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#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#ifdef _WIN32
#include <windows.h>
#else
#include <unistd.h>
#endif
#ifdef __ANDROID__
#include <android/log.h>
#endif
#ifdef __hexagon__
#include <qurt_printf.h>
#endif
#ifndef CLOG_LOG_TO_STDIO
#ifdef __ANDROID__
#define CLOG_LOG_TO_STDIO 0
#else
#define CLOG_LOG_TO_STDIO 1
#endif
#endif
#include <clog.h>
/* Messages up to this size are formatted entirely on-stack, and don't allocate heap memory */
#define CLOG_STACK_BUFFER_SIZE 1024
#define CLOG_FATAL_PREFIX "Fatal error: "
#define CLOG_FATAL_PREFIX_LENGTH 13
#define CLOG_FATAL_PREFIX_FORMAT "Fatal error in %s: "
#define CLOG_ERROR_PREFIX "Error: "
#define CLOG_ERROR_PREFIX_LENGTH 7
#define CLOG_ERROR_PREFIX_FORMAT "Error in %s: "
#define CLOG_WARNING_PREFIX "Warning: "
#define CLOG_WARNING_PREFIX_LENGTH 9
#define CLOG_WARNING_PREFIX_FORMAT "Warning in %s: "
#define CLOG_INFO_PREFIX "Note: "
#define CLOG_INFO_PREFIX_LENGTH 6
#define CLOG_INFO_PREFIX_FORMAT "Note (%s): "
#define CLOG_DEBUG_PREFIX "Debug: "
#define CLOG_DEBUG_PREFIX_LENGTH 7
#define CLOG_DEBUG_PREFIX_FORMAT "Debug (%s): "
#define CLOG_SUFFIX_LENGTH 1
void clog_vlog_fatal(const char* module, const char* format, va_list args) {
#if defined(__ANDROID__) && !CLOG_LOG_TO_STDIO
__android_log_vprint(ANDROID_LOG_FATAL, module, format, args);
#else
char stack_buffer[CLOG_STACK_BUFFER_SIZE];
char* heap_buffer = NULL;
char* out_buffer = &stack_buffer[0];
/* The first call to vsnprintf will clobber args, thus need a copy in case a second vsnprintf call is needed */
va_list args_copy;
va_copy(args_copy, args);
int prefix_chars = CLOG_FATAL_PREFIX_LENGTH;
if (module == NULL) {
memcpy(stack_buffer, CLOG_FATAL_PREFIX, CLOG_FATAL_PREFIX_LENGTH);
} else {
prefix_chars = snprintf(stack_buffer, CLOG_STACK_BUFFER_SIZE, CLOG_FATAL_PREFIX_FORMAT, module);
if (prefix_chars < 0) {
/* Format error in prefix (possible if prefix is modified): skip prefix and continue as if nothing happened. */
prefix_chars = 0;
}
}
int format_chars;
if (prefix_chars + CLOG_SUFFIX_LENGTH >= CLOG_STACK_BUFFER_SIZE) {
/*
* Prefix + suffix alone would overflow the on-stack buffer, thus need to use on-heap buffer.
* Do not even try to format the string into on-stack buffer.
*/
format_chars = vsnprintf(NULL, 0, format, args);
} else {
format_chars =
vsnprintf(
&stack_buffer[prefix_chars],
CLOG_STACK_BUFFER_SIZE - prefix_chars - CLOG_SUFFIX_LENGTH,
format,
args);
}
if (format_chars < 0) {
/* Format error in the message: silently ignore this particular message. */
goto cleanup;
}
if (prefix_chars + format_chars + CLOG_SUFFIX_LENGTH > CLOG_STACK_BUFFER_SIZE) {
/* Allocate a buffer on heap, and vsnprintf to this buffer */
heap_buffer = malloc(prefix_chars + format_chars + CLOG_SUFFIX_LENGTH);
if (heap_buffer == NULL) {
goto cleanup;
}
if (prefix_chars > CLOG_STACK_BUFFER_SIZE) {
/* Prefix didn't fit into on-stack buffer, re-format it again to on-heap buffer */
snprintf(heap_buffer, prefix_chars + 1 /* for '\0'-terminator */, CLOG_FATAL_PREFIX_FORMAT, module);
} else {
/* Copy pre-formatted prefix from on-stack buffer to on-heap buffer */
memcpy(heap_buffer, stack_buffer, prefix_chars);
}
vsnprintf(heap_buffer + prefix_chars, format_chars + CLOG_SUFFIX_LENGTH, format, args_copy);
out_buffer = heap_buffer;
}
out_buffer[prefix_chars + format_chars] = '\n';
#if defined(_WIN32)
DWORD bytes_written;
WriteFile(
GetStdHandle(STD_ERROR_HANDLE),
out_buffer, prefix_chars + format_chars + CLOG_SUFFIX_LENGTH,
&bytes_written, NULL);
#elif defined(__hexagon__)
qurt_printf("%s", out_buffer);
#else
write(STDERR_FILENO, out_buffer, prefix_chars + format_chars + CLOG_SUFFIX_LENGTH);
