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b1a5146ea8f8665df5edf2b26dcadc028d7929f7
mruby-mruby/src/sprintf.c
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mattn b1a5146ea8 Pluggable Regexp
2013-02-15 04:38:27 +09:00

1096 lines
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/*
** sprintf.c - Kernel.#sprintf
**
** See Copyright Notice in mruby.h
*/
#include "mruby.h"
#ifdef ENABLE_SPRINTF
#include <stdio.h>
#include <string.h>
#include "mruby/string.h"
#include "mruby/hash.h"
#include "mruby/numeric.h"
#include <math.h>
#include <ctype.h>
#ifdef _MSC_VER
#include <float.h>
#endif
#ifdef HAVE_IEEEFP_H
#include <ieeefp.h>
#endif
#define BIT_DIGITS(N) (((N)*146)/485 + 1) /* log2(10) =~ 146/485 */
#define BITSPERDIG (sizeof(mrb_int)*CHAR_BIT)
#define EXTENDSIGN(n, l) (((~0 << (n)) >> (((n)*(l)) % BITSPERDIG)) & ~(~0 << (n)))
static void fmt_setup(char*,size_t,int,int,int,int);
static char*
remove_sign_bits(char *str, int base)
{
char *t;
t = str;
if (base == 16) {
while (*t == 'f') {
t++;
}
}
else if (base == 8) {
*t |= EXTENDSIGN(3, strlen(t));
while (*t == '7') {
t++;
}
}
else if (base == 2) {
while (*t == '1') {
t++;
}
}
return t;
}
static char
sign_bits(int base, const char *p)
{
char c;
switch (base) {
case 16:
if (*p == 'X') c = 'F';
else c = 'f';
break;
case 8:
c = '7'; break;
case 2:
c = '1'; break;
default:
c = '.'; break;
}
return c;
}
static mrb_value
mrb_fix2binstr(mrb_state *mrb, mrb_value x, int base)
{
char buf[64], *b = buf + sizeof buf;
unsigned long val = mrb_fixnum(x);
char d;
if (base != 2) {
mrb_raisef(mrb, E_ARGUMENT_ERROR, "invalid radix %d", base);
}
if (val >= (1 << 10))
val &= 0x3ff;
if (val == 0) {
return mrb_str_new(mrb, "0", 1);
}
*--b = '\0';
do {
*--b = mrb_digitmap[(int)(val % base)];
} while (val /= base);
if (mrb_fixnum(x) < 0) {
b = remove_sign_bits(b, base);
switch (base) {
case 16: d = 'f'; break;
case 8: d = '7'; break;
case 2: d = '1'; break;
default: d = 0; break;
}
if (d && *b != d) {
*--b = d;
}
}
return mrb_str_new2(mrb, b);
}
#define FNONE 0
#define FSHARP 1
#define FMINUS 2
#define FPLUS 4
#define FZERO 8
#define FSPACE 16
#define FWIDTH 32
#define FPREC 64
#define FPREC0 128
#define CHECK(l) do {\
/* int cr = ENC_CODERANGE(result);*/\
while (blen + (l) >= bsiz) {\
bsiz*=2;\
}\
mrb_str_resize(mrb, result, bsiz);\
/* ENC_CODERANGE_SET(result, cr);*/\
buf = RSTRING_PTR(result);\
} while (0)
#define PUSH(s, l) do { \
CHECK(l);\
memcpy(&buf[blen], s, l);\
blen += (l);\
} while (0)
#define FILL(c, l) do { \
CHECK(l);\
memset(&buf[blen], c, l);\
blen += (l);\
} while (0)
#define GETARG() (!mrb_undef_p(nextvalue) ? nextvalue : \
posarg == -1 ? \
(mrb_raisef(mrb, E_ARGUMENT_ERROR, "unnumbered(%d) mixed with numbered", nextarg), mrb_undef_value()) : \
posarg == -2 ? \
(mrb_raisef(mrb, E_ARGUMENT_ERROR, "unnumbered(%d) mixed with named", nextarg), mrb_undef_value()) : \
(posarg = nextarg++, GETNTHARG(posarg)))
#define GETPOSARG(n) (posarg > 0 ? \
(mrb_raisef(mrb, E_ARGUMENT_ERROR, "numbered(%d) after unnumbered(%d)", n, posarg), mrb_undef_value()) : \
posarg == -2 ? \
(mrb_raisef(mrb, E_ARGUMENT_ERROR, "numbered(%d) after named", n), mrb_undef_value()) : \
((n < 1) ? \
(mrb_raisef(mrb, E_ARGUMENT_ERROR, "invalid index - %d$", n), mrb_undef_value()) : \
