diff options
author | Jari Vetoniemi <jari.vetoniemi@indooratlas.com> | 2020-03-16 18:49:26 +0900 |
---|---|---|
committer | Jari Vetoniemi <jari.vetoniemi@indooratlas.com> | 2020-03-30 00:39:06 +0900 |
commit | fcbf63e62c627deae76c1b8cb8c0876c536ed811 (patch) | |
tree | 64cb17de3f41a2b6fef2368028fbd00349946994 /jni/ruby/ext/stringio/stringio.c |
Fresh start
Diffstat (limited to 'jni/ruby/ext/stringio/stringio.c')
-rw-r--r-- | jni/ruby/ext/stringio/stringio.c | 1621 |
1 files changed, 1621 insertions, 0 deletions
diff --git a/jni/ruby/ext/stringio/stringio.c b/jni/ruby/ext/stringio/stringio.c new file mode 100644 index 0000000..e54f11a --- /dev/null +++ b/jni/ruby/ext/stringio/stringio.c @@ -0,0 +1,1621 @@ +/********************************************************************** + + stringio.c - + + $Author: nobu $ + $RoughId: stringio.c,v 1.13 2002/03/14 03:24:18 nobu Exp $ + created at: Tue Feb 19 04:10:38 JST 2002 + + All the files in this distribution are covered under the Ruby's + license (see the file COPYING). + +**********************************************************************/ + +#include "ruby.h" +#include "ruby/io.h" +#include "ruby/encoding.h" +#if defined(HAVE_FCNTL_H) || defined(_WIN32) +#include <fcntl.h> +#elif defined(HAVE_SYS_FCNTL_H) +#include <sys/fcntl.h> +#endif + +struct StringIO { + VALUE string; + long pos; + long lineno; + int flags; + int count; +}; + +static void strio_init(int, VALUE *, struct StringIO *, VALUE); + +#define IS_STRIO(obj) (rb_typeddata_is_kind_of((obj), &strio_data_type)) +#define error_inval(msg) (errno = EINVAL, rb_sys_fail(msg)) + +static struct StringIO * +strio_alloc(void) +{ + struct StringIO *ptr = ALLOC(struct StringIO); + ptr->string = Qnil; + ptr->pos = 0; + ptr->lineno = 0; + ptr->flags = 0; + ptr->count = 1; + return ptr; +} + +static void +strio_mark(void *p) +{ + struct StringIO *ptr = p; + if (ptr) { + rb_gc_mark(ptr->string); + } +} + +static void +strio_free(void *p) +{ + struct StringIO *ptr = p; + if (--ptr->count <= 0) { + xfree(ptr); + } +} + +static size_t +strio_memsize(const void *p) +{ + const struct StringIO *ptr = p; + if (!ptr) return 0; + return sizeof(struct StringIO); +} + +static const rb_data_type_t strio_data_type = { + "strio", + { + strio_mark, + strio_free, + strio_memsize, + }, + 0, 0, RUBY_TYPED_FREE_IMMEDIATELY +}; + +#define check_strio(self) ((struct StringIO*)rb_check_typeddata((self), &strio_data_type)) + +static struct StringIO* +get_strio(VALUE self) +{ + struct StringIO *ptr = check_strio(rb_io_taint_check(self)); + + if (!ptr) { + rb_raise(rb_eIOError, "uninitialized stream"); + } + return ptr; +} + +static VALUE +strio_substr(struct StringIO *ptr, long pos, long len) +{ + VALUE str = ptr->string; + rb_encoding *enc = rb_enc_get(str); + long rlen = RSTRING_LEN(str) - pos; + + if (len > rlen) len = rlen; + if (len < 0) len = 0; + if (len == 0) return rb_str_new(0,0); + return rb_enc_str_new(RSTRING_PTR(str)+pos, len, enc); +} + +#define StringIO(obj) get_strio(obj) + +#define STRIO_READABLE FL_USER4 +#define STRIO_WRITABLE FL_USER5 +#define STRIO_READWRITE (STRIO_READABLE|STRIO_WRITABLE) +typedef char strio_flags_check[(STRIO_READABLE/FMODE_READABLE == STRIO_WRITABLE/FMODE_WRITABLE) * 2 - 1]; +#define STRIO_MODE_SET_P(strio, mode) \ + ((RBASIC(strio)->flags & STRIO_##mode) && \ + ((struct StringIO*)DATA_PTR(strio))->flags & FMODE_##mode) +#define CLOSED(strio) (!STRIO_MODE_SET_P(strio, READWRITE)) +#define READABLE(strio) STRIO_MODE_SET_P(strio, READABLE) +#define WRITABLE(strio) STRIO_MODE_SET_P(strio, WRITABLE) + +static VALUE sym_exception; + +static struct StringIO* +readable(VALUE strio) +{ + struct StringIO *ptr = StringIO(strio); + if (!READABLE(strio)) { + rb_raise(rb_eIOError, "not opened for reading"); + } + return ptr; +} + +static struct StringIO* +writable(VALUE strio) +{ + struct StringIO *ptr = StringIO(strio); + if (!WRITABLE(strio)) { + rb_raise(rb_eIOError, "not opened for writing"); + } + if (!OBJ_TAINTED(ptr->string)) { + } + return ptr; +} + +static void +check_modifiable(struct StringIO *ptr) +{ + if (OBJ_FROZEN(ptr->string)) { + rb_raise(rb_eIOError, "not modifiable string"); + } +} + +static VALUE +strio_s_allocate(VALUE klass) +{ + return TypedData_Wrap_Struct(klass, &strio_data_type, 0); +} + +/* + * call-seq: StringIO.new(string=""[, mode]) + * + * Creates new StringIO instance from with _string_ and _mode_. + */ +static VALUE +strio_initialize(int argc, VALUE *argv, VALUE self) +{ + struct StringIO *ptr = check_strio(self); + + if (!ptr) { + DATA_PTR(self) = ptr = strio_alloc(); + } + rb_call_super(0, 0); + strio_init(argc, argv, ptr, self); + return