#endif
cleanup:
free(heap_buffer);
va_end(args_copy);
#endif
}
void clog_vlog_error(const char* module, const char* format, va_list args) {
#if defined(__ANDROID__) && !CLOG_LOG_TO_STDIO
__android_log_vprint(ANDROID_LOG_ERROR, module, format, args);
#else
char stack_buffer[CLOG_STACK_BUFFER_SIZE];
char* heap_buffer = NULL;
char* out_buffer = &stack_buffer[0];
/* The first call to vsnprintf will clobber args, thus need a copy in case a second vsnprintf call is needed */
va_list args_copy;
va_copy(args_copy, args);
int prefix_chars = CLOG_ERROR_PREFIX_LENGTH;
if (module == NULL) {
memcpy(stack_buffer, CLOG_ERROR_PREFIX, CLOG_ERROR_PREFIX_LENGTH);
} else {
prefix_chars = snprintf(stack_buffer, CLOG_STACK_BUFFER_SIZE, CLOG_ERROR_PREFIX_FORMAT, module);
if (prefix_chars < 0) {
/* Format error in prefix (possible if prefix is modified): skip prefix and continue as if nothing happened. */
prefix_chars = 0;
}
}
int format_chars;
if (prefix_chars + CLOG_SUFFIX_LENGTH >= CLOG_STACK_BUFFER_SIZE) {
/*
* Prefix + suffix alone would overflow the on-stack buffer, thus need to use on-heap buffer.
* Do not even try to format the string into on-stack buffer.
*/
format_chars = vsnprintf(NULL, 0, format, args);
} else {
format_chars =
vsnprintf(
&stack_buffer[prefix_chars],
CLOG_STACK_BUFFER_SIZE - prefix_chars - CLOG_SUFFIX_LENGTH,
format,
args);
}
if (format_chars < 0) {
/* Format error in the message: silently ignore this particular message. */
goto cleanup;
}
if (prefix_chars + format_chars + CLOG_SUFFIX_LENGTH > CLOG_STACK_BUFFER_SIZE) {
/* Allocate a buffer on heap, and vsnprintf to this buffer */
heap_buffer = malloc(prefix_chars + format_chars + CLOG_SUFFIX_LENGTH);
if (heap_buffer == NULL) {
goto cleanup;
}
if (prefix_chars > CLOG_STACK_BUFFER_SIZE) {
/* Prefix didn't fit into on-stack buffer, re-format it again to on-heap buffer */
snprintf(heap_buffer, prefix_chars + 1 /* for '\0'-terminator */, CLOG_ERROR_PREFIX_FORMAT, module);
} else {
/* Copy pre-formatted prefix from on-stack buffer to on-heap buffer */
memcpy(heap_buffer, stack_buffer, prefix_chars);
}
vsnprintf(heap_buffer + prefix_chars, format_chars + CLOG_SUFFIX_LENGTH, format, args_copy);
out_buffer = heap_buffer;
}
out_buffer[prefix_chars + format_chars] = '\n';
#if defined(_WIN32)
DWORD bytes_written;
WriteFile(
GetStdHandle(STD_ERROR_HANDLE),
out_buffer, prefix_chars + format_chars + CLOG_SUFFIX_LENGTH,
&bytes_written, NULL);
#elif defined(__hexagon__)
qurt_printf("%s", out_buffer);
#else
write(STDERR_FILENO, out_buffer, prefix_chars + format_chars + CLOG_SUFFIX_LENGTH);
#endif
cleanup:
free(heap_buffer);
va_end(args_copy);
#endif
}
void clog_vlog_warning(const char* module, const char* format, va_list args) {
#if defined(__ANDROID__) && !CLOG_LOG_TO_STDIO
__android_log_vprint(ANDROID_LOG_WARN, module, format, args);
#else
char stack_buffer[CLOG_STACK_BUFFER_SIZE];
char* heap_buffer = NULL;
char* out_buffer = &stack_buffer[0];
/* The first call to vsnprintf will clobber args, thus need a copy in case a second vsnprintf call is needed */
va_list args_copy;
va_copy(args_copy, args);
int prefix_chars = CLOG_WARNING_PREFIX_LENGTH;
if (module == NULL) {
memcpy(stack_buffer, CLOG_WARNING_PREFIX, CLOG_WARNING_PREFIX_LENGTH);
} else {
prefix_chars = snprintf(stack_buffer, CLOG_STACK_BUFFER_SIZE, CLOG_WARNING_PREFIX_FORMAT, module);
if (prefix_chars < 0) {
/* Format error in prefix (possible if prefix is modified): skip prefix and continue as if nothing happened. */
prefix_chars = 0;
}
}
int format_chars;
if (prefix_chars + CLOG_SUFFIX_LENGTH >= CLOG_STACK_BUFFER_SIZE) {
/*
* Prefix + suffix alone would overflow the on-stack buffer, thus need to use on-heap buffer.
