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| 880 | |
| 881 | //------------------------------------------------------------------------------ |
| 882 | inline void formatImpl(std::ostream& out, const char* fmt, |
| 883 | const detail::FormatArg* args, |
| 884 | int numArgs) |
| 885 | { |
| 886 | // Saved stream state |
| 887 | std::streamsize origWidth = out.width(); |
| 888 | std::streamsize origPrecision = out.precision(); |
| 889 | std::ios::fmtflags origFlags = out.flags(); |
| 890 | char origFill = out.fill(); |
| 891 | |
| 892 | // "Positional mode" means all format specs should be of the form "%n$..." |
| 893 | // with `n` an integer. We detect this in `streamStateFromFormat`. |
| 894 | bool positionalMode = false; |
| 895 | int argIndex = 0; |
| 896 | while (true) { |
| 897 | fmt = printFormatStringLiteral(out, fmt); |
| 898 | if (*fmt == '\0') { |
| 899 | if (!positionalMode && argIndex < numArgs) { |
| 900 | TINYFORMAT_ERROR("tinyformat: Not enough conversion specifiers in format string"); |
| 901 | } |
| 902 | break; |
| 903 | } |
| 904 | bool spacePadPositive = false; |
| 905 | int ntrunc = -1; |
| 906 | const char* fmtEnd = streamStateFromFormat(out, positionalMode, spacePadPositive, ntrunc, fmt, |
| 907 | args, argIndex, numArgs); |
| 908 | // NB: argIndex may be incremented by reading variable width/precision |
| 909 | // in `streamStateFromFormat`, so do the bounds check here. |
| 910 | if (argIndex >= numArgs) { |
| 911 | TINYFORMAT_ERROR("tinyformat: Too many conversion specifiers in format string"); |
| 912 | return; |
| 913 | } |
| 914 | const FormatArg& arg = args[argIndex]; |
| 915 | // Format the arg into the stream. |
| 916 | if (!spacePadPositive) { |
| 917 | arg.format(out, fmt, fmtEnd, ntrunc); |
| 918 | } |
| 919 | else { |
| 920 | // The following is a special case with no direct correspondence |
| 921 | // between stream formatting and the printf() behaviour. Simulate |
| 922 | // it crudely by formatting into a temporary string stream and |
| 923 | // munging the resulting string. |
| 924 | std::ostringstream tmpStream; |
| 925 | tmpStream.copyfmt(out); |
| 926 | tmpStream.setf(std::ios::showpos); |
| 927 | arg.format(tmpStream, fmt, fmtEnd, ntrunc); |
| 928 | std::string result = tmpStream.str(); // allocates... yuck. |
| 929 | for (size_t i = 0, iend = result.size(); i < iend; ++i) { |
| 930 | if (result[i] == '+') |
| 931 | result[i] = ' '; |
| 932 | } |
| 933 | out << result; |
| 934 | } |
| 935 | if (!positionalMode) |
| 936 | ++argIndex; |
| 937 | fmt = fmtEnd; |
| 938 | } |
| 939 |
no test coverage detected