diff options
Diffstat (limited to 'util/err.c')
-rw-r--r-- | util/err.c | 60 |
1 files changed, 56 insertions, 4 deletions
@@ -1,13 +1,65 @@ +#define USE_COLORED_TEXT 1 + +#if USE_COLORED_TEXT +#define TEXT_ERROR(x) "\x1b[91m" x "\x1b[0m" +#define TEXT_IMPORTANT(x) "\x1b[1m" x "\x1b[0m" +#else +#define TEXT_ERROR(x) x +#define TEXT_IMPORTANT(x) x +#endif + typedef uint32_t LineNo; -static void err_print(LineNo line, LineNo col, const char *fmt, ...) { - /* TODO: Color */ +/* 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; - fprintf(stderr, TEXT_ERROR("error:") " at line %lu col %lu:\n", (unsigned long)line, (unsigned long)col); va_start(args, fmt); vfprintf(stderr, fmt, args); va_end(args); - fprintf(stderr, "\n"); +} + +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 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_print(LineNo line, const char *context, const char *fmt, ...) { + err_print_header_(line); + va_list args; + va_start(args, fmt); + err_vfprint(fmt, args); + va_end(args); + err_print_footer_(context); +} + +static void err_vprint(LineNo line, const char *context, const char *fmt, va_list args) { + err_print_header_(line); + err_vfprint(fmt, args); + err_print_footer_(context); } static void *err_malloc(size_t size) { |