Move code around
This commit is contained in:
Behdad Esfahbod
parent
785982bf83
commit
72364103bc
250
src/hb-common.cc
250
src/hb-common.cc
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@ -605,3 +605,253 @@ hb_version_atleast (unsigned int major,
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{
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return HB_VERSION_ATLEAST (major, minor, micro);
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}
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/* hb_feature_t */
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static bool
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parse_space (const char **pp, const char *end)
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{
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while (*pp < end && ISSPACE (**pp))
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(*pp)++;
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return true;
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}
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static bool
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parse_char (const char **pp, const char *end, char c)
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{
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parse_space (pp, end);
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if (*pp == end || **pp != c)
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return false;
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(*pp)++;
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return true;
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}
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static bool
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parse_uint (const char **pp, const char *end, unsigned int *pv)
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{
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char buf[32];
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unsigned int len = MIN (ARRAY_LENGTH (buf) - 1, (unsigned int) (end - *pp));
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strncpy (buf, *pp, len);
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buf[len] = '\0';
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char *p = buf;
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char *pend = p;
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unsigned int v;
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/* Intentionally use strtol instead of strtoul, such that
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* -1 turns into "big number"... */
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errno = 0;
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v = strtol (p, &pend, 0);
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if (errno || p == pend)
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return false;
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*pv = v;
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*pp += pend - p;
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return true;
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}
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static bool
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parse_bool (const char **pp, const char *end, unsigned int *pv)
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{
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parse_space (pp, end);
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const char *p = *pp;
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while (*pp < end && ISALPHA(**pp))
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(*pp)++;
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/* CSS allows on/off as aliases 1/0. */
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if (*pp - p == 2 || 0 == strncmp (p, "on", 2))
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*pv = 1;
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else if (*pp - p == 3 || 0 == strncmp (p, "off", 2))
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*pv = 0;
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else
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return false;
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return true;
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}
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static bool
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parse_feature_value_prefix (const char **pp, const char *end, hb_feature_t *feature)
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{
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if (parse_char (pp, end, '-'))
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feature->value = 0;
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else {
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parse_char (pp, end, '+');
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feature->value = 1;
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}
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return true;
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}
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static bool
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parse_feature_tag (const char **pp, const char *end, hb_feature_t *feature)
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{
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parse_space (pp, end);
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char quote = 0;
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if (*pp < end && (**pp == '\'' || **pp == '"'))
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{
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quote = **pp;
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(*pp)++;
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}
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const char *p = *pp;
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while (*pp < end && ISALNUM(**pp))
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(*pp)++;
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if (p == *pp || *pp - p > 4)
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return false;
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feature->tag = hb_tag_from_string (p, *pp - p);
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if (quote)
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{
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/* CSS expects exactly four bytes. And we only allow quotations for
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* CSS compatibility. So, enforce the length. */
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if (*pp - p != 4)
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return false;
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if (*pp == end || **pp != quote)
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return false;
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(*pp)++;
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}
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return true;
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}
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static bool
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parse_feature_indices (const char **pp, const char *end, hb_feature_t *feature)
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{
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parse_space (pp, end);
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bool has_start;
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feature->start = 0;
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feature->end = (unsigned int) -1;
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if (!parse_char (pp, end, '['))
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return true;
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has_start = parse_uint (pp, end, &feature->start);
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if (parse_char (pp, end, ':')) {
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parse_uint (pp, end, &feature->end);
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} else {
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if (has_start)
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feature->end = feature->start + 1;
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}
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return parse_char (pp, end, ']');
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}
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static bool
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parse_feature_value_postfix (const char **pp, const char *end, hb_feature_t *feature)
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{
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bool had_equal = parse_char (pp, end, '=');
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bool had_value = parse_uint (pp, end, &feature->value) ||
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parse_bool (pp, end, &feature->value);
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/* CSS doesn't use equal-sign between tag and value.
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* If there was an equal-sign, then there *must* be a value.
