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gex-core/utils/ini_writer.c

83 lines
1.7 KiB

7 years ago
//
// Created by MightyPork on 2017/12/01.
//
#include "platform.h"
#include "ini_writer.h"
#ifndef MIN
#define MIN(a,b) ((a)>(b)?(b):(a))
#endif
#ifndef MAX
#define MAX(a,b) ((a)>(b)?(a):(b))
#endif
#define IWBUFFER_LEN 128
// sprintf from varargs, allocating buffer on stack. Uses 'format' argument
#define IW_VPRINTF() do { \
char iwbuffer[IWBUFFER_LEN]; \
va_list args; \
va_start(args, format); \
uint32_t len = (int)fixup_vsnprintf(&iwbuffer[0], IWBUFFER_LEN, format, args); \
iw_buff(iw, (uint8_t *) iwbuffer, len); \
va_end(args); \
} while(0)
void iw_buff(IniWriter *iw, const uint8_t *buf, uint32_t len)
{
if (iw->count == 0) return;
uint32_t skip = 0;
if (iw->skip >= len) {
// Skip entire string
iw->skip -= len;
return;
} else {
// skip part
skip = iw->skip;
iw->skip = 0;
uint32_t count = MIN(iw->count, len-skip);
memcpy(iw->ptr, buf+skip, count);
iw->ptr += count;
iw->count -= count;
}
}
void iw_sprintf(IniWriter *iw, const char *format, ...)
{
if (iw->count == 0) return;
IW_VPRINTF();
}
// High level stuff
void iw_section(IniWriter *iw, const char *format, ...)
{
if (iw->count == 0) return;
iw_string(iw, "\r\n["); // newline before section as a separator
IW_VPRINTF();
iw_string(iw, "]\r\n");
}
void iw_comment(IniWriter *iw, const char *format, ...)
{
if (iw->count == 0) return;
iw_string(iw, "# ");
IW_VPRINTF();
iw_newline(iw);
}
void iw_entry(IniWriter *iw, const char *key, const char *format, ...)
{
if (iw->count == 0) return;
iw_string(iw, key);
iw_string(iw, "=");
IW_VPRINTF();
iw_newline(iw); // one newline after entry
}