Hash :
22119e26
Author :
Thomas de Grivel
Date :
2022-01-02T11:43:22
wip
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/*
* kv - key value text file format
*
* Copyright 2022 Thomas de Grivel
*/
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include "kv.h"
int kv_check_delimiter (const char *delim)
{
assert(delim);
return kv_contains_reserved_char(delim, strlen(delim));
}
int kv_contains_delimiter (const char *str, size_t str_size,
const char *delim)
{
size_t dsz;
assert(str);
assert(delim);
dsz = strlen(delim);
while (str_size >= 4) {
if (str[0] == '\n' && str[1] == '"' && str[2] == '"' &&
str[3] == '"')
return 1;
str++;
str_size--;
}
return 0;
}
int kv_contains_reserved_char (const char *str, size_t str_size)
{
while (str_size) {
if (kv_is_reserved_char(str[0]))
return 1;
str++;
str_size--;
}
return 0;
}
int kv_contains_triple_double_quotes (const char *str, size_t str_size)
{
while (str_size >= 4) {
if (str[0] == '\n' && str[1] == '"' && str[2] == '"' &&
str[3] == '"')
return 1;
str++;
str_size--;
}
return 0;
}
int kv_needs_quoting (const char *str, size_t str_size)
{
if (str_size == 0 ||
(str[0] != '<' && !kv_contains_reserved_char(str, str_size)))
return 0;
return 1;
}
const char *delims[] = {
"END",
"---",
"___",
"===",
"***",
"+++",
"!!!",
"###",
"-END-",
"_END_",
"=END=",
"*END*",
"+END+",
"!END!",
"#END#",
NULL
};
int kv_quote (char **str, size_t *str_size)
{
int r;
char *str_delim;
size_t str_delim_size;
char *str_triple;
size_t str_triple_size;
assert(str);
assert(*str);
assert(str_size);
if (!kv_needs_quoting(*str, *str_size))
return 0;
str_triple = *str;
str_triple_size = *str_size;
r = kv_quote_triple_double_quotes(&str_triple, &str_triple_size);
if (r <= 0)
return r;
str_delim = *str;
str_delim_size = *str_size;
r = kv_quote_delim(&str_delim, &str_delim_size, "END");
if (r <= 0)
return r;
if (r) {
return r;
if (r) {
r = kv_quote_delim(&str_delim, &str_delim_size, "#END#");
if (r <= 0)
return r;
if (r) {
r = kv_quote_delim(&str_delim, &str_delim_size, "+EOF+");
if (r <= 0)
return r;
return -1;
}
int kv_quote_triple_double_quotes (char **str, size_t *str_size)
{
char *e;
char *s;
if (kv_contains_triple_double_quotes(*str, *str_size))
return 1;
s = calloc(*str_size + 9, 1);
if (!s)
return -1;
s[0] = '"'; s[1] = '"'; s[2] = '"'; s[3] = '\n';
memcpy(s + 4, *str, *str_size);
e = s + 4 + *str_size;
e[0] = '\n'; e[1] = '"'; e[2] = '"'; e[3] = '"'; e[4] = 0;
*str = e;
*str_size = *str_size + 8;
return 0;
}