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31be4a0495ff0695735c061e11da5dc0d548ae55
stedolan-jq/jv_print.c
David Tolnay 8f55d6d4ab Use https where possible
2015-08-15 12:23:16 -07:00

349 lines
10 KiB
C
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#include <assert.h>
#include <stdio.h>
#include <float.h>
#include <string.h>
#ifdef WIN32
#include <windows.h>
#include <io.h>
#include <fileapi.h>
#endif
#include "jv.h"
#include "jv_dtoa.h"
#include "jv_unicode.h"
#define ESC "\033"
#define COL(c) (ESC "[" c "m")
#define COLRESET (ESC "[0m")
// Colour table. See https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
// for how to choose these.
static const jv_kind colour_kinds[] =
{JV_KIND_NULL, JV_KIND_FALSE, JV_KIND_TRUE, JV_KIND_NUMBER,
JV_KIND_STRING, JV_KIND_ARRAY, JV_KIND_OBJECT};
static const char* const colours[] =
{COL("1;30"), COL("0;39"), COL("0;39"), COL("0;39"),
COL("0;32"), COL("1;39"), COL("1;39")};
#define FIELD_COLOUR COL("34;1")
static void put_buf(const char *s, int len, FILE *fout, jv *strout, int is_tty) {
if (strout) {
*strout = jv_string_append_buf(*strout, s, len);
} else {
#ifdef WIN32
/* See util.h */
if (is_tty)
WriteFile((HANDLE)_get_osfhandle(fileno(fout)), s, len, NULL, NULL);
else
fwrite(s, 1, len, fout);
#else
fwrite(s, 1, len, fout);
#endif
}
}
static void put_char(char c, FILE* fout, jv* strout, int T) {
put_buf(&c, 1, fout, strout, T);
}
static void put_str(const char* s, FILE* fout, jv* strout, int T) {
put_buf(s, strlen(s), fout, strout, T);
}
static void put_indent(int n, int flags, FILE* fout, jv* strout, int T) {
if (flags & JV_PRINT_TAB) {
while (n--)
put_char('\t', fout, strout, T);
} else {
n *= ((flags & (JV_PRINT_SPACE0 | JV_PRINT_SPACE1 | JV_PRINT_SPACE2)) >> 8);
while (n--)
put_char(' ', fout, strout, T);
}
}
static void jvp_dump_string(jv str, int ascii_only, FILE* F, jv* S, int T) {
assert(jv_get_kind(str) == JV_KIND_STRING);
const char* i = jv_string_value(str);
const char* end = i + jv_string_length_bytes(jv_copy(str));
const char* cstart;
int c = 0;
char buf[32];
put_char('"', F, S, T);
while ((i = jvp_utf8_next((cstart = i), end, &c))) {
assert(c != -1);
int unicode_escape = 0;
if (0x20 <= c && c <= 0x7E) {
// printable ASCII
if (c == '"' || c == '\\') {
put_char('\\', F, S, T);
}
put_char(c, F, S, T);
} else if (c < 0x20 || c == 0x7F) {
// ASCII control character
switch (c) {
case '\b':
put_char('\\', F, S, T);
put_char('b', F, S, T);
break;
case '\t':
put_char('\\', F, S, T);
put_char('t', F, S, T);
break;
case '\r':
put_char('\\', F, S, T);
put_char('r', F, S, T);
break;
case '\n':
put_char('\\', F, S, T);
put_char('n', F, S, T);
break;
case '\f':
put_char('\\', F, S, T);
put_char('f', F, S, T);
break;
default:
unicode_escape = 1;
break;
}
} else {
if (ascii_only) {
unicode_escape = 1;
} else {
put_buf(cstart, i - cstart, F, S, T);
}
}
if (unicode_escape) {
if (c <= 0xffff) {
sprintf(buf, "\\u%04x", c);
} else {
c -= 0x10000;
sprintf(buf, "\\u%04x\\u%04x",
0xD800 | ((c & 0xffc00) >> 10),
0xDC00 | (c & 0x003ff));
}
put_str(buf, F, S, T);
}
