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<
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "shared.h"

/* A majority of lines in files.json
are less than 80 characters long. */
#define GUESS 80
/* Each informative line has 6 spaces,
a quote, then the data type, then a quote,
then a colon, then a space, then a quote,
then the data, terminated by a quote.
The length of the data type's name plus
11 characters precedes the data on each line. */
#define PREFIX 11

void
stripquote(char *str)
{
	int i;
	for (i = 0; str[i] != '\0'; ++i)
		if (str[i] == '"') {
			str[i] = '\0';
			break;
		}
}

int
dircmp(char *dir, char *str)
{
	int slashes = 0, i;
	for (i = 0; str[i] != '\0'; ++i)
		if (str[i] == '/')
			++slashes;
	if (dir == NULL) {
		if (! slashes)
			return 1;
		return 0;
	}

	int diff = 0, dirslashes = 0, dirlen = 0;
	for (i = 0; dir[i] != '\0'; ++i) {
		if (dir[i] != str[i]) {
			diff = 1;
			break;
		}
		if (dir[i] == '/')
			++dirslashes;
		++dirlen;
	}
	if (diff)
		return 0;

	/* Account for a trailing slash. */
	if (dir[dirlen - 1] == '/')
		--dirslashes;
	if (slashes - dirslashes < 2)
		return 1;
	return 0;
}

void
printentry(int long_format, int size, char *path, int is_directory,
	char *sha1_hash, char *updated_at)
{
	if (long_format) {
		/* The longest 31-bit int is 10 digits.
		If the file size is larger, there's worse problems. */
		printf("%10d ", size);
		int i;
		for (i = 0; i < 20; ++i)
			putchar(updated_at[5 + i]);
		putchar(' ');
	}
	printf("%s", path);
	if (is_directory)
		putchar('/');
	putchar('\n');
}