* Do not even try to format the string into on-stack buffer.
*/
format_chars = vsnprintf(NULL, 0, format, args);
} else {
format_chars =
vsnprintf(
&stack_buffer[prefix_chars],
CLOG_STACK_BUFFER_SIZE - prefix_chars - CLOG_SUFFIX_LENGTH,
format,
args);
}
if (format_chars < 0) {
/* Format error in the message: silently ignore this particular message. */
goto cleanup;
}
if (prefix_chars + format_chars + CLOG_SUFFIX_LENGTH > CLOG_STACK_BUFFER_SIZE) {
/* Allocate a buffer on heap, and vsnprintf to this buffer */
heap_buffer = malloc(prefix_chars + format_chars + CLOG_SUFFIX_LENGTH);
if (heap_buffer == NULL) {
goto cleanup;
}
if (prefix_chars > CLOG_STACK_BUFFER_SIZE) {
/* Prefix didn't fit into on-stack buffer, re-format it again to on-heap buffer */
snprintf(heap_buffer, prefix_chars + 1 /* for '\0'-terminator */, CLOG_WARNING_PREFIX_FORMAT, module);
} else {
/* Copy pre-formatted prefix from on-stack buffer to on-heap buffer */
memcpy(heap_buffer, stack_buffer, prefix_chars);
}
vsnprintf(heap_buffer + prefix_chars, format_chars + CLOG_SUFFIX_LENGTH, format, args_copy);
out_buffer = heap_buffer;
}
out_buffer[prefix_chars + format_chars] = '\n';
#if defined(_WIN32)
DWORD bytes_written;
WriteFile(
GetStdHandle(STD_ERROR_HANDLE),
out_buffer, prefix_chars + format_chars + CLOG_SUFFIX_LENGTH,
&bytes_written, NULL);
#elif defined(__hexagon__)
qurt_printf("%s", out_buffer);
#else
write(STDERR_FILENO, out_buffer, prefix_chars + format_chars + CLOG_SUFFIX_LENGTH);
#endif
cleanup:
free(heap_buffer);
va_end(args_copy);
#endif
}
void clog_vlog_info(const char* module, const char* format, va_list args) {
#if defined(__ANDROID__) && !CLOG_LOG_TO_STDIO
__android_log_vprint(ANDROID_LOG_INFO, module, format, args);
#else
char stack_buffer[CLOG_STACK_BUFFER_SIZE];
char* heap_buffer = NULL;
char* out_buffer = &stack_buffer[0];
/* The first call to vsnprintf will clobber args, thus need a copy in case a second vsnprintf call is needed */
va_list args_copy;
va_copy(args_copy, args);
int prefix_chars = CLOG_INFO_PREFIX_LENGTH;
if (module == NULL) {
memcpy(stack_buffer, CLOG_INFO_PREFIX, CLOG_INFO_PREFIX_LENGTH);
} else {
prefix_chars = snprintf(stack_buffer, CLOG_STACK_BUFFER_SIZE, CLOG_INFO_PREFIX_FORMAT, module);
if (prefix_chars < 0) {
/* Format error in prefix (possible if prefix is modified): skip prefix and continue as if nothing happened. */
prefix_chars = 0;
}
}
int format_chars;
if (prefix_chars + CLOG_SUFFIX_LENGTH >= CLOG_STACK_BUFFER_SIZE) {
/*
* Prefix + suffix alone would overflow the on-stack buffer, thus need to use on-heap buffer.
* Do not even try to format the string into on-stack buffer.