}
assert(c != -1);
put_char('"', F, S, T);
}
static void put_refcnt(struct dtoa_context* C, int refcnt, FILE *F, jv* S, int T){
char buf[JVP_DTOA_FMT_MAX_LEN];
put_char(' ', F, S, T);
put_char('(', F, S, T);
put_str(jvp_dtoa_fmt(C, buf, refcnt), F, S, T);
put_char(')', F, S, T);
}
static void jv_dump_term(struct dtoa_context* C, jv x, int flags, int indent, FILE* F, jv* S) {
char buf[JVP_DTOA_FMT_MAX_LEN];
const char* colour = 0;
double refcnt = (flags & JV_PRINT_REFCOUNT) ? jv_get_refcnt(x) - 1 : -1;
if (flags & JV_PRINT_COLOUR) {
for (unsigned i=0; i<sizeof(colour_kinds)/sizeof(colour_kinds[0]); i++) {
if (jv_get_kind(x) == colour_kinds[i]) {
colour = colours[i];
put_str(colour, F, S, flags & JV_PRINT_ISATTY);
break;
}
}
}
switch (jv_get_kind(x)) {
default:
case JV_KIND_INVALID:
if (flags & JV_PRINT_INVALID) {
jv msg = jv_invalid_get_msg(jv_copy(x));
if (jv_get_kind(msg) == JV_KIND_STRING) {
put_str("<invalid:", F, S, flags & JV_PRINT_ISATTY);
jvp_dump_string(msg, flags | JV_PRINT_ASCII, F, S, flags & JV_PRINT_ISATTY);
put_str(">", F, S, flags & JV_PRINT_ISATTY);
} else {
put_str("<invalid>", F, S, flags & JV_PRINT_ISATTY);
}
} else {
assert(0 && "Invalid value");
}
break;
case JV_KIND_NULL:
put_str("null", F, S, flags & JV_PRINT_ISATTY);
break;
case JV_KIND_FALSE:
put_str("false", F, S, flags & JV_PRINT_ISATTY);
break;
case JV_KIND_TRUE:
put_str("true", F, S, flags & JV_PRINT_ISATTY);
break;
case JV_KIND_NUMBER: {
double d = jv_number_value(x);
if (d != d) {
// JSON doesn't have NaN, so we'll render it as "null"
put_str("null", F, S, flags & JV_PRINT_ISATTY);
} else {
// Normalise infinities to something we can print in valid JSON
if (d > DBL_MAX) d = DBL_MAX;
if (d < -DBL_MAX) d = -DBL_MAX;
put_str(jvp_dtoa_fmt(C, buf, d), F, S, flags & JV_PRINT_ISATTY);
}
break;
}
case JV_KIND_STRING:
jvp_dump_string(x, flags & JV_PRINT_ASCII, F, S, flags & JV_PRINT_ISATTY);
if (flags & JV_PRINT_REFCOUNT)
put_refcnt(C, refcnt, F, S, flags & JV_PRINT_ISATTY);
break;
case JV_KIND_ARRAY: {
if (jv_array_length(jv_copy(x)) == 0) {
put_str("[]", F, S, flags & JV_PRINT_ISATTY);
break;
}
put_str("[", F, S, flags & JV_PRINT_ISATTY);
if (flags & JV_PRINT_PRETTY) {
put_char('\n', F, S, flags & JV_PRINT_ISATTY);
put_indent(indent + 1, flags, F, S, flags & JV_PRINT_ISATTY);
}
jv_array_foreach(x, i, elem) {
if (i!=0) {
if (flags & JV_PRINT_PRETTY) {
put_str(",\n", F, S, flags & JV_PRINT_ISATTY);
put_indent(indent + 1, flags, F, S, flags & JV_PRINT_ISATTY);
} else {
put_str(",", F, S, flags & JV_PRINT_ISATTY);
}
}
jv_dump_term(C, elem, flags, indent + 1, F, S);
if (colour) put_str(colour, F, S, flags & JV_PRINT_ISATTY);
}
if (flags & JV_PRINT_PRETTY) {
put_char('\n', F, S, flags & JV_PRINT_ISATTY);
put_indent(indent, flags, F, S, flags & JV_PRINT_ISATTY);
}
if (colour) put_str(colour, F, S, flags & JV_PRINT_ISATTY);
put_char(']', F, S, flags & JV_PRINT_ISATTY);
if (flags & JV_PRINT_REFCOUNT)
put_refcnt(C, refcnt, F, S, flags & JV_PRINT_ISATTY);
break;
}
case JV_KIND_OBJECT: {
if (jv_object_length(jv_copy(x)) == 0) {
