Deal with DOS (\r \n) and classic Mac OS (\r) (physical) line endings. In case of CR LF skip (but count) the CR and return LF. In case of CR not followed by LF turns the CR into LF and returns that. All other chars are returned as is. Note: never returns a CR (\r). */
| 106 | Note: never returns a CR (\r). |
| 107 | */ |
| 108 | static int normalize_newline(void) |
| 109 | { |
| 110 | /* No need to recognize Unicode code points here. */ |
| 111 | int cc = getchar(); |
| 112 | |
| 113 | if (cc == '\r') { |
| 114 | // Maybe \r \n (CR NL) combination? |
| 115 | int nc = getchar(); |
| 116 | if (nc == '\n') { |
| 117 | char_count++; // counts the carriage return |
| 118 | utf8_count++; |
| 119 | // No use incrementing column. |
| 120 | return nc; // effectively skip the \r |
| 121 | } |
| 122 | // Mind nc not \n. |
| 123 | if (nc != EOF) ungetc(nc, stdin); |
| 124 | // cc == '\r'; consider a newline as well, so turn into \n: |
| 125 | cc = '\n'; |
| 126 | } |
| 127 | return cc; |
| 128 | } |
| 129 | |
| 130 | /* Detects escaped newlines (line continuations) and signals them with the |
| 131 | special '\r' character (that otherwise is not used). |