Blame

Date:
Message:
simplify the caching API - don't expose the evbuffer where we store the cached page - cache to/from tabs instead of buffers
Actions:
History | Blob | Raw File
  1 d5af38cc 2022-01-10 op /*

  2 d5af38cc 2022-01-10 op  * Copyright (c) 2022 Omar Polo <op@omarpolo.com>

  3 d5af38cc 2022-01-10 op  *

  4 d5af38cc 2022-01-10 op  * Permission to use, copy, modify, and distribute this software for any

  5 d5af38cc 2022-01-10 op  * purpose with or without fee is hereby granted, provided that the above

  6 d5af38cc 2022-01-10 op  * copyright notice and this permission notice appear in all copies.

  7 d5af38cc 2022-01-10 op  *

  8 d5af38cc 2022-01-10 op  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

  9 d5af38cc 2022-01-10 op  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

 10 d5af38cc 2022-01-10 op  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

 11 d5af38cc 2022-01-10 op  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

 12 d5af38cc 2022-01-10 op  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

 13 d5af38cc 2022-01-10 op  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

 14 d5af38cc 2022-01-10 op  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

 15 d5af38cc 2022-01-10 op  */

 16 d5af38cc 2022-01-10 op 

 17 d5af38cc 2022-01-10 op #include "compat.h"

 18 d5af38cc 2022-01-10 op 

 19 d5af38cc 2022-01-10 op #include <stdlib.h>

 20 d5af38cc 2022-01-10 op #include <stdint.h>

 21 d5af38cc 2022-01-10 op #include <string.h>

 22 d5af38cc 2022-01-10 op 

 23 d5af38cc 2022-01-10 op #include "telescope.h"

 24 d5af38cc 2022-01-10 op #include "mcache.h"

 25 8f3c9af8 2022-01-11 op #include "parser.h"

 26 d5af38cc 2022-01-10 op 

 27 d5af38cc 2022-01-10 op const char *gemtext_prefixes[] = {

 28 d5af38cc 2022-01-10 op 	[LINE_TEXT] = "",

 29 d5af38cc 2022-01-10 op 	[LINE_TITLE_1] = "# ",

 30 d5af38cc 2022-01-10 op 	[LINE_TITLE_2] = "## ",

 31 d5af38cc 2022-01-10 op 	[LINE_TITLE_3] = "### ",

 32 d5af38cc 2022-01-10 op 	[LINE_ITEM] = "* ",

 33 d5af38cc 2022-01-10 op 	[LINE_QUOTE] = "> ",

 34 d5af38cc 2022-01-10 op 	[LINE_PRE_START] = "``` ",

 35 d5af38cc 2022-01-10 op 	[LINE_PRE_CONTENT] = "",

 36 d5af38cc 2022-01-10 op 	[LINE_PRE_END] = "```",

 37 d5af38cc 2022-01-10 op };

 38 d5af38cc 2022-01-10 op 

 39 d5af38cc 2022-01-10 op struct mcache {

 40 d5af38cc 2022-01-10 op 	struct ohash	h;

 41 d5af38cc 2022-01-10 op 	size_t		tot;

 42 d5af38cc 2022-01-10 op } mcache;

 43 d5af38cc 2022-01-10 op 

 44 d5af38cc 2022-01-10 op struct mcache_entry {

 45 d5af38cc 2022-01-10 op 	int		 trust;

 46 d5af38cc 2022-01-10 op 	struct evbuffer	*evb;

 47 d5af38cc 2022-01-10 op 	char		 url[];

 48 d5af38cc 2022-01-10 op };

 49 d5af38cc 2022-01-10 op 

 50 d5af38cc 2022-01-10 op static void	*hash_alloc(size_t, void *);

 51 d5af38cc 2022-01-10 op static void	*hash_calloc(size_t, size_t, void *);

 52 d5af38cc 2022-01-10 op static void	 hash_free(void *, void *);

 53 d5af38cc 2022-01-10 op 

 54 d5af38cc 2022-01-10 op static void *

 55 d5af38cc 2022-01-10 op hash_alloc(size_t len, void *d)

 56 d5af38cc 2022-01-10 op {

 57 d5af38cc 2022-01-10 op 	if ((d = malloc(len)) == NULL)

 58 d5af38cc 2022-01-10 op 		abort();

 59 d5af38cc 2022-01-10 op 	return d;

 60 d5af38cc 2022-01-10 op }

 61 d5af38cc 2022-01-10 op 

 62 d5af38cc 2022-01-10 op static void *

 63 d5af38cc 2022-01-10 op hash_calloc(size_t nmemb, size_t size, void *d)

 64 d5af38cc 2022-01-10 op {

 65 d5af38cc 2022-01-10 op 	if ((d = calloc(nmemb, size)) == NULL)

