105 lines
2.4 KiB
C
105 lines
2.4 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "fsctl/fugue/logger.h"
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//---
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// Public
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//---
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/* fugue_logger_init() : initialize internal logger buffer at fixed size */
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int fugue_logger_init(fugue_logger_t *logger, size_t buffer_size)
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{
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if (logger == NULL)
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return -1;
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logger->buffer.data = calloc(buffer_size, sizeof(char));
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if (logger->buffer.data == NULL)
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return -1;
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logger->buffer.size = buffer_size;
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logger->buffer.pos = 0;
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return 0;
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}
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/* fugue_logger_quit() : uninit logger internal information */
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int fugue_logger_quit(fugue_logger_t *logger)
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{
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if (logger == NULL)
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return -1;
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if (logger->buffer.data == NULL)
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return -1;
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free(logger->buffer.data);
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logger->buffer.data = NULL;
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logger->buffer.size = 0;
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logger->buffer.pos = 0;
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return 0;
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}
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/* fugue_logger_clear() : clear buffer content */
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int fugue_logger_clear(fugue_logger_t *logger)
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{
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if (logger == NULL)
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return -1;
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memset(logger->buffer.data, 0x00, logger->buffer.size);
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logger->buffer.pos = 0;
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return 0;
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}
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/* fugue_logger_getline() : getline-like function */
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ssize_t fugue_logger_getline(fugue_logger_t *logger, char **str, size_t *ssz)
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{
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char *str_end;
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if (logger == NULL)
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return -1;
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if (*str == NULL) {
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*str = &logger->buffer.data[0];
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} else {
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str_end = &((*str)[*ssz]);
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if (str_end[0] == '\0') {
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*str = NULL;
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*ssz = 0;
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return -1;
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}
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if (str_end[0] == '\n') {
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*str = &str_end[1];
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}
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}
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str_end = strchrnul(*str, '\n');
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*ssz = (ptrdiff_t)(str_end - *str);
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return 0;
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}
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/* fugue_logger_vwrite() : write primitive (va-arg) */
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ssize_t fugue_logger_vwrite(fugue_logger_t *logger, char *format, va_list ap)
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{
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int sz;
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if (logger == NULL)
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return -1;
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if (logger->buffer.pos >= (signed)logger->buffer.size)
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return -1;
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sz = vsnprintf(
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&logger->buffer.data[logger->buffer.pos],
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logger->buffer.size - logger->buffer.pos,
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format,
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ap
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);
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logger->buffer.pos += sz;
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return sz;
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}
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/* fugue_logger_write() : write primitive (va-arg) */
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ssize_t fugue_logger_write(fugue_logger_t *logger, char *format, ...)
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{
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va_list ap;
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ssize_t sz;
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if (logger == NULL)
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return -1;
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va_start(ap, format);
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sz = fugue_logger_vwrite(logger, format, ap);
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va_end(ap);
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return sz;
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}
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