diff options
Diffstat (limited to 'src/mds-kbdc.c')
| -rw-r--r-- | src/mds-kbdc.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/src/mds-kbdc.c b/src/mds-kbdc.c index 0e33bc6..1969dc8 100644 --- a/src/mds-kbdc.c +++ b/src/mds-kbdc.c @@ -26,6 +26,7 @@ #include <errno.h> #include <unistd.h> #include <stdio.h> +#include <string.h> @@ -100,6 +101,53 @@ static char* read_file(const char* restrict pathname, size_t* restrict size) /** + * Remove non-functional code (comments and empty lines) from the content + * + * @param content The code to shrink + * @param size The size of `content`, in char:s + * @return The new size of `content`, in char:s; this function cannot fail + */ +static size_t shrink_file(char* restrict content, size_t size) +{ +#define t content[n_ptr++] = c +#define last content[n_ptr - 1] + + size_t n_ptr = 0, o_ptr = 0; + int comment = 0, quote = 0, escape = 0; + + while (o_ptr < size) + { + char c = content[o_ptr++]; + if (comment) + { + if (c == '\n') comment = 0; + } + else if (escape) t, escape = 0; + else if (quote) + { + t; + if (c == '\\') escape = 1; + else if (c == '"') quote = 0; + } + else if (c == '#') comment = 1; + else if (c == '"') t, quote = 1; + else if (!strchr("\n ", c) || !n_ptr || (last != c)) + { + /* Store data, but remove unnecessary new lines and unnecessary spaces. */ + if ((c == '\n') && n_ptr && (last == ' ')) n_ptr--; + if ((c == ' ') && n_ptr && (last == '\n')) continue; + t; + } + } + + return n_ptr; + +#undef last +#undef t +} + + +/** * Compile a keyboard layout file * * @param argc_ The number of elements in `argv_` @@ -115,8 +163,12 @@ int main(int argc_, char** argv_) argc = argc_; argv = argv_; + /* Read the file. */ content = read_file(pathname, &content_size); fail_if (content == NULL); + /* Remove comments and empty lines. */ + content_size = shrink_file(content, content_size); + fail_if (xrealloc(content, content_size, char)); return 0; |