char *infn = "files.json";
/* neols [-l] [wildcard] */
int
main(int argc, char **argv)
{
	FILE *in = fopen(infn, "r");
	if (in == NULL) {
		puts("files.json isn't in the working directory.");
		return 1;
	}
	int i;
	int long_format = 0;
	char *dir = NULL;
	for (i = 1; i < argc; ++i) {
		if (strcmp(argv[i], "-l") == 0)
			long_format = 1;
		else
			dir = argv[i];
	}
	char *line;
	/* The various statistics related to each entry are stored,
	one entry at a time. A path may be any size, so each line need
	be handled by realloc. */
	char *path = NULL, *updated_at = NULL, *sha1_hash = NULL;
	int is_directory = 0, size = 0;
	int end, len;
	for (end = 0; ! end;) {
		line = storeline(in, &end, &len, GUESS);
		/* Only on lines terminating an entry, '}' is the
		fifth character. The ninth character of each data
		line is unique. */
		if (line[4] == '}') {
			char *p = path + PREFIX + strlen("size");
			if (dircmp(dir, p)) {
				printentry(long_format, size, p,
					is_directory, sha1_hash + PREFIX
					+ strlen("sha1_hash"),
					updated_at + PREFIX +
					strlen("updated_at"));
			}
			free(path);
			free(updated_at);
			free(sha1_hash);
			sha1_hash = NULL;
			size = 0;
			free(line);
		} else if (line[8] == 'a') {
			path = line;
			stripquote(path + strlen("path") + PREFIX);
		} else if (line[8] == 's') {
			if (strstr(line, "false") != NULL)
				is_directory = 0;
			else
				is_directory = 1;
			free(line);
		} else if (line[8] == 'i') {
			line[len - 1] = '\0';
			size = atoi(line + PREFIX + strlen("size"));
			free(line);
		} else if (line[8] == 'p') {
			updated_at = line;
			stripquote(updated_at);
		} else if (line[8] == 'h') {
			sha1_hash = line;
		}
	}
	return 0;
}
>"Normal"> . </span> <span class="subxComment"># copy EAX to EDX</span> <span id="L25" class="LineNr"> 25 </span> <span class="subxS1Comment"># . EAX += 12</span> <span id="L26" class="LineNr"> 26 </span> 05/add-to-EAX 0xc/imm32 <span id="L27" class="LineNr"> 27 </span> <span class="subxComment"># allocate(ad, n)</span> <span id="L28" class="LineNr"> 28 </span> <span class="subxS2Comment"># . . push args</span> <span id="L29" class="LineNr"> 29 </span> 50/push-EAX <span id="L30" class="LineNr"> 30 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(EBP+8)</span> <span id="L31" class="LineNr"> 31 </span> <span class="subxS2Comment"># . . call</span> <span id="L32" class="LineNr"> 32 </span> e8/call <a href='069allocate.subx.html#L26'>allocate</a>/disp32 <span id="L33" class="LineNr"> 33 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L34" class="LineNr"> 34 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to ESP</span> <span id="L35" class="LineNr"> 35 </span> <span class="subxComment"># EAX-&gt;length = elemsize*length</span> <span id="L36" class="LineNr"> 36 </span> 89/copy 1/mod/*+disp8 0/rm32/EAX <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/EDX 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy EDX to *(EAX+8)</span> <span id="L37" class="LineNr"> 37 </span> <span class="subxComment"># clear-stream(EAX)</span> <span id="L38" class="LineNr"> 38 </span> <span class="subxS2Comment"># . . push args</span> <span id="L39" class="LineNr"> 39 </span> 50/push-EAX <span id="L40" class="LineNr"> 40 </span> <span class="subxS2Comment"># . . call</span> <span id="L41" class="LineNr"> 41 </span> e8/call <a href='055stream.subx.html#L17'>clear-stream</a>/disp32 <span id="L42" class="LineNr"> 42 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L43" class="LineNr"> 43 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to ESP</span> <span id="L44" class="LineNr"> 44 </span><span class="Constant">$new-stream:end</span>: <span id="L45" class="LineNr"> 45 </span> <span class="subxS1Comment"># . restore registers</span> <span id="L46" class="LineNr"> 46 </span> 5a/pop-to-EDX <span id="L47" class="LineNr"> 47 </span> <span class="subxS1Comment"># . epilog</span> <span id="L48" class="LineNr"> 48 </span> 89/copy 3/mod/direct 4/rm32/ESP <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/EBP <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy EBP to ESP</span> <span id="L49" class="LineNr"> 49 </span> 5d/pop-to-EBP <span id="L50" class="LineNr"> 50 </span> c3/return <span id="L51" class="LineNr"> 51 </span> <span id="L52" class="LineNr"> 52 </span><span class="Constant">$new-stream:abort</span>: <span id="L53" class="LineNr"> 53 </span> <span class="subxS1Comment"># . _write(2/stderr, error)</span> <span id="L54" class="LineNr"> 54 </span> <span class="subxS2Comment"># . . push args</span> <span id="L55" class="LineNr"> 55 </span> 68/push <span class="Constant">&quot;new-stream: size too large\n&quot;</span>/imm32 <span id="L56" class="LineNr"> 56 </span> 68/push 2/imm32/stderr <span id="L57" class="LineNr"> 57 </span> <span class="subxS2Comment"># . . call</span> <span id="L58" class="LineNr"> 58 </span> e8/call <a href='050_write.subx.html#L14'>_write</a>/disp32 <span id="L59" class="LineNr"> 59 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L60" class="LineNr"> 60 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to ESP</span> <span id="L61" class="LineNr"> 61 </span> <span class="subxS1Comment"># . syscall(exit, 1)</span> <span id="L62" class="LineNr"> 62 </span> bb/copy-to-EBX 1/imm32 <span id="L63" class="LineNr"> 63 </span> b8/copy-to-EAX 1/imm32/exit <span id="L64" class="LineNr"> 64 </span> cd/syscall 0x80/imm8 <span