mirror of
https://github.com/netsurf-browser/netsurf
synced 2025-01-22 10:22:06 +03:00
allow hash table add inline to be uncompressed
This commit is contained in:
Vincent Sanders
parent
d196ea7795
commit
43582c5055
@ -81,6 +81,175 @@ static inline unsigned int hash_string_fnv(const char *datum, unsigned int *len)
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}
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/**
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* process a line of input.
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*
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* \param hash The hash table to add the line to
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* \param ln The line to process
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* \param lnlen The length of \ln
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* \return NSERROR_OK on success else NSERROR_INVALID
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*/
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static nserror
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process_line(struct hash_table *hash, uint8_t *ln, int lnlen)
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{
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uint8_t *key;
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uint8_t *value;
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uint8_t *colon;
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key = ln; /* set key to start of line */
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value = ln + lnlen; /* set value to end of line */
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/* skip leading whitespace */
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while ((key < value) &&
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((*key == ' ') || (*key == '\t'))) {
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key++;
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}
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/* empty or comment lines */
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if ((*key == 0) || (*key == '#')) {
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return NSERROR_OK;
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}
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/* find first colon as key/value separator */
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for (colon = key; colon < value; colon++) {
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if (*colon == ':') {
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break;
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}
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}
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if (colon == value) {
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/* no colon found */
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return NSERROR_INVALID;
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}
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*colon = 0; /* terminate key */
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value = colon + 1;
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if (hash_add(hash, (char *)key, (char *)value) == false) {
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NSLOG(netsurf, INFO,
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"Unable to add %s:%s to hash table", ln, value);
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return NSERROR_INVALID;
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}
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return NSERROR_OK;
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}
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/**
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* adds key/value pairs to a hash from a memory area
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*/
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static nserror
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hash_add_inline_plain(struct hash_table *ht, const uint8_t *data, size_t size)
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{
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uint8_t s[LINE_BUFFER_SIZE]; /* line buffer */
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unsigned int slen = 0;
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nserror res = NSERROR_OK;
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while (size > 0) {
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s[slen] = *data;
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if (s[slen] == '\n') {
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s[slen] = 0; /* replace newline with null termination */
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res = process_line(ht, s, slen);
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slen = 0;
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if (res != NSERROR_OK) {
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break;
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}
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} else {
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slen++;
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if (slen > sizeof s) {
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NSLOG(netsurf, INFO, "Overlength line\n");
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slen = 0;
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}
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}
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size--;
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data++;
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}
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if (slen > 0) {
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s[slen] = 0;
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res = process_line(ht, s, slen);
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}
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return res;
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}
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/**
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* adds key/value pairs to a hash from a compressed memory area
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*/
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static nserror
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hash_add_inline_gzip(struct hash_table *ht, const uint8_t *data, size_t size)
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{
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nserror res;
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int ret; /* zlib return value */
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z_stream strm;
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uint8_t s[LINE_BUFFER_SIZE]; /* line buffer */
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size_t used = 0; /* number of bytes in buffer in use */
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uint8_t *nl;
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strm.zalloc = Z_NULL;
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strm.zfree = Z_NULL;
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strm.opaque = Z_NULL;
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strm.next_in = (uint8_t *)data;
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strm.avail_in = size;
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ret = inflateInit2(&strm, 32 + MAX_WBITS);
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if (ret != Z_OK) {
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NSLOG(netsurf, INFO, "inflateInit returned %d", ret);
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return NSERROR_INVALID;
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}
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do {
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strm.next_out = s + used;
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strm.avail_out = sizeof(s) - used;
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ret = inflate(&strm, Z_NO_FLUSH);
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if ((ret != Z_OK) && (ret != Z_STREAM_END)) {
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break;
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}
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used = sizeof(s) - strm.avail_out;
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while (used > 0) {
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/* find nl */
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for (nl = &s[0]; nl < &s[used]; nl++) {
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if (*nl == '\n') {
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break;
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}
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}
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if (nl == &s[used]) {
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/* no nl found */
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break;
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}
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/* found newline */
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*nl = 0; /* null terminate line */
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res = process_line(ht, &s[0], nl - &s[0]);
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if (res != NSERROR_OK) {
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inflateEnd(&strm);
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return res;
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}
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/* move data down */
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memmove(&s[0], nl + 1, used - ((nl + 1) - &s[0]) );
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used -= ((nl +1) - &s[0]);
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}
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if (used == sizeof(s)) {
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/* entire buffer used and no newline */
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NSLOG(netsurf, INFO, "Overlength line");
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used = 0;
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}
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} while (ret != Z_STREAM_END);
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inflateEnd(&strm);
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if (ret != Z_STREAM_END) {
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NSLOG(netsurf, INFO, "inflate returned %d", ret);
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return NSERROR_INVALID;
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}
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return NSERROR_OK;
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}
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/* exported interface documented in utils/hashtable.h */
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struct hash_table *hash_create(unsigned int chains)
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{
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@ -187,57 +356,6 @@ const char *hash_get(struct hash_table *ht, const char *key)
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}
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/**
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* process a line of input.
