers when 16; /\h+/i else if radix < 10 /[0-#{radix}]+/ elsif radix > 36 raise ArgumentError, "invalid radix #{radix}" else end_char = ('a'.ord + (radix - 11)).chr /[0-9a-#{end_char}]+/i end end end if r r = r.to_i radix negative ? -r : r end end |
#size ⇒ Object
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# File 'lib/zscan.rb', line 105 def size _internal_string.size end |
#skip(pattern) ⇒ Object
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# File 'ext/zscan.c', line 240
static VALUE zscan_skip(VALUE self, VALUE pattern) {
volatile VALUE v_bytelen = zscan_match_bytesize(self, pattern);
if (v_bytelen == Qnil) {
return Qnil;
} else {
P;
long bytepos = p->bytepos + NUM2LONG(v_bytelen);
zscan_bytepos_eq(self, LONG2NUM(bytepos));
return LONG2NUM(bytepos);
}
}
|
#slice(size) ⇒ Object
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# File 'lib/zscan.rb', line 117 def slice size r = _internal_string.slice pos, size advance size r end |
#string ⇒ Object
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# File 'lib/zscan.rb', line 17 def string _internal_string.dup end |
#terminate ⇒ Object
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# File 'lib/zscan.rb', line 86 def terminate self.pos = _internal_string.size end |
#try ⇒ Object
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# File 'ext/zscan.c', line 304
static VALUE zscan_try(VALUE self) {
REQUIRE_BLOCK;
VALUE r;
zscan_push(self);
r = rb_yield(Qnil);
if (RTEST(r)) {
zscan_drop(self);
} else {
zscan_pop(self);
}
return r;
}
|
#unpack(fmt) ⇒ Object
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# File 'ext/zscan.c', line 425
VALUE zscan_unpack(VALUE self, VALUE fmt) {
P;
long parsed_len = 0;
volatile VALUE str = zscan_rest(self);
VALUE r = zscan_internal_unpack(str, fmt, &parsed_len);
zscan_bytepos_eq(self, LONG2NUM(p->bytepos + parsed_len));
return r;
}
|
#zero_or_more(*args) ⇒ Object
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# File 'ext/zscan.c', line 346
static VALUE zscan_zero_or_more(int argc, VALUE* argv, VALUE self) {
REQUIRE_BLOCK;
volatile VALUE a = Qnil;
volatile VALUE r;
long backpos;
P;
rb_scan_args(argc, argv, "01", (VALUE*)&a);
if (a == Qnil) {
a = rb_ary_new();
}
for (;;) {
zscan_push(self);
backpos = p->bytepos;
r = rb_yield(Qnil);
if (RTEST(r) && backpos != p->bytepos) {
rb_funcall(a, rb_intern("<<"), 1, r);
zscan_drop(self);
} else {
zscan_pop(self);
break;
}
}
return a;
}
|
#zero_or_one(*args) ⇒ Object
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# File 'ext/zscan.c', line 327
static VALUE zscan_zero_or_one(int argc, VALUE* argv, VALUE self) {
REQUIRE_BLOCK;
volatile VALUE a = Qnil;
volatile VALUE r;
rb_scan_args(argc, argv, "01", (VALUE*)&a);
if (a == Qnil) {
a = rb_ary_new();
}
zscan_push(self);
r = rb_yield(Qnil);
if (RTEST(r)) {
rb_funcall(a, rb_intern("<<"), 1, r);
zscan_drop(self);
} else {
zscan_pop(self);
}
return a;
}
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