forked from vieter-v/libvieter
140 lines
3.6 KiB
C
140 lines
3.6 KiB
C
#include <stdbool.h>
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#include "package_info.h"
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PkgInfo *package_info_init() {
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return calloc(1, sizeof(PkgInfo));
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}
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void package_info_free(PkgInfo *pkg_info) {
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FREE_STRING(pkg_info->name);
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FREE_STRING(pkg_info->base);
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FREE_STRING(pkg_info->version);
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FREE_STRING(pkg_info->description);
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FREE_STRING(pkg_info->url);
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FREE_STRING(pkg_info->arch);
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FREE_STRING(pkg_info->packager);
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FREE_STRING(pkg_info->pgpsig);
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dynarray_free(pkg_info->groups);
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dynarray_free(pkg_info->licenses);
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dynarray_free(pkg_info->replaces);
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dynarray_free(pkg_info->depends);
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dynarray_free(pkg_info->conflicts);
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dynarray_free(pkg_info->provides);
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dynarray_free(pkg_info->optdepends);
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dynarray_free(pkg_info->makedepends);
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dynarray_free(pkg_info->checkdepends);
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free(pkg_info);
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}
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/**
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* Advance the pointer until all spaces are skipped.
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*/
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static inline char *trim_spaces_front(char *ptr) {
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while (ptr[0] == ' ') {
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ptr++;
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}
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return ptr;
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}
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/**
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* Given a string pointer in the middle of a string, move over all spaces in the
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* given direction. The final space is replaced with a NULL-byte.
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*/
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static inline void trim_spaces_back(char *ptr) {
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if (ptr[0] != ' ') {
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return;
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}
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while (ptr[-1] == ' ') {
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ptr--;
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}
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ptr[0] = '\0';
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}
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#define PKG_INFO_STRING(key, field) if (strcmp(key_ptr, key) == 0) { pkg_info->field = strdup(value_ptr); goto advance; }
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#define PKG_INFO_INT(key, field) if (strcmp(key_ptr, key) == 0) { pkg_info->field = atoi(value_ptr); goto advance; }
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#define PKG_INFO_ARRAY(key, field) if (strcmp(key_ptr, key) == 0) { \
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if (pkg_info->field == NULL) { pkg_info->field = dynarray_init(4); } \
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dynarray_add(pkg_info->field, value_ptr); goto advance; \
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}
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int package_info_parse(PkgInfo *pkg_info, char *pkg_info_str) {
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char *offset_ptr, *equals_ptr, *key_ptr, *value_ptr;
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bool end = false;
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// Iterate over all lines in file
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while (!end) {
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// This pointer will always point to the final character of the
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// current line, be it the position of a newline or the NULL byte at
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// the end of the entire string
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offset_ptr = strchr(pkg_info_str, '\n');
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// We replace the newline with a NULL byte. Now we know the line runs
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// until the next NULL byte.
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if (offset_ptr != NULL) {
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offset_ptr[0] = '\0';
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} else {
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// Advance pointer to the NULL byte of the string
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offset_ptr = pkg_info_str + 1;
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while (*offset_ptr != '\0') {
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offset_ptr++;
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}
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end = true;
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}
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// Skip comment lines
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if (pkg_info_str[0] == '#') {
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goto advance;
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}
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equals_ptr = strchr(pkg_info_str, '=');
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// If a line doesn't contain an equals sign, the file is invalid
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if (equals_ptr == NULL) {
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return 1;
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}
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// Trim whitespace from key
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key_ptr = trim_spaces_front(pkg_info_str);
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trim_spaces_back(equals_ptr - 1);
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// Trim spaces from value
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value_ptr = trim_spaces_front(equals_ptr + 1);
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trim_spaces_back(offset_ptr - 1);
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// Match key
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PKG_INFO_STRING("pkgname", name);
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PKG_INFO_STRING("pkgbase", base);
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PKG_INFO_STRING("pkgver", version);
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PKG_INFO_STRING("pkgdesc", description);
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PKG_INFO_INT("size", size);
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PKG_INFO_STRING("url", url);
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PKG_INFO_STRING("arch", arch);
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PKG_INFO_INT("builddate", build_date);
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PKG_INFO_STRING("packager", packager);
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PKG_INFO_STRING("pgpsig", pgpsig);
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PKG_INFO_INT("pgpsigsize", pgpsigsize);
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PKG_INFO_ARRAY("group", groups);
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PKG_INFO_ARRAY("license", licenses);
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PKG_INFO_ARRAY("replaces", replaces);
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PKG_INFO_ARRAY("depend", depends);
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PKG_INFO_ARRAY("optdepend", optdepends);
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PKG_INFO_ARRAY("makedepend", makedepends);
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PKG_INFO_ARRAY("checkdepend", checkdepends);
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advance:
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pkg_info_str = offset_ptr + 1;
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continue;
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}
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return 0;
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}
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