self; +} + +static void +strio_init(int argc, VALUE *argv, struct StringIO *ptr, VALUE self) +{ + VALUE string, mode; + int trunc = 0; + + switch (rb_scan_args(argc, argv, "02", &string, &mode)) { + case 2: + if (FIXNUM_P(mode)) { + int flags = FIX2INT(mode); + ptr->flags = rb_io_oflags_fmode(flags); + trunc = flags & O_TRUNC; + } + else { + const char *m = StringValueCStr(mode); + ptr->flags = rb_io_modestr_fmode(m); + trunc = *m == 'w'; + } + StringValue(string); + if ((ptr->flags & FMODE_WRITABLE) && OBJ_FROZEN(string)) { + errno = EACCES; + rb_sys_fail(0); + } + if (trunc) { + rb_str_resize(string, 0); + } + break; + case 1: + StringValue(string); + ptr->flags = OBJ_FROZEN(string) ? FMODE_READABLE : FMODE_READWRITE; + break; + case 0: + string = rb_enc_str_new("", 0, rb_default_external_encoding()); + ptr->flags = FMODE_READWRITE; + break; + } + ptr->string = string; + ptr->pos = 0; + ptr->lineno = 0; + RBASIC(self)->flags |= (ptr->flags & FMODE_READWRITE) * (STRIO_READABLE / FMODE_READABLE); +} + +static VALUE +strio_finalize(VALUE self) +{ + struct StringIO *ptr = StringIO(self); + ptr->string = Qnil; + ptr->flags &= ~FMODE_READWRITE; + return self; +} + +/* + * call-seq: StringIO.open(string=""[, mode]) {|strio| ...} + * + * Equivalent to StringIO.new except that when it is called with a block, it + * yields with the new instance and closes it, and returns the result which + * returned from the block. + */ +static VALUE +strio_s_open(int argc, VALUE *argv, VALUE klass) +{ + VALUE obj = rb_class_new_instance(argc, argv, klass); + if (!rb_block_given_p()) return obj; + return rb_ensure(rb_yield, obj, strio_finalize, obj); +} + +/* + * Returns +false+. Just for compatibility to IO. + */ +static VALUE +strio_false(VALUE self) +{ + StringIO(self); + return Qfalse; +} + +/* + * Returns +nil+. Just for compatibility to IO. + */ +static VALUE +strio_nil(VALUE self) +{ + StringIO(self); + return Qnil; +} + +/* + * Returns *strio* itself. Just for compatibility to IO. + */ +static VALUE +strio_self(VALUE self) +{ + StringIO(self); + return self; +} + +/* + * Returns 0. Just for compatibility to IO. + */ +static VALUE +strio_0(VALUE self) +{ + StringIO(self); + return INT2FIX(0); +} + +/* + * Returns the argument unchanged. Just for compatibility to IO. + */ +static VALUE +strio_first(VALUE self, VALUE arg) +{ + StringIO(self); + return arg; +} + +/* + * Raises NotImplementedError. + */ +static VALUE +strio_unimpl(int argc, VALUE *argv, VALUE self) +{ + StringIO(self); + rb_notimplement(); + + UNREACHABLE; +} + +/* + * call-seq: strio.string -> string + * + * Returns underlying String object, the subject of IO. + */ +static VALUE +strio_get_string(VALUE self) +{ + return StringIO(self)->string; +} + +/* + * call-seq: + * strio.string = string -> string + * + * Changes underlying String object, the subject of IO. + */ +static VALUE +strio_set_string(VALUE self, VALUE string) +{ + struct StringIO *ptr = StringIO(self); + + rb_io_taint_check(self); + ptr->flags &= ~FMODE_READWRITE; + StringValue(string); + ptr->flags = OBJ_FROZEN(string) ? FMODE_READABLE : FMODE_READWRITE; + ptr->pos = 0; + ptr->lineno = 0; + return ptr->string = string; +} + +/* + * call-seq: + * strio.close -> nil + * + * Closes strio. The *strio* is unavailable for any further data + * operations; an +IOError+ is raised if such an attempt is made. + */ +static VALUE +strio_close(VALUE self) +{ + StringIO(self); + if (CLOSED(self)) { + rb_raise(rb_eIOError, "closed stream"); + } + RBASIC(self)->flags &= ~STRIO_READWRITE; + return Qnil; +} + +/* + * call-seq: + * strio.close_read -> nil + * + * Closes the read end of a StringIO. Will raise an +IOError+ if the + * *strio* is not readable. + */ +static VALUE +strio_close_read(VALUE self) +{ + StringIO(self); + if (!READABLE(self)) { + rb_raise(rb_eIOError, "closing non-duplex IO for reading"); + } + RBASIC(self)->flags &= ~STRIO_READABLE; + return Qnil; +} + +/* + * call-seq: + * strio.close_write -> nil + * + * Closes the write end of a StringIO. Will raise an +IOError+ if the + * *strio* is not writeable. + */ +static VALUE +strio_close_write(VALUE self) +{ + StringIO(self); + if (!WRITABLE(self)) { + rb_raise(rb_eIOError, "closing non-duplex IO for writing"); + } + RBASIC(self)->flags &= ~STRIO_WRITABLE; + return Qnil; +} + +/* + * call-seq: + * strio.closed? -> true or false + * + * Returns +true+ if *strio* is completely closed, +false+ otherwise. + */ +static VALUE +strio_closed(VALUE self) +{ + StringIO(self); + if (!CLOSED(self)) return Qfalse; + return Qtrue; +} + +/* + * call-seq: + * strio.closed_read? -> true or false + * + * Returns +true+ if *strio* is not readable, +false+ otherwise. + */ +static VALUE +strio_closed_read(VALUE self) +{ + StringIO(self); + if (READABLE(self)) return Qfalse; + return Qtrue; +} + +/* + * call-seq: + * strio.closed_write? -> true or false + * + * Returns +true+ if *strio* is not writable, +false+ otherwise. + */ +static VALUE +strio_closed_write(VALUE self) +{ + StringIO(self); + if (WRITABLE(self)) return Qfalse; + return Qtrue; +} + +/* + * call-seq: + * strio.eof -> true or false + * strio.eof? -> true or false + * + * Returns true if *strio* is at end of file. The stringio must be + * opened for reading or an +IOError+ will be raised. + */ +static VALUE +strio_eof(VALUE self) +{ + struct StringIO *ptr = readable(self); + if (ptr->pos < RSTRING_LEN(ptr->string)) return Qfalse; + return Qtrue; +} + +/* :nodoc: */ +static VALUE +strio_copy(VALUE copy, VALUE orig) +{ + struct StringIO *ptr; + + orig = rb_convert_type(orig, T_DATA, "StringIO", "to_strio"); + if (copy == orig) return copy; + ptr = StringIO(orig); + if (check_strio(copy)) { + strio_free(DATA_PTR(copy)); + } + DATA_PTR(copy) = ptr; + OBJ_INFECT(copy, orig); + RBASIC(copy)->flags &= ~STRIO_READWRITE; + RBASIC(copy)->flags |= RBASIC(orig)->flags & STRIO_READWRITE; + ++ptr->count; + return copy; +} + +/* + * call-seq: + * strio.lineno -> integer + * + * Returns the current line number in *strio*. The stringio must be + * opened for reading. +lineno+ counts the number of times +gets+ is + * called, rather than the number of newlines encountered. The two + * values will differ if +gets+ is called with a separator other than + * newline. See also the <code>$.</code> variable. + */ +static VALUE +strio_get_lineno(VALUE self) +{ + return LONG2NUM(StringIO(self)->lineno); +} + +/* + * call-seq: + * strio.lineno = integer -> integer + * + * Manually sets the current line number to the given value. + * <code>$.</code> is updated only on the next read. + */ +static VALUE +strio_set_lineno(VALUE self, VALUE lineno) +{ + StringIO(self)->lineno = NUM2LONG(lineno); + return lineno; +} + +#define strio_binmode strio_self + +#define strio_fcntl strio_unimpl + +#define strio_flush strio_self + +#define strio_fsync strio_0 + +/* + * call-seq: + * strio.reopen(other_StrIO) -> strio + * strio.reopen(string, mode) -> strio + * + * Reinitializes *strio* with the given <i>other_StrIO</i> or _string_ + * and _mode_ (see StringIO#new). + */ +static VALUE +strio_reopen(int argc, VALUE *argv, VALUE self) +{ + rb_io_taint_check(self); + if (argc == 1 && !RB_TYPE_P(*argv, T_STRING)) { + return strio_copy(self, *argv); + } + strio_init(argc, argv, StringIO(self), self); + return self; +} + +/* + * call-seq: + * strio.pos -> integer + * strio.tell -> integer + * + * Returns the current offset (in bytes) of *strio*. + */ +static VALUE +strio_get_pos(VALUE self) +{ + return LONG2NUM(StringIO(self)->pos); +} + +/* + * call-seq: + * strio.pos = integer -> integer + * + * Seeks to the given position (in bytes) in *strio*. + */ +static VALUE +strio_set_pos(VALUE self, VALUE pos) +{ + struct StringIO *ptr = StringIO(self); + long p = NUM2LONG(pos); + if (p < 0) { + error_inval(0); + } + ptr->pos = p; + return pos; +} + +/* + * call-seq: + * strio.rewind -> 0 + * + * Positions *strio* to the beginning of input, resetting + * +lineno+ to zero. + */ +static VALUE +strio_rewind(VALUE self) +{ + struct StringIO *ptr = StringIO(self); + ptr->pos = 0; + ptr->lineno = 0; + return INT2FIX(0); +} + +/* + * call-seq: + * strio.seek(amount, whence=SEEK_SET) -> 0 + * + * Seeks to a given offset _amount_ in the stream according to + * the value of _whence_ (see IO#seek). + */ +static VALUE +strio_seek(int argc, VALUE *argv, VALUE self) +{ + VALUE whence; + struct StringIO *ptr = StringIO(self); + long offset; + + rb_scan_args(argc, argv, "11", NULL, &whence); + offset = NUM2LONG(argv[0]); + if (CLOSED(self)) { + rb_raise(rb_eIOError, "closed stream"); + } + switch (NIL_P(whence) ? 0 : NUM2LONG(whence)) { + case 0: + break; + case 1: + offset += ptr->pos; + break; + case 2: + offset += RSTRING_LEN(ptr->string); + break; + default: + error_inval("invalid whence"); + } + if (offset < 0) { + error_inval(0); + } + ptr->pos = offset; + return INT2FIX(0); +} + +/* + * call-seq: + * strio.sync -> true + * + * Returns +true+ always. + */ +static VALUE +strio_get_sync(VALUE self) +{ + StringIO(self); + return Qtrue; +} + +#define strio_set_sync strio_first + +#define strio_tell strio_get_pos + +/* + * call-seq: + * strio.each_byte {|byte| block } -> strio + * strio.each_byte -> anEnumerator + * + * See IO#each_byte. + */ +static VALUE +strio_each_byte(VALUE self) +{ + struct StringIO *ptr = readable(self); + + RETURN_ENUMERATOR(self, 0, 0); + + while (ptr->pos < RSTRING_LEN(ptr->string)) { + char c = RSTRING_PTR(ptr->string)[ptr->pos++]; + rb_yield(CHR2FIX(c)); + } + return self; +} + +/* + * This is a deprecated alias for #each_byte. + */ +static VALUE +strio_bytes(VALUE self) +{ + rb_warn("StringIO#bytes is deprecated; use #each_byte instead"); + if (!rb_block_given_p()) + return rb_enumeratorize(self, ID2SYM(rb_intern("each_byte")), 0, 0); + return strio_each_byte(self); +} + +/* + * call-seq: + * strio.getc -> string or nil + * + * See IO#getc. + */ +static VALUE +strio_getc(VALUE self) +{ + struct StringIO *ptr = readable(self); + rb_encoding *enc = rb_enc_get(ptr->string); + int len; + char *p; + + if (ptr->pos >= RSTRING_LEN(ptr->string)) { + return Qnil; + } + p = RSTRING_PTR(ptr->string)+ptr->pos; + len = rb_enc_mbclen(p, RSTRING_END(ptr->string), enc); + ptr->pos += len; + return rb_enc_str_new(p, len, rb_enc_get(ptr->string)); +} + +/* + * call-seq: + * strio.getbyte -> fixnum or nil + * + * See IO#getbyte. + */ +static VALUE +strio_getbyte(VALUE self) +{ + struct StringIO *ptr = readable(self); + int c; + if (ptr->pos >= RSTRING_LEN(ptr->string)) { + return Qnil; + } + c = RSTRING_PTR(ptr->string)[ptr->pos++]; + return CHR2FIX(c); +} + +static void +strio_extend(struct StringIO *ptr, long pos, long len) +{ + long olen; + + check_modifiable(ptr); + olen = RSTRING_LEN(ptr->string); + if (pos + len > olen) { + rb_str_resize(ptr->string, pos + len); + if (pos > olen) + MEMZERO(RSTRING_PTR(ptr->string) + olen, char, pos - olen); + } + else { + rb_str_modify(ptr->string); + } +} + +/* + * call-seq: + * strio.ungetc(string) -> nil + * + * Pushes back one character (passed as a parameter) onto *strio* + * such that a subsequent buffered read will return it. There is no + * limitation for multiple pushbacks including pushing back behind the + * beginning of the buffer string. + */ +static VALUE +strio_ungetc(VALUE self, VALUE c) +{ + struct StringIO *ptr = readable(self); + long lpos, clen; + char *p, *pend; + rb_encoding *enc, *enc2; + + if (NIL_P(c)) return Qnil; + check_modifiable(ptr); + if (FIXNUM_P(c)) { + int cc = FIX2INT(c); + char buf[16]; + + enc = rb_enc_get(ptr->string); + rb_enc_mbcput(cc, buf, enc); + c = rb_enc_str_new(buf, rb_enc_codelen(cc, enc), enc); + } + else { + SafeStringValue(c); + enc = rb_enc_get(ptr->string); + enc2 = rb_enc_get(c); + if (enc != enc2 && enc != rb_ascii8bit_encoding()) { + c = rb_str_conv_enc(c, enc2, enc); + } + } + if (RSTRING_LEN(ptr->string) < ptr->pos) { + long len = RSTRING_LEN(ptr->string); + rb_str_resize(ptr->string, ptr->pos - 1); + memset(RSTRING_PTR(ptr->string) + len, 0, ptr->pos - len - 1); + rb_str_concat(ptr->string, c); + ptr->pos--; + } + else { + /* get logical position */ + lpos = 0; p = RSTRING_PTR(ptr->string); pend = p + ptr->pos; + for (;;) { + clen = rb_enc_mbclen(p, pend, enc); + if (p+clen >= pend) break; + p += clen; + lpos++; + } + clen = p - RSTRING_PTR(ptr->string); + rb_str_update(ptr->string, lpos, ptr->pos ? 1 : 0, c); + ptr->pos = clen; + } + + return Qnil; +} + +/* + * call-seq: + * strio.ungetbyte(fixnum) -> nil + * + * See IO#ungetbyte + */ +static VALUE +strio_ungetbyte(VALUE self, VALUE c) +{ + struct StringIO *ptr = readable(self); + char buf[1], *cp = buf; + long pos = ptr->pos, cl = 1; + VALUE str = ptr->string; + + if (NIL_P(c)) return Qnil; + if (FIXNUM_P(c)) { + buf[0] = (char)FIX2INT(c); + } + else { + SafeStringValue(c); + cp = RSTRING_PTR(c); + cl = RSTRING_LEN(c); + if (cl == 0) return Qnil; + } + check_modifiable(ptr); + rb_str_modify(str); + if (cl > pos) { + char *s; + long rest = RSTRING_LEN(str) - pos; + rb_str_resize(str, rest + cl); + s = RSTRING_PTR(str); + memmove(s + cl, s + pos, rest); + pos = 0; + } + else { + pos -= cl; + } + memcpy(RSTRING_PTR(str) + pos, cp, cl); + ptr->pos = pos; + RB_GC_GUARD(c); + return Qnil; +} + +/* + * call-seq: + * strio.readchar -> string + * + * See IO#readchar. + */ +static VALUE +strio_readchar(VALUE self) +{ + VALUE c = rb_funcall2(self, rb_intern("getc"), 0, 0); + if (NIL_P(c)) rb_eof_error(); + return c; +} + +/* + * call-seq: + * strio.readbyte -> fixnum + * + * See IO#readbyte. + */ +static VALUE +strio_readbyte(VALUE self) +{ + VALUE c = rb_funcall2(self, rb_intern("getbyte"), 0, 0); + if (NIL_P(c)) rb_eof_error(); + return c; +} + +/* + * call-seq: + * strio.each_char {|char| block } -> strio + * strio.each_char -> anEnumerator + * + * See IO#each_char. + */ +static VALUE +strio_each_char(VALUE self) +{ + VALUE c; + + RETURN_ENUMERATOR(self, 0, 0); + + while (!NIL_P(c = strio_getc(self))) { + rb_yield(c); + } + return