mirror of
https://github.com/stedolan/jq.git
synced 2024-05-11 05:55:39 +00:00
104 lines
2.5 KiB
C
104 lines
2.5 KiB
C
#include <assert.h>
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#include <errno.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "jq.h"
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#include "jv_alloc.h"
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#include "locfile.h"
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void locfile_init(struct locfile* l, jq_state *jq, const char* data, int length) {
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l->jq = jq;
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l->data = data;
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l->length = length;
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l->nlines = 1;
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for (int i=0; i<length; i++) {
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if (data[i] == '\n') l->nlines++;
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}
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l->linemap = jv_mem_alloc(sizeof(int) * (l->nlines + 1));
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l->linemap[0] = 0;
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int line = 1;
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for (int i=0; i<length; i++) {
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if (data[i] == '\n') {
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l->linemap[line] = i+1; // at start of line, not of \n
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line++;
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}
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}
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l->linemap[l->nlines] = length+1; // virtual last \n
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}
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void locfile_free(struct locfile* l) {
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jv_mem_free(l->linemap);
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}
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static int locfile_get_line(struct locfile* l, int pos) {
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assert(pos < l->length);
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int line = 1;
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while (l->linemap[line] <= pos) line++; // == if pos at start (before, never ==, because pos never on \n)
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assert(line-1 < l->nlines);
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return line-1;
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}
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static int locfile_line_length(struct locfile* l, int line) {
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assert(line < l->nlines);
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return l->linemap[line+1] - l->linemap[line] -1; // -1 to omit \n
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}
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void locfile_locate(struct locfile* l, location loc, const char* fmt, ...) {
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jq_err_cb cb;
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void *cb_data;
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va_list fmtargs;
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va_start(fmtargs, fmt);
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int startline;
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int offset;
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if (loc.start != -1) {
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startline = locfile_get_line(l, loc.start);
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offset = l->linemap[startline];
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}
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jq_get_error_cb(l->jq, &cb, &cb_data);
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jv m1 = jv_string_vfmt(fmt, fmtargs);
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if (!jv_is_valid(m1)) {
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jv_free(m1);
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goto enomem;
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}
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jv m2;
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if (loc.start == -1) {
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m2 = jv_string_fmt("%s\n<unknown location>", jv_string_value(m1));
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if (cb)
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cb(cb_data, m2);
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else
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fprintf(stderr, "%s", jv_string_value(m2));
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jv_free(m1);
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jv_free(m2);
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return;
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}
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m2 = jv_string_fmt("%s\n%.*s%*s", jv_string_value(m1),
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locfile_line_length(l, startline), l->data + offset,
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loc.start - offset, "");
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jv_free(m1);
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if (!jv_is_valid(m2)) {
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jv_free(m2);
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goto enomem;
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}
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if (cb)
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cb(cb_data, m2);
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else
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fprintf(stderr, "%s", jv_string_value(m2));
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jv_free(m2);
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return;
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enomem:
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if (cb != NULL)
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cb(cb_data, jv_invalid());
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else if (errno == ENOMEM || errno == 0)
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vfprintf(stderr, "Error formatting jq compilation error: %s", strerror(errno ? errno : ENOMEM));
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else
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vfprintf(stderr, "Error formatting jq compilation error: %s", strerror(errno));
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return;
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}
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