diag.h

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#ifndef DIAG_H_
#define DIAG_H_
 
#include <stdio.h>
 
#if defined(__clang__) || defined(__GNUC__)
#define DIAG_PRINTF_FORMAT(fmt_index, first_arg) \
    __attribute__((format(printf, fmt_index, first_arg)))
#else
#define DIAG_PRINTF_FORMAT(fmt_index, first_arg)
#endif
 
#ifdef __cplusplus
extern "C" {
#endif
 
enum diag_severity {
    DIAG_ERROR,
    DIAG_WARNING,
    DIAG_NOTE
};
 
struct diag_entry {
    enum diag_severity severity;
    int line;
    int col;
    char *message;
};
 
struct diag_engine {
    const char *filename;
    const char *source;        /* source content (not owned) */
    long source_len;
    struct diag_entry *entries;
    int count;
    int capacity;
    int error_count;
    int warning_count;
    int max_errors;            /* stop collecting after this many errors */
};
 
struct diag_engine *diag_engine_new(const char *filename, const char *source,
                                    long source_len);
 
void diag_engine_free(struct diag_engine *engine);
 
void diag_emit(struct diag_engine *engine, enum diag_severity severity,
               int line, int col, const char *fmt, ...)
    DIAG_PRINTF_FORMAT(5, 6);
 
void diag_print_all(struct diag_engine *engine, FILE *stream);
 
int diag_has_errors(struct diag_engine *engine);
 
int diag_error_count(struct diag_engine *engine);
 
#ifdef __cplusplus
}
#endif
 
#endif /* DIAG_H_ */