forked from jqlang/jq
/
main.c
171 lines (153 loc) · 4.54 KB
/
main.c
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#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include "compile.h"
#include "builtin.h"
#include "jv.h"
#include "jv_parse.h"
#include "locfile.h"
#include "parser.h"
#include "execute.h"
static const char* progname;
static void usage() {
fprintf(stderr, "\njq - commandline JSON processor\n");
fprintf(stderr, "Usage: %s [options] <jq filter>\n\n", progname);
fprintf(stderr, "For a description of the command line options and\n");
fprintf(stderr, "how to write jq filters (and why you might want to)\n");
fprintf(stderr, "see the jq documentation at http://stedolan.github.com/jq\n\n");
exit(1);
}
static void die() {
fprintf(stderr, "Use %s --help for help with command-line options,\n", progname);
fprintf(stderr, "or see the jq documentation at http://stedolan.github.com/jq\n");
exit(1);
}
static int isoptish(const char* text) {
return text[0] == '-' && (text[1] == '-' || isalpha(text[1]));
}
static int isoption(const char* text, char shortopt, const char* longopt) {
if (text[0] != '-') return 0;
if (strlen(text) == 2 && text[1] == shortopt) return 1;
if (text[1] == '-' && !strcmp(text+2, longopt)) return 1;
return 0;
}
enum {
SLURP = 1,
RAW_INPUT = 2,
PROVIDE_NULL = 4,
RAW_OUTPUT = 8,
COMPACT_OUTPUT = 16,
ASCII_OUTPUT = 32,
};
static int options = 0;
static struct bytecode* bc;
static void process(jv value) {
jq_init(bc, value);
jv result;
while (jv_is_valid(result = jq_next())) {
if ((options & RAW_OUTPUT) && jv_get_kind(result) == JV_KIND_STRING) {
fwrite(jv_string_value(result), 1, jv_string_length(jv_copy(result)), stdout);
} else {
int dumpopts = 0;
if (!(options & COMPACT_OUTPUT)) dumpopts |= JV_PRINT_PRETTY;
if (options & ASCII_OUTPUT) dumpopts |= JV_PRINT_ASCII;
jv_dump(result, dumpopts);
}
printf("\n");
}
jv_free(result);
jq_teardown();
}
int main(int argc, char* argv[]) {
if (argc) progname = argv[0];
const char* program = 0;
for (int i=1; i<argc; i++) {
if (!isoptish(argv[i])) {
if (program) usage();
program = argv[i];
} else if (isoption(argv[i], 's', "slurp")) {
options |= SLURP;
} else if (isoption(argv[i], 'r', "raw-output")) {
options |= RAW_OUTPUT;
} else if (isoption(argv[i], 'c', "compact-output")) {
options |= COMPACT_OUTPUT;
} else if (isoption(argv[i], 'a', "ascii-output")) {
options |= ASCII_OUTPUT;
} else if (isoption(argv[i], 'R', "raw-input")) {
options |= RAW_INPUT;
} else if (isoption(argv[i], 'n', "null-input")) {
options |= PROVIDE_NULL;
} else if (isoption(argv[i], 'h', "help")) {
usage();
} else {
fprintf(stderr, "%s: Unknown option %s\n", progname, argv[i]);
die();
}
}
if (!program) usage();
if ((options & PROVIDE_NULL) && (options & (RAW_INPUT | SLURP))) {
fprintf(stderr, "%s: --null-input cannot be used with --raw-input or --slurp\n", program);
die();
}
bc = jq_compile(program);
if (!bc) return 1;
#if JQ_DEBUG
dump_disassembly(0, bc);
printf("\n");
#endif
if (options & PROVIDE_NULL) {
process(jv_null());
} else {
jv slurped;
if (options & SLURP) slurped = jv_invalid();
int first = 1;
struct jv_parser parser;
jv_parser_init(&parser);
while (!feof(stdin)) {
char buf[4096];
if (!fgets(buf, sizeof(buf), stdin)) buf[0] = 0;
if (options & RAW_INPUT) {
int len = strlen(buf);
if (len > 0) {
if (options & SLURP) {
if (first) slurped = jv_string(buf);
else slurped = jv_string_concat(slurped, jv_string(buf));
} else {
if (buf[len-1] == '\n') buf[len-1] = 0;
process(jv_string(buf));
}
}
} else {
jv_parser_set_buf(&parser, buf, strlen(buf), !feof(stdin));
jv value;
while (jv_is_valid((value = jv_parser_next(&parser)))) {
if (options & SLURP) {
if (first) slurped = jv_array();
slurped = jv_array_append(slurped, value);
} else {
process(value);
}
}
if (jv_invalid_has_msg(jv_copy(value))) {
jv msg = jv_invalid_get_msg(value);
fprintf(stderr, "parse error: %s\n", jv_string_value(msg));
jv_free(msg);
break;
} else {
jv_free(value);
}
}
first = 0;
}
jv_parser_free(&parser);
if (options & SLURP) {
if (jv_is_valid(slurped)) {
process(slurped);
} else {
jv_free(slurped);
}
}
}
bytecode_free(bc);
return 0;
}