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/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include "parse.h"
#include "oid.h"
int git_parse_ctx_init(git_parse_ctx *ctx, const char *content, size_t content_len)
{
if (content && content_len) {
ctx->content = content;
ctx->content_len = content_len;
} else {
ctx->content = "";
ctx->content_len = 0;
}
ctx->remain = ctx->content;
ctx->remain_len = ctx->content_len;
ctx->line = ctx->remain;
ctx->line_len = git__linenlen(ctx->line, ctx->remain_len);
ctx->line_num = 1;
return 0;
}
void git_parse_ctx_clear(git_parse_ctx *ctx)
{
memset(ctx, 0, sizeof(*ctx));
ctx->content = "";
}
void git_parse_advance_line(git_parse_ctx *ctx)
{
ctx->line += ctx->line_len;
ctx->remain_len -= ctx->line_len;
ctx->line_len = git__linenlen(ctx->line, ctx->remain_len);
ctx->line_num++;
}
void git_parse_advance_chars(git_parse_ctx *ctx, size_t char_cnt)
{
ctx->line += char_cnt;
ctx->remain_len -= char_cnt;
ctx->line_len -= char_cnt;
}
int git_parse_advance_expected(
git_parse_ctx *ctx,
const char *expected,
size_t expected_len)
{
if (ctx->line_len < expected_len)
return -1;
if (memcmp(ctx->line, expected, expected_len) != 0)
return -1;
git_parse_advance_chars(ctx, expected_len);
return 0;
}
int git_parse_advance_ws(git_parse_ctx *ctx)
{
int ret = -1;
while (ctx->line_len > 0 &&
ctx->line[0] != '\n' &&
git__isspace(ctx->line[0])) {
ctx->line++;
ctx->line_len--;
ctx->remain_len--;
ret = 0;
}
return ret;
}
int git_parse_advance_nl(git_parse_ctx *ctx)
{
if (ctx->line_len != 1 || ctx->line[0] != '\n')
return -1;
git_parse_advance_line(ctx);
return 0;
}
int git_parse_advance_digit(int64_t *out, git_parse_ctx *ctx, int base)
{
const char *end;
int ret;
if (ctx->line_len < 1 || !git__isdigit(ctx->line[0]))
return -1;
if ((ret = git__strntol64(out, ctx->line, ctx->line_len, &end, base)) < 0)
return -1;
git_parse_advance_chars(ctx, (end - ctx->line));
return 0;
}
int git_parse_advance_oid(git_oid *out, git_parse_ctx *ctx, git_oid_t oid_type)
{
size_t oid_hexsize = git_oid_hexsize(oid_type);
GIT_ASSERT(oid_hexsize);
if (ctx->line_len < oid_hexsize)
return -1;
if ((git_oid__fromstrn(out, ctx->line, oid_hexsize, oid_type)) < 0)
return -1;
git_parse_advance_chars(ctx, oid_hexsize);
return 0;
}
int git_parse_peek(char *out, git_parse_ctx *ctx, int flags)
{
size_t remain = ctx->line_len;
const char *ptr = ctx->line;
while (remain) {
char c = *ptr;
if ((flags & GIT_PARSE_PEEK_SKIP_WHITESPACE) &&
git__isspace(c)) {
remain--;
ptr++;
continue;
}
*out = c;
return 0;
}
return -1;
}
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