(posarg = -1, GETNTHARG(n))))
#define GETNTHARG(nth) \
((nth >= argc) ? (mrb_raise(mrb, E_ARGUMENT_ERROR, "too few arguments"), mrb_undef_value()) : argv[nth])
#define GETNAMEARG(id, name, len) ( \
posarg > 0 ? \
(mrb_raisef(mrb, E_ARGUMENT_ERROR, "named%.*s after unnumbered(%d)", (len), (name), posarg), mrb_undef_value()) : \
posarg == -1 ? \
(mrb_raisef(mrb, E_ARGUMENT_ERROR, "named%.*s after numbered", (len), (name)), mrb_undef_value()) : \
(posarg = -2, mrb_hash_fetch(mrb, get_hash(mrb, &hash, argc, argv), id, mrb_undef_value())))
#define GETNUM(n, val) \
for (; p < end && ISDIGIT(*p); p++) {\
int next_n = 10 * n + (*p - '0'); \
if (next_n / 10 != n) {\
mrb_raise(mrb, E_ARGUMENT_ERROR, #val " too big"); \
} \
n = next_n; \
} \
if (p >= end) { \
mrb_raise(mrb, E_ARGUMENT_ERROR, "malformed format string - %*[0-9]"); \
}
#define GETASTER(num) do { \
t = p++; \
n = 0; \
GETNUM(n, val); \
if (*p == '$') { \
tmp = GETPOSARG(n); \
} \
else { \
tmp = GETARG(); \
p = t; \
} \
num = mrb_fixnum(tmp); \
} while (0)
static mrb_value
get_hash(mrb_state *mrb, mrb_value *hash, int argc, const mrb_value *argv)
{
mrb_value tmp;
if (!mrb_undef_p(*hash)) return *hash;
if (argc != 2) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "one hash required");
}
tmp = mrb_check_convert_type(mrb, argv[1], MRB_TT_HASH, "Hash", "to_hash");
if (mrb_nil_p(tmp)) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "one hash required");
}
return (*hash = tmp);
}
/*
* call-seq:
* format(format_string [, arguments...] ) -> string
* sprintf(format_string [, arguments...] ) -> string
*
* Returns the string resulting from applying <i>format_string</i> to
* any additional arguments. Within the format string, any characters
* other than format sequences are copied to the result.
*
* The syntax of a format sequence is follows.
*
* %[flags][width][.precision]type
*
* A format
* sequence consists of a percent sign, followed by optional flags,
* width, and precision indicators, then terminated with a field type
* character. The field type controls how the corresponding
* <code>sprintf</code> argument is to be interpreted, while the flags
* modify that interpretation.
*
* The field type characters are:
*
* Field | Integer Format
* ------+--------------------------------------------------------------
* b | Convert argument as a binary number.
* | Negative numbers will be displayed as a two's complement
* | prefixed with `..1'.
* B | Equivalent to `b', but uses an uppercase 0B for prefix
* | in the alternative format by #.
* d | Convert argument as a decimal number.
* i | Identical to `d'.
* o | Convert argument as an octal number.
* | Negative numbers will be displayed as a two's complement
* | prefixed with `..7'.
* u | Identical to `d'.
* x | Convert argument as a hexadecimal number.
* | Negative numbers will be displayed as a two's complement
* | prefixed with `..f' (representing an infinite string of
* | leading 'ff's).
* X | Equivalent to `x', but uses uppercase letters.
*
* Field | Float Format
* ------+--------------------------------------------------------------
* e | Convert floating point argument into exponential notation
* | with one digit before the decimal point as [-]d.dddddde[+-]dd.
