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trainerproc: Fix showing incorrect error context (#5769)

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Martin Griffin 2024-12-04 18:22:35 +00:00 committed by GitHub
parent 93e733820c
commit c714caa27a
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GPG key ID: B5690EEEBB952194
1 changed files with 53 additions and 45 deletions
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98
tools/trainerproc/main.c
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@ -251,51 +251,6 @@ static bool set_parse_error(struct Parser *p, struct SourceLocation location, co
return false; return false;
} }
static bool show_parse_error(struct Parser *p)
{
// Print error message.
int n = fprintf(stderr, "%s:%d: ", p->source->path, p->error_location.line);
fprintf(stderr, "error: %s\n", p->error);
// Seek to the line.
int line, begin, end;
for (line = 1, begin = 0; begin < p->source->buffer_n; begin++)
{
if (p->error_location.line == line)
break;
if (p->source->buffer[begin] == '\n')
line++;
}
for (end = begin; end < p->source->buffer_n; end++)
{
if (p->source->buffer[end] == '\n')
break;
}
// Print the source line.
fprintf(stderr, "%s:%d: %.*s\n", p->source->path, p->error_location.line, end - begin, &p->source->buffer[begin]);
// Print caret pointing at the column.
fprintf(stderr, "%*s", n, "");
for (int column = 1; column < p->error_location.column && begin + column < end; column++)
{
unsigned char c = p->source->buffer[begin + column];
fputc(c == '\t' ? c : ' ', stderr);
}
fprintf(stderr, "^\n");
p->error = NULL;
p->fatal_error = true;
return false;
}
static bool set_show_parse_error(struct Parser *p, struct SourceLocation location, const char *error)
{
set_parse_error(p, location, error);
return show_parse_error(p);
}
__attribute__((warn_unused_result)) __attribute__((warn_unused_result))
static bool peek_char(struct Parser *p, unsigned char *c) static bool peek_char(struct Parser *p, unsigned char *c)
{ {
@ -618,6 +573,59 @@ static bool match_move_identifier(struct Parser *p, struct Token *t)
return true; return true;
} }
static bool show_parse_error(struct Parser *p)
{
// Print error message.
int n = fprintf(stderr, "%s:%d: ", p->source->path, p->error_location.line);
fprintf(stderr, "error: %s\n", p->error);
struct Parser p_ = {
.source = p->source,
.location = { .line = 1, .column = 1 },
.offset = 0,
};
for (;;) {
if (p->error_location.line == p_.location.line)
break;
if (!match_empty_line(&p_))
skip_line(&p_);
if (match_eof(&p_))
assert(false);
}
int begin = p_.offset;
int end;
for (end = begin; end < p->source->buffer_n; end++)
{
if (p->source->buffer[end] == '\n')
break;
}
// Print the source line.
fprintf(stderr, "%s:%d: %.*s\n", p->source->path, p->error_location.line, end - begin, &p->source->buffer[begin]);
// Print caret pointing at the column.
fprintf(stderr, "%*s", n, "");
for (int column = 1; column < p->error_location.column && begin + column < end; column++)
{
unsigned char c = p->source->buffer[begin + column];
fputc(c == '\t' ? c : ' ', stderr);
}
fprintf(stderr, "^\n");
p->error = NULL;
p->fatal_error = true;
return false;
}
static bool set_show_parse_error(struct Parser *p, struct SourceLocation location, const char *error)
{
set_parse_error(p, location, error);
return show_parse_error(p);
}
__attribute__((warn_unused_result)) __attribute__((warn_unused_result))
static bool parse_section(struct Parser *p, struct Token *section) static bool parse_section(struct Parser *p, struct Token *section)
{ {