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Copy pathhtml_parser_fmt.c
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404 lines (373 loc) · 9.14 KB
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#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <limits.h>
#include <float.h>
#include <ctype.h>
#include <math.h>
#include "html_parser_assert.h"
#include "html_parser_except.h"
#include "html_parser_fmt.h"
#include "html_parser_mem.h"
#define T Fmt_T
struct buf {
char *buf;
char *bp;
int size;
};
#define pad(n,c) do { int nn = (n); \
while (nn-- > 0) \
put((c), cl); } while (0)
static void cvt_s(int code, va_list_box *box,
int put(int c, void *cl), void *cl,
unsigned char flags[], int width, int precision) {
char *str = va_arg(box->ap, char *);
assert(str);
Fmt_puts(str, strlen(str), put, cl, flags,
width, precision);
}
static void cvt_d(int code, va_list_box *box,
int put(int c, void *cl), void *cl,
unsigned char flags[], int width, int precision) {
int val = va_arg(box->ap, int);
unsigned m;
char buf[43];
char *p = buf + sizeof buf;
if (val == INT_MIN)
m = INT_MAX + 1U;
else if (val < 0)
m = -val;
else
m = val;
do
*--p = m%10 + '0';
while ((m /= 10) > 0);
if (val < 0)
*--p = '-';
Fmt_putd(p, (buf + sizeof buf) - p, put, cl, flags,
width, precision);
}
static void cvt_u(int code, va_list_box *box,
int put(int c, void *cl), void *cl,
unsigned char flags[], int width, int precision) {
unsigned m = va_arg(box->ap, unsigned);
char buf[43];
char *p = buf + sizeof buf;
do
*--p = m%10 + '0';
while ((m /= 10) > 0);
Fmt_putd(p, (buf + sizeof buf) - p, put, cl, flags,
width, precision);
}
static void cvt_o(int code, va_list_box *box,
int put(int c, void *cl), void *cl,
unsigned char flags[], int width, int precision) {
unsigned m = va_arg(box->ap, unsigned);
char buf[43];
char *p = buf + sizeof buf;
do
*--p = (m&0x7) + '0';
while ((m>>= 3) != 0);
Fmt_putd(p, (buf + sizeof buf) - p, put, cl, flags,
width, precision);
}
static void cvt_x(int code, va_list_box *box,
int put(int c, void *cl), void *cl,
unsigned char flags[], int width, int precision) {
unsigned m = va_arg(box->ap, unsigned);
char buf[43];
char *p = buf + sizeof buf;
do
*--p = "0123456789abcdef"[m&0xf];
while ((m>>= 4) != 0);
Fmt_putd(p, (buf + sizeof buf) - p, put, cl, flags,
width, precision);
}
static void cvt_p(int code, va_list_box *box,
int put(int c, void *cl), void *cl,
unsigned char flags[], int width, int precision) {
unsigned long m = (unsigned long)va_arg(box->ap, void*);
char buf[43];
char *p = buf + sizeof buf;
precision = INT_MIN;
do
*--p = "0123456789abcdef"[m&0xf];
while ((m>>= 4) != 0);
Fmt_putd(p, (buf + sizeof buf) - p, put, cl, flags,
width, precision);
}
static void cvt_c(int code, va_list_box *box,
int put(int c, void *cl), void *cl,
unsigned char flags[], int width, int precision) {
if (width == INT_MIN)
width = 0;
if (width < 0) {
flags['-'] = 1;
width = -width;
}
if (!flags['-'])
pad(width - 1, ' ');
put((unsigned char)va_arg(box->ap, int), cl);
if ( flags['-'])
pad(width - 1, ' ');
}
static void cvt_f(int code, va_list_box *box,
int put(int c, void *cl), void *cl,
unsigned char flags[], int width, int precision) {
char buf[DBL_MAX_10_EXP+1+1+99+1];
if (precision < 0)
precision = 6;
if (code == 'g' && precision == 0)
precision = 1;
{
static char fmt[] = "%.dd?";
assert(precision <= 99);
fmt[4] = code;
fmt[3] = precision%10 + '0';
fmt[2] = (precision/10)%10 + '0';
sprintf(buf, fmt, va_arg(box->ap, double));
}
Fmt_putd(buf, strlen(buf), put, cl, flags,
width, precision);
}
const Except_T Fmt_Overflow = { "Formatting Overflow" };
static T cvt[256] = {
/* 0- 7 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 8- 15 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 16- 23 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 24- 31 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 32- 39 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 40- 47 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 48- 55 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 56- 63 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 64- 71 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 72- 79 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 80- 87 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 88- 95 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 96-103 */ 0, 0, 0, cvt_c, cvt_d, cvt_f, cvt_f, cvt_f,