* | The precision specifies the number of digits after the decimal
* | point (defaulting to six).
* E | Equivalent to `e', but uses an uppercase E to indicate
* | the exponent.
* f | Convert floating point argument as [-]ddd.dddddd,
* | where the precision specifies the number of digits after
* | the decimal point.
* g | Convert a floating point number using exponential form
* | if the exponent is less than -4 or greater than or
* | equal to the precision, or in dd.dddd form otherwise.
* | The precision specifies the number of significant digits.
* G | Equivalent to `g', but use an uppercase `E' in exponent form.
* a | Convert floating point argument as [-]0xh.hhhhp[+-]dd,
* | which is consisted from optional sign, "0x", fraction part
* | as hexadecimal, "p", and exponential part as decimal.
* A | Equivalent to `a', but use uppercase `X' and `P'.
*
* Field | Other Format
* ------+--------------------------------------------------------------
* c | Argument is the numeric code for a single character or
* | a single character string itself.
* p | The valuing of argument.inspect.
* s | Argument is a string to be substituted. If the format
* | sequence contains a precision, at most that many characters
* | will be copied.
* % | A percent sign itself will be displayed. No argument taken.
*
* The flags modifies the behavior of the formats.
* The flag characters are:
*
* Flag | Applies to | Meaning
* ---------+---------------+-----------------------------------------
* space | bBdiouxX | Leave a space at the start of
* | aAeEfgG | non-negative numbers.
* | (numeric fmt) | For `o', `x', `X', `b' and `B', use
* | | a minus sign with absolute value for
* | | negative values.
* ---------+---------------+-----------------------------------------
* (digit)$ | all | Specifies the absolute argument number
* | | for this field. Absolute and relative
* | | argument numbers cannot be mixed in a
* | | sprintf string.
* ---------+---------------+-----------------------------------------
* # | bBoxX | Use an alternative format.
* | aAeEfgG | For the conversions `o', increase the precision
* | | until the first digit will be `0' if
* | | it is not formatted as complements.
* | | For the conversions `x', `X', `b' and `B'
* | | on non-zero, prefix the result with ``0x'',
* | | ``0X'', ``0b'' and ``0B'', respectively.
* | | For `a', `A', `e', `E', `f', `g', and 'G',
* | | force a decimal point to be added,
* | | even if no digits follow.
* | | For `g' and 'G', do not remove trailing zeros.
* ---------+---------------+-----------------------------------------
* + | bBdiouxX | Add a leading plus sign to non-negative
* | aAeEfgG | numbers.
* | (numeric fmt) | For `o', `x', `X', `b' and `B', use
* | | a minus sign with absolute value for
* | | negative values.
* ---------+---------------+-----------------------------------------
* - | all | Left-justify the result of this conversion.
* ---------+---------------+-----------------------------------------
* 0 (zero) | bBdiouxX | Pad with zeros, not spaces.
* | aAeEfgG | For `o', `x', `X', `b' and `B', radix-1
* | (numeric fmt) | is used for negative numbers formatted as
* | | complements.
* ---------+---------------+-----------------------------------------
* * | all | Use the next argument as the field width.
* | | If negative, left-justify the result. If the
* | | asterisk is followed by a number and a dollar
* | | sign, use the indicated argument as the width.
*
* Examples of flags:
*
* # `+' and space flag specifies the sign of non-negative numbers.
* sprintf("%d", 123) #=> "123"
* sprintf("%+d", 123) #=> "+123"
* sprintf("% d", 123) #=> " 123"
*
* # `#' flag for `o' increases number of digits to show `0'.
* # `+' and space flag changes format of negative numbers.
* sprintf("%o", 123) #=> "173"
* sprintf("%#o", 123) #=> "0173"
* sprintf("%+o", -123) #=> "-173"
* sprintf("%o", -123) #=> "..7605"
* sprintf("%#o", -123) #=> "..7605"
*
* # `#' flag for `x' add a prefix `0x' for non-zero numbers.
* # `+' and space flag disables complements for negative numbers.
