mirror of https://github.com/pygos/pkg-utils.git
114 lines
1.9 KiB
C
114 lines
1.9 KiB
C
#include "pack.h"
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static int handle_requires(input_file_t *f, pkg_desc_t *desc)
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{
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char *ptr = f->line, *end;
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dependency_t *dep;
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size_t len;
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while (*ptr != '\0') {
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while (isspace(*ptr))
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++ptr;
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end = ptr;
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while (*end != '\0' && !isspace(*end))
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++end;
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len = end - ptr;
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if (len == 0)
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break;
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if (len > 0xFF) {
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fprintf(stderr, "%s: %zu: dependency name too long\n",
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f->filename, f->linenum);
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return -1;
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}
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dep = calloc(1, sizeof(*dep) + len + 1);
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if (dep == NULL) {
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fprintf(stderr, "%s: %zu: out of memory\n",
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f->filename, f->linenum);
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return -1;
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}
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memcpy(dep->name, ptr, len);
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dep->type = PKG_DEPENDENCY_REQUIRES;
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dep->next = desc->deps;
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desc->deps = dep;
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ptr = end;
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}
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return 0;
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}
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static const struct {
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const char *name;
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int (*handle)(input_file_t *f, pkg_desc_t *desc);
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} line_hooks[] = {
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{ "requires", handle_requires },
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};
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#define NUM_LINE_HOOKS (sizeof(line_hooks) / sizeof(line_hooks[0]))
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int desc_read(const char *path, pkg_desc_t *desc)
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{
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input_file_t f;
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size_t i, len;
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char *ptr;
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int ret;
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memset(desc, 0, sizeof(*desc));
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if (open_file(&f, path))
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return -1;
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for (;;) {
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ret = prefetch_line(&f);
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if (ret < 0)
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goto fail;
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if (ret > 0)
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break;
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ptr = f.line;
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for (i = 0; i < NUM_LINE_HOOKS; ++i) {
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len = strlen(line_hooks[i].name);
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if (strncmp(ptr, line_hooks[i].name, len) != 0)
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continue;
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if (!isspace(ptr[len]) && ptr[len] != '\0')
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continue;
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for (ptr += len; isspace(*ptr); ++ptr)
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;
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memmove(f.line, ptr, strlen(ptr) + 1);
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break;
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}
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if (i == NUM_LINE_HOOKS) {
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fprintf(stderr, "%s: %zu: unknown description field\n",
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f.filename, f.linenum);
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goto fail;
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}
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ret = line_hooks[i].handle(&f, desc);
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if (ret)
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goto fail;
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}
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return 0;
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fail:
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return -1;
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}
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void desc_free(pkg_desc_t *desc)
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{
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dependency_t *dep;
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while (desc->deps != NULL) {
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dep = desc->deps;
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desc->deps = dep->next;
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free(dep);
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}
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}
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