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* A value without an eqaul-sign is ok, but not required. */
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return !had_equal || had_value;
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}
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static bool
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parse_one_feature (const char **pp, const char *end, hb_feature_t *feature)
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{
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return parse_feature_value_prefix (pp, end, feature) &&
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parse_feature_tag (pp, end, feature) &&
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parse_feature_indices (pp, end, feature) &&
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parse_feature_value_postfix (pp, end, feature) &&
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parse_space (pp, end) &&
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*pp == end;
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}
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/**
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* hb_feature_from_string:
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* @str: (array length=len) (element-type uint8_t): a string to parse
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* @len: length of @str, or -1 if string is %NULL terminated
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* @feature: (out): the #hb_feature_t to initialize with the parsed values
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*
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* Parses a string into a #hb_feature_t.
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*
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* TODO: document the syntax here.
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*
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* Return value:
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* %true if @str is successfully parsed, %false otherwise.
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*
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* Since: 0.9.5
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**/
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hb_bool_t
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hb_feature_from_string (const char *str, int len,
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hb_feature_t *feature)
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{
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hb_feature_t feat;
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if (len < 0)
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len = strlen (str);
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if (likely (parse_one_feature (&str, str + len, &feat)))
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{
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if (feature)
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*feature = feat;
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return true;
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}
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if (feature)
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memset (feature, 0, sizeof (*feature));
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return false;
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}
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/**
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* hb_feature_to_string:
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* @feature: an #hb_feature_t to convert
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* @buf: (array length=size) (out): output string
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* @size: the allocated size of @buf
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*
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* Converts a #hb_feature_t into a %NULL-terminated string in the format
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* understood by hb_feature_from_string(). The client in responsible for
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* allocating big enough size for @buf, 128 bytes is more than enough.
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*
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* Since: 0.9.5
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**/
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void
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hb_feature_to_string (hb_feature_t *feature,
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char *buf, unsigned int size)
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{
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if (unlikely (!size)) return;
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char s[128];
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unsigned int len = 0;
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if (feature->value == 0)
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s[len++] = '-';
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hb_tag_to_string (feature->tag, s + len);
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len += 4;
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while (len && s[len - 1] == ' ')
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len--;
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if (feature->start != 0 || feature->end != (unsigned int) -1)
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{
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s[len++] = '[';
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if (feature->start)
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len += MAX (0, snprintf (s + len, ARRAY_LENGTH (s) - len, "%u", feature->start));
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if (feature->end != feature->start + 1) {
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s[len++] = ':';
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if (feature->end != (unsigned int) -1)
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len += MAX (0, snprintf (s + len, ARRAY_LENGTH (s) - len, "%u", feature->end));
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}
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s[len++] = ']';
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}
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if (feature->value > 1)
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{
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s[len++] = '=';
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len += MAX (0, snprintf (s + len, ARRAY_LENGTH (s) - len, "%u", feature->value));
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}
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assert (len < ARRAY_LENGTH (s));
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len = MIN (len, size - 1);
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memcpy (buf, s, len);
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buf[len] = '\0';
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}
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@ -362,6 +362,24 @@ typedef struct hb_user_data_key_t {
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typedef void (*hb_destroy_func_t) (void *user_data);
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/* Font features. */
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typedef struct hb_feature_t {
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hb_tag_t tag;
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uint32_t value;
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unsigned int start;
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unsigned int end;
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} hb_feature_t;
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HB_EXTERN hb_bool_t
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hb_feature_from_string (const char *str, int len,
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hb_feature_t *feature);
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HB_EXTERN void
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hb_feature_to_string (hb_feature_t *feature,
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char *buf, unsigned int size);
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HB_END_DECLS
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#endif /* HB_COMMON_H */
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248
src/hb-shape.cc
248
src/hb-shape.cc
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@ -45,254 +45,6 @@
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* contains the output glyphs and their positions.