* sprintf("%x", 123) #=> "7b"
* sprintf("%#x", 123) #=> "0x7b"
* sprintf("%+x", -123) #=> "-7b"
* sprintf("%x", -123) #=> "..f85"
* sprintf("%#x", -123) #=> "0x..f85"
* sprintf("%#x", 0) #=> "0"
*
* # `#' for `X' uses the prefix `0X'.
* sprintf("%X", 123) #=> "7B"
* sprintf("%#X", 123) #=> "0X7B"
*
* # `#' flag for `b' add a prefix `0b' for non-zero numbers.
* # `+' and space flag disables complements for negative numbers.
* sprintf("%b", 123) #=> "1111011"
* sprintf("%#b", 123) #=> "0b1111011"
* sprintf("%+b", -123) #=> "-1111011"
* sprintf("%b", -123) #=> "..10000101"
* sprintf("%#b", -123) #=> "0b..10000101"
* sprintf("%#b", 0) #=> "0"
*
* # `#' for `B' uses the prefix `0B'.
* sprintf("%B", 123) #=> "1111011"
* sprintf("%#B", 123) #=> "0B1111011"
*
* # `#' for `e' forces to show the decimal point.
* sprintf("%.0e", 1) #=> "1e+00"
* sprintf("%#.0e", 1) #=> "1.e+00"
*
* # `#' for `f' forces to show the decimal point.
* sprintf("%.0f", 1234) #=> "1234"
* sprintf("%#.0f", 1234) #=> "1234."
*
* # `#' for `g' forces to show the decimal point.
* # It also disables stripping lowest zeros.
* sprintf("%g", 123.4) #=> "123.4"
* sprintf("%#g", 123.4) #=> "123.400"
* sprintf("%g", 123456) #=> "123456"
* sprintf("%#g", 123456) #=> "123456."
*
* The field width is an optional integer, followed optionally by a
* period and a precision. The width specifies the minimum number of
* characters that will be written to the result for this field.
*
* Examples of width:
*
* # padding is done by spaces, width=20
* # 0 or radix-1. <------------------>
* sprintf("%20d", 123) #=> " 123"
* sprintf("%+20d", 123) #=> " +123"
* sprintf("%020d", 123) #=> "00000000000000000123"
* sprintf("%+020d", 123) #=> "+0000000000000000123"
* sprintf("% 020d", 123) #=> " 0000000000000000123"
* sprintf("%-20d", 123) #=> "123 "
* sprintf("%-+20d", 123) #=> "+123 "
* sprintf("%- 20d", 123) #=> " 123 "
* sprintf("%020x", -123) #=> "..ffffffffffffffff85"
*
* For
* numeric fields, the precision controls the number of decimal places
* displayed. For string fields, the precision determines the maximum
* number of characters to be copied from the string. (Thus, the format
* sequence <code>%10.10s</code> will always contribute exactly ten
* characters to the result.)
*
* Examples of precisions:
*
* # precision for `d', 'o', 'x' and 'b' is
* # minimum number of digits <------>
* sprintf("%20.8d", 123) #=> " 00000123"
* sprintf("%20.8o", 123) #=> " 00000173"
* sprintf("%20.8x", 123) #=> " 0000007b"
* sprintf("%20.8b", 123) #=> " 01111011"
* sprintf("%20.8d", -123) #=> " -00000123"
* sprintf("%20.8o", -123) #=> " ..777605"
* sprintf("%20.8x", -123) #=> " ..ffff85"
* sprintf("%20.8b", -11) #=> " ..110101"
*
* # "0x" and "0b" for `#x' and `#b' is not counted for
* # precision but "0" for `#o' is counted. <------>
* sprintf("%#20.8d", 123) #=> " 00000123"
* sprintf("%#20.8o", 123) #=> " 00000173"
* sprintf("%#20.8x", 123) #=> " 0x0000007b"
* sprintf("%#20.8b", 123) #=> " 0b01111011"
