queue problems

src/spho/ctx.c

@@ -0,0 +1,126 @@
+
+#include <stdio.h>
+#include <string.h>
+
+#include "spho/ctx.h"
+
+static const char *spho_ctx_sys_strerror(struct spho_ctx *);
+static const char *spho_ctx_intern_strerror(struct spho_ctx *);
+
+struct spho_err {
+	int	num;
+	char	*msg;
+};
+
+struct spho_err spho_errmsgs[] = {
+	{ SPHO_ERR_SYSTEM, "spho system error" },
+	{ SPHO_ERR_INTERNAL, "spho internal error" },
+	{ -1, NULL }
+};
+
+struct spho_ctx *
+spho_ctx_create(void)
+{
+	struct spho_ctx *c;
+
+	if ((c = malloc(sizeof(struct spho_ctx))) == NULL)
+		return (NULL);
+
+	c->err = 0;
+	c->err_info = 0;
+
+	SLIST_INIT(&c->noms);
+	SLIST_INIT(&c->cnsts);
+
+	return (c);
+}
+
+void
+spho_ctx_destroy(struct spho_ctx *ctx)
+{
+	struct spho_nom_le *nom;
+	struct spho_cnst_le *cnst;
+
+	SPHO_PRECOND(ctx != NULL);
+
+	while (! SLIST_EMPTY(&c->noms)) {
+		nom = SLIST_FIRST(&c->noms);
+		SLIST_REMOVE_HEAD(&c->noms, next);
+		free(nom);
+	}
+
+	while (! SLIST_EMPTY(&c->cnsts)) {
+		cnst = SLIST_FIRST(&c->cnsts);
+		SLIST_REMOVE_HEAD(&c->cnsts, next);
+		free(cnst);
+	}
+}
+
+
+const char *
+spho_ctx_strerror(struct spho_ctx *ctx)
+{
+	char *msg;
+	int res;
+
+	SPHO_PRECOND(ctx != NULL);
+
+	msg = NULL;
+
+	if (SPHO_ERR_IS_SYSERR(ctx->err))
+		msg = spho_ctx_sys_strerror(ctx);
+	else
+		msg = spho_ctx_intern_strerror(ctx);
+
+	SPHO_POSTCOND(msg != NULL);
+
+	return (msg);
+}
+
+
+static const char *
+spho_ctx_sys_strerror(struct spho_ctx *ctx)
+{
+#ifdef SPHO_DEBUG
+	res = snprintf(ctx->errbuf, sizeof(ctx->errbuf),
+	    "%s:%d:spho_syserr:%s (%d)", ctx->filebuf, ctx->errline,
+	    strerror(ctx->err_info), ctx->err_info);
+	if (res >= sizeof(ctx->errbuf))
+		ctx->errbuf[sizeof(ctx->errbuf) - 1] = '\0';
+#else
+	res = snprintf(ctx->errbuf, sizeof(ctx->errbuf),
+	    "spho_syserr:%s (%d)", ctx->filebuf, ctx->errline,
+	    strerror(ctx->err_info), ctx->err_info);
+	if (res >= sizeof(ctx->errbuf))
+		ctx->errbuf[sizeof(ctx->errbuf) - 1] = '\0';
+#endif
+
+	return (ctx->errbuf);
+}
+
+static const char *
+spho_ctx_intern_strerror(struct spho_ctx *ctx)
+{
+	int i;
+	int res;
+
+	SPHO_PRECOND(ctx != NULL);
+
+	for (i = 0; spho_errmsgs[i].msg != NULL; i++) {
+		if (spho_errmsgs[i].err == ctx->err) {
+#ifdef SPHO_DEBUG
+			res = snprintf(ctx->errbuf, sizeof(ctx->errbuf),
+			    "%s:%d:spho_intern_err:%s", ctx->filebuf,
+			    ctx->errline, spho_errmsgs[i].msg);
+#else
+			res = snprintf(ctx->errbuf, sizeof(ctx->errbuf),
+			    "spho_intern_err:%s", ctx->errbuf);
+#endif
+		}
+	}
+
+	SPHO_POSTCOND(res != -1);
+
+	return (ctx->errbuf);
+}
+