 66 d5af38cc 2022-01-10 op 		abort();

 67 d5af38cc 2022-01-10 op 	return d;

 68 d5af38cc 2022-01-10 op }

 69 d5af38cc 2022-01-10 op 

 70 d5af38cc 2022-01-10 op static void

 71 d5af38cc 2022-01-10 op hash_free(void *ptr, void *d)

 72 d5af38cc 2022-01-10 op {

 73 d5af38cc 2022-01-10 op 	free(ptr);

 74 d5af38cc 2022-01-10 op }

 75 d5af38cc 2022-01-10 op 

 76 d5af38cc 2022-01-10 op void

 77 d5af38cc 2022-01-10 op mcache_init(void)

 78 d5af38cc 2022-01-10 op {

 79 d5af38cc 2022-01-10 op 	struct ohash_info info = {

 80 d5af38cc 2022-01-10 op 		.key_offset = offsetof(struct mcache_entry, url),

 81 d5af38cc 2022-01-10 op 		.calloc = hash_calloc,

 82 d5af38cc 2022-01-10 op 		.free = hash_free,

 83 d5af38cc 2022-01-10 op 		.alloc = hash_alloc,

 84 d5af38cc 2022-01-10 op 	};

 85 d5af38cc 2022-01-10 op 

 86 d5af38cc 2022-01-10 op 	ohash_init(&mcache.h, 5, &info);

 87 d5af38cc 2022-01-10 op }

 88 d5af38cc 2022-01-10 op 

 89 d5af38cc 2022-01-10 op int

 90 8f3c9af8 2022-01-11 op mcache_tab(struct tab *tab)

 91 d5af38cc 2022-01-10 op {

 92 d5af38cc 2022-01-10 op 	struct mcache_entry	*e;

 93 d5af38cc 2022-01-10 op 	struct line		*line;

 94 d5af38cc 2022-01-10 op 	unsigned int		 slot;

 95 d5af38cc 2022-01-10 op 	size_t			 l, len;

 96 8f3c9af8 2022-01-11 op 	const char		*url;

 97 d5af38cc 2022-01-10 op 

 98 8f3c9af8 2022-01-11 op 	url = tab->hist_cur->h;

 99 d5af38cc 2022-01-10 op 	l = strlen(url);

100 d5af38cc 2022-01-10 op 	len = sizeof(*e) + l + 1;

101 d5af38cc 2022-01-10 op 

102 d5af38cc 2022-01-10 op 	if ((e = calloc(1, len)) == NULL)

103 d5af38cc 2022-01-10 op 		return -1;

104 8f3c9af8 2022-01-11 op 	e->trust = tab->trust;

105 d5af38cc 2022-01-10 op 	memcpy(e->url, url, l);

106 d5af38cc 2022-01-10 op 

107 d5af38cc 2022-01-10 op 	if ((e->evb = evbuffer_new()) == NULL)

108 d5af38cc 2022-01-10 op 		goto err;

109 d5af38cc 2022-01-10 op 

110 8f3c9af8 2022-01-11 op 	TAILQ_FOREACH(line, &tab->buffer.page.head, lines) {

111 d5af38cc 2022-01-10 op 		const char	*text, *alt;

112 d5af38cc 2022-01-10 op 		int		 r;

113 d5af38cc 2022-01-10 op 

114 d5af38cc 2022-01-10 op 		if ((text = line->line) == NULL)

115 d5af38cc 2022-01-10 op 			text = "";

116 d5af38cc 2022-01-10 op 

117 d5af38cc 2022-01-10 op 		if ((alt = line->alt) == NULL)

118 d5af38cc 2022-01-10 op 			alt = "";

119 d5af38cc 2022-01-10 op 

120 d5af38cc 2022-01-10 op 		switch (line->type) {

121 d5af38cc 2022-01-10 op 		case LINE_TEXT:

122 d5af38cc 2022-01-10 op 		case LINE_TITLE_1:

123 d5af38cc 2022-01-10 op 		case LINE_TITLE_2:

124 d5af38cc 2022-01-10 op 		case LINE_TITLE_3:

125 d5af38cc 2022-01-10 op 		case LINE_ITEM:

126 d5af38cc 2022-01-10 op 		case LINE_QUOTE:

127 d5af38cc 2022-01-10 op 		case LINE_PRE_START:

128 d5af38cc 2022-01-10 op 		case LINE_PRE_CONTENT:

129 d5af38cc 2022-01-10 op 		case LINE_PRE_END:

130 d5af38cc 2022-01-10 op 			r = evbuffer_add_printf(e->evb, "%s%s\n",

131 d5af38cc 2022-01-10 op 			    gemtext_prefixes[line->type], text);