* sprintf("%#20.8d", -123) #=> " -00000123"
* sprintf("%#20.8o", -123) #=> " ..777605"
* sprintf("%#20.8x", -123) #=> " 0x..ffff85"
* sprintf("%#20.8b", -11) #=> " 0b..110101"
*
* # precision for `e' is number of
* # digits after the decimal point <------>
* sprintf("%20.8e", 1234.56789) #=> " 1.23456789e+03"
*
* # precision for `f' is number of
* # digits after the decimal point <------>
* sprintf("%20.8f", 1234.56789) #=> " 1234.56789000"
*
* # precision for `g' is number of
* # significant digits <------->
* sprintf("%20.8g", 1234.56789) #=> " 1234.5679"
*
* # <------->
* sprintf("%20.8g", 123456789) #=> " 1.2345679e+08"
*
* # precision for `s' is
* # maximum number of characters <------>
* sprintf("%20.8s", "string test") #=> " string t"
*
* Examples:
*
* sprintf("%d %04x", 123, 123) #=> "123 007b"
* sprintf("%08b '%4s'", 123, 123) #=> "01111011 ' 123'"
* sprintf("%1$*2$s %2$d %1$s", "hello", 8) #=> " hello 8 hello"
* sprintf("%1$*2$s %2$d", "hello", -8) #=> "hello -8"
* sprintf("%+g:% g:%-g", 1.23, 1.23, 1.23) #=> "+1.23: 1.23:1.23"
* sprintf("%u", -123) #=> "-123"
*
* For more complex formatting, Ruby supports a reference by name.
* %<name>s style uses format style, but %{name} style doesn't.
*
* Exapmles:
* sprintf("%<foo>d : %<bar>f", { :foo => 1, :bar => 2 })
* #=> 1 : 2.000000
* sprintf("%{foo}f", { :foo => 1 })
* # => "1f"
*/
mrb_value
mrb_f_sprintf(mrb_state *mrb, mrb_value obj)
{
int argc;
mrb_value *argv;
mrb_get_args(mrb, "*", &argv, &argc);
if (argc <= 0) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "too few arguments");
return mrb_nil_value();
}
else {
return mrb_str_format(mrb, argc - 1, argv + 1, argv[0]);
}
}
mrb_value
mrb_str_format(mrb_state *mrb, int argc, const mrb_value *argv, mrb_value fmt)
{
const char *p, *end;
char *buf;
long blen, bsiz;
mrb_value result;
int n;
int width, prec, flags = FNONE;
int nextarg = 1;
int posarg = 0;
mrb_value nextvalue;
mrb_value tmp;
mrb_value str;
mrb_value hash = mrb_undef_value();
#define CHECK_FOR_WIDTH(f) \
if ((f) & FWIDTH) { \
mrb_raise(mrb, E_ARGUMENT_ERROR, "width given twice"); \
} \
if ((f) & FPREC0) { \
mrb_raise(mrb, E_ARGUMENT_ERROR, "width after precision"); \
}
#define CHECK_FOR_FLAGS(f) \
if ((f) & FWIDTH) { \
mrb_raise(mrb, E_ARGUMENT_ERROR, "flag after width"); \
} \
if ((f) & FPREC0) { \
mrb_raise(mrb, E_ARGUMENT_ERROR, "flag after precision"); \
}
++argc;
--argv;
mrb_string_value(mrb, &fmt);
p = RSTRING_PTR(fmt);
end = p + RSTRING_LEN(fmt);
blen = 0;
bsiz = 120;
result = mrb_str_buf_new(mrb, bsiz);
buf = RSTRING_PTR(result);
memset(buf, 0, bsiz);
for (; p < end; p++) {
const char *t;
mrb_sym id = 0;
for (t = p; t < end && *t != '%'; t++) ;
PUSH(p, t - p);
if (t >= end)
goto sprint_exit; /* end of fmt string */
p = t + 1; /* skip `%' */
width = prec = -1;
nextvalue = mrb_undef_value();
retry:
switch (*p) {
default:
mrb_raisef(mrb, E_ARGUMENT_ERROR, "malformed format string - %%%c", *p);
break;
case ' ':
