diff options
Diffstat (limited to 'err.c')
-rw-r--r-- | err.c | 129 |
1 files changed, 129 insertions, 0 deletions
@@ -0,0 +1,129 @@ +#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 + +static inline const char *ordinals(size_t x) { + switch (x % 10) { + case 1: return "st"; + case 2: return "nd"; + case 3: return "rd"; + default: return "th"; + } +} + +/* 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_(Location where) { + err_fprint(TEXT_ERROR("error:") " at line %lu of %s:\n", (unsigned long)where.line, where.filename); +} + +static void info_print_header_(Location where) { + err_fprint(TEXT_INFO("info:") " at line %lu of %s:\n", (unsigned long)where.line, where.filename); +} + +static void warn_print_header_(Location where) { + err_fprint(TEXT_WARN("warning:") " at line %lu of %s:\n", (unsigned long)where.line, where.filename); +} + +static void err_print_footer_(const char *context) { + const char *end = strchr(context, '\n'); + int has_newline = end != NULL; + if (!has_newline) + end = strchr(context, '\0'); + assert(end); + err_fprint("\n\there: --> "); + 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); + err_vfprint(fmt, args); + err_print_footer_(where.code); +} + +static void err_print_(int line, const char *file, Location where, const char *fmt, ...) { + va_list args; + if (file) + err_fprint("Generated by line %d of %s:\n", line, file); + va_start(args, fmt); + err_vprint(where, fmt, args); + va_end(args); +} + +#define err_print(...) err_print_(__LINE__, __FILE__, __VA_ARGS__) + +static void info_print(Location where, const char *fmt, ...) { + va_list args; + va_start(args, fmt); + info_print_header_(where); + 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); + 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; +} + |