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/*
* Copyright (c) 2021 Omar Polo <op@omarpolo.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include "gmid.h"
struct etm { /* extension to mime */
const char *mime;
const char *ext;
};
struct mimes {
struct etm *t;
size_t len;
size_t cap;
};
struct mimes mimes;
void
init_mime(void)
{
mimes.len = 0;
mimes.cap = 2;
if ((mimes.t = calloc(mimes.cap, sizeof(struct etm))) == NULL)
fatal("calloc: %s", strerror(errno));
}
/* register mime for the given extension */
void
add_mime(const char *mime, const char *ext)
{
if (mimes.len == mimes.cap) {
mimes.cap *= 1.5;
mimes.t = realloc(mimes.t, mimes.cap * sizeof(struct etm));
if (mimes.t == NULL)
fatal("realloc: %s", strerror(errno));
}
mimes.t[mimes.len].mime = mime;
mimes.t[mimes.len].ext = ext;
mimes.len++;
}
/* load a default set of common mime-extension associations */
void
load_default_mime()
{
struct etm *i, m[] = {
{"application/pdf", "pdf"},
{"image/gif", "gif"},
{"image/jpeg", "jpg"},
{"image/jpeg", "jpeg"},
{"image/png", "png"},
{"image/svg+xml", "svg"},
{"text/gemini", "gemini"},
{"text/gemini", "gmi"},
{"text/markdown", "markdown"},
{"text/markdown", "md"},
{"text/plain", "txt"},
{"text/xml", "xml"},
{NULL, NULL}
};
for (i = m; i->mime != NULL; ++i)
add_mime(i->mime, i->ext);
}
static const char *
path_ext(const char *path)
{
const char *end;
end = path + strlen(path)-1;
for (; end != path; --end) {
if (*end == '.')
return end+1;
if (*end == '/')
break;
}
return NULL;
}
const char *
mime(const char *path)
{
const char *ext, *def = "application/octet-stream";
struct etm *t;
if ((ext = path_ext(path)) == NULL)
return def;
for (t = mimes.t; t->mime != NULL; ++t)
if (!strcmp(ext, t->ext))
return t->mime;
return def;
}
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