1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
#ifndef RBIMPL_INTERN_SPRINTF_H /*-*-C++-*-vi:se ft=cpp:*/
#define RBIMPL_INTERN_SPRINTF_H
/**
* @file
* @author Ruby developers <ruby-core@ruby-lang.org>
* @copyright This file is a part of the programming language Ruby.
* Permission is hereby granted, to either redistribute and/or
* modify this file, provided that the conditions mentioned in the
* file COPYING are met. Consult the file for details.
* @warning Symbols prefixed with either `RBIMPL` or `rbimpl` are
* implementation details. Don't take them as canon. They could
* rapidly appear then vanish. The name (path) of this header file
* is also an implementation detail. Do not expect it to persist
* at the place it is now. Developers are free to move it anywhere
* anytime at will.
* @note To ruby-core: remember that this header can be possibly
* recursively included from extension libraries written in C++.
* Do not expect for instance `__VA_ARGS__` is always available.
* We assume C99 for ruby itself but we don't assume languages of
* extension libraries. They could be written in C++98.
* @brief Our own private `printf(3)`.
*/
#include "ruby/internal/attr/format.h"
#include "ruby/internal/attr/nonnull.h"
#include "ruby/internal/dllexport.h"
#include "ruby/internal/value.h"
RBIMPL_SYMBOL_EXPORT_BEGIN()
/* sprintf.c */
/**
* Identical to rb_str_format(), except how the arguments are arranged.
*
* @param[in] argc Number of objects of `argv`.
* @param[in] argv A format string, followed by its arguments.
* @return A rendered new instance of ::rb_cString.
*
* @internal
*
* You can safely pass NULL to `argv`. Doesn't make any sense though.
*/
VALUE rb_f_sprintf(int argc, const VALUE *argv);
RBIMPL_ATTR_NONNULL((1))
RBIMPL_ATTR_FORMAT(RBIMPL_PRINTF_FORMAT, 1, 2)
/**
* Ruby's extended `sprintf(3)`. We ended up reinventing the entire `printf`
* business because we don't want to depend on locales. OS-provided `printf`
* routines might or might not, which caused instabilities of the result
* strings.
*
* The format sequence is a mixture of format specifiers and other verbatim
* contents. Each format specifier starts with a `%`, and has the following
* structure:
*
* ```
* %[flags][width][.precision][length]conversion
* ```
*
* This function supports flags of ` `, `#`, `+`, `-`, `0`, width of
* non-negative decimal integer and `*`, precision of non-negative decimal
* integers and `*`, length of `L`, `h`, `t`, `z`, `l`, `ll`, `q`, conversions
* of `A`, `D`, `E`, `G`, `O`, `U`, `X`, `a`, `c`, `d`, `e`, `f`, `g`, `i`,
* `n`, `o`, `p`, `s`, `u`, `x`, and `%`. In case of `_WIN32` it also supports
* `I`. And additionally, it supports magical `PRIsVALUE` macro that can
* stringise arbitrary Ruby objects:
*
* ```CXX
* rb_sprintf("|%"PRIsVALUE"|", RUBY_Qtrue); // => "|true|"
* rb_sprintf("%+"PRIsVALUE, rb_stdin); // => "#<IO:<STDIN>>"
* ```
*
* @param[in] fmt A `printf`-like format specifier.
* @param[in] ... Variadic number of contents to format.
* @return A rendered new instance of ::rb_cString.
*
* @internal
*
* :FIXME: We can improve this document.
*/
VALUE rb_sprintf(const char *fmt, ...);
RBIMPL_ATTR_NONNULL((1))
RBIMPL_ATTR_FORMAT(RBIMPL_PRINTF_FORMAT, 1, 0)
/**
* Identical to rb_sprintf(), except it takes a `va_list`.
*
* @param[in] fmt A `printf`-like format specifier.
* @param[in] ap Contents to format.
* @return A rendered new instance of ::rb_cString.
*/
VALUE rb_vsprintf(const char *fmt, va_list ap);
RBIMPL_ATTR_NONNULL((2))
RBIMPL_ATTR_FORMAT(RBIMPL_PRINTF_FORMAT, 2, 3)
/**
* Identical to rb_sprintf(), except it renders the output to the specified
* object rather than creating a new one.
*
* @param[out] dst String to modify.
* @param[in] fmt A `printf`-like format specifier.
* @param[in] ... Variadic number of contents to format.
* @exception rb_eTypeError `dst` is not a String.
* @return Passed `dst`.
* @post `dst` has the rendered output appended to its end.
*/
VALUE rb_str_catf(VALUE dst, const char *fmt, ...);
RBIMPL_ATTR_NONNULL((2))
RBIMPL_ATTR_FORMAT(RBIMPL_PRINTF_FORMAT, 2, 0)
/**
* Identical to rb_str_catf(), except it takes a `va_list`. It can also be
* seen as a routine identical to rb_vsprintf(), except it renders the output
* to the specified object rather than creating a new one.
*
* @param[out] dst String to modify.
* @param[in] fmt A `printf`-like format specifier.
* @param[in] ap Contents to format.
* @exception rb_eTypeError `dst` is not a String.
* @return Passed `dst`.
* @post `dst` has the rendered output appended to its end.
*/
VALUE rb_str_vcatf(VALUE dst, const char *fmt, va_list ap);
/**
* Formats a string.
*
* Returns the string resulting from applying `fmt` to `argv`. The format
* sequence is a mixture of format specifiers and other verbatim contents.
* Each format specifier starts with a `%`, and has the following structure:
*
* ```
* %[flags][width][.precision]type
* ```
*
* ... which is different from that of rb_sprintf(). Because ruby has no
* `short` or `long`, there is no way to specify a "length" of an argument.
*
* This function supports flags of ` `, `#`, `+`, `-`, `<>`, `{}`, with of
* non-negative decimal integer and `$`, `*`, precision of non-negative decimal
* integer and `$`, `*`, type of `A`, `B`, `E`, `G`, `X`, `a`, `b`, `c`, `d`,
* `e`, `f`, `g`, `i`, `o`, `p`, `s`, `u`, `x`, `%`. This list is also
* (largely the same but) not identical to that of rb_sprintf().
*
* @param[in] argc Number of objects in `argv`.
* @param[in] argv Format arguments.
* @param[in] fmt A printf-like format specifier.
* @exception rb_eTypeError `fmt` is not a string.
* @exception rb_eArgError Failed to parse `fmt`.
* @return A rendered new instance of ::rb_cString.
* @note Everything it takes must be Ruby objects.
*
*/
VALUE rb_str_format(int argc, const VALUE *argv, VALUE fmt);
RBIMPL_SYMBOL_EXPORT_END()
#endif /* RBIMPL_INTERN_SPRINTF_H */
|