put_str("{}", F, S, flags & JV_PRINT_ISATTY);
break;
}
put_char('{', F, S, flags & JV_PRINT_ISATTY);
if (flags & JV_PRINT_PRETTY) {
put_char('\n', F, S, flags & JV_PRINT_ISATTY);
put_indent(indent + 1, flags, F, S, flags & JV_PRINT_ISATTY);
}
int first = 1;
int i = 0;
jv keyset = jv_null();
while (1) {
jv key, value;
if (flags & JV_PRINT_SORTED) {
if (first) {
keyset = jv_keys(jv_copy(x));
i = 0;
} else {
i++;
}
if (i >= jv_array_length(jv_copy(keyset))) {
jv_free(keyset);
break;
}
key = jv_array_get(jv_copy(keyset), i);
value = jv_object_get(jv_copy(x), jv_copy(key));
} else {
if (first) {
i = jv_object_iter(x);
} else {
i = jv_object_iter_next(x, i);
}
if (!jv_object_iter_valid(x, i)) break;
key = jv_object_iter_key(x, i);
value = jv_object_iter_value(x, i);
}
if (!first) {
if (flags & JV_PRINT_PRETTY){
put_str(",\n", F, S, flags & JV_PRINT_ISATTY);
put_indent(indent + 1, flags, F, S, flags & JV_PRINT_ISATTY);
} else {
put_str(",", F, S, flags & JV_PRINT_ISATTY);
}
}
if (colour) put_str(COLRESET, F, S, flags & JV_PRINT_ISATTY);
first = 0;
if (colour) put_str(FIELD_COLOUR, F, S, flags & JV_PRINT_ISATTY);
jvp_dump_string(key, flags & JV_PRINT_ASCII, F, S, flags & JV_PRINT_ISATTY);
jv_free(key);
if (colour) put_str(COLRESET, F, S, flags & JV_PRINT_ISATTY);
if (colour) put_str(colour, F, S, flags & JV_PRINT_ISATTY);
put_str((flags & JV_PRINT_PRETTY) ? ": " : ":", F, S, flags & JV_PRINT_ISATTY);
if (colour) put_str(COLRESET, F, S, flags & JV_PRINT_ISATTY);
jv_dump_term(C, value, flags, indent + 1, F, S);
if (colour) put_str(colour, F, S, flags & JV_PRINT_ISATTY);
}
if (flags & JV_PRINT_PRETTY) {
put_char('\n', F, S, flags & JV_PRINT_ISATTY);
put_indent(indent, flags, F, S, flags & JV_PRINT_ISATTY);
}
if (colour) put_str(colour, F, S, flags & JV_PRINT_ISATTY);
put_char('}', F, S, flags & JV_PRINT_ISATTY);
if (flags & JV_PRINT_REFCOUNT)
put_refcnt(C, refcnt, F, S, flags & JV_PRINT_ISATTY);
}
}
jv_free(x);
if (colour) {
put_str(COLRESET, F, S, flags & JV_PRINT_ISATTY);
}
}
void jv_dumpf(jv x, FILE *f, int flags) {
struct dtoa_context C;
jvp_dtoa_context_init(&C);
jv_dump_term(&C, x, flags, 0, f, 0);
jvp_dtoa_context_free(&C);
}
void jv_dump(jv x, int flags) {
jv_dumpf(x, stdout, flags);
}
/* This one is nice for use in debuggers */
void jv_show(jv x, int flags) {
if (flags == -1)
flags = JV_PRINT_PRETTY | JV_PRINT_COLOUR | JV_PRINT_INDENT_FLAGS(2);
jv_dumpf(jv_copy(x), stderr, flags | JV_PRINT_INVALID);
fflush(stderr);
}
jv jv_dump_string(jv x, int flags) {
struct dtoa_context C;
jvp_dtoa_context_init(&C);
jv s = jv_string("");
jv_dump_term(&C, x, flags, 0, 0, &s);
jvp_dtoa_context_free(&C);
return s;
}
char *jv_dump_string_trunc(jv x, char *outbuf, size_t bufsize) {
x = jv_dump_string(x,0);
const char* p = jv_string_value(x);
const size_t len = strlen(p);
strncpy(outbuf, p, bufsize);
outbuf[bufsize - 1] = 0;
if (len > bufsize - 1 && bufsize >= 4) {
// Indicate truncation with '...'
outbuf[bufsize - 2]='.';
outbuf[bufsize - 3]='.';
outbuf[bufsize - 4]='.';
}
jv_free(x);
return outbuf;
}
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