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Use more idiomatic C++ to quote JSON strings

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This commit is contained in:
Eric Fischer 2016-12-08 14:02:06 -08:00
parent 5960a15fcd
commit e3823c966c
1 changed files with 11 additions and 16 deletions
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27
mbtiles.cpp
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@ -86,26 +86,21 @@ void mbtiles_write_tile(sqlite3 *outdb, int z, int tx, int ty, const char *data,
}
}
static void quote(std::string *buf, const char *s) {
char tmp[strlen(s) * 8 + 1];
char *out = tmp;
for (; *s != '\0'; s++) {
unsigned char ch = (unsigned char) *s;
static void quote(std::string &buf, std::string const &s) {
for (size_t i = 0; i < s.size(); i++) {
unsigned char ch = s[i];
if (ch == '\\' || ch == '\"') {
*out++ = '\\';
*out++ = ch;
buf.push_back('\\');
buf.push_back(ch);
} else if (ch < ' ') {
sprintf(out, "\\u%04x", ch);
out = out + strlen(out);
char tmp[7];
sprintf(tmp, "\\u%04x", ch);
buf.append(std::string(tmp));
} else {
*out++ = ch;
buf.push_back(ch);
}
}
*out = '\0';
buf->append(tmp, strlen(tmp));
}
void aprintf(std::string *buf, const char *format, ...) {
@ -243,7 +238,7 @@ void mbtiles_write_metadata(sqlite3 *outdb, const char *fname, int minzoom, int
auto fk = layermap.find(lnames[i]);
aprintf(&buf, "{ \"id\": \"");
quote(&buf, lnames[i].c_str());
quote(buf, lnames[i]);
aprintf(&buf, "\", \"description\": \"\", \"minzoom\": %d, \"maxzoom\": %d, \"fields\": {", fk->second.minzoom, fk->second.maxzoom);
std::set<type_and_string>::iterator j;
@ -256,7 +251,7 @@ void mbtiles_write_metadata(sqlite3 *outdb, const char *fname, int minzoom, int
}
aprintf(&buf, "\"");
quote(&buf, j->string.c_str());
quote(buf, j->string);
if (j->type == VT_NUMBER) {
aprintf(&buf, "\": \"Number\"");