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**/
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static bool
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parse_space (const char **pp, const char *end)
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{
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while (*pp < end && ISSPACE (**pp))
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(*pp)++;
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return true;
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}
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static bool
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parse_char (const char **pp, const char *end, char c)
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{
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parse_space (pp, end);
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if (*pp == end || **pp != c)
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return false;
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(*pp)++;
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return true;
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}
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static bool
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parse_uint (const char **pp, const char *end, unsigned int *pv)
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{
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char buf[32];
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unsigned int len = MIN (ARRAY_LENGTH (buf) - 1, (unsigned int) (end - *pp));
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strncpy (buf, *pp, len);
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buf[len] = '\0';
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char *p = buf;
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char *pend = p;
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unsigned int v;
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/* Intentionally use strtol instead of strtoul, such that
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* -1 turns into "big number"... */
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errno = 0;
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v = strtol (p, &pend, 0);
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if (errno || p == pend)
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return false;
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*pv = v;
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*pp += pend - p;
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return true;
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}
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static bool
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parse_bool (const char **pp, const char *end, unsigned int *pv)
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{
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parse_space (pp, end);
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const char *p = *pp;
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while (*pp < end && ISALPHA(**pp))
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(*pp)++;
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/* CSS allows on/off as aliases 1/0. */
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if (*pp - p == 2 || 0 == strncmp (p, "on", 2))
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*pv = 1;
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else if (*pp - p == 3 || 0 == strncmp (p, "off", 2))
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*pv = 0;
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else
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return false;
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return true;
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}
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static bool
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parse_feature_value_prefix (const char **pp, const char *end, hb_feature_t *feature)
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{
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if (parse_char (pp, end, '-'))
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feature->value = 0;
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else {
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parse_char (pp, end, '+');
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feature->value = 1;
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}
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return true;
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}
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static bool
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parse_feature_tag (const char **pp, const char *end, hb_feature_t *feature)
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{
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parse_space (pp, end);
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char quote = 0;
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if (*pp < end && (**pp == '\'' || **pp == '"'))
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{
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quote = **pp;
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(*pp)++;
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}
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const char *p = *pp;
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while (*pp < end && ISALNUM(**pp))
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(*pp)++;
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if (p == *pp || *pp - p > 4)
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return false;
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feature->tag = hb_tag_from_string (p, *pp - p);
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if (quote)
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{
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/* CSS expects exactly four bytes. And we only allow quotations for
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* CSS compatibility. So, enforce the length. */
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if (*pp - p != 4)
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return false;
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if (*pp == end || **pp != quote)
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return false;
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(*pp)++;
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}
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return true;
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}
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static bool
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parse_feature_indices (const char **pp, const char *end, hb_feature_t *feature)
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{
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parse_space (pp, end);
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bool has_start;
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feature->start = 0;
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feature->end = (unsigned int) -1;
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if (!parse_char (pp, end, '['))
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return true;
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has_start = parse_uint (pp, end, &feature->start);
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if (parse_char (pp, end, ':')) {
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parse_uint (pp, end, &feature->end);
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} else {
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if (has_start)
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feature->end = feature->start + 1;
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}
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return parse_char (pp, end, ']');
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}
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static bool
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parse_feature_value_postfix (const char **pp, const char *end, hb_feature_t *feature)
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{
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bool had_equal = parse_char (pp, end, '=');
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bool had_value = parse_uint (pp, end, &feature->value) ||
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parse_bool (pp, end, &feature->value);
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/* CSS doesn't use equal-sign between tag and value.
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* If there was an equal-sign, then there *must* be a value.