id="L65" class="LineNr"> 65 </span> <span class="subxComment"># never gets here</span> <span id="L66" class="LineNr"> 66 </span> <span id="L67" class="LineNr"> 67 </span><span class="subxTest">test-new-stream</span>: <span id="L68" class="LineNr"> 68 </span> <span class="subxS1Comment"># . prolog</span> <span id="L69" class="LineNr"> 69 </span> 55/push-EBP <span id="L70" class="LineNr"> 70 </span> 89/copy 3/mod/direct 5/rm32/EBP <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/ESP <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ESP to EBP</span> <span id="L71" class="LineNr"> 71 </span> <span class="subxComment"># var heap/ECX : (address allocation-descriptor) = {0, 0}</span> <span id="L72" class="LineNr"> 72 </span> 68/push 0/imm32/limit <span id="L73" class="LineNr"> 73 </span> 68/push 0/imm32/curr <span id="L74" class="LineNr"> 74 </span> 89/copy 3/mod/direct 1/rm32/ECX <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/ESP <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ESP to ECX</span> <span id="L75" class="LineNr"> 75 </span> <span class="subxComment"># heap = new-segment(512)</span> <span id="L76" class="LineNr"> 76 </span> <span class="subxS2Comment"># . . push args</span> <span id="L77" class="LineNr"> 77 </span> 51/push-ECX <span id="L78" class="LineNr"> 78 </span> 68/push 0x200/imm32 <span id="L79" class="LineNr"> 79 </span> <span class="subxS2Comment"># . . call</span> <span id="L80" class="LineNr"> 80 </span> e8/call <a href='053new-segment.subx.html#L41'>new-segment</a>/disp32 <span id="L81" class="LineNr"> 81 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L82" class="LineNr"> 82 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to ESP</span> <span id="L83" class="LineNr"> 83 </span> <span class="subxComment"># var start/EDX = ad-&gt;curr</span> <span id="L84" class="LineNr"> 84 </span> 8b/copy 0/mod/indirect 1/rm32/ECX <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/EDX <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy *ECX to EDX</span> <span id="L85" class="LineNr"> 85 </span> <span class="subxComment"># EAX = new-stream(heap, 3, 2)</span> <span id="L86" class="LineNr"> 86 </span> <span class="subxS2Comment"># . . push args</span> <span id="L87" class="LineNr"> 87 </span> 68/push 2/imm32 <span id="L88" class="LineNr"> 88 </span> 68/push 3/imm32 <span id="L89" class="LineNr"> 89 </span> 51/push-ECX <span id="L90" class="LineNr"> 90 </span> <span class="subxS2Comment"># . . call</span> <span id="L91" class="LineNr"> 91 </span> e8/call <a href='070new-stream.subx.html#L8'>new-stream</a>/disp32 <span id="L92" class="LineNr"> 92 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L93" class="LineNr"> 93 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to ESP</span> <span id="L94" class="LineNr"> 94 </span> <span class="subxComment"># check-ints-equal(EAX, EDX, msg)</span> <span id="L95" class="LineNr"> 95 </span> <span class="subxS2Comment"># . . push args</span> <span id="L96" class="LineNr"> 96 </span> 68/push <span class="Constant">&quot;F - <a href='070new-stream.subx.html#L67'>test-new-stream</a>: returns current pointer of allocation descriptor&quot;</span>/imm32 <span id="L97" class="LineNr"> 97 </span> 52/push-EDX <span id="L98" class="LineNr"> 98 </span> 50/push-EAX <span id="L99" class="LineNr"> 99 </span> <span class="subxS2Comment"># . . call</span> <span id="L100" class="LineNr">100 </span> e8/call <a href='051test.subx.html#L24'>check-ints-equal</a>/disp32 <span id="L101" class="LineNr">101 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L102" class="LineNr">102 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to ESP</span> <span id="L103" class="LineNr">103 </span> <span class="subxComment"># check-ints-equal(EAX-&gt;length, 6, msg)</span> <span id="L104" class="LineNr">104 </span> <span class="subxS2Comment"># . . push args</span> <span id="L105" class="LineNr">105 </span> 68/push <span class="Constant">&quot;F - <a href='070new-stream.subx.html#L67'>test-new-stream</a>: sets length correctly&quot;</span>/imm32 <span id="L106" class="LineNr">106 </span> 68/push 6/imm32 <span id="L107" class="LineNr">107 </span> ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 <span class="subxComment"># push *(EAX+8)</span> <span id="L108" class="LineNr">108 </span> <span class="subxS2Comment"># . . call</span> <span id="L109" class="LineNr">109 </span> e8/call <a href='051test.subx.html#L24'>check-ints-equal</a>/disp32 <span id="L110" class="LineNr">110 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L111" class="LineNr">111 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to ESP</span> <span id="L112" class="LineNr">112 </span> <span class="subxComment"># the rest is delegated to clear-stream() so we won't bother checking it</span> <span id="L113" class="LineNr">113 </span> <span class="subxS1Comment"># . epilog</span> <span id="L114" class="LineNr">114 </span> 89/copy 3/mod/direct 4/rm32/ESP <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/EBP <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy EBP to ESP</span> <span id="L115" class="LineNr">115 </span> 5d/pop-to-EBP <span id="L116" class="LineNr">116 </span> c3/return <span id="L117" class="LineNr">117 </span> <span id="L118" class="LineNr">118 </span><span class="subxS2Comment"># . . vim&#0058;nowrap:textwidth=0</span> </pre> </body> </html> <!-- vim: set foldmethod=manual : -->