/* 104-111 */ 0, 0, 0, 0, 0, 0, 0, cvt_o,
/* 112-119 */ cvt_p, 0, 0, cvt_s, 0, cvt_u, 0, 0,
/* 120-127 */ cvt_x, 0, 0, 0, 0, 0, 0, 0
};
char *Fmt_flags = "-+ 0";
static int outc(int c, void *cl) {
FILE *f = cl;
return putc(c, f);
}
static int insert(int c, void *cl) {
struct buf *p = cl;
if (p->bp >= p->buf + p->size)
RAISE(Fmt_Overflow);
*p->bp++ = c;
return c;
}
static int append(int c, void *cl) {
struct buf *p = cl;
if (p->bp >= p->buf + p->size) {
RESIZE(p->buf, 2*p->size);
p->bp = p->buf + p->size;
p->size *= 2;
}
*p->bp++ = c;
return c;
}
void Fmt_puts(const char *str, int len,
int put(int c, void *cl), void *cl,
unsigned char flags[], int width, int precision) {
assert(str);
assert(len >= 0);
assert(flags);
if (width == INT_MIN)
width = 0;
if (width < 0) {
flags['-'] = 1;
width = -width;
}
if (precision >= 0)
flags['0'] = 0;
if (precision >= 0 && precision < len)
len = precision;
if (!flags['-'])
pad(width - len, ' ');
{
int i;
for (i = 0; i < len; i++)
put((unsigned char)*str++, cl);
}
if ( flags['-'])
pad(width - len, ' ');
}
void Fmt_fmt(int put(int c, void *), void *cl,
const char *fmt, ...) {
va_list_box box;
va_start(box.ap, fmt);
Fmt_vfmt(put, cl, fmt, &box);
va_end(box.ap);
}
void Fmt_print(const char *fmt, ...) {
va_list_box box;
va_start(box.ap, fmt);
Fmt_vfmt(outc, stdout, fmt, &box);
va_end(box.ap);
}
void Fmt_fprint(FILE *stream, const char *fmt, ...) {
va_list_box box;
va_start(box.ap, fmt);
Fmt_vfmt(outc, stream, fmt, &box);
va_end(box.ap);
}
int Fmt_sfmt(char *buf, int size, const char *fmt, ...) {
int len;
va_list_box box;
va_start(box.ap, fmt);
len = Fmt_vsfmt(buf, size, fmt, &box);
va_end(box.ap);
return len;
}
int Fmt_vsfmt(char *buf, int size, const char *fmt,
va_list_box *box) {
struct buf cl;
assert(buf);
assert(size > 0);
assert(fmt);
cl.buf = cl.bp = buf;
cl.size = size;
Fmt_vfmt(insert, &cl, fmt, box);
insert(0, &cl);
return cl.bp - cl.buf - 1;
}
char *Fmt_string(const char *fmt, ...) {
char *str;
va_list_box box;
assert(fmt);
va_start(box.ap, fmt);
str = Fmt_vstring(fmt, &box);
va_end(box.ap);
return str;
}
char *Fmt_vstring(const char *fmt, va_list_box *box) {
struct buf cl;
assert(fmt);
cl.size = 256;
cl.buf = cl.bp = ALLOC(cl.size);
Fmt_vfmt(append, &cl, fmt, box);
append(0, &cl);
return RESIZE(cl.buf, cl.bp - cl.buf);
}
void Fmt_vfmt(int put(int c, void *cl), void *cl,
const char *fmt, va_list_box *box) {
assert(put);
assert(fmt);
while (*fmt)
if (*fmt != '%' || *++fmt == '%')
put((unsigned char)*fmt++, cl);
else
{
unsigned char c, flags[256];
int width = INT_MIN, precision = INT_MIN;
memset(flags, '\0', sizeof flags);
if (Fmt_flags) {
unsigned char c = *fmt;
for ( ; c && strchr(Fmt_flags, c); c = *++fmt) {
assert(flags[c] < 255);
flags[c]++;
}
}
if (*fmt == '*' || isdigit(*fmt)) {
int n;
if (*fmt == '*') {
n = va_arg(box->ap, int);
assert(n != INT_MIN);
fmt++;
} else
for (n = 0; isdigit(*fmt); fmt++) {
int d = *fmt - '0';
assert(n <= (INT_MAX - d)/10);
n = 10*n + d;
}
width = n;
}
if (*fmt == '.' && (*++fmt == '*' || isdigit(*fmt))) {
int n;
if (*fmt == '*') {
n = va_arg(box->ap, int);
assert(n != INT_MIN);
fmt++;
} else
for (n = 0; isdigit(*fmt); fmt++) {
int d = *fmt - '0';
assert(n <= (INT_MAX - d)/10);
n = 10*n + d;
}
precision = n;
}
c = *fmt++;
assert(cvt[c]);
(*cvt[c])(c, box, put, cl, flags, width, precision);
}
}
T Fmt_register(int code, T newcvt) {
T old;
assert(0 < code
&& code < (int)(sizeof (cvt)/sizeof (cvt[0])));
old = cvt[code];
cvt[code] = newcvt;
return old;
}
void Fmt_putd(const char *str, int len,
int put(int c, void *cl), void *cl,
unsigned char flags[], int width, int precision) {
int sign;
assert(str);
assert(len >= 0);
assert(flags);
if (width == INT_MIN)
width = 0;
if (width < 0) {
flags['-'] = 1;
width = -width;
}
if (precision >= 0)
flags['0'] = 0;
if (len > 0 && (*str == '-' || *str == '+')) {
sign = *str++;
len--;
} else if (flags['+'])
sign = '+';
else if (flags[' '])
sign = ' ';
else
sign = 0;
{ int n;
if (precision < 0)
precision = 1;
if (len < precision)
n = precision;
else if (precision == 0 && len == 1 && str[0] == '0')
n = 0;
else
n = len;
if (sign)
n++;
if (flags['-']) {
if (sign)
put(sign, cl);
} else if (flags['0']) {
if (sign)
put(sign, cl);
pad(width - n, '0');
} else {
pad(width - n, ' ');
if (sign)
put(sign, cl);
}
pad(precision - len, '0');
{
int i;
for (i = 0; i < len; i++)
put((unsigned char)*str++, cl);
}
if (flags['-'])
pad(width - n, ' '); }
}