CHECK_FOR_FLAGS(flags);
flags |= FSPACE;
p++;
goto retry;
case '#':
CHECK_FOR_FLAGS(flags);
flags |= FSHARP;
p++;
goto retry;
case '+':
CHECK_FOR_FLAGS(flags);
flags |= FPLUS;
p++;
goto retry;
case '-':
CHECK_FOR_FLAGS(flags);
flags |= FMINUS;
p++;
goto retry;
case '0':
CHECK_FOR_FLAGS(flags);
flags |= FZERO;
p++;
goto retry;
case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
n = 0;
GETNUM(n, width);
if (*p == '$') {
if (!mrb_undef_p(nextvalue)) {
mrb_raisef(mrb, E_ARGUMENT_ERROR, "value given twice - %d$", n);
}
nextvalue = GETPOSARG(n);
p++;
goto retry;
}
CHECK_FOR_WIDTH(flags);
width = n;
flags |= FWIDTH;
goto retry;
case '<':
case '{': {
const char *start = p;
char term = (*p == '<') ? '>' : '}';
mrb_value symname;
for (; p < end && *p != term; )
p++;
if (id) {
mrb_raisef(mrb, E_ARGUMENT_ERROR, "name%.*s after <%s>",
(int)(p - start + 1), start, mrb_sym2name(mrb, id));
}
symname = mrb_str_new(mrb, start + 1, p - start - 1);
id = mrb_intern_str(mrb, symname);
nextvalue = GETNAMEARG(mrb_symbol_value(id), start, (int)(p - start + 1));
if (mrb_undef_p(nextvalue)) {
mrb_raisef(mrb, E_KEY_ERROR, "key%.*s not found", (int)(p - start + 1), start);
}
if (term == '}') goto format_s;
p++;
goto retry;
}
case '*':
CHECK_FOR_WIDTH(flags);
flags |= FWIDTH;
GETASTER(width);
if (width < 0) {
flags |= FMINUS;
width = -width;
}
p++;
goto retry;
case '.':
if (flags & FPREC0) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "precision given twice");
}
flags |= FPREC|FPREC0;
prec = 0;
p++;
if (*p == '*') {
GETASTER(prec);
if (prec < 0) { /* ignore negative precision */
flags &= ~FPREC;
}
p++;
goto retry;
}
GETNUM(prec, precision);
goto retry;
case '\n':
case '\0':
p--;
case '%':
if (flags != FNONE) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "invalid format character - %");
}
PUSH("%", 1);
break;
case 'c': {
mrb_value val = GETARG();
mrb_value tmp;
unsigned int c;
tmp = mrb_check_string_type(mrb, val);
if (!mrb_nil_p(tmp)) {
if (RSTRING_LEN(tmp) != 1 ) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "%c requires a character");
}
c = RSTRING_PTR(tmp)[0];
n = 1;
}
else {
c = mrb_fixnum(val);
n = 1;
}
if (n <= 0) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "invalid character");
}
if (!(flags & FWIDTH)) {
CHECK(n);
buf[blen] = c;
blen += n;
}
else if ((flags & FMINUS)) {
CHECK(n);
buf[blen] = c;
blen += n;
FILL(' ', width-1);
}
else {
FILL(' ', width-1);
CHECK(n);
buf[blen] = c;
blen += n;
}
}
break;
case 's':
case 'p':
format_s:
{
mrb_value arg = GETARG();
long len, slen;
if (*p == 'p') arg = mrb_inspect(mrb, arg);
str = mrb_obj_as_string(mrb, arg);
len = RSTRING_LEN(str);
RSTRING_LEN(result) = blen;
if (flags&(FPREC|FWIDTH)) {
slen = RSTRING_LEN(str);
if (slen < 0) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "invalid mbstring sequence");
}
if ((flags&FPREC) && (prec < slen)) {
char *p = RSTRING_PTR(str) + prec;
slen = prec;
len = p - RSTRING_PTR(str);
}
/* need to adjust multi-byte string pos */
