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50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#ifdef __clang__
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// Clang has a bug on zero-initialization of C structs.
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#pragma clang diagnostic ignored "-Wmissing-field-initializers"
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#endif
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#include "dive.h"
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#include "membuffer.h"
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#define VA_BUF(b, fmt) do { va_list args; va_start(args, fmt); put_vformat(b, fmt, args); va_end(args); } while (0)
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static struct membuffer error_string_buffer = { 0 };
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static void (*error_cb)(void) = NULL;
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/*
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* Note that the act of "getting" the error string
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* buffer doesn't de-allocate the buffer, but it does
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* set the buffer length to zero, so that any future
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* error reports will overwrite the string rather than
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* append to it.
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*/
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const char *get_error_string(void)
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{
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const char *str;
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if (!error_string_buffer.len)
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return "";
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str = mb_cstring(&error_string_buffer);
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error_string_buffer.len = 0;
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return str;
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}
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int report_error(const char *fmt, ...)
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{
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struct membuffer *buf = &error_string_buffer;
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/* Previous unprinted errors? Add a newline in between */
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if (buf->len)
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put_bytes(buf, "\n", 1);
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VA_BUF(buf, fmt);
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mb_cstring(buf);
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/* if an error callback is registered, call it */
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if (error_cb)
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error_cb();
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return -1;
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}
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void set_error_cb(void(*cb)(void)) {
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error_cb = cb;
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}
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