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Keep track of line number and filename from preprocessor output for error messages

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This commit is contained in:
Josh Holtrop 2018-04-18 20:10:23 -04:00
parent 74031d18d7
commit b2072de717
1 changed files with 27 additions and 0 deletions
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27
src/parser/parser.l
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@ -6,10 +6,14 @@
#include "parser.h"
#include "parser.tab.h"
#include "String.h"
#include <stdlib.h>
#define YY_USER_ACTION yylloc->first_column += yyleng;
static String * build_string = NULL;
static size_t current_line = 1u;
static String * current_file = NULL;
void handle_loc(const char * input);
%}
@ -164,13 +168,36 @@ L?\" {
[a-zA-Z_][a-zA-Z_0-9]* return TOK_IDENTIFIER;
^[ ]*#[ ]+[0-9]+[ ]+\".+\".*$ {
handle_loc(yytext);
}
\n {
yylloc->first_line++;
yylloc->first_column = 0;
yylloc->last_line++;
yylloc->last_column = 0;
current_line++;
}
[ \t\v] /* ignore whitespace */
%%
void handle_loc(const char * input)
{
while ((*input < '0') || (*input > '9'))
{
input++;
}
current_line = (size_t)atol(input) - 1u;
while (*input != '"')
{
input++;
}
input++;
const char * fname_start = input;
while (*input != '"')
{
input++;
}
size_t fname_len = (input - fname_start);
current_file = String_new_size(fname_start, fname_len);
}