if ((flags&FWIDTH) && (width > slen)) {
width -= (int)slen;
if (!(flags&FMINUS)) {
CHECK(width);
while (width--) {
buf[blen++] = ' ';
}
}
CHECK(len);
memcpy(&buf[blen], RSTRING_PTR(str), len);
blen += len;
if (flags&FMINUS) {
CHECK(width);
while (width--) {
buf[blen++] = ' ';
}
}
break;
}
}
PUSH(RSTRING_PTR(str), len);
}
break;
case 'd':
case 'i':
case 'o':
case 'x':
case 'X':
case 'b':
case 'B':
case 'u': {
mrb_value val = GETARG();
char fbuf[32], nbuf[64], *s;
const char *prefix = 0;
int sign = 0, dots = 0;
char sc = 0;
long v = 0, org_v = 0;
int base;
int len;
switch (*p) {
case 'd':
case 'i':
case 'u':
sign = 1; break;
case 'o':
case 'x':
case 'X':
case 'b':
case 'B':
if (flags&(FPLUS|FSPACE)) sign = 1;
break;
default:
break;
}
if (flags & FSHARP) {
switch (*p) {
case 'o': prefix = "0"; break;
case 'x': prefix = "0x"; break;
case 'X': prefix = "0X"; break;
case 'b': prefix = "0b"; break;
case 'B': prefix = "0B"; break;
default: break;
}
}
bin_retry:
switch (mrb_type(val)) {
case MRB_TT_FLOAT:
if (FIXABLE(mrb_float(val))) {
val = mrb_fixnum_value((mrb_int)mrb_float(val));
goto bin_retry;
}
val = mrb_flt2big(mrb, mrb_float(val));
if (mrb_fixnum_p(val)) goto bin_retry;
break;
case MRB_TT_STRING:
val = mrb_str_to_inum(mrb, val, 0, TRUE);
goto bin_retry;
case MRB_TT_FIXNUM:
v = (long)mrb_fixnum(val);
break;
default:
val = mrb_Integer(mrb, val);
goto bin_retry;
}
switch (*p) {
case 'o':
base = 8; break;
case 'x':
case 'X':
base = 16; break;
case 'b':
case 'B':
base = 2; break;
case 'u':
case 'd':
case 'i':
default:
base = 10; break;
}
if (base == 2) {
org_v = v;
if ( v < 0 && !sign ) {
val = mrb_fix2binstr(mrb, mrb_fixnum_value(v), base);
dots = 1;
}
else {
val = mrb_fix2str(mrb, mrb_fixnum_value(v), base);
}
v = mrb_fixnum(mrb_str_to_inum(mrb, val, 10, 0/*Qfalse*/));
}
if (sign) {
char c = *p;
if (c == 'i') c = 'd'; /* %d and %i are identical */
if (base == 2) c = 'd';
if (v < 0) {
v = -v;
sc = '-';
width--;
}
else if (flags & FPLUS) {
sc = '+';
width--;
}
else if (flags & FSPACE) {
sc = ' ';
width--;
}
snprintf(fbuf, sizeof(fbuf), "%%l%c", c);
snprintf(nbuf, sizeof(nbuf), fbuf, v);
s = nbuf;
}
else {
char c = *p;
if (c == 'X') c = 'x';
if (base == 2) c = 'd';
s = nbuf;
if (v < 0) {
dots = 1;
}
snprintf(fbuf, sizeof(fbuf), "%%l%c", c);
snprintf(++s, sizeof(nbuf) - 1, fbuf, v);
if (v < 0) {
char d;
s = remove_sign_bits(s, base);
switch (base) {
case 16: d = 'f'; break;
case 8: d = '7'; break;
case 2: d = '1'; break;
default: d = 0; break;
}
if (d && *s != d) {
*--s = d;
}
}
}
len = (int)strlen(s);
if (dots) {
prec -= 2;
width -= 2;
}
if (*p == 'X') {
char *pp = s;
int c;
while ((c = (int)(unsigned char)*pp) != 0) {
*pp = toupper(c);
pp++;
}
}
if (prefix && !prefix[1]) { /* octal */
if (dots) {
prefix = 0;
}
else if (len == 1 && *s == '0') {
len = 0;
if (flags & FPREC) prec--;
}
else if ((flags & FPREC) && (prec > len)) {
prefix = 0;
}
}
else if (len == 1 && *s == '0') {
prefix = 0;
}
if (prefix) {
width -= (int)strlen(prefix);
