backup

[lcr.git] / macro.h

diff --git a/macro.h b/macro.h
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+/*****************************************************************************\
+**                                                                           **
+** LCR                                                                       **
+**                                                                           **
+**---------------------------------------------------------------------------**
+** Copyright: Andreas Eversberg                                              **
+**                                                                           **
+** Macros to do safe string operations to avoid buffer overflows             **
+** Macros for memory allocation, feeing and error handling                   **
+**                                                                           **
+\*****************************************************************************/ 
+
+
+/* save strcpy/strncpy */
+
+#define SCPY(dst, src) scpy(dst, src, sizeof(dst))
+extern __inline__ void scpy(char *dst, char *src, unsigned int siz)
+{
+       strncpy(dst, src, siz);
+       dst[siz-1] = '\0';
+}
+
+/* save strcat/strncat */
+
+#define SCAT(dst, src) scat(dst, src, sizeof(dst))
+extern __inline__ void scat(char *dst, char *src, unsigned int siz)
+{
+       strncat(dst, src, siz);
+       dst[siz-1] = '\0';
+}
+
+/* save concat of a byte */
+
+#define SCCAT(dst, src) sccat(dst, src, sizeof(dst))
+extern __inline__ void sccat(char *dst, char chr, unsigned int siz)
+{
+       if (strlen(dst) < siz-1)
+       {
+               dst[strlen(dst)+1] = '\0';
+               dst[strlen(dst)] = chr;
+       }
+}
+
+/* save sprintf/snprintf */
+
+#define SPRINT(dst, fmt, arg...) sprint(dst, sizeof(dst), fmt, ## arg)
+extern __inline__ void sprint(char *dst, unsigned int siz, char *fmt, ...)
+{
+       va_list args;
+
+       va_start(args, fmt);
+       vsnprintf(dst, siz, fmt, args);
+       dst[siz-1] = '\0';
+       va_end(args);
+}
+
+/* unsave */
+#define UCPY strcpy
+#define UNCPY strncpy
+#define UCAT strcat
+#define UNCAT strncat
+#define UPRINT sprintf
+#define UNPRINT snprintf
+#define VUNPRINT vsnprintf
+
+/* fatal error with error message and exit */
+#define FATAL(fmt, arg...) fatal(__FUNCTION__, __LINE__, fmt, ##arg)
+extern __inline__ void fatal(const char *function, int line, char *fmt, ...)
+{
+       va_list args;
+       char buffer[256];
+
+       va_start(args, fmt);
+       vsnprintf(buffer, sizeof(buffer), fmt, args);
+       va_end(args);
+       buffer[sizeof(buffer)-1] = '\0';
+       fprintf(stderr, "FATAL ERROR in function %s, line %d: %s", function, line, buffer);
+       fprintf(stderr, "This error is not recoverable, must exit here.\n");
+#ifdef DEBUG_FUNC
+       debug(function, line, "FATAL ERROR", buffer);
+       debug(function, line, "FATAL ERROR", "This error is not recoverable, must exit here.\n");
+#endif
+       exit(EXIT_FAILURE);
+}
+
+/* memory allocation with setting to zero */
+#define MALLOC(size) _malloc(size, __FUNCTION__, __LINE__)
+extern __inline__ void *_malloc(unsigned long size, const char *function, int line)
+{
+       void *addr;
+       addr = malloc(size);
+       if (!addr)
+               fatal(function, line, "No memory for %d bytes.\n", size);
+       memset(addr, 0, size);
+       return(addr);
+}
+
+/* memory freeing with clearing memory to prevent using freed memory */
+#define FREE(addr, size) _free(addr, size)
+extern __inline void _free(void *addr, int size)
+{
+       if (size)
+               memset(addr, 0, size);
+       free(addr);
+}
+
+