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* A value without an eqaul-sign is ok, but not required. */
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return !had_equal || had_value;
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}
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static bool
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parse_one_feature (const char **pp, const char *end, hb_feature_t *feature)
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{
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return parse_feature_value_prefix (pp, end, feature) &&
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parse_feature_tag (pp, end, feature) &&
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parse_feature_indices (pp, end, feature) &&
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parse_feature_value_postfix (pp, end, feature) &&
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parse_space (pp, end) &&
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*pp == end;
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}
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/**
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* hb_feature_from_string:
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* @str: (array length=len) (element-type uint8_t): a string to parse
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* @len: length of @str, or -1 if string is %NULL terminated
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* @feature: (out): the #hb_feature_t to initialize with the parsed values
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*
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* Parses a string into a #hb_feature_t.
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*
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* TODO: document the syntax here.
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*
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* Return value:
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* %true if @str is successfully parsed, %false otherwise.
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*
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* Since: 0.9.5
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**/
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hb_bool_t
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hb_feature_from_string (const char *str, int len,
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hb_feature_t *feature)
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{
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hb_feature_t feat;
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if (len < 0)
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len = strlen (str);
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if (likely (parse_one_feature (&str, str + len, &feat)))
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{
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if (feature)
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*feature = feat;
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return true;
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}
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if (feature)
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memset (feature, 0, sizeof (*feature));
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return false;
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}
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/**
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* hb_feature_to_string:
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* @feature: an #hb_feature_t to convert
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* @buf: (array length=size) (out): output string
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* @size: the allocated size of @buf
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*
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* Converts a #hb_feature_t into a %NULL-terminated string in the format
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* understood by hb_feature_from_string(). The client in responsible for
|
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* allocating big enough size for @buf, 128 bytes is more than enough.
|
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*
|
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* Since: 0.9.5
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**/
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void
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hb_feature_to_string (hb_feature_t *feature,
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char *buf, unsigned int size)
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{
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if (unlikely (!size)) return;
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char s[128];
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unsigned int len = 0;
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if (feature->value == 0)
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s[len++] = '-';
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hb_tag_to_string (feature->tag, s + len);
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len += 4;
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while (len && s[len - 1] == ' ')
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len--;
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if (feature->start != 0 || feature->end != (unsigned int) -1)
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{
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s[len++] = '[';
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if (feature->start)
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len += MAX (0, snprintf (s + len, ARRAY_LENGTH (s) - len, "%u", feature->start));
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if (feature->end != feature->start + 1) {
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s[len++] = ':';
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if (feature->end != (unsigned int) -1)
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len += MAX (0, snprintf (s + len, ARRAY_LENGTH (s) - len, "%u", feature->end));
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}
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s[len++] = ']';
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}
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if (feature->value > 1)
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{
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||||
s[len++] = '=';
|
||||
len += MAX (0, snprintf (s + len, ARRAY_LENGTH (s) - len, "%u", feature->value));
|
||||
}
|
||||
assert (len < ARRAY_LENGTH (s));
|
||||
len = MIN (len, size - 1);
|
||||
memcpy (buf, s, len);
|
||||
buf[len] = '\0';
|
||||
}
|
||||
|
||||
|
||||
static const char **static_shaper_list;
|
||||
|
||||
#ifdef HB_USE_ATEXIT
|
||||
|
|
|
|||
|
|
@ -40,22 +40,6 @@
|
|||
HB_BEGIN_DECLS
|
||||
|
||||
|
||||
typedef struct hb_feature_t {
|
||||
hb_tag_t tag;
|
||||
uint32_t value;
|
||||
unsigned int start;
|
||||
unsigned int end;
|
||||
} hb_feature_t;
|
||||
|
||||
HB_EXTERN hb_bool_t
|
||||
hb_feature_from_string (const char *str, int len,
|
||||
hb_feature_t *feature);
|
||||
|
||||
HB_EXTERN void
|
||||
hb_feature_to_string (hb_feature_t *feature,
|
||||
char *buf, unsigned int size);
|
||||
|
||||
|
||||
HB_EXTERN void
|
||||
hb_shape (hb_font_t *font,
|
||||
hb_buffer_t *buffer,
|
||||
|
|
|
|||
Loading…
Reference in New Issue