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https://github.com/omar-polo/gmid.git
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0fbe79b33c
we still have an hardcoded list, but this implements the API needed to modify the mappings.
117 lines
2.5 KiB
C
117 lines
2.5 KiB
C
/*
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* Copyright (c) 2021 Omar Polo <op@omarpolo.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include "gmid.h"
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struct etm { /* extension to mime */
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const char *mime;
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const char *ext;
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};
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struct mimes {
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struct etm *t;
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size_t len;
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size_t cap;
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};
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struct mimes mimes;
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void
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init_mime(void)
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{
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mimes.len = 0;
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mimes.cap = 2;
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if ((mimes.t = calloc(mimes.cap, sizeof(struct etm))) == NULL)
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fatal("calloc: %s", strerror(errno));
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}
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/* register mime for the given extension */
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void
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add_mime(const char *mime, const char *ext)
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{
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if (mimes.len == mimes.cap) {
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mimes.cap *= 1.5;
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mimes.t = realloc(mimes.t, mimes.cap * sizeof(struct etm));
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if (mimes.t == NULL)
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fatal("realloc: %s", strerror(errno));
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}
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mimes.t[mimes.len].mime = mime;
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mimes.t[mimes.len].ext = ext;
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mimes.len++;
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}
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/* load a default set of common mime-extension associations */
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void
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load_default_mime()
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{
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struct etm *i, m[] = {
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{"application/pdf", "pdf"},
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{"image/gif", "gif"},
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{"image/jpeg", "jpg"},
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{"image/jpeg", "jpeg"},
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{"image/png", "png"},
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{"image/svg+xml", "svg"},
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{"text/gemini", "gemini"},
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{"text/gemini", "gmi"},
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{"text/markdown", "markdown"},
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{"text/markdown", "md"},
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{"text/plain", "txt"},
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{"text/xml", "xml"},
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{NULL, NULL}
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};
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for (i = m; i->mime != NULL; ++i)
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add_mime(i->mime, i->ext);
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}
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static const char *
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path_ext(const char *path)
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{
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const char *end;
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end = path + strlen(path)-1;
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for (; end != path; --end) {
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if (*end == '.')
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return end+1;
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if (*end == '/')
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break;
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}
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return NULL;
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}
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const char *
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mime(const char *path)
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{
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const char *ext, *def = "application/octet-stream";
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struct etm *t;
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if ((ext = path_ext(path)) == NULL)
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return def;
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for (t = mimes.t; t->mime != NULL; ++t)
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if (!strcmp(ext, t->ext))
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return t->mime;
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return def;
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}
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