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8a19f60386
- Reorder README to have implementation list after "learning tool" bullet. - This also moves tests/ and libs/ into impls. It would be preferrable to have these directories at the top level. However, this causes difficulties with the wasm implementations which need pre-open directories and have trouble with paths starting with "../../". So in lieu of that, symlink those directories to the top-level. - Move the run_argv_test.sh script into the tests directory for general hygiene.
89 lines
2.0 KiB
C++
89 lines
2.0 KiB
C++
#include "Debug.h"
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#include "String.h"
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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// Adapted from: http://stackoverflow.com/questions/2342162
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String stringPrintf(const char* fmt, ...) {
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int size = strlen(fmt); // make a guess
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String str;
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va_list ap;
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while (1) {
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str.resize(size);
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va_start(ap, fmt);
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int n = vsnprintf((char *)str.data(), size, fmt, ap);
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va_end(ap);
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if (n > -1 && n < size) { // Everything worked
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str.resize(n);
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return str;
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}
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if (n > -1) // Needed size returned
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size = n + 1; // For null char
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else
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size *= 2; // Guess at a larger size (OS specific)
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}
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return str;
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}
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String copyAndFree(char* mallocedString)
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{
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String ret(mallocedString);
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free(mallocedString);
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return ret;
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}
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String escape(const String& in)
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{
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String out;
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out.reserve(in.size() * 2 + 2); // each char may get escaped + two "'s
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out += '"';
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for (auto it = in.begin(), end = in.end(); it != end; ++it) {
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char c = *it;
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switch (c) {
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case '\\': out += "\\\\"; break;
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case '\n': out += "\\n"; break;
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case '"': out += "\\\""; break;
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default: out += c; break;
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};
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}
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out += '"';
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out.shrink_to_fit();
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return out;
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}
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static char unescape(char c)
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{
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switch (c) {
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case '\\': return '\\';
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case 'n': return '\n';
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case '"': return '"';
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default: return c;
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}
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}
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String unescape(const String& in)
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{
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String out;
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out.reserve(in.size()); // unescaped string will always be shorter
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// in will have double-quotes at either end, so move the iterators in
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for (auto it = in.begin()+1, end = in.end()-1; it != end; ++it) {
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char c = *it;
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if (c == '\\') {
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++it;
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if (it != end) {
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out += unescape(*it);
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}
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}
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else {
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out += c;
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}
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}
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out.shrink_to_fit();
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return out;
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}
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