context.h

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/* Simple Plugin API */
/* SPDX-FileCopyrightText: Copyright © 2023 Wim Taymans */
/* SPDX-License-Identifier: MIT */
 
#ifndef SPA_DEBUG_CONTEXT_H
#define SPA_DEBUG_CONTEXT_H
 
#include <stdio.h>
#include <stdarg.h>
#include <ctype.h>
 
#include <spa/utils/defs.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#ifndef spa_debugn
#define spa_debugn(_fmt,...)    printf((_fmt), ## __VA_ARGS__)
#endif
#ifndef spa_debug
#define spa_debug(_fmt,...)     spa_debugn(_fmt"\n", ## __VA_ARGS__)
#endif
 
 
#ifndef SPA_API_DEBUG_CONTEXT
 #ifdef SPA_API_IMPL
  #define SPA_API_DEBUG_CONTEXT SPA_API_IMPL
 #else
  #define SPA_API_DEBUG_CONTEXT static inline
 #endif
#endif
 
struct spa_debug_context {
        void (*log) (struct spa_debug_context *ctx, const char *fmt, ...) SPA_PRINTF_FUNC(2, 3);
};
 
#define spa_debugc(_c,_fmt,...) (_c)?((_c)->log((_c),_fmt, ## __VA_ARGS__)):(void)spa_debug(_fmt, ## __VA_ARGS__)
 
SPA_API_DEBUG_CONTEXT void spa_debugc_error_location(struct spa_debug_context *c,
                struct spa_error_location *loc)
{
        int i, skip = loc->col > 80 ? loc->col - 40 : 0, lc = loc->col-skip-1;
        char buf[80];
 
        for (i = 0; (size_t)i < sizeof(buf)-1 && (size_t)(i + skip) < loc->len; i++) {
                char ch = loc->location[i + skip];
                if (ch == '\n' || ch == '\0')
                        break;
                buf[i] = isspace(ch) ? ' ' : ch;
        }
        buf[i] = '\0';
        spa_debugc(c, "line:%6d | %s%s", loc->line, skip ? "..." : "", buf);
        for (i = 0; buf[i]; i++)
                buf[i] = i < lc ? '-' : i == lc ? '^' : ' ';
        spa_debugc(c, "column:%4d |-%s%s", loc->col, skip ? "---" : "", buf);
}
 
#ifdef __cplusplus
}  /* extern "C" */
#endif
 
#endif /* SPA_DEBUG_CONTEXT_H */