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diff lwcc/preproc.c @ 307:9e342c4e4b66 ccdev
Added support for __LINE__, __FILE__, __DATE__, and __TIME__
Added support for the standard __LINE__, __FILE__, __DATE__, and __TIME
"macros" and updated the readme form lwcc to reflect the current development
state.
Note: attempts to define these four macros will succeed but the definitions
will be ignored.
| author | William Astle <lost@l-w.ca> |
|---|---|
| date | Sat, 21 Sep 2013 12:27:48 -0600 |
| parents | b08787e5b9f3 |
| children | 670ea8f90212 |
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--- a/lwcc/preproc.c Wed Sep 18 20:41:41 2013 -0600 +++ b/lwcc/preproc.c Sat Sep 21 12:27:48 2013 -0600 @@ -22,6 +22,7 @@ #include <stdio.h> #include <stdlib.h> #include <string.h> +#include <time.h> #include <unistd.h> #include <lw_alloc.h> @@ -1334,7 +1335,67 @@ struct token_list *expand_list; int repl; struct token_list *rtl; - + + // check for built in macros + if (strcmp(mname, "__FILE__") == 0) + { + struct strbuf *sb; + + sb = strbuf_new(); + strbuf_add(sb, '"'); + for (tstr = (char *)(pp -> fn); *tstr; tstr++) + { + if (*tstr == 32 || (*tstr > 34 && *tstr < 127)) + { + strbuf_add(sb, *tstr); + } + else + { + strbuf_add(sb, '\\'); + strbuf_add(sb, (*tstr >> 6) + '0'); + strbuf_add(sb, ((*tstr >> 3) & 7) + '0'); + strbuf_add(sb, (*tstr & 7) + '0'); + } + } + strbuf_add(sb, '"'); + tstr = strbuf_end(sb); + preproc_unget_token(pp, token_create(TOK_STR_LIT, tstr, pp -> lineno, pp -> column, pp -> fn)); + lw_free(tstr); + return 1; + } + else if (strcmp(mname, "__LINE__") == 0) + { + char nbuf[25]; + snprintf(nbuf, 25, "%d", pp -> lineno); + preproc_unget_token(pp, token_create(TOK_NUMBER, nbuf, pp -> lineno, pp -> column, pp -> fn)); + return 1; + } + else if (strcmp(mname, "__DATE__") == 0) + { + char dbuf[14]; + struct tm *tv; + time_t tm; + static char *months[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" }; + + tm = time(NULL); + tv = localtime(&tm); + snprintf(dbuf, 14, "\"%s %2d %04d\"", months[tv -> tm_mon], tv -> tm_mday, tv -> tm_year + 1900); + preproc_unget_token(pp, token_create(TOK_STR_LIT, dbuf, pp -> lineno, pp -> column, pp -> fn)); + return 1; + } + else if (strcmp(mname, "__TIME__") == 0) + { + char tbuf[11]; + struct tm *tv; + time_t tm; + + tm = time(NULL); + tv = localtime(&tm); + snprintf(tbuf, 11, "\"%02d:%02d:%02d\"", tv -> tm_hour, tv -> tm_min, tv -> tm_sec); + preproc_unget_token(pp, token_create(TOK_STR_LIT, tbuf, pp -> lineno, pp -> column, pp -> fn)); + return 1; + } + s = symtab_find(pp, mname); if (!s) return 0;