self; +} + +/* + * This is a deprecated alias for <code>each_char</code>. + */ +static VALUE +strio_chars(VALUE self) +{ + rb_warn("StringIO#chars is deprecated; use #each_char instead"); + if (!rb_block_given_p()) + return rb_enumeratorize(self, ID2SYM(rb_intern("each_char")), 0, 0); + return strio_each_char(self); +} + +/* + * call-seq: + * strio.each_codepoint {|c| block } -> strio + * strio.each_codepoint -> anEnumerator + * + * See IO#each_codepoint. + */ +static VALUE +strio_each_codepoint(VALUE self) +{ + struct StringIO *ptr; + rb_encoding *enc; + unsigned int c; + int n; + + RETURN_ENUMERATOR(self, 0, 0); + + ptr = readable(self); + enc = rb_enc_get(ptr->string); + for (;;) { + if (ptr->pos >= RSTRING_LEN(ptr->string)) { + return self; + } + + c = rb_enc_codepoint_len(RSTRING_PTR(ptr->string)+ptr->pos, + RSTRING_END(ptr->string), &n, enc); + rb_yield(UINT2NUM(c)); + ptr->pos += n; + } + return self; +} + +/* + * This is a deprecated alias for <code>each_codepoint</code>. + */ +static VALUE +strio_codepoints(VALUE self) +{ + rb_warn("StringIO#codepoints is deprecated; use #each_codepoint instead"); + if (!rb_block_given_p()) + return rb_enumeratorize(self, ID2SYM(rb_intern("each_codepoint")), 0, 0); + return strio_each_codepoint(self); +} + +/* Boyer-Moore search: copied from regex.c */ +static void +bm_init_skip(long *skip, const char *pat, long m) +{ + int c; + + for (c = 0; c < (1 << CHAR_BIT); c++) { + skip[c] = m; + } + while (--m) { + skip[(unsigned char)*pat++] = m; + } +} + +static long +bm_search(const char *little, long llen, const char *big, long blen, const long *skip) +{ + long i, j, k; + + i = llen - 1; + while (i < blen) { + k = i; + j = llen - 1; + while (j >= 0 && big[k] == little[j]) { + k--; + j--; + } + if (j < 0) return k + 1; + i += skip[(unsigned char)big[i]]; + } + return -1; +} + +static VALUE +strio_getline(int argc, VALUE *argv, struct StringIO *ptr) +{ + const char *s, *e, *p; + long n, limit = 0; + VALUE str, lim; + + rb_scan_args(argc, argv, "02", &str, &lim); + switch (argc) { + case 0: + str = rb_rs; + break; + + case 1: + if (!NIL_P(str) && !RB_TYPE_P(str, T_STRING)) { + VALUE tmp = rb_check_string_type(str); + if (NIL_P(tmp)) { + limit = NUM2LONG(str); + if (limit == 0) return rb_str_new(0,0); + str = rb_rs; + } + else { + str = tmp; + } + } + break; + + case 2: + if (!NIL_P(str)) StringValue(str); + if (!NIL_P(lim)) limit = NUM2LONG(lim); + break; + } + + if (ptr->pos >= (n = RSTRING_LEN(ptr->string))) { + return Qnil; + } + s = RSTRING_PTR(ptr->string); + e = s + RSTRING_LEN(ptr->string); + s += ptr->pos; + if (limit > 0 && s + limit < e) { + e = rb_enc_right_char_head(s, s + limit, e, rb_enc_get(ptr->string)); + } + if (NIL_P(str)) { + str = strio_substr(ptr, ptr->pos, e - s); + } + else if ((n = RSTRING_LEN(str)) == 0) { + p = s; + while (*p == '\n') { + if (++p == e) { + return Qnil; + } + } + s = p; + while ((p = memchr(p, '\n', e - p)) && (p != e)) { + if (*++p == '\n') { + e = p + 1; + break; + } + } + str = strio_substr(ptr, s - RSTRING_PTR(ptr->string), e - s); + } + else if (n == 1) { + if ((p = memchr(s, RSTRING_PTR(str)[0], e - s)) != 0) { + e = p + 1; + } + str = strio_substr(ptr, ptr->pos, e - s); + } + else { + if (n < e - s) { + if (e - s < 1024) { + for (p = s; p + n <= e; ++p) { + if (MEMCMP(p, RSTRING_PTR(str), char, n) == 0) { + e = p + n; + break; + } + } + } + else { + long skip[1 << CHAR_BIT], pos; + p = RSTRING_PTR(str); + bm_init_skip(skip, p, n); + if ((pos = bm_search(p, n, s, e - s, skip)) >= 0) { + e = s + pos + n; + } + } + } + str = strio_substr(ptr, ptr->pos, e - s); + } + ptr->pos = e - RSTRING_PTR(ptr->string); + ptr->lineno++; + return str; +} + +/* + * call-seq: + * strio.gets(sep=$/) -> string or nil + * strio.gets(limit) -> string or nil + * strio.gets(sep, limit) -> string or nil + * + * See IO#gets. + */ +static VALUE +strio_gets(int argc, VALUE *argv, VALUE self) +{ + VALUE str = strio_getline(argc, argv, readable(self)); + + rb_lastline_set(str); + return str; +} + +/* + * call-seq: + * strio.readline(sep=$/) -> string + * strio.readline(limit) -> string or nil + * strio.readline(sep, limit) -> string or nil + * + * See IO#readline. + */ +static VALUE +strio_readline(int argc, VALUE *argv, VALUE self) +{ + VALUE line = rb_funcall2(self, rb_intern("gets"), argc, argv); + if (NIL_P(line)) rb_eof_error(); + return line; +} + +/* + * call-seq: + * strio.each(sep=$/) {|line| block } -> strio + * strio.each(limit) {|line| block } -> strio + * strio.each(sep, limit) {|line| block } -> strio + * strio.each(...) -> anEnumerator + * + * strio.each_line(sep=$/) {|line| block } -> strio + * strio.each_line(limit) {|line| block } -> strio + * strio.each_line(sep,limit) {|line| block } -> strio + * strio.each_line(...) -> anEnumerator + * + * See IO#each. + */ +static VALUE +strio_each(int argc, VALUE *argv, VALUE self) +{ + VALUE line; + + StringIO(self); + RETURN_ENUMERATOR(self, argc, argv); + + if (argc > 0 && !NIL_P(argv[argc-1]) && NIL_P(rb_check_string_type(argv[argc-1])) && + NUM2LONG(argv[argc-1]) == 0) { + rb_raise(rb_eArgError, "invalid limit: 0 for each_line"); + } + + while (!NIL_P(line = strio_getline(argc, argv, readable(self)))) { + rb_yield(line); + } + return self; +} + +/* + * This is a deprecated alias for <code>each_line</code>. + */ +static VALUE +strio_lines(int argc, VALUE *argv, VALUE self) +{ + rb_warn("StringIO#lines is deprecated; use #each_line instead"); + if (!rb_block_given_p()) + return rb_enumeratorize(self, ID2SYM(rb_intern("each_line")), argc, argv); + return strio_each(argc, argv, self); +} + +/* + * call-seq: + * strio.readlines(sep=$/) -> array + * strio.readlines(limit) -> array + * strio.readlines(sep,limit) -> array + * + * See IO#readlines. + */ +static VALUE +strio_readlines(int argc, VALUE *argv, VALUE self) +{ + VALUE ary, line; + + StringIO(self); + ary = rb_ary_new(); + if (argc > 0 && !NIL_P(argv[argc-1]) && NIL_P(rb_check_string_type(argv[argc-1])) && + NUM2LONG(argv[argc-1]) == 0) { + rb_raise(rb_eArgError, "invalid limit: 0 for readlines"); + } + + while (!NIL_P(line = strio_getline(argc, argv, readable(self)))) { + rb_ary_push(ary, line); + } + return ary; +} + +/* + * call-seq: + * strio.write(string) -> integer + * strio.syswrite(string) -> integer + * + * Appends the given string to the underlying buffer string of *strio*. + * The stream must be opened for writing. If the argument is not a + * string, it will be converted to a string using <code>to_s</code>. + * Returns the number of bytes written. See IO#write. + */ +static VALUE +strio_write(VALUE self, VALUE str) +{ + struct StringIO *ptr = writable(self); + long len, olen; + rb_encoding *enc, *enc2; + rb_encoding *const ascii8bit = rb_ascii8bit_encoding(); + + if (!RB_TYPE_P(str, T_STRING)) + str = rb_obj_as_string(str); + enc = rb_enc_get(ptr->string); + enc2 = rb_enc_get(str); + if (enc != enc2 && enc != ascii8bit) { + str = rb_str_conv_enc(str, enc2, enc); + } + len = RSTRING_LEN(str); + if (len == 0) return INT2FIX(0); + check_modifiable(ptr); + olen = RSTRING_LEN(ptr->string); + if (ptr->flags & FMODE_APPEND) { + ptr->pos = olen; + } + if (ptr->pos == olen) { + if (enc == ascii8bit || enc2 == ascii8bit) { + rb_enc_str_buf_cat(ptr->string, RSTRING_PTR(str), len, enc); + OBJ_INFECT(ptr->string, str); + } + else { + rb_str_buf_append(ptr->string, str); + } + } + else { + strio_extend(ptr, ptr->pos, len); + memmove(RSTRING_PTR(ptr->string)+ptr->pos, RSTRING_PTR(str), len); + OBJ_INFECT(ptr->string, str); + } + OBJ_INFECT(ptr->string, self); + RB_GC_GUARD(str); + ptr->pos += len; + return LONG2NUM(len); +} + +/* + * call-seq: + * strio << obj -> strio + * + * See IO#<<. + */ +#define strio_addstr rb_io_addstr + +/* + * call-seq: + * strio.print() -> nil + * strio.print(obj, ...) -> nil + * + * See IO#print. + */ +#define strio_print rb_io_print + +/* + * call-seq: + * strio.printf(format_string [, obj, ...] ) -> nil + * + * See IO#printf. + */ +#define strio_printf rb_io_printf + +/* + * call-seq: + * strio.putc(obj) -> obj + * + * See IO#putc. + */ +static VALUE +strio_putc(VALUE self, VALUE ch) +{ + struct StringIO *ptr = writable(self); + VALUE str; + + check_modifiable(ptr); + if (RB_TYPE_P(ch, T_STRING)) { + str = rb_str_substr(ch, 0, 1); + } + else { + char c = NUM2CHR(ch); + str = rb_str_new(&c, 1); + } + strio_write(self, str); + return ch; +} + +/* + * call-seq: + * strio.puts(obj, ...) -> nil + * + * See IO#puts. + */ +#define strio_puts rb_io_puts + +/* + * call-seq: + * strio.read([length [, outbuf]]) -> string, outbuf, or nil + * + * See IO#read. + */ +static VALUE +strio_read(int argc, VALUE *argv, VALUE self) +{ + struct StringIO *ptr = readable(self); + VALUE str = Qnil; + long len; + int binary = 0; + + switch (argc) { + case 2: + str = argv[1]; + if (!NIL_P(str)) { + StringValue(str); + rb_str_modify(str); + } + case 1: + if (!NIL_P(argv[0])) { + len = NUM2LONG(argv[0]); + if (len < 0) { + rb_raise(rb_eArgError, "negative length %ld given", len); + } + if (len > 0 && ptr->pos >= RSTRING_LEN(ptr->string)) { + if (!NIL_P(str)) rb_str_resize(str, 0); + return Qnil; + } + binary = 1; + break; + } + /* fall through */ + case 0: + len = RSTRING_LEN(ptr->string); + if (len <= ptr->pos) { + if (NIL_P(str)) { + str = rb_str_new(0, 