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#include "text.hpp"
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
/**
* Returns an empty string if `s` is valid utf8;
* otherwise returns an error message.
*/
std::string check_utf8(std::string s) {
for (size_t i = 0; i < s.size(); i++) {
size_t fail = 0;
if ((s[i] & 0x80) == 0x80) {
if ((s[i] & 0xE0) == 0xC0) {
if (i + 1 >= s.size() || (s[i + 1] & 0xC0) != 0x80) {
fail = 2;
} else {
i += 1;
}
} else if ((s[i] & 0xF0) == 0xE0) {
if (i + 2 >= s.size() || (s[i + 1] & 0xC0) != 0x80 || (s[i + 2] & 0xC0) != 0x80) {
fail = 3;
} else {
i += 2;
}
} else if ((s[i] & 0xF8) == 0xF0) {
if (i + 3 >= s.size() || (s[i + 1] & 0xC0) != 0x80 || (s[i + 2] & 0xC0) != 0x80 || (s[i + 3] & 0xC0) != 0x80) {
fail = 4;
} else {
i += 3;
}
} else {
fail = 1;
}
}
if (fail != 0) {
std::string out = "\"" + s + "\" is not valid UTF-8 (";
for (size_t j = 0; j < fail && i + j < s.size(); j++) {
if (j != 0) {
out += " ";
}
char tmp[6];
sprintf(tmp, "0x%02X", s[i + j] & 0xFF);
out += std::string(tmp);
}
out += ")";
return out;
}
}
return "";
}
const char *utf8_next(const char *s, long *c) {
if (s == NULL) {
*c = -1;
return NULL;
}
if (*s == '\0') {
*c = -1;
return NULL;
}
if ((s[0] & 0x80) == 0x80) {
if ((s[0] & 0xE0) == 0xC0) {
if ((s[1] & 0xC0) != 0x80) {
*c = 0xFFFD;
s++;
} else {
*c = ((long) (s[0] & 0x1F) << 6) | ((long) (s[1] & 0x7F));
s += 2;
}
} else if ((s[0] & 0xF0) == 0xE0) {
if ((s[1] & 0xC0) != 0x80 || (s[2] & 0xC0) != 0x80) {
*c = 0xFFFD;
s++;
} else {
*c = ((long) (s[0] & 0x0F) << 12) | ((long) (s[1] & 0x7F) << 6) | ((long) (s[2] & 0x7F));
s += 3;
}
} else if ((s[0] & 0xF8) == 0xF0) {
if ((s[1] & 0xC0) != 0x80 || (s[2] & 0xC0) != 0x80 || (s[3] & 0xC0) != 0x80) {
*c = 0xFFFD;
s++;
} else {
*c = ((long) (s[0] & 0x0F) << 18) | ((long) (s[1] & 0x7F) << 12) | ((long) (s[2] & 0x7F) << 6) | ((long) (s[3] & 0x7F));
s += 4;
}
} else {
*c = 0xFFFD;
s++;
}
} else {
*c = s[0];
s++;
}
return s;
}
std::string truncate16(std::string const &s, size_t runes) {
const char *cp = s.c_str();
const char *start = cp;
const char *lastgood = cp;
size_t len = 0;
long c;
while ((cp = utf8_next(cp, &c)) != NULL) {
if (c <= 0xFFFF) {
len++;
} else {
len += 2;
}
if (len <= runes) {
lastgood = cp;
} else {
break;
}
}
return std::string(s, 0, lastgood - start);
}
int integer_zoom(std::string where, std::string text) {
double d = atof(text.c_str());
if (!isfinite(d) || d != floor(d) || d < 0 || d > 32) {
fprintf(stderr, "%s: Expected integer zoom level in \"tippecanoe\" GeoJSON extension, not %s\n", where.c_str(), text.c_str());
exit(EXIT_FAILURE);
}
return d;
}
std::string format_commandline(int argc, char **argv) {
std::string out;
for (int i = 0; i < argc; i++) {
bool need_quote = false;
for (char *cp = argv[i]; *cp != '\0'; cp++) {
if (!isalpha(*cp) && !isdigit(*cp) &&
*cp != '/' && *cp != '-' && *cp != '_' && *cp != '@' && *cp != ':' &&
*cp != '.' && *cp != '%' && *cp != ',') {
need_quote = true;
break;
}
}
if (need_quote) {
out.push_back('\'');
for (char *cp = argv[i]; *cp != '\0'; cp++) {
if (*cp == '\'') {
out.append("'\"'\"'");
} else {
out.push_back(*cp);
}
}
out.push_back('\'');
} else {
out.append(argv[i]);
}
if (i + 1 < argc) {
out.push_back(' ');
}
}
return out;
}
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