132 d5af38cc 2022-01-10 op 			break;

133 d5af38cc 2022-01-10 op 

134 d5af38cc 2022-01-10 op 		case LINE_LINK:

135 d5af38cc 2022-01-10 op 			r = evbuffer_add_printf(e->evb, "=> %s %s\n",

136 d5af38cc 2022-01-10 op 			    alt, text);

137 d5af38cc 2022-01-10 op 			break;

138 d5af38cc 2022-01-10 op 

139 d5af38cc 2022-01-10 op 		case LINE_PATCH:

140 d5af38cc 2022-01-10 op 		case LINE_PATCH_HDR:

141 d5af38cc 2022-01-10 op 		case LINE_PATCH_HUNK_HDR:

142 d5af38cc 2022-01-10 op 		case LINE_PATCH_ADD:

143 d5af38cc 2022-01-10 op 		case LINE_PATCH_DEL:

144 d5af38cc 2022-01-10 op 			/* TODO */

145 d5af38cc 2022-01-10 op 			r = -1;

146 d5af38cc 2022-01-10 op 			break;

147 d5af38cc 2022-01-10 op 

148 d5af38cc 2022-01-10 op 		case LINE_COMPL:

149 d5af38cc 2022-01-10 op 		case LINE_COMPL_CURRENT:

150 d5af38cc 2022-01-10 op 		case LINE_HELP:

151 d5af38cc 2022-01-10 op 		case LINE_DOWNLOAD:

152 d5af38cc 2022-01-10 op 		case LINE_DOWNLOAD_DONE:

153 d5af38cc 2022-01-10 op 		case LINE_DOWNLOAD_INFO:

154 d5af38cc 2022-01-10 op 		case LINE_FRINGE:

155 d5af38cc 2022-01-10 op 			/* not reached */

156 d5af38cc 2022-01-10 op 			abort();

157 d5af38cc 2022-01-10 op 		}

158 d5af38cc 2022-01-10 op 

159 d5af38cc 2022-01-10 op 		if (r == -1)

160 d5af38cc 2022-01-10 op 			goto err;

161 d5af38cc 2022-01-10 op 	}

162 d5af38cc 2022-01-10 op 

163 d5af38cc 2022-01-10 op 	slot = ohash_qlookup(&mcache.h, url);

164 d5af38cc 2022-01-10 op 	ohash_insert(&mcache.h, slot, e);

165 d5af38cc 2022-01-10 op 	return 0;

166 d5af38cc 2022-01-10 op 

167 d5af38cc 2022-01-10 op err:

168 d5af38cc 2022-01-10 op 	if (e->evb != NULL)

169 d5af38cc 2022-01-10 op 		evbuffer_free(e->evb);

170 d5af38cc 2022-01-10 op 	free(e);

171 d5af38cc 2022-01-10 op 	return -1;

172 d5af38cc 2022-01-10 op }

173 d5af38cc 2022-01-10 op 

174 d5af38cc 2022-01-10 op int

175 8f3c9af8 2022-01-11 op mcache_lookup(const char *url, struct tab *tab)

176 d5af38cc 2022-01-10 op {

177 d5af38cc 2022-01-10 op 	struct mcache_entry	*e;

178 d5af38cc 2022-01-10 op 	unsigned int		 slot;

179 d5af38cc 2022-01-10 op 

180 d5af38cc 2022-01-10 op 	slot = ohash_qlookup(&mcache.h, url);

181 d5af38cc 2022-01-10 op 	if ((e = ohash_find(&mcache.h, slot)) == NULL)

182 d5af38cc 2022-01-10 op 		return 0;

183 d5af38cc 2022-01-10 op 

184 8f3c9af8 2022-01-11 op 	parser_init(tab, gemtext_initparser);

185 8f3c9af8 2022-01-11 op 	if (!parser_parse(tab, EVBUFFER_DATA(e->evb), EVBUFFER_LENGTH(e->evb)))

186 8f3c9af8 2022-01-11 op 		goto err;

187 8f3c9af8 2022-01-11 op 	if (!parser_free(tab))

188 8f3c9af8 2022-01-11 op 		goto err;

189 8f3c9af8 2022-01-11 op 

190 8f3c9af8 2022-01-11 op 	tab->trust = e->trust;

191 d5af38cc 2022-01-10 op 	return 1;

192 8f3c9af8 2022-01-11 op 

193 8f3c9af8 2022-01-11 op err:

194 8f3c9af8 2022-01-11 op 	parser_free(tab);

195 8f3c9af8 2022-01-11 op 	erase_buffer(&tab->buffer);

196 8f3c9af8 2022-01-11 op 	return 0;

197 d5af38cc 2022-01-10 op }