1 files changed, 106 insertions, 0 deletions
diff --git a/src/output.c b/src/output.c
new file mode 100644
index 0000000..84579f2
--- /dev/null
+++ b/src/output.c
@@ -0,0 +1,106 @@
+/* generated output implementation
+ *
+ * This file is part of nsgenbind.
+ * Licensed under the MIT License,
+ *                http://www.opensource.org/licenses/mit-license.php
+ * Copyright 2019 Vincent Sanders <vince@netsurf-browser.org>
+ */
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "utils.h"
+#include "output.h"
+
+struct opctx {
+    char *filename;
+    FILE *outf;
+    unsigned int lineno;
+};
+
+int output_open(const char *filename, struct opctx **opctx_out)
+{
+        struct opctx *opctx;
+
+        opctx = malloc(sizeof(struct opctx));
+        if (opctx == NULL) {
+                return -1;
+        }
+
+        opctx->filename = strdup(filename);
+        if (opctx->filename == NULL) {
+                free(opctx);
+                return -1;
+        }
+
+        /* open output file */
+        opctx->outf = genb_fopen_tmp(opctx->filename);
+        if (opctx->outf == NULL) {
+                free(opctx->filename);
+                free(opctx);
+                return -1;
+        }
+
+        opctx->lineno = 2;
+        *opctx_out = opctx;
+
+        return 0;
+}
+
+int output_close(struct opctx *opctx)
+{
+        int res;
+        res = genb_fclose_tmp(opctx->outf, opctx->filename);
+        free(opctx->filename);
+        free(opctx);
+        return res;
+}
+
+/**
+ * buffer to hold formatted output so newlines can be counted
+ */
+static char output_buffer[128*1024];
+
+int outputf(struct opctx *opctx, const char *fmt, ...)
+{
+        va_list ap;
+        int res;
+        int idx;
+
+        va_start(ap, fmt);
+        res = vsnprintf(output_buffer, sizeof(output_buffer), fmt, ap);
+        va_end(ap);
+
+        /* account for newlines in output */
+        for (idx = 0; idx < res; idx++) {
+                if (output_buffer[idx] == '\n') {
+                        opctx->lineno++;
+                }
+        }
+
+        fwrite(output_buffer, 1, res, opctx->outf);
+
+        return res;
+}
+
+int outputc(struct opctx *opctx, int c)
+{
+        if (c == '\n') {
+                opctx->lineno++;
+        }
+        fputc(c, opctx->outf);
+
+        return 0;
+}
+
+int output_line(struct opctx *opctx)
+{
+        int res;
+        res = fprintf(opctx->outf,
+                      "#line %d \"%s\"\n",
+                      opctx->lineno, opctx->filename);
+        opctx->lineno++;
+        return res;
+}