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html: list counter style: Split out symbol copy.

This commit is contained in:
Michael Drake 2021-02-02 15:04:09 +00:00
parent 60d9dbe390
commit 87b5fd1bcc
1 changed files with 36 additions and 36 deletions
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72
content/handlers/html/list_counter_style.c
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@ -41,14 +41,39 @@ struct list_counter_style {
const unsigned int length;
const symbol_t value;
} pad;
const char *prefix;
const char *postfix;
symbol_t prefix;
symbol_t postfix;
const symbol_t *symbols; /**< array of symbols which represent this style */
const int *weights; /**< symbol weights for additive schemes */
const size_t items; /**< items in symbol and weight table */
size_t (*calc)(uint8_t *ares, const size_t alen, int value, const struct list_counter_style *cstyle); /**< function to calculate the system */
};
/**
* Copy a UTF-8 symbol to buffer at offset, if there is space
*
* \param[in] buf The output buffer
* \param[in] buflen The length of \a buf
* \param[in] pos Current position in \a buf
* \param[in] symbol The symbol to copy into \a buf
* \return The number of bytes needed in the output buffer which may be
* larger than \a buflen but the buffer will not be overrun
*/
static inline size_t
copy_symbol(char *buf, const size_t buflen, size_t pos, const symbol_t symbol)
{
size_t sidx = 0; /* current symbol index */
while ((sidx < sizeof(symbol_t)) && (symbol[sidx] != '\0')) {
if (pos < buflen) {
buf[pos] = symbol[sidx];
}
pos++;
sidx++;
}
return sidx;
}
/**
* maps alphabet values to output values with a symbol table
@ -71,53 +96,28 @@ map_aval_to_symbols(char *buf, const size_t buflen,
const struct list_counter_style *cstyle)
{
size_t oidx = 0;
size_t pidx; /* padding index */
size_t aidx; /* numeral index */
size_t sidx; /* current symbol index */
const char *postfix = "."; /* default postfix string */
const symbol_t postfix = "."; /* default postfix string */
/* add padding if required */
if (alen < cstyle->pad.length) {
size_t pidx; /* padding index */
for (pidx=cstyle->pad.length - alen; pidx > 0; pidx--) {
sidx=0;
while ((sidx < 4) &&
(cstyle->pad.value[sidx] != 0)) {
if (oidx < buflen) {
buf[oidx] = cstyle->pad.value[sidx];
}
oidx++;
sidx++;
}
oidx += copy_symbol(buf, buflen, oidx,
cstyle->pad.value);
}
}
/* map symbols */
for (aidx=0; aidx < alen; aidx++) {
sidx=0;
while ((sidx < 4) &&
(cstyle->symbols[aval[aidx]][sidx] != 0)) {
if (oidx < buflen) {
buf[oidx] = cstyle->symbols[aval[aidx]][sidx];
}
oidx++;
sidx++;
}
oidx += copy_symbol(buf, buflen, oidx,
cstyle->symbols[aval[aidx]]);
}
/* postfix */
if (cstyle->postfix != NULL) {
postfix = cstyle->postfix;
}
sidx=0;
while ((sidx < 4) &&
(postfix[sidx] != 0)) {
if (oidx < buflen) {
buf[oidx] = postfix[sidx];
}
oidx++;
sidx++;
}
oidx += copy_symbol(buf, buflen, oidx,
(cstyle->postfix[0] != '\0') ?
cstyle->postfix : postfix);
return oidx;
}