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#define USE_COLORED_TEXT 1
#if USE_COLORED_TEXT
#define TEXT_ERROR(x) "\x1b[91m" x "\x1b[0m"
#define TEXT_INFO(x) "\x1b[94m" x "\x1b[0m"
#define TEXT_WARN(x) "\x1b[93m" x "\x1b[0m"
#define TEXT_IMPORTANT(x) "\x1b[1m" x "\x1b[0m"
#else
#define TEXT_ERROR(x) x
#define TEXT_INFO(x) x
#define TEXT_WARN(x) x
#define TEXT_IMPORTANT(x) x
#endif
typedef uint32_t LineNo;
typedef struct {
LineNo line;
char *code;
} Location;
/* file name of file being processed */
static const char *err_filename;
/* Write directly to the error file */
static void err_fwrite(const void *data, size_t size, size_t n) {
fwrite(data, size, n, stderr);
}
static void err_fprint(const char *fmt, ...) {
va_list args;
va_start(args, fmt);
vfprintf(stderr, fmt, args);
va_end(args);
}
static void err_vfprint(const char *fmt, va_list args) {
vfprintf(stderr, fmt, args);
}
static void err_print_header_(LineNo line) {
err_fprint(TEXT_ERROR("error:") " at line %lu of %s:\n", (unsigned long)line, err_filename);
}
static void info_print_header_(LineNo line) {
err_fprint(TEXT_INFO("info:") " at line %lu of %s:\n", (unsigned long)line, err_filename);
}
static void warn_print_header_(LineNo line) {
err_fprint(TEXT_WARN("warning:") " at line %lu of %s:\n", (unsigned long)line, err_filename);
}
static void err_print_footer_(const char *context) {
err_fprint("\n\there --> ");
const char *end = strchr(context, '\n');
int has_newline = end != NULL;
if (!has_newline)
end = strchr(context, '\0');
assert(end);
err_fwrite(context, 1, (size_t)(end - context));
if (!has_newline)
err_fprint("<end of file>");
err_fprint("\n");
}
/* Write nicely-formatted errors to the error file */
static void err_vprint(Location where, const char *fmt, va_list args) {
err_print_header_(where.line);
err_vfprint(fmt, args);
err_print_footer_(where.code);
}
static void err_print(Location where, const char *fmt, ...) {
va_list args;
va_start(args, fmt);
err_vprint(where, fmt, args);
va_end(args);
}
static void info_print(Location where, const char *fmt, ...) {
va_list args;
va_start(args, fmt);
info_print_header_(where.line);
err_vfprint(fmt, args);
err_print_footer_(where.code);
va_end(args);
}
static void warn_print(Location where, const char *fmt, ...) {
va_list args;
va_start(args, fmt);
warn_print_header_(where.line);
err_vfprint(fmt, args);
err_print_footer_(where.code);
va_end(args);
}
static void *err_malloc(size_t size) {
void *ret = malloc(size);
if (!ret) {
fprintf(stderr, "Error: Out of memory.\n");
abort();
}
return ret;
}
static void *err_calloc(size_t n, size_t size) {
void *ret = calloc(n, size);
if (!ret) {
fprintf(stderr, "Error: Out of memory.\n");
abort();
}
return ret;
}
static void *err_realloc(void *data, size_t new_size) {
void *ret = realloc(data, new_size);
if (!ret) {
fprintf(stderr, "Error: Out of memory.\n");
abort();
}
return ret;
}
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