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*
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* \param hash The hash table to add the line to
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* \param ln The line to process
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* \param lnlen The length of \ln
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* \return NSERROR_OK on success else NSERROR_INVALID
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*/
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static nserror
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process_line(struct hash_table *hash, uint8_t *ln, int lnlen)
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{
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uint8_t *key;
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uint8_t *value;
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uint8_t *colon;
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key = ln; /* set key to start of line */
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value = ln + lnlen; /* set value to end of line */
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/* skip leading whitespace */
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while ((key < value) &&
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((*key == ' ') || (*key == '\t'))) {
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key++;
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}
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/* empty or comment lines */
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if ((*key == 0) || (*key == '#')) {
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return NSERROR_OK;
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}
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/* find first colon as key/value separator */
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for (colon = key; colon < value; colon++) {
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if (*colon == ':') {
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break;
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}
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}
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if (colon == value) {
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/* no colon found */
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return NSERROR_INVALID;
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}
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*colon = 0; /* terminate key */
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value = colon + 1;
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if (hash_add(hash, (char *)key, (char *)value) == false) {
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NSLOG(netsurf, INFO,
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"Unable to add %s:%s to hash table", ln, value);
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return NSERROR_INVALID;
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}
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return NSERROR_OK;
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}
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/* exported interface documented in utils/hashtable.h */
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nserror hash_add_file(struct hash_table *ht, const char *path)
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@ -274,75 +392,13 @@ nserror hash_add_file(struct hash_table *ht, const char *path)
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return res;
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}
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/* exported interface documented in utils/hashtable.h */
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nserror hash_add_inline(struct hash_table *ht, const uint8_t *data, size_t size)
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{
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nserror res;
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int ret; /* zlib return value */
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z_stream strm;
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uint8_t s[LINE_BUFFER_SIZE]; /* line buffer */
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size_t used = 0; /* number of bytes in buffer in use */
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uint8_t *nl;
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strm.zalloc = Z_NULL;
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strm.zfree = Z_NULL;
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strm.opaque = Z_NULL;
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strm.next_in = (uint8_t *)data;
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strm.avail_in = size;
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ret = inflateInit2(&strm, 32 + MAX_WBITS);
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if (ret != Z_OK) {
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NSLOG(netsurf, INFO, "inflateInit returned %d", ret);
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return NSERROR_INVALID;
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if ((data[0]==0x1f) && (data[1] == 0x8b)) {
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/* gzip header detected */
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return hash_add_inline_gzip(ht, data, size);
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}
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do {
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strm.next_out = s + used;
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strm.avail_out = sizeof(s) - used;
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ret = inflate(&strm, Z_NO_FLUSH);
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if ((ret != Z_OK) && (ret != Z_STREAM_END)) {
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break;
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}
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used = sizeof(s) - strm.avail_out;
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while (used > 0) {
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/* find nl */
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for (nl = &s[0]; nl < &s[used]; nl++) {
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if (*nl == '\n') {
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break;
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}
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}
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if (nl == &s[used]) {
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/* no nl found */
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break;
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}
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/* found newline */
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*nl = 0; /* null terminate line */
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res = process_line(ht, &s[0], nl - &s[0]);
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if (res != NSERROR_OK) {
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inflateEnd(&strm);
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return res;
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}
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/* move data down */
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memmove(&s[0], nl + 1, used - ((nl + 1) - &s[0]) );
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used -= ((nl +1) - &s[0]);
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}
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if (used == sizeof(s)) {
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/* entire buffer used and no newline */
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NSLOG(netsurf, INFO, "Overlength line");
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used = 0;
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}
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} while (ret != Z_STREAM_END);
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inflateEnd(&strm);
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if (ret != Z_STREAM_END) {
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NSLOG(netsurf, INFO, "inflate returned %d", ret);
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return NSERROR_INVALID;
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}
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return NSERROR_OK;
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return hash_add_inline_plain(ht, data, size);
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}
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