ObjFW  Diff

#import "macros.h"

const char *
OFStrPTime(const char *buffer, const char *format, struct tm *tm, short *tz)
{
	enum {
		StateSearchConversionSpecifier,
		StateInConversionSpecifier
	} state = StateSearchConversionSpecifier;
	size_t j, bufferLen, formatLen;

	bufferLen = strlen(buffer);
	formatLen = strlen(format);

	j = 0;
	for (size_t i = 0; i < formatLen; i++) {
		if (j >= bufferLen)
			return NULL;

		switch (state) {
		case StateSearchConversionSpecifier:
			if (format[i] == '%')
				state = StateInConversionSpecifier;
			else if (format[i] != buffer[j++])
				return NULL;

			break;

		case StateInConversionSpecifier:;
			int k, maxLen, number = 0;

			switch (format[i]) {
			case 'd':
			case 'e':
			case 'H':
			case 'm':

				break;
			case 't':
				if (buffer[j++] != '\t')
					return NULL;
				break;
			}

			state = StateSearchConversionSpecifier;

			break;
		}
	}

	return buffer + j;
}