luke
/
iverilog
mirror of https://github.com/steveicarus/iverilog.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

ivlpp: Add __LINE__ magic macro

This commit is contained in:
Joe Auricchio 2010-11-27 02:30:31 -05:00 committed by Stephen Williams
parent 63fd0813bd
commit 1f1b7d36bc
1 changed files with 50 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
ivlpp/lexor.lex
View File

@ -77,6 +77,7 @@ struct include_stack_t
char* comment;
};
static unsigned get_line(struct include_stack_t* isp);
static void emit_pathline(struct include_stack_t* isp);
/*
@ -662,7 +663,23 @@ struct define_t
};
static struct define_t* def_table = 0;
static struct define_t* magic_table = 0;
/*
* magic macros
*/
static struct define_t def_LINE =
{
.name = "__LINE__",
.value = "__LINE__",
.keyword = 0,
.argc = 1,
.magic = 1,
.left = 0,
.right = 0,
.up = 0
};
static struct define_t* magic_table = &def_LINE;
/*
* helper function for def_lookup
@ -1490,7 +1507,23 @@ static const char* do_magic(const char*name)
if(!strcmp(name, "__LINE__"))
{
// to be implemented
// istack->lineno is unsigned. the largest it could be is 64 bits.
// 2^64 is between 10^19 and 10^20. So the decimal representation of
// lineno can't possibly be longer than 23 bytes. I'm generous but
// bytes are cheap and this is nobody's critical path.
desired_cnt = 24;
if(magic_cnt < desired_cnt)
{
magic_text = realloc(magic_text, desired_cnt);
assert(magic_text);
magic_cnt = desired_cnt;
}
int actual_len = snprintf(magic_text, desired_cnt,
"%u", get_line(istack));
assert(actual_len < desired_cnt);
return magic_text;
}
// if we get here, then either there was no magic macro with the requested
@ -1617,6 +1650,21 @@ code_that_switches_buffers:
yy_switch_to_buffer(yy_create_buffer(istack->file, YY_BUF_SIZE));
}
/*
* walk the include stack until we find an entry with a valid pathname,
* and return the line from that entry for use in an error message.
* This is the real file and line in which the outermost macro was used.
*/
static unsigned get_line(struct include_stack_t* isp)
{
while(isp && (isp->path == NULL))
isp = isp->next;
assert(isp);
return isp->lineno+1;
}
/* walk the include stack until we find an entry with a valid pathname,
* and print the file and line from that entry for use in an error message.
* The istack entries created by do_expand() for macro expansions do not