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/* See LICENSE file for copyright and license details. */
#include "libfonts.h"
#include <ctype.h>
#include <errno.h>
#include <string.h>
#define LIST_FIELDS(X)\
X(foundry)\
X(family_name)\
X(weight_name)\
X(slant)\
X(setwidth_name)\
X(add_style_name)\
X(pixel_size)\
X(point_size)\
X(resolution_x)\
X(resolution_y)\
X(spacing)\
X(average_width)\
X(charset_registry)\
X(charset_encoding)
static char *
encode(char *out, const char *s)
{
for (; *s; s++)
*out++ = (*s == '-' ? '~' : *s);
return out;
}
static char *
encode_range(char *out, const char *s)
{
if (*s == '-') {
*out++ = '~';
s++;
}
for (; *s; s++)
*out++ = (*s == '-' ? isdigit(s[-1]) ? '_' : '~' : *s);
return out;
}
int
libfonts_encode_font_description(const struct libfonts_font_description *desc, char out[static 256])
{
size_t n = 1;
char *p;
if (desc->private_font_name) {
if (strlen(desc->private_font_name) > 255)
goto einval;
stpcpy(out, desc->private_font_name);
return 0;
}
if (desc->xlfd_version)
n += strlen(desc->xlfd_version) + 1;
#define X(F)\
if (!desc->F)\
goto einval;\
n += strlen(desc->F) + 1;
LIST_FIELDS(X)
#undef X
if (desc->charset_subset)
n += strlen(desc->charset_subset) + 2;
if (desc->unrecognised_fields)
n += strlen(desc->unrecognised_fields) + 1;
if (n > 255)
goto einval;
p = out;
if (desc->xlfd_version) {
*p++ = '+';
p = encode(p, desc->xlfd_version);
}
#define X(F)\
*p++ = '-';\
p = encode(p, desc->F);
LIST_FIELDS(X)
#undef X
if (desc->charset_subset) {
*p++ = '[';
p = encode_range(p, desc->charset_subset);
*p++ = ']';
}
if (desc->unrecognised_fields) {
*p++ = '-';
p = stpcpy(p, desc->unrecognised_fields);
}
*p = '\0';
return 0;
einval:
errno = EINVAL;
return -1;
}
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