}
if ((flags & (FZERO|FMINUS|FPREC)) == FZERO) {
prec = width;
width = 0;
}
else {
if (prec < len) {
if (!prefix && prec == 0 && len == 1 && *s == '0') len = 0;
prec = len;
}
width -= prec;
}
if (!(flags&FMINUS)) {
CHECK(width);
while (width-- > 0) {
buf[blen++] = ' ';
}
}
if (sc) PUSH(&sc, 1);
if (prefix) {
int plen = (int)strlen(prefix);
PUSH(prefix, plen);
}
CHECK(prec - len);
if (dots) PUSH("..", 2);
if (v < 0 || (base == 2 && org_v < 0)) {
char c = sign_bits(base, p);
while (len < prec--) {
buf[blen++] = c;
}
}
else if ((flags & (FMINUS|FPREC)) != FMINUS) {
char c = '0';
while (len < prec--) {
buf[blen++] = c;
}
}
PUSH(s, len);
CHECK(width);
while (width-- > 0) {
buf[blen++] = ' ';
}
}
break;
case 'f':
case 'g':
case 'G':
case 'e':
case 'E':
case 'a':
case 'A': {
mrb_value val = GETARG();
double fval;
int i, need = 6;
char fbuf[32];
fval = mrb_float(mrb_Float(mrb, val));
if (isnan(fval) || isinf(fval)) {
const char *expr;
const int elen = 3;
if (isnan(fval)) {
expr = "NaN";
}
else {
expr = "Inf";
}
need = elen;
if ((!isnan(fval) && fval < 0.0) || (flags & FPLUS))
need++;
if ((flags & FWIDTH) && need < width)
need = width;
CHECK(need + 1);
n = snprintf(&buf[blen], need + 1, "%*s", need, "");
if (flags & FMINUS) {
if (!isnan(fval) && fval < 0.0)
buf[blen++] = '-';
else if (flags & FPLUS)
buf[blen++] = '+';
else if (flags & FSPACE)
blen++;
memcpy(&buf[blen], expr, elen);
}
else {
if (!isnan(fval) && fval < 0.0)
buf[blen + need - elen - 1] = '-';
else if (flags & FPLUS)
buf[blen + need - elen - 1] = '+';
else if ((flags & FSPACE) && need > width)
blen++;
memcpy(&buf[blen + need - elen], expr, elen);
}
blen += strlen(&buf[blen]);
break;
}
fmt_setup(fbuf, sizeof(fbuf), *p, flags, width, prec);
need = 0;
if (*p != 'e' && *p != 'E') {
i = INT_MIN;
frexp(fval, &i);
if (i > 0)
need = BIT_DIGITS(i);
}
need += (flags&FPREC) ? prec : 6;
if ((flags&FWIDTH) && need < width)
need = width;
need += 20;
CHECK(need);
n = snprintf(&buf[blen], need, fbuf, fval);
blen += n;
}
break;
}
flags = FNONE;
}
sprint_exit:
#if 0
/* XXX - We cannot validate the number of arguments if (digit)$ style used.
*/
if (posarg >= 0 && nextarg < argc) {
const char *mesg = "too many arguments for format string";
if (mrb_test(ruby_debug)) mrb_raise(mrb, E_ARGUMENT_ERROR, mesg);
if (mrb_test(ruby_verbose)) mrb_warn("%s", mesg);
}
#endif
mrb_str_resize(mrb, result, blen);
return result;
}
static void
fmt_setup(char *buf, size_t size, int c, int flags, int width, int prec)
{
char *end = buf + size;
int n;
*buf++ = '%';
if (flags & FSHARP) *buf++ = '#';
if (flags & FPLUS) *buf++ = '+';
if (flags & FMINUS) *buf++ = '-';
if (flags & FZERO) *buf++ = '0';
if (flags & FSPACE) *buf++ = ' ';
if (flags & FWIDTH) {
n = snprintf(buf, end - buf, "%d", width);
buf += n;
}
if (flags & FPREC) {
n = snprintf(buf, end - buf, ".%d", prec);
buf += n;
}
*buf++ = c;
*buf = '\0';
}
#endif /* ENABLE_SPRINTF */
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