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#include "mupdf/fitz.h"
struct fmtbuf
{
char *p;
int s;
int n;
};
static void fmtputc(struct fmtbuf *out, int c)
{
if (out->n < out->s)
out->p[out->n] = c;
++(out->n);
}
/*
* Convert float to shortest possible string that won't lose precision, except:
* NaN to 0, +Inf to FLT_MAX, -Inf to -FLT_MAX.
*/
static void fmtfloat(struct fmtbuf *out, float f)
{
char digits[40], *s = digits;
int exp, neg, ndigits, point;
if (isnan(f)) f = 0;
if (isinf(f)) f = f < 0 ? -FLT_MAX : FLT_MAX;
fz_dtoa(f, digits, &exp, &neg, &ndigits);
point = exp + ndigits;
if (neg)
fmtputc(out, '-');
if (point <= 0)
{
fmtputc(out, '.');
while (point++ < 0)
fmtputc(out, '0');
while (ndigits-- > 0)
fmtputc(out, *s++);
}
else
{
while (ndigits-- > 0)
{
fmtputc(out, *s++);
if (--point == 0 && ndigits > 0)
fmtputc(out, '.');
}
while (point-- > 0)
fmtputc(out, '0');
}
}
static void fmtint(struct fmtbuf *out, int value, int z, int base)
{
static const char *digits = "0123456789abcdef";
char buf[40];
unsigned int a;
int i;
if (value < 0)
{
fmtputc(out, '-');
a = -value;
}
else
a = value;
i = 0;
while (a) {
buf[i++] = digits[a % base];
a /= base;
}
while (i < z)
buf[i++] = '0';
while (i > 0)
fmtputc(out, buf[--i]);
}
static void fmtquote(struct fmtbuf *out, const char *s, int sq, int eq)
{
int c;
fmtputc(out, sq);
while ((c = *s++) != 0) {
switch (c) {
default:
if (c < 32 || c > 127) {
fmtputc(out, '\\');
fmtputc(out, '0' + ((c >> 6) & 7));
fmtputc(out, '0' + ((c >> 3) & 7));
fmtputc(out, '0' + ((c) & 7));
} else {
if (c == sq || c == eq)
fmtputc(out, '\\');
fmtputc(out, c);
}
break;
case '\\': fmtputc(out, '\\'); fmtputc(out, '\\'); break;
case '\b': fmtputc(out, '\\'); fmtputc(out, 'b'); break;
case '\f': fmtputc(out, '\\'); fmtputc(out, 'f'); break;
case '\n': fmtputc(out, '\\'); fmtputc(out, 'n'); break;
case '\r': fmtputc(out, '\\'); fmtputc(out, 'r'); break;
case '\t': fmtputc(out, '\\'); fmtputc(out, 't'); break;
}
}
fmtputc(out, eq);
}
int
fz_vsnprintf(char *buffer, int space, const char *fmt, va_list args)
{
struct fmtbuf out;
fz_matrix *m;
fz_rect *r;
fz_point *p;
int c, i, n, z;
double f;
char *s;
out.p = buffer;
out.s = space;
out.n = 0;
while ((c = *fmt++) != 0)
{
if (c == '%') {
c = *fmt++;
if (c == 0)
break;
z = 1;
if (c == '0' && fmt[0] && fmt[1]) {
z = *fmt++ - '0';
c = *fmt++;
}
switch (c) {
default:
fmtputc(&out, '%');
fmtputc(&out, c);
break;
case '%':
fmtputc(&out, '%');
break;
case 'M':
m = va_arg(args, fz_matrix*);
fmtfloat(&out, m->a); fmtputc(&out, ' ');
fmtfloat(&out, m->b); fmtputc(&out, ' ');
fmtfloat(&out, m->c); fmtputc(&out, ' ');
fmtfloat(&out, m->d); fmtputc(&out, ' ');
fmtfloat(&out, m->e); fmtputc(&out, ' ');
fmtfloat(&out, m->f);
break;
case 'R':
r = va_arg(args, fz_rect*);
fmtfloat(&out, r->x0); fmtputc(&out, ' ');
fmtfloat(&out, r->y0); fmtputc(&out, ' ');
fmtfloat(&out, r->x1); fmtputc(&out, ' ');
fmtfloat(&out, r->y1);
break;
case 'P':
p = va_arg(args, fz_point*);
fmtfloat(&out, p->x); fmtputc(&out, ' ');
fmtfloat(&out, p->y);
break;
case 'C':
c = va_arg(args, int);
if (c < 128)
fmtputc(&out, c);
else {
char buf[10];
n = fz_runetochar(buf, c);
for (i=0; i < n; ++i)
fmtputc(&out, buf[i]);
}
break;
case 'c':
c = va_arg(args, int);
fmtputc(&out, c);
break;
case 'f':
case 'g':
f = va_arg(args, double);
fmtfloat(&out, f);
break;
case 'x':
i = va_arg(args, int);
fmtint(&out, i, z, 16);
break;
case 'd':
i = va_arg(args, int);
fmtint(&out, i, z, 10);
break;
case 'o':
i = va_arg(args, int);
fmtint(&out, i, z, 8);
break;
case 's':
s = va_arg(args, char*);
if (!s)
s = "(null)";
while ((c = *s++) != 0)
fmtputc(&out, c);
break;
case 'q':
s = va_arg(args, char*);
if (!s) s = "";
fmtquote(&out, s, '"', '"');
break;
case '(':
s = va_arg(args, char*);
if (!s) s = "";
fmtquote(&out, s, '(', ')');
break;
}
} else {
fmtputc(&out, c);
}
}
fmtputc(&out, 0);
return out.n - 1;
}
int
fz_vfprintf(fz_context *ctx, FILE *file, const char *fmt, va_list old_args)
{
char buffer[256];
int l;
va_list args;
char *b = buffer;
/* First try using our fixed size buffer */
va_copy(args, old_args);
l = fz_vsnprintf(buffer, sizeof buffer, fmt, args);
va_copy_end(args);
/* If that failed, allocate the right size buffer dynamically */
if (l >= sizeof buffer)
{
b = fz_malloc(ctx, l + 1);
va_copy(args, old_args);
fz_vsnprintf(b, l + 1, fmt, args);
va_copy_end(args);
}
l = fwrite(b, 1, l, file);
if (b != buffer)
fz_free(ctx, b);
return l;
}
int
fz_snprintf(char *buffer, int space, const char *fmt, ...)
{
int n;
va_list ap;
va_start(ap, fmt);
n = fz_vsnprintf(buffer, space, fmt, ap);
va_end(ap);
return n;
}
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