0); + } + else { + rb_str_resize(str, 0); + } + return str; + } + else { + len -= ptr->pos; + } + break; + default: + rb_raise(rb_eArgError, "wrong number of arguments (%d for 0)", argc); + } + if (NIL_P(str)) { + str = strio_substr(ptr, ptr->pos, len); + if (binary) rb_enc_associate(str, rb_ascii8bit_encoding()); + } + else { + long rest = RSTRING_LEN(ptr->string) - ptr->pos; + if (len > rest) len = rest; + rb_str_resize(str, len); + MEMCPY(RSTRING_PTR(str), RSTRING_PTR(ptr->string) + ptr->pos, char, len); + if (binary) + rb_enc_associate(str, rb_ascii8bit_encoding()); + else + rb_enc_copy(str, ptr->string); + } + ptr->pos += RSTRING_LEN(str); + return str; +} + +/* + * call-seq: + * strio.sysread(integer[, outbuf]) -> string + * strio.readpartial(integer[, outbuf]) -> string + * + * Similar to #read, but raises +EOFError+ at end of string instead of + * returning +nil+, as well as IO#sysread does. + */ +static VALUE +strio_sysread(int argc, VALUE *argv, VALUE self) +{ + VALUE val = rb_funcall2(self, rb_intern("read"), argc, argv); + if (NIL_P(val)) { + rb_eof_error(); + } + return val; +} + +/* + * call-seq: + * strio.read_nonblock(integer[, outbuf [, opts]]) -> string + * + * Similar to #read, but raises +EOFError+ at end of string unless the + * +exception: false+ option is passed in. + */ +static VALUE +strio_read_nonblock(int argc, VALUE *argv, VALUE self) +{ + VALUE opts = Qnil, val; + int no_exception = 0; + + rb_scan_args(argc, argv, "11:", NULL, NULL, &opts); + + if (!NIL_P(opts)) { + argc--; + + if (Qfalse == rb_hash_aref(opts, sym_exception)) + no_exception = 1; + } + + val = strio_read(argc, argv, self); + if (NIL_P(val)) { + if (no_exception) + return Qnil; + else + rb_eof_error(); + } + + return val; +} + +#define strio_syswrite rb_io_write + +static VALUE +strio_syswrite_nonblock(int argc, VALUE *argv, VALUE self) +{ + VALUE str; + + rb_scan_args(argc, argv, "10:", &str, NULL); + return strio_syswrite(self, str); +} + +#define strio_isatty strio_false + +#define strio_pid strio_nil + +#define strio_fileno strio_nil + +/* + * call-seq: + * strio.length -> integer + * strio.size -> integer + * + * Returns the size of the buffer string. + */ +static VALUE +strio_size(VALUE self) +{ + VALUE string = StringIO(self)->string; + if (NIL_P(string)) { + rb_raise(rb_eIOError, "not opened"); + } + return ULONG2NUM(RSTRING_LEN(string)); +} + +/* + * call-seq: + * strio.truncate(integer) -> 0 + * + * Truncates the buffer string to at most _integer_ bytes. The *strio* + * must be opened for writing. + */ +static VALUE +strio_truncate(VALUE self, VALUE len) +{ + VALUE string = writable(self)->string; + long l = NUM2LONG(len); + long plen = RSTRING_LEN(string); + if (l < 0) { + error_inval("negative length"); + } + rb_str_resize(string, l); + if (plen < l) { + MEMZERO(RSTRING_PTR(string) + plen, char, l - plen); + } + return len; +} + +/* + * call-seq: + * strio.external_encoding => encoding + * + * Returns the Encoding object that represents the encoding of the file. + * If strio is write mode and no encoding is specified, returns <code>nil</code>. + */ + +static VALUE +strio_external_encoding(VALUE self) +{ + return rb_enc_from_encoding(rb_enc_get(StringIO(self)->string)); +} + +/* + * call-seq: + * strio.internal_encoding => encoding + * + * Returns the Encoding of the internal string if conversion is + * specified. Otherwise returns nil. + */ + +static VALUE +strio_internal_encoding(VALUE self) +{ + return Qnil; +} + +/* + * call-seq: + * strio.set_encoding(ext_enc, [int_enc[, opt]]) => strio + * + * Specify the encoding of the StringIO as <i>ext_enc</i>. + * Use the default external encoding if <i>ext_enc</i> is nil. + * 2nd argument <i>int_enc</i> and optional hash <i>opt</i> argument + * are ignored; they are for API compatibility to IO. + */ + +static VALUE +strio_set_encoding(int argc, VALUE *argv, VALUE self) +{ + rb_encoding* enc; + VALUE str = StringIO(self)->string; + VALUE ext_enc, int_enc, opt; + + argc = rb_scan_args(argc, argv, "11:", &ext_enc, &int_enc, &opt); + + if (NIL_P(ext_enc)) { + enc = rb_default_external_encoding(); + } + else { + enc = rb_to_encoding(ext_enc); + } + rb_enc_associate(str, enc); + return self; +} + +/* + * Pseudo I/O on String object. + * + * Commonly used to simulate `$stdio` or `$stderr` + * + * === Examples + * + * require 'stringio' + * + * io = StringIO.new + * io.puts "Hello World" + * io.string #=> "Hello World" + */ +void +Init_stringio(void) +{ + VALUE StringIO = rb_define_class("StringIO", rb_cData); + + rb_include_module(StringIO, rb_mEnumerable); + rb_define_alloc_func(StringIO, strio_s_allocate); + rb_define_singleton_method(StringIO, "open", strio_s_open, -1); + rb_define_method(StringIO, "initialize", strio_initialize, -1); + rb_define_method(StringIO, "initialize_copy", strio_copy, 