StringUtils.h

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#pragma once
 
#include <cctype>
#include <cstddef>
 
namespace cdc::core {

inline const char* skipSpaces(const char* s) {
    while (s && *s && std::isspace(static_cast<unsigned char>(*s))) {
        s++;
    }
    return s;
}

inline const char* nextToken(const char* s, char* out, size_t outSize) {
    if (!out || outSize == 0) return nullptr;
    s = skipSpaces(s);
    if (!s || !*s) return nullptr;
    size_t i = 0;
    while (*s && i + 1 < outSize) {
        if (*s == '\\' && *(s + 1) == ' ') {
            out[i++] = ' ';
            s += 2;
            continue;
        }
        if (std::isspace(static_cast<unsigned char>(*s))) break;
        out[i++] = *s++;
    }
    out[i] = '\0';
    while (*s) {
        if (*s == '\\' && *(s + 1) == ' ') {
            s += 2;
            continue;
        }
        if (std::isspace(static_cast<unsigned char>(*s))) break;
        s++;
    }
    return s;
}

inline void unescapeSpaces(char* s) {
    if (!s) return;
    char* w = s;
    for (const char* r = s; *r; ) {
        if (*r == '\\' && *(r + 1) == ' ') {
            *w++ = ' ';
            r += 2;
        } else {
            *w++ = *r++;
        }
    }
    *w = '\0';
}
 
} // namespace cdc::core