*/
format_chars = vsnprintf(NULL, 0, format, args);
} else {
format_chars =
vsnprintf(
&stack_buffer[prefix_chars],
CLOG_STACK_BUFFER_SIZE - prefix_chars - CLOG_SUFFIX_LENGTH,
format,
args);
}
if (format_chars < 0) {
/* Format error in the message: silently ignore this particular message. */
goto cleanup;
}
if (prefix_chars + format_chars + CLOG_SUFFIX_LENGTH > CLOG_STACK_BUFFER_SIZE) {
/* Allocate a buffer on heap, and vsnprintf to this buffer */
heap_buffer = malloc(prefix_chars + format_chars + CLOG_SUFFIX_LENGTH);
if (heap_buffer == NULL) {
goto cleanup;
}
if (prefix_chars > CLOG_STACK_BUFFER_SIZE) {
/* Prefix didn't fit into on-stack buffer, re-format it again to on-heap buffer */
snprintf(heap_buffer, prefix_chars + 1 /* for '\0'-terminator */, CLOG_INFO_PREFIX_FORMAT, module);
} else {
/* Copy pre-formatted prefix from on-stack buffer to on-heap buffer */
memcpy(heap_buffer, stack_buffer, prefix_chars);
}
vsnprintf(heap_buffer + prefix_chars, format_chars + CLOG_SUFFIX_LENGTH, format, args_copy);
out_buffer = heap_buffer;
}
out_buffer[prefix_chars + format_chars] = '\n';
#if defined(_WIN32)
DWORD bytes_written;
WriteFile(
GetStdHandle(STD_OUTPUT_HANDLE),
out_buffer, prefix_chars + format_chars + CLOG_SUFFIX_LENGTH,
&bytes_written, NULL);
#elif defined(__hexagon__)
qurt_printf("%s", out_buffer);
#else
write(STDOUT_FILENO, out_buffer, prefix_chars + format_chars + CLOG_SUFFIX_LENGTH);
#endif
cleanup:
free(heap_buffer);
va_end(args_copy);
#endif
}
void clog_vlog_debug(const char* module, const char* format, va_list args) {
#if defined(__ANDROID__) && !CLOG_LOG_TO_STDIO
__android_log_vprint(ANDROID_LOG_DEBUG, module, format, args);
#else
char stack_buffer[CLOG_STACK_BUFFER_SIZE];
char* heap_buffer = NULL;
char* out_buffer = &stack_buffer[0];
/* The first call to vsnprintf will clobber args, thus need a copy in case a second vsnprintf call is needed */
va_list args_copy;
va_copy(args_copy, args);
int prefix_chars = CLOG_DEBUG_PREFIX_LENGTH;
if (module == NULL) {
memcpy(stack_buffer, CLOG_DEBUG_PREFIX, CLOG_DEBUG_PREFIX_LENGTH);
} else {
prefix_chars = snprintf(stack_buffer, CLOG_STACK_BUFFER_SIZE, CLOG_DEBUG_PREFIX_FORMAT, module);
if (prefix_chars < 0) {
/* Format error in prefix (possible if prefix is modified): skip prefix and continue as if nothing happened. */
prefix_chars = 0;
}
}
int format_chars;
if (prefix_chars + CLOG_SUFFIX_LENGTH >= CLOG_STACK_BUFFER_SIZE) {
/*
* Prefix + suffix alone would overflow the on-stack buffer, thus need to use on-heap buffer.
* Do not even try to format the string into on-stack buffer.
*/
format_chars = vsnprintf(NULL, 0, format, args);
} else {
format_chars =
vsnprintf(
&stack_buffer[prefix_chars],
CLOG_STACK_BUFFER_SIZE - prefix_chars - CLOG_SUFFIX_LENGTH,
format,
args);
}
if (format_chars < 0) {
/* Format error in the message: silently ignore this particular message. */
goto cleanup;
}
if (prefix_chars + format_chars + CLOG_SUFFIX_LENGTH > CLOG_STACK_BUFFER_SIZE) {
/* Allocate a buffer on heap, and vsnprintf to this buffer */
heap_buffer = malloc(prefix_chars + format_chars + CLOG_SUFFIX_LENGTH);
if (heap_buffer == NULL) {
goto cleanup;
}
if (prefix_chars > CLOG_STACK_BUFFER_SIZE) {
/* Prefix didn't fit into on-stack buffer, re-format it again to on-heap buffer */
snprintf(heap_buffer, prefix_chars + 1 /* for '\0'-terminator */, CLOG_DEBUG_PREFIX_FORMAT, module);
} else {
/* Copy pre-formatted prefix from on-stack buffer to on-heap buffer */
memcpy(heap_buffer, stack_buffer, prefix_chars);
}
vsnprintf(heap_buffer + prefix_chars, format_chars + CLOG_SUFFIX_LENGTH, format, args_copy);
out_buffer = heap_buffer;
}
out_buffer[prefix_chars + format_chars] = '\n';
#if defined(_WIN32)
DWORD bytes_written;
WriteFile(
GetStdHandle(STD_OUTPUT_HANDLE),
out_buffer, prefix_chars + format_chars + CLOG_SUFFIX_LENGTH,
&bytes_written, NULL);
#elif defined(__hexagon__)
qurt_printf("%s", out_buffer);
#else
write(STDOUT_FILENO, out_buffer, prefix_chars + format_chars + CLOG_SUFFIX_LENGTH);
#endif
cleanup:
free(heap_buffer);
va_end(args_copy);
#endif
}
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