1); + rb_define_method(StringIO, "reopen", strio_reopen, -1); + + rb_define_method(StringIO, "string", strio_get_string, 0); + rb_define_method(StringIO, "string=", strio_set_string, 1); + rb_define_method(StringIO, "lineno", strio_get_lineno, 0); + rb_define_method(StringIO, "lineno=", strio_set_lineno, 1); + + + /* call-seq: strio.binmode -> true */ + rb_define_method(StringIO, "binmode", strio_binmode, 0); + rb_define_method(StringIO, "close", strio_close, 0); + rb_define_method(StringIO, "close_read", strio_close_read, 0); + rb_define_method(StringIO, "close_write", strio_close_write, 0); + rb_define_method(StringIO, "closed?", strio_closed, 0); + rb_define_method(StringIO, "closed_read?", strio_closed_read, 0); + rb_define_method(StringIO, "closed_write?", strio_closed_write, 0); + rb_define_method(StringIO, "eof", strio_eof, 0); + rb_define_method(StringIO, "eof?", strio_eof, 0); + /* call-seq: strio.fcntl */ + rb_define_method(StringIO, "fcntl", strio_fcntl, -1); + /* call-seq: strio.flush -> strio */ + rb_define_method(StringIO, "flush", strio_flush, 0); + /* call-seq: strio.fsync -> 0 */ + rb_define_method(StringIO, "fsync", strio_fsync, 0); + rb_define_method(StringIO, "pos", strio_get_pos, 0); + rb_define_method(StringIO, "pos=", strio_set_pos, 1); + rb_define_method(StringIO, "rewind", strio_rewind, 0); + rb_define_method(StringIO, "seek", strio_seek, -1); + rb_define_method(StringIO, "sync", strio_get_sync, 0); + /* call-seq: strio.sync = boolean -> boolean */ + rb_define_method(StringIO, "sync=", strio_set_sync, 1); + rb_define_method(StringIO, "tell", strio_tell, 0); + + rb_define_method(StringIO, "each", strio_each, -1); + rb_define_method(StringIO, "each_line", strio_each, -1); + rb_define_method(StringIO, "lines", strio_lines, -1); + rb_define_method(StringIO, "each_byte", strio_each_byte, 0); + rb_define_method(StringIO, "bytes", strio_bytes, 0); + rb_define_method(StringIO, "each_char", strio_each_char, 0); + rb_define_method(StringIO, "chars", strio_chars, 0); + rb_define_method(StringIO, "each_codepoint", strio_each_codepoint, 0); + rb_define_method(StringIO, "codepoints", strio_codepoints, 0); + rb_define_method(StringIO, "getc", strio_getc, 0); + rb_define_method(StringIO, "ungetc", strio_ungetc, 1); + rb_define_method(StringIO, "ungetbyte", strio_ungetbyte, 1); + rb_define_method(StringIO, "getbyte", strio_getbyte, 0); + rb_define_method(StringIO, "gets", strio_gets, -1); + rb_define_method(StringIO, "readlines", strio_readlines, -1); + rb_define_method(StringIO, "read", strio_read, -1); + + rb_define_method(StringIO, "write", strio_write, 1); + rb_define_method(StringIO, "putc", strio_putc, 1); + + /* + * call-seq: + * strio.isatty -> nil + * strio.tty? -> nil + * + */ + rb_define_method(StringIO, "isatty", strio_isatty, 0); + rb_define_method(StringIO, "tty?", strio_isatty, 0); + + /* call-seq: strio.pid -> nil */ + rb_define_method(StringIO, "pid", strio_pid, 0); + + /* call-seq: strio.fileno -> nil */ + rb_define_method(StringIO, "fileno", strio_fileno, 0); + rb_define_method(StringIO, "size", strio_size, 0); + rb_define_method(StringIO, "length", strio_size, 0); + rb_define_method(StringIO, "truncate", strio_truncate, 1); + + rb_define_method(StringIO, "external_encoding", strio_external_encoding, 0); + rb_define_method(StringIO, "internal_encoding", strio_internal_encoding, 0); + rb_define_method(StringIO, "set_encoding", strio_set_encoding, -1); + + { + VALUE mReadable = rb_define_module_under(rb_cIO, "generic_readable"); + rb_define_method(mReadable, "readchar", strio_readchar, 0); + rb_define_method(mReadable, "readbyte", strio_readbyte, 0); + rb_define_method(mReadable, "readline", strio_readline, -1); + rb_define_method(mReadable, "sysread", strio_sysread, -1); + rb_define_method(mReadable, "readpartial", strio_sysread, -1); + rb_define_method(mReadable, "read_nonblock", strio_read_nonblock, -1); + rb_include_module(StringIO, mReadable); + } + { + VALUE mWritable = rb_define_module_under(rb_cIO, "generic_writable"); + rb_define_method(mWritable, "<<", strio_addstr, 1); + rb_define_method(mWritable, "print", strio_print, -1); + rb_define_method(mWritable, "printf", strio_printf, -1); + rb_define_method(mWritable, "puts", strio_puts, -1); + rb_define_method(mWritable, "syswrite", strio_syswrite, 1); + rb_define_method(mWritable, "write_nonblock", strio_syswrite_nonblock, -1); + rb_include_module(StringIO, mWritable); + } + + sym_exception = ID2SYM(rb_intern("exception")); +} |